/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.widget;

import static android.widget.SuggestionsAdapter.getColumnString;

import android.annotation.Nullable;
import android.app.PendingIntent;
import android.app.SearchManager;
import android.app.SearchableInfo;
import android.content.ActivityNotFoundException;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.database.Cursor;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.speech.RecognizerIntent;
import android.text.Editable;
import android.text.InputType;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.text.style.ImageSpan;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.TypedValue;
import android.view.CollapsibleActionView;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.TouchDelegate;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.TextView.OnEditorActionListener;

import com.android.internal.R;

import java.util.WeakHashMap;

A widget that provides a user interface for the user to enter a search query and submit a request
to a search provider. Shows a list of query suggestions or results, if available, and allows the
user to pick a suggestion or result to launch into.
 When the SearchView is used in an ActionBar as an action view for a collapsible menu item, it needs to be set to iconified by default using 
setIconifiedByDefault(true). This is the default, so nothing needs to be done. 

If you want the search field to always be visible, then call setIconifiedByDefault(false).


Developer Guides
For information about using SearchView, read the Search developer guide.

See Also:
MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW
@attr
ref android.R.styleable#SearchView_iconifiedByDefault
@attr
ref android.R.styleable#SearchView_imeOptions
@attr
ref android.R.styleable#SearchView_inputType
@attr
ref android.R.styleable#SearchView_maxWidth
@attr
ref android.R.styleable#SearchView_queryHint/**
 * A widget that provides a user interface for the user to enter a search query and submit a request
 * to a search provider. Shows a list of query suggestions or results, if available, and allows the
 * user to pick a suggestion or result to launch into.
 *
 * <p>
 * When the SearchView is used in an ActionBar as an action view for a collapsible menu item, it
 * needs to be set to iconified by default using {@link #setIconifiedByDefault(boolean)
 * setIconifiedByDefault(true)}. This is the default, so nothing needs to be done.
 * </p>
 * <p>
 * If you want the search field to always be visible, then call setIconifiedByDefault(false).
 * </p>
 *
 * <div class="special reference">
 * <h3>Developer Guides</h3>
 * <p>For information about using {@code SearchView}, read the
 * <a href="{@docRoot}guide/topics/search/index.html">Search</a> developer guide.</p>
 * </div>
 *
 * @see android.view.MenuItem#SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW
 * @attr ref android.R.styleable#SearchView_iconifiedByDefault
 * @attr ref android.R.styleable#SearchView_imeOptions
 * @attr ref android.R.styleable#SearchView_inputType
 * @attr ref android.R.styleable#SearchView_maxWidth
 * @attr ref android.R.styleable#SearchView_queryHint
 */
public class SearchView extends LinearLayout implements CollapsibleActionView {

    private static final boolean DBG = false;
    private static final String LOG_TAG = "SearchView";

    
Private constant for removing the microphone in the keyboard.
/**
     * Private constant for removing the microphone in the keyboard.
     */
    private static final String IME_OPTION_NO_MICROPHONE = "nm";

    private final SearchAutoComplete mSearchSrcTextView;
    private final View mSearchEditFrame;
    private final View mSearchPlate;
    private final View mSubmitArea;
    private final ImageView mSearchButton;
    private final ImageView mGoButton;
    private final ImageView mCloseButton;
    private final ImageView mVoiceButton;
    private final View mDropDownAnchor;

    private UpdatableTouchDelegate mTouchDelegate;
    private Rect mSearchSrcTextViewBounds = new Rect();
    private Rect mSearchSrtTextViewBoundsExpanded = new Rect();
    private int[] mTemp = new int[2];
    private int[] mTemp2 = new int[2];

    
Icon optionally displayed when the SearchView is collapsed. /** Icon optionally displayed when the SearchView is collapsed. */
    private final ImageView mCollapsedIcon;

    
Drawable used as an EditText hint. /** Drawable used as an EditText hint. */
    private final Drawable mSearchHintIcon;

    // Resources used by SuggestionsAdapter to display suggestions.
    private final int mSuggestionRowLayout;
    private final int mSuggestionCommitIconResId;

    // Intents used for voice searching.
    private final Intent mVoiceWebSearchIntent;
    private final Intent mVoiceAppSearchIntent;

    private final CharSequence mDefaultQueryHint;

    private OnQueryTextListener mOnQueryChangeListener;
    private OnCloseListener mOnCloseListener;
    private OnFocusChangeListener mOnQueryTextFocusChangeListener;
    private OnSuggestionListener mOnSuggestionListener;
    private OnClickListener mOnSearchClickListener;

    private boolean mIconifiedByDefault;
    private boolean mIconified;
    private CursorAdapter mSuggestionsAdapter;
    private boolean mSubmitButtonEnabled;
    private CharSequence mQueryHint;
    private boolean mQueryRefinement;
    private boolean mClearingFocus;
    private int mMaxWidth;
    private boolean mVoiceButtonEnabled;
    private CharSequence mOldQueryText;
    private CharSequence mUserQuery;
    private boolean mExpandedInActionView;
    private int mCollapsedImeOptions;

    private SearchableInfo mSearchable;
    private Bundle mAppSearchData;

    private Runnable mUpdateDrawableStateRunnable = new Runnable() {
        public void run() {
            updateFocusedState();
        }
    };

    private Runnable mReleaseCursorRunnable = new Runnable() {
        public void run() {
            if (mSuggestionsAdapter != null && mSuggestionsAdapter instanceof SuggestionsAdapter) {
                mSuggestionsAdapter.changeCursor(null);
            }
        }
    };

    // A weak map of drawables we've gotten from other packages, so we don't load them
    // more than once.
    private final WeakHashMap<String, Drawable.ConstantState> mOutsideDrawablesCache =
            new WeakHashMap<String, Drawable.ConstantState>();

    
Callbacks for changes to the query text.
/**
     * Callbacks for changes to the query text.
     */
    public interface OnQueryTextListener {

        
Called when the user submits the query. This could be due to a key press on the
keyboard or due to pressing a submit button.
The listener can override the standard behavior by returning true
to indicate that it has handled the submit request. Otherwise return false to
let the SearchView handle the submission by launching any associated intent.
Params:
query – the query text that is to be submitted
Returns:
true if the query has been handled by the listener, false to let the
SearchView perform the default action./**
         * Called when the user submits the query. This could be due to a key press on the
         * keyboard or due to pressing a submit button.
         * The listener can override the standard behavior by returning true
         * to indicate that it has handled the submit request. Otherwise return false to
         * let the SearchView handle the submission by launching any associated intent.
         *
         * @param query the query text that is to be submitted
         *
         * @return true if the query has been handled by the listener, false to let the
         * SearchView perform the default action.
         */
        boolean onQueryTextSubmit(String query);

        
Called when the query text is changed by the user.
Params:
newText – the new content of the query text field.
Returns:
false if the SearchView should perform the default action of showing any
suggestions if available, true if the action was handled by the listener./**
         * Called when the query text is changed by the user.
         *
         * @param newText the new content of the query text field.
         *
         * @return false if the SearchView should perform the default action of showing any
         * suggestions if available, true if the action was handled by the listener.
         */
        boolean onQueryTextChange(String newText);
    }

    public interface OnCloseListener {

        
The user is attempting to close the SearchView.
Returns:
true if the listener wants to override the default behavior of clearing the
text field and dismissing it, false otherwise./**
         * The user is attempting to close the SearchView.
         *
         * @return true if the listener wants to override the default behavior of clearing the
         * text field and dismissing it, false otherwise.
         */
        boolean onClose();
    }

    
Callback interface for selection events on suggestions. These callbacks are only relevant when a SearchableInfo has been specified by setSearchableInfo. /**
     * Callback interface for selection events on suggestions. These callbacks
     * are only relevant when a SearchableInfo has been specified by {@link #setSearchableInfo}.
     */
    public interface OnSuggestionListener {

        
Called when a suggestion was selected by navigating to it.
Params:
position – the absolute position in the list of suggestions.
Returns:
true if the listener handles the event and wants to override the default
behavior of possibly rewriting the query based on the selected item, false otherwise./**
         * Called when a suggestion was selected by navigating to it.
         * @param position the absolute position in the list of suggestions.
         *
         * @return true if the listener handles the event and wants to override the default
         * behavior of possibly rewriting the query based on the selected item, false otherwise.
         */
        boolean onSuggestionSelect(int position);

        
Called when a suggestion was clicked.
Params:
position – the absolute position of the clicked item in the list of suggestions.
Returns:
true if the listener handles the event and wants to override the default
behavior of launching any intent or submitting a search query specified on that item.
Return false otherwise./**
         * Called when a suggestion was clicked.
         * @param position the absolute position of the clicked item in the list of suggestions.
         *
         * @return true if the listener handles the event and wants to override the default
         * behavior of launching any intent or submitting a search query specified on that item.
         * Return false otherwise.
         */
        boolean onSuggestionClick(int position);
    }

    public SearchView(Context context) {
        this(context, null);
    }

    public SearchView(Context context, AttributeSet attrs) {
        this(context, attrs, R.attr.searchViewStyle);
    }

    public SearchView(Context context, AttributeSet attrs, int defStyleAttr) {
        this(context, attrs, defStyleAttr, 0);
    }

    public SearchView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);

        final TypedArray a = context.obtainStyledAttributes(
                attrs, R.styleable.SearchView, defStyleAttr, defStyleRes);
        final LayoutInflater inflater = (LayoutInflater) context.getSystemService(
                Context.LAYOUT_INFLATER_SERVICE);
        final int layoutResId = a.getResourceId(
                R.styleable.SearchView_layout, R.layout.search_view);
        inflater.inflate(layoutResId, this, true);

        mSearchSrcTextView = (SearchAutoComplete) findViewById(R.id.search_src_text);
        mSearchSrcTextView.setSearchView(this);

        mSearchEditFrame = findViewById(R.id.search_edit_frame);
        mSearchPlate = findViewById(R.id.search_plate);
        mSubmitArea = findViewById(R.id.submit_area);
        mSearchButton = (ImageView) findViewById(R.id.search_button);
        mGoButton = (ImageView) findViewById(R.id.search_go_btn);
        mCloseButton = (ImageView) findViewById(R.id.search_close_btn);
        mVoiceButton = (ImageView) findViewById(R.id.search_voice_btn);
        mCollapsedIcon = (ImageView) findViewById(R.id.search_mag_icon);

        // Set up icons and backgrounds.
        mSearchPlate.setBackground(a.getDrawable(R.styleable.SearchView_queryBackground));
        mSubmitArea.setBackground(a.getDrawable(R.styleable.SearchView_submitBackground));
        mSearchButton.setImageDrawable(a.getDrawable(R.styleable.SearchView_searchIcon));
        mGoButton.setImageDrawable(a.getDrawable(R.styleable.SearchView_goIcon));
        mCloseButton.setImageDrawable(a.getDrawable(R.styleable.SearchView_closeIcon));
        mVoiceButton.setImageDrawable(a.getDrawable(R.styleable.SearchView_voiceIcon));
        mCollapsedIcon.setImageDrawable(a.getDrawable(R.styleable.SearchView_searchIcon));

        // Prior to L MR1, the search hint icon defaulted to searchIcon. If the
        // style does not have an explicit value set, fall back to that.
        if (a.hasValueOrEmpty(R.styleable.SearchView_searchHintIcon)) {
            mSearchHintIcon = a.getDrawable(R.styleable.SearchView_searchHintIcon);
        } else {
            mSearchHintIcon = a.getDrawable(R.styleable.SearchView_searchIcon);
        }

        // Extract dropdown layout resource IDs for later use.
        mSuggestionRowLayout = a.getResourceId(R.styleable.SearchView_suggestionRowLayout,
                R.layout.search_dropdown_item_icons_2line);
        mSuggestionCommitIconResId = a.getResourceId(R.styleable.SearchView_commitIcon, 0);

        mSearchButton.setOnClickListener(mOnClickListener);
        mCloseButton.setOnClickListener(mOnClickListener);
        mGoButton.setOnClickListener(mOnClickListener);
        mVoiceButton.setOnClickListener(mOnClickListener);
        mSearchSrcTextView.setOnClickListener(mOnClickListener);

        mSearchSrcTextView.addTextChangedListener(mTextWatcher);
        mSearchSrcTextView.setOnEditorActionListener(mOnEditorActionListener);
        mSearchSrcTextView.setOnItemClickListener(mOnItemClickListener);
        mSearchSrcTextView.setOnItemSelectedListener(mOnItemSelectedListener);
        mSearchSrcTextView.setOnKeyListener(mTextKeyListener);

        // Inform any listener of focus changes
        mSearchSrcTextView.setOnFocusChangeListener(new OnFocusChangeListener() {

            public void onFocusChange(View v, boolean hasFocus) {
                if (mOnQueryTextFocusChangeListener != null) {
                    mOnQueryTextFocusChangeListener.onFocusChange(SearchView.this, hasFocus);
                }
            }
        });
        setIconifiedByDefault(a.getBoolean(R.styleable.SearchView_iconifiedByDefault, true));

        final int maxWidth = a.getDimensionPixelSize(R.styleable.SearchView_maxWidth, -1);
        if (maxWidth != -1) {
            setMaxWidth(maxWidth);
        }

        mDefaultQueryHint = a.getText(R.styleable.SearchView_defaultQueryHint);
        mQueryHint = a.getText(R.styleable.SearchView_queryHint);

        final int imeOptions = a.getInt(R.styleable.SearchView_imeOptions, -1);
        if (imeOptions != -1) {
            setImeOptions(imeOptions);
        }

        final int inputType = a.getInt(R.styleable.SearchView_inputType, -1);
        if (inputType != -1) {
            setInputType(inputType);
        }

        if (getFocusable() == FOCUSABLE_AUTO) {
            setFocusable(FOCUSABLE);
        }

        a.recycle();

        // Save voice intent for later queries/launching
        mVoiceWebSearchIntent = new Intent(RecognizerIntent.ACTION_WEB_SEARCH);
        mVoiceWebSearchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        mVoiceWebSearchIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                RecognizerIntent.LANGUAGE_MODEL_WEB_SEARCH);

        mVoiceAppSearchIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        mVoiceAppSearchIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        mDropDownAnchor = findViewById(mSearchSrcTextView.getDropDownAnchor());
        if (mDropDownAnchor != null) {
            mDropDownAnchor.addOnLayoutChangeListener(new OnLayoutChangeListener() {
                @Override
                public void onLayoutChange(View v, int left, int top, int right, int bottom,
                        int oldLeft, int oldTop, int oldRight, int oldBottom) {
                    adjustDropDownSizeAndPosition();
                }
            });
        }

        updateViewsVisibility(mIconifiedByDefault);
        updateQueryHint();
    }

    int getSuggestionRowLayout() {
        return mSuggestionRowLayout;
    }

    int getSuggestionCommitIconResId() {
        return mSuggestionCommitIconResId;
    }

    
Sets the SearchableInfo for this SearchView. Properties in the SearchableInfo are used
to display labels, hints, suggestions, create intents for launching search results screens
and controlling other affordances such as a voice button.
Params:
searchable – a SearchableInfo can be retrieved from the SearchManager, for a specific
activity or a global search provider./**
     * Sets the SearchableInfo for this SearchView. Properties in the SearchableInfo are used
     * to display labels, hints, suggestions, create intents for launching search results screens
     * and controlling other affordances such as a voice button.
     *
     * @param searchable a SearchableInfo can be retrieved from the SearchManager, for a specific
     * activity or a global search provider.
     */
    public void setSearchableInfo(SearchableInfo searchable) {
        mSearchable = searchable;
        if (mSearchable != null) {
            updateSearchAutoComplete();
            updateQueryHint();
        }
        // Cache the voice search capability
        mVoiceButtonEnabled = hasVoiceSearch();

        if (mVoiceButtonEnabled) {
            // Disable the microphone on the keyboard, as a mic is displayed near the text box
            // TODO: use imeOptions to disable voice input when the new API will be available
            mSearchSrcTextView.setPrivateImeOptions(IME_OPTION_NO_MICROPHONE);
        }
        updateViewsVisibility(isIconified());
    }

    
Sets the APP_DATA for legacy SearchDialog use.
Params:
appSearchData – bundle provided by the app when launching the search dialog
@hide
/**
     * Sets the APP_DATA for legacy SearchDialog use.
     * @param appSearchData bundle provided by the app when launching the search dialog
     * @hide
     */
    public void setAppSearchData(Bundle appSearchData) {
        mAppSearchData = appSearchData;
    }

    
Sets the IME options on the query text field.
Params:
imeOptions – the options to set on the query text field
See Also:
setImeOptions.setImeOptions(int)
@attr
ref android.R.styleable#SearchView_imeOptions/**
     * Sets the IME options on the query text field.
     *
     * @see TextView#setImeOptions(int)
     * @param imeOptions the options to set on the query text field
     *
     * @attr ref android.R.styleable#SearchView_imeOptions
     */
    public void setImeOptions(int imeOptions) {
        mSearchSrcTextView.setImeOptions(imeOptions);
    }

    
Returns the IME options set on the query text field.
See Also:
TextView.setImeOptions(int)
Returns:
the ime options
@attr
ref android.R.styleable#SearchView_imeOptions/**
     * Returns the IME options set on the query text field.
     * @return the ime options
     * @see TextView#setImeOptions(int)
     *
     * @attr ref android.R.styleable#SearchView_imeOptions
     */
    public int getImeOptions() {
        return mSearchSrcTextView.getImeOptions();
    }

    
Sets the input type on the query text field.
Params:
inputType – the input type to set on the query text field
See Also:
setInputType.setInputType(int)
@attr
ref android.R.styleable#SearchView_inputType/**
     * Sets the input type on the query text field.
     *
     * @see TextView#setInputType(int)
     * @param inputType the input type to set on the query text field
     *
     * @attr ref android.R.styleable#SearchView_inputType
     */
    public void setInputType(int inputType) {
        mSearchSrcTextView.setInputType(inputType);
    }

    
Returns the input type set on the query text field.
Returns:
the input type
@attr
ref android.R.styleable#SearchView_inputType/**
     * Returns the input type set on the query text field.
     * @return the input type
     *
     * @attr ref android.R.styleable#SearchView_inputType
     */
    public int getInputType() {
        return mSearchSrcTextView.getInputType();
    }

    
@hide
/** @hide */
    @Override
    public boolean requestFocus(int direction, Rect previouslyFocusedRect) {
        // Don't accept focus if in the middle of clearing focus
        if (mClearingFocus) return false;
        // Check if SearchView is focusable.
        if (!isFocusable()) return false;
        // If it is not iconified, then give the focus to the text field
        if (!isIconified()) {
            boolean result = mSearchSrcTextView.requestFocus(direction, previouslyFocusedRect);
            if (result) {
                updateViewsVisibility(false);
            }
            return result;
        } else {
            return super.requestFocus(direction, previouslyFocusedRect);
        }
    }

    
@hide
/** @hide */
    @Override
    public void clearFocus() {
        mClearingFocus = true;
        super.clearFocus();
        mSearchSrcTextView.clearFocus();
        mSearchSrcTextView.setImeVisibility(false);
        mClearingFocus = false;
    }

    
Sets a listener for user actions within the SearchView.
Params:
listener – the listener object that receives callbacks when the user performs
actions in the SearchView such as clicking on buttons or typing a query./**
     * Sets a listener for user actions within the SearchView.
     *
     * @param listener the listener object that receives callbacks when the user performs
     * actions in the SearchView such as clicking on buttons or typing a query.
     */
    public void setOnQueryTextListener(OnQueryTextListener listener) {
        mOnQueryChangeListener = listener;
    }

    
Sets a listener to inform when the user closes the SearchView.
Params:
listener – the listener to call when the user closes the SearchView./**
     * Sets a listener to inform when the user closes the SearchView.
     *
     * @param listener the listener to call when the user closes the SearchView.
     */
    public void setOnCloseListener(OnCloseListener listener) {
        mOnCloseListener = listener;
    }

    
Sets a listener to inform when the focus of the query text field changes.
Params:
listener – the listener to inform of focus changes./**
     * Sets a listener to inform when the focus of the query text field changes.
     *
     * @param listener the listener to inform of focus changes.
     */
    public void setOnQueryTextFocusChangeListener(OnFocusChangeListener listener) {
        mOnQueryTextFocusChangeListener = listener;
    }

    
Sets a listener to inform when a suggestion is focused or clicked.
Params:
listener – the listener to inform of suggestion selection events./**
     * Sets a listener to inform when a suggestion is focused or clicked.
     *
     * @param listener the listener to inform of suggestion selection events.
     */
    public void setOnSuggestionListener(OnSuggestionListener listener) {
        mOnSuggestionListener = listener;
    }

    
Sets a listener to inform when the search button is pressed. This is only relevant when the text field is not visible by default. Calling 
setIconified(false) can also cause this listener to be informed. 
Params:
listener – the listener to inform when the search button is clicked or
the text field is programmatically de-iconified./**
     * Sets a listener to inform when the search button is pressed. This is only
     * relevant when the text field is not visible by default. Calling {@link #setIconified
     * setIconified(false)} can also cause this listener to be informed.
     *
     * @param listener the listener to inform when the search button is clicked or
     * the text field is programmatically de-iconified.
     */
    public void setOnSearchClickListener(OnClickListener listener) {
        mOnSearchClickListener = listener;
    }

    
Returns the query string currently in the text field.
Returns:
the query string/**
     * Returns the query string currently in the text field.
     *
     * @return the query string
     */
    public CharSequence getQuery() {
        return mSearchSrcTextView.getText();
    }

    
Sets a query string in the text field and optionally submits the query as well.
Params:
query – the query string. This replaces any query text already present in the
text field.
submit – whether to submit the query right now or only update the contents of
text field./**
     * Sets a query string in the text field and optionally submits the query as well.
     *
     * @param query the query string. This replaces any query text already present in the
     * text field.
     * @param submit whether to submit the query right now or only update the contents of
     * text field.
     */
    public void setQuery(CharSequence query, boolean submit) {
        mSearchSrcTextView.setText(query);
        if (query != null) {
            mSearchSrcTextView.setSelection(mSearchSrcTextView.length());
            mUserQuery = query;
        }

        // If the query is not empty and submit is requested, submit the query
        if (submit && !TextUtils.isEmpty(query)) {
            onSubmitQuery();
        }
    }

    
Sets the hint text to display in the query text field. This overrides any hint specified in the SearchableInfo. 

This value may be specified as an empty string to prevent any query hint
from being displayed.
Params:
hint – the hint text to display or null to clear
@attr
ref android.R.styleable#SearchView_queryHint/**
     * Sets the hint text to display in the query text field. This overrides
     * any hint specified in the {@link SearchableInfo}.
     * <p>
     * This value may be specified as an empty string to prevent any query hint
     * from being displayed.
     *
     * @param hint the hint text to display or {@code null} to clear
     * @attr ref android.R.styleable#SearchView_queryHint
     */
    public void setQueryHint(@Nullable CharSequence hint) {
        mQueryHint = hint;
        updateQueryHint();
    }

    
Returns the hint text that will be displayed in the query text field.

The displayed query hint is chosen in the following order:

Non-null value set with setQueryHint(CharSequence) 
Value specified in XML using android:queryHint 
Valid string resource ID exposed by the SearchableInfo via SearchableInfo.getHintId() 
Default hint provided by the theme against which the view was
    inflated

Returns:
the displayed query hint text, or null if none set
@attr
ref android.R.styleable#SearchView_queryHint/**
     * Returns the hint text that will be displayed in the query text field.
     * <p>
     * The displayed query hint is chosen in the following order:
     * <ol>
     * <li>Non-null value set with {@link #setQueryHint(CharSequence)}
     * <li>Value specified in XML using
     *     {@link android.R.styleable#SearchView_queryHint android:queryHint}
     * <li>Valid string resource ID exposed by the {@link SearchableInfo} via
     *     {@link SearchableInfo#getHintId()}
     * <li>Default hint provided by the theme against which the view was
     *     inflated
     * </ol>
     *
     * @return the displayed query hint text, or {@code null} if none set
     * @attr ref android.R.styleable#SearchView_queryHint
     */
    @Nullable
    public CharSequence getQueryHint() {
        final CharSequence hint;
        if (mQueryHint != null) {
            hint = mQueryHint;
        } else if (mSearchable != null && mSearchable.getHintId() != 0) {
            hint = getContext().getText(mSearchable.getHintId());
        } else {
            hint = mDefaultQueryHint;
        }
        return hint;
    }

    
Sets the default or resting state of the search field. If true, a single search icon is
shown by default and expands to show the text field and other buttons when pressed. Also,
if the default state is iconified, then it collapses to that state when the close button
is pressed. Changes to this property will take effect immediately.
The default value is true.
Params:
iconified – whether the search field should be iconified by default
@attr
ref android.R.styleable#SearchView_iconifiedByDefault/**
     * Sets the default or resting state of the search field. If true, a single search icon is
     * shown by default and expands to show the text field and other buttons when pressed. Also,
     * if the default state is iconified, then it collapses to that state when the close button
     * is pressed. Changes to this property will take effect immediately.
     *
     * <p>The default value is true.</p>
     *
     * @param iconified whether the search field should be iconified by default
     *
     * @attr ref android.R.styleable#SearchView_iconifiedByDefault
     */
    public void setIconifiedByDefault(boolean iconified) {
        if (mIconifiedByDefault == iconified) return;
        mIconifiedByDefault = iconified;
        updateViewsVisibility(iconified);
        updateQueryHint();
    }

    
Returns the default iconified state of the search field.
Returns:
@attr
ref android.R.styleable#SearchView_iconifiedByDefault/**
     * Returns the default iconified state of the search field.
     * @return
     *
     * @attr ref android.R.styleable#SearchView_iconifiedByDefault
     */
    public boolean isIconfiedByDefault() {
        return mIconifiedByDefault;
    }

    
Iconifies or expands the SearchView. Any query text is cleared when iconified. This is a temporary state and does not override the default iconified state set by setIconifiedByDefault(boolean). If the default state is iconified, then a false here will only be valid until the user closes the field. And if the default state is expanded, then a true here will only clear the text field and not close it. 
Params:
iconify – a true value will collapse the SearchView to an icon, while a false will
expand it./**
     * Iconifies or expands the SearchView. Any query text is cleared when iconified. This is
     * a temporary state and does not override the default iconified state set by
     * {@link #setIconifiedByDefault(boolean)}. If the default state is iconified, then
     * a false here will only be valid until the user closes the field. And if the default
     * state is expanded, then a true here will only clear the text field and not close it.
     *
     * @param iconify a true value will collapse the SearchView to an icon, while a false will
     * expand it.
     */
    public void setIconified(boolean iconify) {
        if (iconify) {
            onCloseClicked();
        } else {
            onSearchClicked();
        }
    }

    
Returns the current iconified state of the SearchView.
Returns:
true if the SearchView is currently iconified, false if the search field is
fully visible./**
     * Returns the current iconified state of the SearchView.
     *
     * @return true if the SearchView is currently iconified, false if the search field is
     * fully visible.
     */
    public boolean isIconified() {
        return mIconified;
    }

    
Enables showing a submit button when the query is non-empty. In cases where the SearchView
is being used to filter the contents of the current activity and doesn't launch a separate
results activity, then the submit button should be disabled.
Params:
enabled – true to show a submit button for submitting queries, false if a submit
button is not required./**
     * Enables showing a submit button when the query is non-empty. In cases where the SearchView
     * is being used to filter the contents of the current activity and doesn't launch a separate
     * results activity, then the submit button should be disabled.
     *
     * @param enabled true to show a submit button for submitting queries, false if a submit
     * button is not required.
     */
    public void setSubmitButtonEnabled(boolean enabled) {
        mSubmitButtonEnabled = enabled;
        updateViewsVisibility(isIconified());
    }

    
Returns whether the submit button is enabled when necessary or never displayed.
Returns:
whether the submit button is enabled automatically when necessary/**
     * Returns whether the submit button is enabled when necessary or never displayed.
     *
     * @return whether the submit button is enabled automatically when necessary
     */
    public boolean isSubmitButtonEnabled() {
        return mSubmitButtonEnabled;
    }

    
Specifies if a query refinement button should be displayed alongside each suggestion or if it should depend on the flags set in the individual items retrieved from the suggestions provider. Clicking on the query refinement button will replace the text in the query text field with the text from the suggestion. This flag only takes effect if a SearchableInfo has been specified with setSearchableInfo(SearchableInfo) and not when using a custom adapter. 
Params:
enable – true if all items should have a query refinement button, false if only
those items that have a query refinement flag set should have the button.
See Also:
SearchManager.SUGGEST_COLUMN_FLAGS
SearchManager.FLAG_QUERY_REFINEMENT/**
     * Specifies if a query refinement button should be displayed alongside each suggestion
     * or if it should depend on the flags set in the individual items retrieved from the
     * suggestions provider. Clicking on the query refinement button will replace the text
     * in the query text field with the text from the suggestion. This flag only takes effect
     * if a SearchableInfo has been specified with {@link #setSearchableInfo(SearchableInfo)}
     * and not when using a custom adapter.
     *
     * @param enable true if all items should have a query refinement button, false if only
     * those items that have a query refinement flag set should have the button.
     *
     * @see SearchManager#SUGGEST_COLUMN_FLAGS
     * @see SearchManager#FLAG_QUERY_REFINEMENT
     */
    public void setQueryRefinementEnabled(boolean enable) {
        mQueryRefinement = enable;
        if (mSuggestionsAdapter instanceof SuggestionsAdapter) {
            ((SuggestionsAdapter) mSuggestionsAdapter).setQueryRefinement(
                    enable ? SuggestionsAdapter.REFINE_ALL : SuggestionsAdapter.REFINE_BY_ENTRY);
        }
    }

    
Returns whether query refinement is enabled for all items or only specific ones.
Returns:
true if enabled for all items, false otherwise./**
     * Returns whether query refinement is enabled for all items or only specific ones.
     * @return true if enabled for all items, false otherwise.
     */
    public boolean isQueryRefinementEnabled() {
        return mQueryRefinement;
    }

    
You can set a custom adapter if you wish. Otherwise the default adapter is used to
display the suggestions from the suggestions provider associated with the SearchableInfo.
See Also:
setSearchableInfo(SearchableInfo)/**
     * You can set a custom adapter if you wish. Otherwise the default adapter is used to
     * display the suggestions from the suggestions provider associated with the SearchableInfo.
     *
     * @see #setSearchableInfo(SearchableInfo)
     */
    public void setSuggestionsAdapter(CursorAdapter adapter) {
        mSuggestionsAdapter = adapter;

        mSearchSrcTextView.setAdapter(mSuggestionsAdapter);
    }

    
Returns the adapter used for suggestions, if any.
Returns:
the suggestions adapter/**
     * Returns the adapter used for suggestions, if any.
     * @return the suggestions adapter
     */
    public CursorAdapter getSuggestionsAdapter() {
        return mSuggestionsAdapter;
    }

    
Makes the view at most this many pixels wide
@attr
ref android.R.styleable#SearchView_maxWidth/**
     * Makes the view at most this many pixels wide
     *
     * @attr ref android.R.styleable#SearchView_maxWidth
     */
    public void setMaxWidth(int maxpixels) {
        mMaxWidth = maxpixels;

        requestLayout();
    }

    
Gets the specified maximum width in pixels, if set. Returns zero if
no maximum width was specified.
Returns:
the maximum width of the view
@attr
ref android.R.styleable#SearchView_maxWidth/**
     * Gets the specified maximum width in pixels, if set. Returns zero if
     * no maximum width was specified.
     * @return the maximum width of the view
     *
     * @attr ref android.R.styleable#SearchView_maxWidth
     */
    public int getMaxWidth() {
        return mMaxWidth;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // Let the standard measurements take effect in iconified state.
        if (isIconified()) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
            return;
        }

        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        int width = MeasureSpec.getSize(widthMeasureSpec);

        switch (widthMode) {
        case MeasureSpec.AT_MOST:
            // If there is an upper limit, don't exceed maximum width (explicit or implicit)
            if (mMaxWidth > 0) {
                width = Math.min(mMaxWidth, width);
            } else {
                width = Math.min(getPreferredWidth(), width);
            }
            break;
        case MeasureSpec.EXACTLY:
            // If an exact width is specified, still don't exceed any specified maximum width
            if (mMaxWidth > 0) {
                width = Math.min(mMaxWidth, width);
            }
            break;
        case MeasureSpec.UNSPECIFIED:
            // Use maximum width, if specified, else preferred width
            width = mMaxWidth > 0 ? mMaxWidth : getPreferredWidth();
            break;
        }
        widthMode = MeasureSpec.EXACTLY;

        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
        int height = MeasureSpec.getSize(heightMeasureSpec);

        switch (heightMode) {
            case MeasureSpec.AT_MOST:
                height = Math.min(getPreferredHeight(), height);
                break;
            case MeasureSpec.UNSPECIFIED:
                height = getPreferredHeight();
                break;
        }
        heightMode = MeasureSpec.EXACTLY;

        super.onMeasure(MeasureSpec.makeMeasureSpec(width, widthMode),
                MeasureSpec.makeMeasureSpec(height, heightMode));
    }

    @Override
    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
        super.onLayout(changed, left, top, right, bottom);

        if (changed) {
            // Expand mSearchSrcTextView touch target to be the height of the parent in order to
            // allow it to be up to 48dp.
            getChildBoundsWithinSearchView(mSearchSrcTextView, mSearchSrcTextViewBounds);
            mSearchSrtTextViewBoundsExpanded.set(
                    mSearchSrcTextViewBounds.left, 0, mSearchSrcTextViewBounds.right, bottom - top);
            if (mTouchDelegate == null) {
                mTouchDelegate = new UpdatableTouchDelegate(mSearchSrtTextViewBoundsExpanded,
                        mSearchSrcTextViewBounds, mSearchSrcTextView);
                setTouchDelegate(mTouchDelegate);
            } else {
                mTouchDelegate.setBounds(mSearchSrtTextViewBoundsExpanded, mSearchSrcTextViewBounds);
            }
        }
    }

    private void getChildBoundsWithinSearchView(View view, Rect rect) {
        view.getLocationInWindow(mTemp);
        getLocationInWindow(mTemp2);
        final int top = mTemp[1] - mTemp2[1];
        final int left = mTemp[0] - mTemp2[0];
        rect.set(left , top, left + view.getWidth(), top + view.getHeight());
    }

    private int getPreferredWidth() {
        return getContext().getResources()
                .getDimensionPixelSize(R.dimen.search_view_preferred_width);
    }

    private int getPreferredHeight() {
        return getContext().getResources()
                .getDimensionPixelSize(R.dimen.search_view_preferred_height);
    }

    private void updateViewsVisibility(final boolean collapsed) {
        mIconified = collapsed;
        // Visibility of views that are visible when collapsed
        final int visCollapsed = collapsed ? VISIBLE : GONE;
        // Is there text in the query
        final boolean hasText = !TextUtils.isEmpty(mSearchSrcTextView.getText());

        mSearchButton.setVisibility(visCollapsed);
        updateSubmitButton(hasText);
        mSearchEditFrame.setVisibility(collapsed ? GONE : VISIBLE);

        final int iconVisibility;
        if (mCollapsedIcon.getDrawable() == null || mIconifiedByDefault) {
            iconVisibility = GONE;
        } else {
            iconVisibility = VISIBLE;
        }
        mCollapsedIcon.setVisibility(iconVisibility);

        updateCloseButton();
        updateVoiceButton(!hasText);
        updateSubmitArea();
    }

    private boolean hasVoiceSearch() {
        if (mSearchable != null && mSearchable.getVoiceSearchEnabled()) {
            Intent testIntent = null;
            if (mSearchable.getVoiceSearchLaunchWebSearch()) {
                testIntent = mVoiceWebSearchIntent;
            } else if (mSearchable.getVoiceSearchLaunchRecognizer()) {
                testIntent = mVoiceAppSearchIntent;
            }
            if (testIntent != null) {
                ResolveInfo ri = getContext().getPackageManager().resolveActivity(testIntent,
                        PackageManager.MATCH_DEFAULT_ONLY);
                return ri != null;
            }
        }
        return false;
    }

    private boolean isSubmitAreaEnabled() {
        return (mSubmitButtonEnabled || mVoiceButtonEnabled) && !isIconified();
    }

    private void updateSubmitButton(boolean hasText) {
        int visibility = GONE;
        if (mSubmitButtonEnabled && isSubmitAreaEnabled() && hasFocus()
                && (hasText || !mVoiceButtonEnabled)) {
            visibility = VISIBLE;
        }
        mGoButton.setVisibility(visibility);
    }

    private void updateSubmitArea() {
        int visibility = GONE;
        if (isSubmitAreaEnabled()
                && (mGoButton.getVisibility() == VISIBLE
                        || mVoiceButton.getVisibility() == VISIBLE)) {
            visibility = VISIBLE;
        }
        mSubmitArea.setVisibility(visibility);
    }

    private void updateCloseButton() {
        final boolean hasText = !TextUtils.isEmpty(mSearchSrcTextView.getText());
        // Should we show the close button? It is not shown if there's no focus,
        // field is not iconified by default and there is no text in it.
        final boolean showClose = hasText || (mIconifiedByDefault && !mExpandedInActionView);
        mCloseButton.setVisibility(showClose ? VISIBLE : GONE);
        final Drawable closeButtonImg = mCloseButton.getDrawable();
        if (closeButtonImg != null){
            closeButtonImg.setState(hasText ? ENABLED_STATE_SET : EMPTY_STATE_SET);
        }
    }

    private void postUpdateFocusedState() {
        post(mUpdateDrawableStateRunnable);
    }

    private void updateFocusedState() {
        final boolean focused = mSearchSrcTextView.hasFocus();
        final int[] stateSet = focused ? FOCUSED_STATE_SET : EMPTY_STATE_SET;
        final Drawable searchPlateBg = mSearchPlate.getBackground();
        if (searchPlateBg != null) {
            searchPlateBg.setState(stateSet);
        }
        final Drawable submitAreaBg = mSubmitArea.getBackground();
        if (submitAreaBg != null) {
            submitAreaBg.setState(stateSet);
        }
        invalidate();
    }

    @Override
    protected void onDetachedFromWindow() {
        removeCallbacks(mUpdateDrawableStateRunnable);
        post(mReleaseCursorRunnable);
        super.onDetachedFromWindow();
    }

    
Called by the SuggestionsAdapter
@hide
/**
     * Called by the SuggestionsAdapter
     * @hide
     */
    /* package */void onQueryRefine(CharSequence queryText) {
        setQuery(queryText);
    }

    private final OnClickListener mOnClickListener = new OnClickListener() {

        public void onClick(View v) {
            if (v == mSearchButton) {
                onSearchClicked();
            } else if (v == mCloseButton) {
                onCloseClicked();
            } else if (v == mGoButton) {
                onSubmitQuery();
            } else if (v == mVoiceButton) {
                onVoiceClicked();
            } else if (v == mSearchSrcTextView) {
                forceSuggestionQuery();
            }
        }
    };

    
Handles the key down event for dealing with action keys.
Params:
keyCode – This is the keycode of the typed key, and is the same value as
       found in the KeyEvent parameter.
event – The complete event record for the typed key
Returns:
true if the event was handled here, or false if not./**
     * Handles the key down event for dealing with action keys.
     *
     * @param keyCode This is the keycode of the typed key, and is the same value as
     *        found in the KeyEvent parameter.
     * @param event The complete event record for the typed key
     *
     * @return true if the event was handled here, or false if not.
     */
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (mSearchable == null) {
            return false;
        }

        // if it's an action specified by the searchable activity, launch the
        // entered query with the action key
        SearchableInfo.ActionKeyInfo actionKey = mSearchable.findActionKey(keyCode);
        if ((actionKey != null) && (actionKey.getQueryActionMsg() != null)) {
            launchQuerySearch(keyCode, actionKey.getQueryActionMsg(), mSearchSrcTextView.getText()
                    .toString());
            return true;
        }

        return super.onKeyDown(keyCode, event);
    }

    
React to the user typing "enter" or other hardwired keys while typing in
the search box. This handles these special keys while the edit box has
focus.
/**
     * React to the user typing "enter" or other hardwired keys while typing in
     * the search box. This handles these special keys while the edit box has
     * focus.
     */
    View.OnKeyListener mTextKeyListener = new View.OnKeyListener() {
        public boolean onKey(View v, int keyCode, KeyEvent event) {
            // guard against possible race conditions
            if (mSearchable == null) {
                return false;
            }

            if (DBG) {
                Log.d(LOG_TAG, "mTextListener.onKey(" + keyCode + "," + event + "), selection: "
                        + mSearchSrcTextView.getListSelection());
            }

            // If a suggestion is selected, handle enter, search key, and action keys
            // as presses on the selected suggestion
            if (mSearchSrcTextView.isPopupShowing()
                    && mSearchSrcTextView.getListSelection() != ListView.INVALID_POSITION) {
                return onSuggestionsKey(v, keyCode, event);
            }

            // If there is text in the query box, handle enter, and action keys
            // The search key is handled by the dialog's onKeyDown().
            if (!mSearchSrcTextView.isEmpty() && event.hasNoModifiers()) {
                if (event.getAction() == KeyEvent.ACTION_UP) {
                    if (keyCode == KeyEvent.KEYCODE_ENTER) {
                        v.cancelLongPress();

                        // Launch as a regular search.
                        launchQuerySearch(KeyEvent.KEYCODE_UNKNOWN, null, mSearchSrcTextView.getText()
                                .toString());
                        return true;
                    }
                }
                if (event.getAction() == KeyEvent.ACTION_DOWN) {
                    SearchableInfo.ActionKeyInfo actionKey = mSearchable.findActionKey(keyCode);
                    if ((actionKey != null) && (actionKey.getQueryActionMsg() != null)) {
                        launchQuerySearch(keyCode, actionKey.getQueryActionMsg(), mSearchSrcTextView
                                .getText().toString());
                        return true;
                    }
                }
            }
            return false;
        }
    };

    
React to the user typing while in the suggestions list. First, check for
action keys. If not handled, try refocusing regular characters into the
EditText.
/**
     * React to the user typing while in the suggestions list. First, check for
     * action keys. If not handled, try refocusing regular characters into the
     * EditText.
     */
    private boolean onSuggestionsKey(View v, int keyCode, KeyEvent event) {
        // guard against possible race conditions (late arrival after dismiss)
        if (mSearchable == null) {
            return false;
        }
        if (mSuggestionsAdapter == null) {
            return false;
        }
        if (event.getAction() == KeyEvent.ACTION_DOWN && event.hasNoModifiers()) {
            // First, check for enter or search (both of which we'll treat as a
            // "click")
            if (keyCode == KeyEvent.KEYCODE_ENTER || keyCode == KeyEvent.KEYCODE_SEARCH
                    || keyCode == KeyEvent.KEYCODE_TAB) {
                int position = mSearchSrcTextView.getListSelection();
                return onItemClicked(position, KeyEvent.KEYCODE_UNKNOWN, null);
            }

            // Next, check for left/right moves, which we use to "return" the
            // user to the edit view
            if (keyCode == KeyEvent.KEYCODE_DPAD_LEFT || keyCode == KeyEvent.KEYCODE_DPAD_RIGHT) {
                // give "focus" to text editor, with cursor at the beginning if
                // left key, at end if right key
                // TODO: Reverse left/right for right-to-left languages, e.g.
                // Arabic
                int selPoint = (keyCode == KeyEvent.KEYCODE_DPAD_LEFT) ? 0 : mSearchSrcTextView
                        .length();
                mSearchSrcTextView.setSelection(selPoint);
                mSearchSrcTextView.setListSelection(0);
                mSearchSrcTextView.clearListSelection();
                mSearchSrcTextView.ensureImeVisible(true);

                return true;
            }

            // Next, check for an "up and out" move
            if (keyCode == KeyEvent.KEYCODE_DPAD_UP && 0 == mSearchSrcTextView.getListSelection()) {
                // TODO: restoreUserQuery();
                // let ACTV complete the move
                return false;
            }

            // Next, check for an "action key"
            SearchableInfo.ActionKeyInfo actionKey = mSearchable.findActionKey(keyCode);
            if ((actionKey != null)
                    && ((actionKey.getSuggestActionMsg() != null) || (actionKey
                            .getSuggestActionMsgColumn() != null))) {
                // launch suggestion using action key column
                int position = mSearchSrcTextView.getListSelection();
                if (position != ListView.INVALID_POSITION) {
                    Cursor c = mSuggestionsAdapter.getCursor();
                    if (c.moveToPosition(position)) {
                        final String actionMsg = getActionKeyMessage(c, actionKey);
                        if (actionMsg != null && (actionMsg.length() > 0)) {
                            return onItemClicked(position, keyCode, actionMsg);
                        }
                    }
                }
            }
        }
        return false;
    }

    
For a given suggestion and a given cursor row, get the action message. If
not provided by the specific row/column, also check for a single
definition (for the action key).
Params:
c – The cursor providing suggestions
actionKey – The actionkey record being examined
Returns:
Returns a string, or null if no action key message for this
        suggestion/**
     * For a given suggestion and a given cursor row, get the action message. If
     * not provided by the specific row/column, also check for a single
     * definition (for the action key).
     *
     * @param c The cursor providing suggestions
     * @param actionKey The actionkey record being examined
     *
     * @return Returns a string, or null if no action key message for this
     *         suggestion
     */
    private static String getActionKeyMessage(Cursor c, SearchableInfo.ActionKeyInfo actionKey) {
        String result = null;
        // check first in the cursor data, for a suggestion-specific message
        final String column = actionKey.getSuggestActionMsgColumn();
        if (column != null) {
            result = SuggestionsAdapter.getColumnString(c, column);
        }
        // If the cursor didn't give us a message, see if there's a single
        // message defined
        // for the actionkey (for all suggestions)
        if (result == null) {
            result = actionKey.getSuggestActionMsg();
        }
        return result;
    }

    private CharSequence getDecoratedHint(CharSequence hintText) {
        // If the field is always expanded or we don't have a search hint icon,
        // then don't add the search icon to the hint.
        if (!mIconifiedByDefault || mSearchHintIcon == null) {
            return hintText;
        }

        final int textSize = (int) (mSearchSrcTextView.getTextSize() * 1.25);
        mSearchHintIcon.setBounds(0, 0, textSize, textSize);

        final SpannableStringBuilder ssb = new SpannableStringBuilder("   ");
        ssb.setSpan(new ImageSpan(mSearchHintIcon), 1, 2, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        ssb.append(hintText);
        return ssb;
    }

    private void updateQueryHint() {
        final CharSequence hint = getQueryHint();
        mSearchSrcTextView.setHint(getDecoratedHint(hint == null ? "" : hint));
    }

    
Updates the auto-complete text view.
/**
     * Updates the auto-complete text view.
     */
    private void updateSearchAutoComplete() {
        mSearchSrcTextView.setDropDownAnimationStyle(0); // no animation
        mSearchSrcTextView.setThreshold(mSearchable.getSuggestThreshold());
        mSearchSrcTextView.setImeOptions(mSearchable.getImeOptions());
        int inputType = mSearchable.getInputType();
        // We only touch this if the input type is set up for text (which it almost certainly
        // should be, in the case of search!)
        if ((inputType & InputType.TYPE_MASK_CLASS) == InputType.TYPE_CLASS_TEXT) {
            // The existence of a suggestions authority is the proxy for "suggestions
            // are available here"
            inputType &= ~InputType.TYPE_TEXT_FLAG_AUTO_COMPLETE;
            if (mSearchable.getSuggestAuthority() != null) {
                inputType |= InputType.TYPE_TEXT_FLAG_AUTO_COMPLETE;
                // TYPE_TEXT_FLAG_AUTO_COMPLETE means that the text editor is performing
                // auto-completion based on its own semantics, which it will present to the user
                // as they type. This generally means that the input method should not show its
                // own candidates, and the spell checker should not be in action. The text editor
                // supplies its candidates by calling InputMethodManager.displayCompletions(),
                // which in turn will call InputMethodSession.displayCompletions().
                inputType |= InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS;
            }
        }
        mSearchSrcTextView.setInputType(inputType);
        if (mSuggestionsAdapter != null) {
            mSuggestionsAdapter.changeCursor(null);
        }
        // attach the suggestions adapter, if suggestions are available
        // The existence of a suggestions authority is the proxy for "suggestions available here"
        if (mSearchable.getSuggestAuthority() != null) {
            mSuggestionsAdapter = new SuggestionsAdapter(getContext(),
                    this, mSearchable, mOutsideDrawablesCache);
            mSearchSrcTextView.setAdapter(mSuggestionsAdapter);
            ((SuggestionsAdapter) mSuggestionsAdapter).setQueryRefinement(
                    mQueryRefinement ? SuggestionsAdapter.REFINE_ALL
                    : SuggestionsAdapter.REFINE_BY_ENTRY);
        }
    }

    
Update the visibility of the voice button.  There are actually two voice search modes,
either of which will activate the button.
Params:
empty – whether the search query text field is empty. If it is, then the other
criteria apply to make the voice button visible./**
     * Update the visibility of the voice button.  There are actually two voice search modes,
     * either of which will activate the button.
     * @param empty whether the search query text field is empty. If it is, then the other
     * criteria apply to make the voice button visible.
     */
    private void updateVoiceButton(boolean empty) {
        int visibility = GONE;
        if (mVoiceButtonEnabled && !isIconified() && empty) {
            visibility = VISIBLE;
            mGoButton.setVisibility(GONE);
        }
        mVoiceButton.setVisibility(visibility);
    }

    private final OnEditorActionListener mOnEditorActionListener = new OnEditorActionListener() {

        
Called when the input method default action key is pressed.
/**
         * Called when the input method default action key is pressed.
         */
        public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
            onSubmitQuery();
            return true;
        }
    };

    private void onTextChanged(CharSequence newText) {
        CharSequence text = mSearchSrcTextView.getText();
        mUserQuery = text;
        boolean hasText = !TextUtils.isEmpty(text);
        updateSubmitButton(hasText);
        updateVoiceButton(!hasText);
        updateCloseButton();
        updateSubmitArea();
        if (mOnQueryChangeListener != null && !TextUtils.equals(newText, mOldQueryText)) {
            mOnQueryChangeListener.onQueryTextChange(newText.toString());
        }
        mOldQueryText = newText.toString();
    }

    private void onSubmitQuery() {
        CharSequence query = mSearchSrcTextView.getText();
        if (query != null && TextUtils.getTrimmedLength(query) > 0) {
            if (mOnQueryChangeListener == null
                    || !mOnQueryChangeListener.onQueryTextSubmit(query.toString())) {
                if (mSearchable != null) {
                    launchQuerySearch(KeyEvent.KEYCODE_UNKNOWN, null, query.toString());
                }
                mSearchSrcTextView.setImeVisibility(false);
                dismissSuggestions();
            }
        }
    }

    private void dismissSuggestions() {
        mSearchSrcTextView.dismissDropDown();
    }

    private void onCloseClicked() {
        CharSequence text = mSearchSrcTextView.getText();
        if (TextUtils.isEmpty(text)) {
            if (mIconifiedByDefault) {
                // If the app doesn't override the close behavior
                if (mOnCloseListener == null || !mOnCloseListener.onClose()) {
                    // hide the keyboard and remove focus
                    clearFocus();
                    // collapse the search field
                    updateViewsVisibility(true);
                }
            }
        } else {
            mSearchSrcTextView.setText("");
            mSearchSrcTextView.requestFocus();
            mSearchSrcTextView.setImeVisibility(true);
        }

    }

    private void onSearchClicked() {
        updateViewsVisibility(false);
        mSearchSrcTextView.requestFocus();
        mSearchSrcTextView.setImeVisibility(true);
        if (mOnSearchClickListener != null) {
            mOnSearchClickListener.onClick(this);
        }
    }

    private void onVoiceClicked() {
        // guard against possible race conditions
        if (mSearchable == null) {
            return;
        }
        SearchableInfo searchable = mSearchable;
        try {
            if (searchable.getVoiceSearchLaunchWebSearch()) {
                Intent webSearchIntent = createVoiceWebSearchIntent(mVoiceWebSearchIntent,
                        searchable);
                getContext().startActivity(webSearchIntent);
            } else if (searchable.getVoiceSearchLaunchRecognizer()) {
                Intent appSearchIntent = createVoiceAppSearchIntent(mVoiceAppSearchIntent,
                        searchable);
                getContext().startActivity(appSearchIntent);
            }
        } catch (ActivityNotFoundException e) {
            // Should not happen, since we check the availability of
            // voice search before showing the button. But just in case...
            Log.w(LOG_TAG, "Could not find voice search activity");
        }
    }

    void onTextFocusChanged() {
        updateViewsVisibility(isIconified());
        // Delayed update to make sure that the focus has settled down and window focus changes
        // don't affect it. A synchronous update was not working.
        postUpdateFocusedState();
        if (mSearchSrcTextView.hasFocus()) {
            forceSuggestionQuery();
        }
    }

    @Override
    public void onWindowFocusChanged(boolean hasWindowFocus) {
        super.onWindowFocusChanged(hasWindowFocus);

        postUpdateFocusedState();
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    @Override
    public void onActionViewCollapsed() {
        setQuery("", false);
        clearFocus();
        updateViewsVisibility(true);
        mSearchSrcTextView.setImeOptions(mCollapsedImeOptions);
        mExpandedInActionView = false;
    }

    
{@inheritDoc}
/**
     * {@inheritDoc}
     */
    @Override
    public void onActionViewExpanded() {
        if (mExpandedInActionView) return;

        mExpandedInActionView = true;
        mCollapsedImeOptions = mSearchSrcTextView.getImeOptions();
        mSearchSrcTextView.setImeOptions(mCollapsedImeOptions | EditorInfo.IME_FLAG_NO_FULLSCREEN);
        mSearchSrcTextView.setText("");
        setIconified(false);
    }

    static class SavedState extends BaseSavedState {
        boolean isIconified;

        SavedState(Parcelable superState) {
            super(superState);
        }

        public SavedState(Parcel source) {
            super(source);
            isIconified = (Boolean) source.readValue(null);
        }

        @Override
        public void writeToParcel(Parcel dest, int flags) {
            super.writeToParcel(dest, flags);
            dest.writeValue(isIconified);
        }

        @Override
        public String toString() {
            return "SearchView.SavedState{"
                    + Integer.toHexString(System.identityHashCode(this))
                    + " isIconified=" + isIconified + "}";
        }

        public static final Parcelable.Creator<SavedState> CREATOR =
                new Parcelable.Creator<SavedState>() {
                    public SavedState createFromParcel(Parcel in) {
                        return new SavedState(in);
                    }

                    public SavedState[] newArray(int size) {
                        return new SavedState[size];
                    }
                };
    }

    @Override
    protected Parcelable onSaveInstanceState() {
        Parcelable superState = super.onSaveInstanceState();
        SavedState ss = new SavedState(superState);
        ss.isIconified = isIconified();
        return ss;
    }

    @Override
    protected void onRestoreInstanceState(Parcelable state) {
        SavedState ss = (SavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());
        updateViewsVisibility(ss.isIconified);
        requestLayout();
    }

    @Override
    public CharSequence getAccessibilityClassName() {
        return SearchView.class.getName();
    }

    private void adjustDropDownSizeAndPosition() {
        if (mDropDownAnchor.getWidth() > 1) {
            Resources res = getContext().getResources();
            int anchorPadding = mSearchPlate.getPaddingLeft();
            Rect dropDownPadding = new Rect();
            final boolean isLayoutRtl = isLayoutRtl();
            int iconOffset = mIconifiedByDefault
                    ? res.getDimensionPixelSize(R.dimen.dropdownitem_icon_width)
                    + res.getDimensionPixelSize(R.dimen.dropdownitem_text_padding_left)
                    : 0;
            mSearchSrcTextView.getDropDownBackground().getPadding(dropDownPadding);
            int offset;
            if (isLayoutRtl) {
                offset = - dropDownPadding.left;
            } else {
                offset = anchorPadding - (dropDownPadding.left + iconOffset);
            }
            mSearchSrcTextView.setDropDownHorizontalOffset(offset);
            final int width = mDropDownAnchor.getWidth() + dropDownPadding.left
                    + dropDownPadding.right + iconOffset - anchorPadding;
            mSearchSrcTextView.setDropDownWidth(width);
        }
    }

    private boolean onItemClicked(int position, int actionKey, String actionMsg) {
        if (mOnSuggestionListener == null
                || !mOnSuggestionListener.onSuggestionClick(position)) {
            launchSuggestion(position, KeyEvent.KEYCODE_UNKNOWN, null);
            mSearchSrcTextView.setImeVisibility(false);
            dismissSuggestions();
            return true;
        }
        return false;
    }

    private boolean onItemSelected(int position) {
        if (mOnSuggestionListener == null
                || !mOnSuggestionListener.onSuggestionSelect(position)) {
            rewriteQueryFromSuggestion(position);
            return true;
        }
        return false;
    }

    private final OnItemClickListener mOnItemClickListener = new OnItemClickListener() {

        
Implements OnItemClickListener
/**
         * Implements OnItemClickListener
         */
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            if (DBG) Log.d(LOG_TAG, "onItemClick() position " + position);
            onItemClicked(position, KeyEvent.KEYCODE_UNKNOWN, null);
        }
    };

    private final OnItemSelectedListener mOnItemSelectedListener = new OnItemSelectedListener() {

        
Implements OnItemSelectedListener
/**
         * Implements OnItemSelectedListener
         */
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            if (DBG) Log.d(LOG_TAG, "onItemSelected() position " + position);
            SearchView.this.onItemSelected(position);
        }

        
Implements OnItemSelectedListener
/**
         * Implements OnItemSelectedListener
         */
        public void onNothingSelected(AdapterView<?> parent) {
            if (DBG)
                Log.d(LOG_TAG, "onNothingSelected()");
        }
    };

    
Query rewriting.
/**
     * Query rewriting.
     */
    private void rewriteQueryFromSuggestion(int position) {
        CharSequence oldQuery = mSearchSrcTextView.getText();
        Cursor c = mSuggestionsAdapter.getCursor();
        if (c == null) {
            return;
        }
        if (c.moveToPosition(position)) {
            // Get the new query from the suggestion.
            CharSequence newQuery = mSuggestionsAdapter.convertToString(c);
            if (newQuery != null) {
                // The suggestion rewrites the query.
                // Update the text field, without getting new suggestions.
                setQuery(newQuery);
            } else {
                // The suggestion does not rewrite the query, restore the user's query.
                setQuery(oldQuery);
            }
        } else {
            // We got a bad position, restore the user's query.
            setQuery(oldQuery);
        }
    }

    
Launches an intent based on a suggestion.
Params:
position – The index of the suggestion to create the intent from.
actionKey – The key code of the action key that was pressed, or KeyEvent.KEYCODE_UNKNOWN if none.
actionMsg – The message for the action key that was pressed,
       or null if none.
Returns:
true if a successful launch, false if could not (e.g. bad position)./**
     * Launches an intent based on a suggestion.
     *
     * @param position The index of the suggestion to create the intent from.
     * @param actionKey The key code of the action key that was pressed,
     *        or {@link KeyEvent#KEYCODE_UNKNOWN} if none.
     * @param actionMsg The message for the action key that was pressed,
     *        or <code>null</code> if none.
     * @return true if a successful launch, false if could not (e.g. bad position).
     */
    private boolean launchSuggestion(int position, int actionKey, String actionMsg) {
        Cursor c = mSuggestionsAdapter.getCursor();
        if ((c != null) && c.moveToPosition(position)) {

            Intent intent = createIntentFromSuggestion(c, actionKey, actionMsg);

            // launch the intent
            launchIntent(intent);

            return true;
        }
        return false;
    }

    
Launches an intent, including any special intent handling.
/**
     * Launches an intent, including any special intent handling.
     */
    private void launchIntent(Intent intent) {
        if (intent == null) {
            return;
        }
        try {
            // If the intent was created from a suggestion, it will always have an explicit
            // component here.
            getContext().startActivity(intent);
        } catch (RuntimeException ex) {
            Log.e(LOG_TAG, "Failed launch activity: " + intent, ex);
        }
    }

    
Sets the text in the query box, without updating the suggestions.
/**
     * Sets the text in the query box, without updating the suggestions.
     */
    private void setQuery(CharSequence query) {
        mSearchSrcTextView.setText(query, true);
        // Move the cursor to the end
        mSearchSrcTextView.setSelection(TextUtils.isEmpty(query) ? 0 : query.length());
    }

    private void launchQuerySearch(int actionKey, String actionMsg, String query) {
        String action = Intent.ACTION_SEARCH;
        Intent intent = createIntent(action, null, null, query, actionKey, actionMsg);
        getContext().startActivity(intent);
    }

    
Constructs an intent from the given information and the search dialog state.
Params:
action – Intent action.
data – Intent data, or null.
extraData – Data for SearchManager.EXTRA_DATA_KEY or null.
query – Intent query, or null.
actionKey – The key code of the action key that was pressed, or KeyEvent.KEYCODE_UNKNOWN if none.
actionMsg – The message for the action key that was pressed,
       or null if none.
mode – The search mode, one of the acceptable values for SearchManager.SEARCH_MODE, or null.
Returns:
The intent./**
     * Constructs an intent from the given information and the search dialog state.
     *
     * @param action Intent action.
     * @param data Intent data, or <code>null</code>.
     * @param extraData Data for {@link SearchManager#EXTRA_DATA_KEY} or <code>null</code>.
     * @param query Intent query, or <code>null</code>.
     * @param actionKey The key code of the action key that was pressed,
     *        or {@link KeyEvent#KEYCODE_UNKNOWN} if none.
     * @param actionMsg The message for the action key that was pressed,
     *        or <code>null</code> if none.
     * @param mode The search mode, one of the acceptable values for
     *             {@link SearchManager#SEARCH_MODE}, or {@code null}.
     * @return The intent.
     */
    private Intent createIntent(String action, Uri data, String extraData, String query,
            int actionKey, String actionMsg) {
        // Now build the Intent
        Intent intent = new Intent(action);
        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        // We need CLEAR_TOP to avoid reusing an old task that has other activities
        // on top of the one we want. We don't want to do this in in-app search though,
        // as it can be destructive to the activity stack.
        if (data != null) {
            intent.setData(data);
        }
        intent.putExtra(SearchManager.USER_QUERY, mUserQuery);
        if (query != null) {
            intent.putExtra(SearchManager.QUERY, query);
        }
        if (extraData != null) {
            intent.putExtra(SearchManager.EXTRA_DATA_KEY, extraData);
        }
        if (mAppSearchData != null) {
            intent.putExtra(SearchManager.APP_DATA, mAppSearchData);
        }
        if (actionKey != KeyEvent.KEYCODE_UNKNOWN) {
            intent.putExtra(SearchManager.ACTION_KEY, actionKey);
            intent.putExtra(SearchManager.ACTION_MSG, actionMsg);
        }
        intent.setComponent(mSearchable.getSearchActivity());
        return intent;
    }

    
Create and return an Intent that can launch the voice search activity for web search.
/**
     * Create and return an Intent that can launch the voice search activity for web search.
     */
    private Intent createVoiceWebSearchIntent(Intent baseIntent, SearchableInfo searchable) {
        Intent voiceIntent = new Intent(baseIntent);
        ComponentName searchActivity = searchable.getSearchActivity();
        voiceIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, searchActivity == null ? null
                : searchActivity.flattenToShortString());
        return voiceIntent;
    }

    
Create and return an Intent that can launch the voice search activity, perform a specific
voice transcription, and forward the results to the searchable activity.
Params:
baseIntent – The voice app search intent to start from
Returns:
A completely-configured intent ready to send to the voice search activity/**
     * Create and return an Intent that can launch the voice search activity, perform a specific
     * voice transcription, and forward the results to the searchable activity.
     *
     * @param baseIntent The voice app search intent to start from
     * @return A completely-configured intent ready to send to the voice search activity
     */
    private Intent createVoiceAppSearchIntent(Intent baseIntent, SearchableInfo searchable) {
        ComponentName searchActivity = searchable.getSearchActivity();

        // create the necessary intent to set up a search-and-forward operation
        // in the voice search system.   We have to keep the bundle separate,
        // because it becomes immutable once it enters the PendingIntent
        Intent queryIntent = new Intent(Intent.ACTION_SEARCH);
        queryIntent.setComponent(searchActivity);
        PendingIntent pending = PendingIntent.getActivity(getContext(), 0, queryIntent,
                PendingIntent.FLAG_ONE_SHOT);

        // Now set up the bundle that will be inserted into the pending intent
        // when it's time to do the search.  We always build it here (even if empty)
        // because the voice search activity will always need to insert "QUERY" into
        // it anyway.
        Bundle queryExtras = new Bundle();
        if (mAppSearchData != null) {
            queryExtras.putParcelable(SearchManager.APP_DATA, mAppSearchData);
        }

        // Now build the intent to launch the voice search.  Add all necessary
        // extras to launch the voice recognizer, and then all the necessary extras
        // to forward the results to the searchable activity
        Intent voiceIntent = new Intent(baseIntent);

        // Add all of the configuration options supplied by the searchable's metadata
        String languageModel = RecognizerIntent.LANGUAGE_MODEL_FREE_FORM;
        String prompt = null;
        String language = null;
        int maxResults = 1;

        Resources resources = getResources();
        if (searchable.getVoiceLanguageModeId() != 0) {
            languageModel = resources.getString(searchable.getVoiceLanguageModeId());
        }
        if (searchable.getVoicePromptTextId() != 0) {
            prompt = resources.getString(searchable.getVoicePromptTextId());
        }
        if (searchable.getVoiceLanguageId() != 0) {
            language = resources.getString(searchable.getVoiceLanguageId());
        }
        if (searchable.getVoiceMaxResults() != 0) {
            maxResults = searchable.getVoiceMaxResults();
        }
        voiceIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, languageModel);
        voiceIntent.putExtra(RecognizerIntent.EXTRA_PROMPT, prompt);
        voiceIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, language);
        voiceIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, maxResults);
        voiceIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, searchActivity == null ? null
                : searchActivity.flattenToShortString());

        // Add the values that configure forwarding the results
        voiceIntent.putExtra(RecognizerIntent.EXTRA_RESULTS_PENDINGINTENT, pending);
        voiceIntent.putExtra(RecognizerIntent.EXTRA_RESULTS_PENDINGINTENT_BUNDLE, queryExtras);

        return voiceIntent;
    }

    
When a particular suggestion has been selected, perform the various lookups required
to use the suggestion.  This includes checking the cursor for suggestion-specific data,
and/or falling back to the XML for defaults;  It also creates REST style Uri data when
the suggestion includes a data id.
Params:
c – The suggestions cursor, moved to the row of the user's selection
actionKey – The key code of the action key that was pressed, or KeyEvent.KEYCODE_UNKNOWN if none.
actionMsg – The message for the action key that was pressed,
       or null if none.
Returns:
An intent for the suggestion at the cursor's position./**
     * When a particular suggestion has been selected, perform the various lookups required
     * to use the suggestion.  This includes checking the cursor for suggestion-specific data,
     * and/or falling back to the XML for defaults;  It also creates REST style Uri data when
     * the suggestion includes a data id.
     *
     * @param c The suggestions cursor, moved to the row of the user's selection
     * @param actionKey The key code of the action key that was pressed,
     *        or {@link KeyEvent#KEYCODE_UNKNOWN} if none.
     * @param actionMsg The message for the action key that was pressed,
     *        or <code>null</code> if none.
     * @return An intent for the suggestion at the cursor's position.
     */
    private Intent createIntentFromSuggestion(Cursor c, int actionKey, String actionMsg) {
        try {
            // use specific action if supplied, or default action if supplied, or fixed default
            String action = getColumnString(c, SearchManager.SUGGEST_COLUMN_INTENT_ACTION);

            if (action == null) {
                action = mSearchable.getSuggestIntentAction();
            }
            if (action == null) {
                action = Intent.ACTION_SEARCH;
            }

            // use specific data if supplied, or default data if supplied
            String data = getColumnString(c, SearchManager.SUGGEST_COLUMN_INTENT_DATA);
            if (data == null) {
                data = mSearchable.getSuggestIntentData();
            }
            // then, if an ID was provided, append it.
            if (data != null) {
                String id = getColumnString(c, SearchManager.SUGGEST_COLUMN_INTENT_DATA_ID);
                if (id != null) {
                    data = data + "/" + Uri.encode(id);
                }
            }
            Uri dataUri = (data == null) ? null : Uri.parse(data);

            String query = getColumnString(c, SearchManager.SUGGEST_COLUMN_QUERY);
            String extraData = getColumnString(c, SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA);

            return createIntent(action, dataUri, extraData, query, actionKey, actionMsg);
        } catch (RuntimeException e ) {
            int rowNum;
            try {                       // be really paranoid now
                rowNum = c.getPosition();
            } catch (RuntimeException e2 ) {
                rowNum = -1;
            }
            Log.w(LOG_TAG, "Search suggestions cursor at row " + rowNum +
                            " returned exception.", e);
            return null;
        }
    }

    private void forceSuggestionQuery() {
        mSearchSrcTextView.doBeforeTextChanged();
        mSearchSrcTextView.doAfterTextChanged();
    }

    static boolean isLandscapeMode(Context context) {
        return context.getResources().getConfiguration().orientation
                == Configuration.ORIENTATION_LANDSCAPE;
    }

    
Callback to watch the text field for empty/non-empty
/**
     * Callback to watch the text field for empty/non-empty
     */
    private TextWatcher mTextWatcher = new TextWatcher() {

        public void beforeTextChanged(CharSequence s, int start, int before, int after) { }

        public void onTextChanged(CharSequence s, int start,
                int before, int after) {
            SearchView.this.onTextChanged(s);
        }

        public void afterTextChanged(Editable s) {
        }
    };

    private static class UpdatableTouchDelegate extends TouchDelegate {
        
View that should receive forwarded touch events
/**
         * View that should receive forwarded touch events
         */
        private final View mDelegateView;

        
Bounds in local coordinates of the containing view that should be mapped to the delegate
view. This rect is used for initial hit testing.
/**
         * Bounds in local coordinates of the containing view that should be mapped to the delegate
         * view. This rect is used for initial hit testing.
         */
        private final Rect mTargetBounds;

        
Bounds in local coordinates of the containing view that are actual bounds of the delegate
view. This rect is used for event coordinate mapping.
/**
         * Bounds in local coordinates of the containing view that are actual bounds of the delegate
         * view. This rect is used for event coordinate mapping.
         */
        private final Rect mActualBounds;

        
mTargetBounds inflated to include some slop. This rect is to track whether the motion events
should be considered to be be within the delegate view.
/**
         * mTargetBounds inflated to include some slop. This rect is to track whether the motion events
         * should be considered to be be within the delegate view.
         */
        private final Rect mSlopBounds;

        private final int mSlop;

        
True if the delegate had been targeted on a down event (intersected mTargetBounds).
/**
         * True if the delegate had been targeted on a down event (intersected mTargetBounds).
         */
        private boolean mDelegateTargeted;

        public UpdatableTouchDelegate(Rect targetBounds, Rect actualBounds, View delegateView) {
            super(targetBounds, delegateView);
            mSlop = ViewConfiguration.get(delegateView.getContext()).getScaledTouchSlop();
            mTargetBounds = new Rect();
            mSlopBounds = new Rect();
            mActualBounds = new Rect();
            setBounds(targetBounds, actualBounds);
            mDelegateView = delegateView;
        }

        public void setBounds(Rect desiredBounds, Rect actualBounds) {
            mTargetBounds.set(desiredBounds);
            mSlopBounds.set(desiredBounds);
            mSlopBounds.inset(-mSlop, -mSlop);
            mActualBounds.set(actualBounds);
        }

        @Override
        public boolean onTouchEvent(MotionEvent event) {
            final int x = (int) event.getX();
            final int y = (int) event.getY();
            boolean sendToDelegate = false;
            boolean hit = true;
            boolean handled = false;

            switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    if (mTargetBounds.contains(x, y)) {
                        mDelegateTargeted = true;
                        sendToDelegate = true;
                    }
                    break;
                case MotionEvent.ACTION_UP:
                case MotionEvent.ACTION_MOVE:
                    sendToDelegate = mDelegateTargeted;
                    if (sendToDelegate) {
                        if (!mSlopBounds.contains(x, y)) {
                            hit = false;
                        }
                    }
                    break;
                case MotionEvent.ACTION_CANCEL:
                    sendToDelegate = mDelegateTargeted;
                    mDelegateTargeted = false;
                    break;
            }
            if (sendToDelegate) {
                if (hit && !mActualBounds.contains(x, y)) {
                    // Offset event coordinates to be in the center of the target view since we
                    // are within the targetBounds, but not inside the actual bounds of
                    // mDelegateView
                    event.setLocation(mDelegateView.getWidth() / 2,
                            mDelegateView.getHeight() / 2);
                } else {
                    // Offset event coordinates to the target view coordinates.
                    event.setLocation(x - mActualBounds.left, y - mActualBounds.top);
                }

                handled = mDelegateView.dispatchTouchEvent(event);
            }
            return handled;
        }
    }

    
Local subclass for AutoCompleteTextView.
@hide
/**
     * Local subclass for AutoCompleteTextView.
     * @hide
     */
    public static class SearchAutoComplete extends AutoCompleteTextView {

        private int mThreshold;
        private SearchView mSearchView;

        private boolean mHasPendingShowSoftInputRequest;
        final Runnable mRunShowSoftInputIfNecessary = () -> showSoftInputIfNecessary();

        public SearchAutoComplete(Context context) {
            super(context);
            mThreshold = getThreshold();
        }

        public SearchAutoComplete(Context context, AttributeSet attrs) {
            super(context, attrs);
            mThreshold = getThreshold();
        }

        public SearchAutoComplete(Context context, AttributeSet attrs, int defStyleAttrs) {
            super(context, attrs, defStyleAttrs);
            mThreshold = getThreshold();
        }

        public SearchAutoComplete(
                Context context, AttributeSet attrs, int defStyleAttrs, int defStyleRes) {
            super(context, attrs, defStyleAttrs, defStyleRes);
            mThreshold = getThreshold();
        }

        @Override
        protected void onFinishInflate() {
            super.onFinishInflate();
            DisplayMetrics metrics = getResources().getDisplayMetrics();
            setMinWidth((int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                    getSearchViewTextMinWidthDp(), metrics));
        }

        void setSearchView(SearchView searchView) {
            mSearchView = searchView;
        }

        @Override
        public void setThreshold(int threshold) {
            super.setThreshold(threshold);
            mThreshold = threshold;
        }

        
Returns true if the text field is empty, or contains only whitespace.
/**
         * Returns true if the text field is empty, or contains only whitespace.
         */
        private boolean isEmpty() {
            return TextUtils.getTrimmedLength(getText()) == 0;
        }

        
We override this method to avoid replacing the query box text when a
suggestion is clicked.
/**
         * We override this method to avoid replacing the query box text when a
         * suggestion is clicked.
         */
        @Override
        protected void replaceText(CharSequence text) {
        }

        
We override this method to avoid an extra onItemClick being called on the drop-down's OnItemClickListener by AutoCompleteTextView.onKeyUp(int, KeyEvent) when an item is clicked with the trackball. /**
         * We override this method to avoid an extra onItemClick being called on
         * the drop-down's OnItemClickListener by
         * {@link AutoCompleteTextView#onKeyUp(int, KeyEvent)} when an item is
         * clicked with the trackball.
         */
        @Override
        public void performCompletion() {
        }

        
We override this method to be sure and show the soft keyboard if
appropriate when the TextView has focus.
/**
         * We override this method to be sure and show the soft keyboard if
         * appropriate when the TextView has focus.
         */
        @Override
        public void onWindowFocusChanged(boolean hasWindowFocus) {
            super.onWindowFocusChanged(hasWindowFocus);

            if (hasWindowFocus && mSearchView.hasFocus() && getVisibility() == VISIBLE) {
                // Since InputMethodManager#onPostWindowFocus() will be called after this callback,
                // it is a bit too early to call InputMethodManager#showSoftInput() here. We still
                // need to wait until the system calls back onCreateInputConnection() to call
                // InputMethodManager#showSoftInput().
                mHasPendingShowSoftInputRequest = true;

                // If in landscape mode, then make sure that the ime is in front of the dropdown.
                if (isLandscapeMode(getContext())) {
                    ensureImeVisible(true);
                }
            }
        }

        @Override
        protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
            super.onFocusChanged(focused, direction, previouslyFocusedRect);
            mSearchView.onTextFocusChanged();
        }

        
We override this method so that we can allow a threshold of zero,
which ACTV does not.
/**
         * We override this method so that we can allow a threshold of zero,
         * which ACTV does not.
         */
        @Override
        public boolean enoughToFilter() {
            return mThreshold <= 0 || super.enoughToFilter();
        }

        @Override
        public boolean onKeyPreIme(int keyCode, KeyEvent event) {
            final boolean consume = super.onKeyPreIme(keyCode, event);
            if (consume && keyCode == KeyEvent.KEYCODE_BACK
                    && event.getAction() == KeyEvent.ACTION_UP) {
                // If AutoCompleteTextView closed its pop-up, it will return true, in which case
                // we should also close the IME. Otherwise, the popup is already closed and we can
                // leave the BACK event alone.
                setImeVisibility(false);
            }
            return consume;
        }

        
Get minimum width of the search view text entry area.
/**
         * Get minimum width of the search view text entry area.
         */
        private int getSearchViewTextMinWidthDp() {
            final Configuration configuration = getResources().getConfiguration();
            final int width = configuration.screenWidthDp;
            final int height = configuration.screenHeightDp;
            final int orientation = configuration.orientation;
            if (width >= 960 && height >= 720
                    && orientation == Configuration.ORIENTATION_LANDSCAPE) {
                return 256;
            } else if (width >= 600 || (width >= 640 && height >= 480)) {
                return 192;
            };
            return 160;
        }

        
We override View.onCreateInputConnection(EditorInfo) as a signal to schedule a pending InputMethodManager.showSoftInput(View, int) request (if any). /**
         * We override {@link View#onCreateInputConnection(EditorInfo)} as a signal to schedule a
         * pending {@link InputMethodManager#showSoftInput(View, int)} request (if any).
         */
        @Override
        public InputConnection onCreateInputConnection(EditorInfo editorInfo) {
            final InputConnection ic = super.onCreateInputConnection(editorInfo);
            if (mHasPendingShowSoftInputRequest) {
                removeCallbacks(mRunShowSoftInputIfNecessary);
                post(mRunShowSoftInputIfNecessary);
            }
            return ic;
        }

        private void showSoftInputIfNecessary() {
            if (mHasPendingShowSoftInputRequest) {
                final InputMethodManager imm =
                        getContext().getSystemService(InputMethodManager.class);
                imm.showSoftInput(this, 0);
                mHasPendingShowSoftInputRequest = false;
            }
        }

        private void setImeVisibility(final boolean visible) {
            final InputMethodManager imm = getContext().getSystemService(InputMethodManager.class);
            if (!visible) {
                mHasPendingShowSoftInputRequest = false;
                removeCallbacks(mRunShowSoftInputIfNecessary);
                imm.hideSoftInputFromWindow(getWindowToken(), 0);
                return;
            }

            if (imm.isActive(this)) {
                // This means that SearchAutoComplete is already connected to the IME.
                // InputMethodManager#showSoftInput() is guaranteed to pass client-side focus check.
                mHasPendingShowSoftInputRequest = false;
                removeCallbacks(mRunShowSoftInputIfNecessary);
                imm.showSoftInput(this, 0);
                return;
            }

            // Otherwise, InputMethodManager#showSoftInput() should be deferred after
            // onCreateInputConnection().
            mHasPendingShowSoftInputRequest = true;
        }
    }
}