/*
 * Copyright (C) 2008 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 com.android.keyguard;

import static android.app.WindowConfiguration.ACTIVITY_TYPE_ASSISTANT;
import static android.app.WindowConfiguration.WINDOWING_MODE_UNDEFINED;
import static android.content.Intent.ACTION_USER_UNLOCKED;
import static android.os.BatteryManager.BATTERY_HEALTH_UNKNOWN;
import static android.os.BatteryManager.BATTERY_STATUS_FULL;
import static android.os.BatteryManager.BATTERY_STATUS_UNKNOWN;
import static android.os.BatteryManager.EXTRA_HEALTH;
import static android.os.BatteryManager.EXTRA_LEVEL;
import static android.os.BatteryManager.EXTRA_MAX_CHARGING_CURRENT;
import static android.os.BatteryManager.EXTRA_MAX_CHARGING_VOLTAGE;
import static android.os.BatteryManager.EXTRA_PLUGGED;
import static android.os.BatteryManager.EXTRA_STATUS;

import android.annotation.AnyThread;
import android.annotation.MainThread;
import android.app.ActivityManager;
import android.app.AlarmManager;
import android.app.Instrumentation;
import android.app.PendingIntent;
import android.app.UserSwitchObserver;
import android.app.admin.DevicePolicyManager;
import android.app.trust.TrustManager;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.IPackageManager;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.database.ContentObserver;
import android.hardware.fingerprint.FingerprintManager;
import android.hardware.fingerprint.FingerprintManager.AuthenticationCallback;
import android.hardware.fingerprint.FingerprintManager.AuthenticationResult;
import android.media.AudioManager;
import android.os.BatteryManager;
import android.os.CancellationSignal;
import android.os.Handler;
import android.os.IRemoteCallback;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.Trace;
import android.os.UserHandle;
import android.os.UserManager;
import android.provider.Settings;
import android.service.dreams.DreamService;
import android.service.dreams.IDreamManager;
import android.telephony.ServiceState;
import android.telephony.SubscriptionInfo;
import android.telephony.SubscriptionManager;
import android.telephony.SubscriptionManager.OnSubscriptionsChangedListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.util.Slog;
import android.util.SparseBooleanArray;
import android.util.SparseIntArray;

import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.telephony.IccCardConstants;
import com.android.internal.telephony.IccCardConstants.State;
import com.android.internal.telephony.PhoneConstants;
import com.android.internal.telephony.TelephonyIntents;
import com.android.internal.util.Preconditions;
import com.android.internal.widget.LockPatternUtils;
import com.android.settingslib.WirelessUtils;
import com.android.systemui.recents.misc.SysUiTaskStackChangeListener;
import com.android.systemui.shared.system.ActivityManagerWrapper;

import com.google.android.collect.Lists;

import java.io.FileDescriptor;
import java.io.PrintWriter;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map.Entry;

Watches for updates that may be interesting to the keyguard, and provides the up to date information as well as a registration for callbacks that care to be updated. Note: under time crunch, this has been extended to include some stuff that doesn't really belong here. see handleBatteryUpdate where it shutdowns the device, and getFailedUnlockAttempts(), reportFailedAttempt() and clearFailedUnlockAttempts(). Maybe we should rename this 'KeyguardContext'... /**
 * Watches for updates that may be interesting to the keyguard, and provides
 * the up to date information as well as a registration for callbacks that care
 * to be updated.
 *
 * Note: under time crunch, this has been extended to include some stuff that
 * doesn't really belong here.  see {@link #handleBatteryUpdate} where it shutdowns
 * the device, and {@link #getFailedUnlockAttempts()}, {@link #reportFailedAttempt()}
 * and {@link #clearFailedUnlockAttempts()}.  Maybe we should rename this 'KeyguardContext'...
 */
public class KeyguardUpdateMonitor implements TrustManager.TrustListener {

    private static final String TAG = "KeyguardUpdateMonitor";
    private static final boolean DEBUG = KeyguardConstants.DEBUG;
    private static final boolean DEBUG_SIM_STATES = KeyguardConstants.DEBUG_SIM_STATES;
    private static final int LOW_BATTERY_THRESHOLD = 20;

    private static final String ACTION_FACE_UNLOCK_STARTED
            = "com.android.facelock.FACE_UNLOCK_STARTED";
    private static final String ACTION_FACE_UNLOCK_STOPPED
            = "com.android.facelock.FACE_UNLOCK_STOPPED";

    // Callback messages
    private static final int MSG_TIME_UPDATE = 301;
    private static final int MSG_BATTERY_UPDATE = 302;
    private static final int MSG_SIM_STATE_CHANGE = 304;
    private static final int MSG_RINGER_MODE_CHANGED = 305;
    private static final int MSG_PHONE_STATE_CHANGED = 306;
    private static final int MSG_DEVICE_PROVISIONED = 308;
    private static final int MSG_DPM_STATE_CHANGED = 309;
    private static final int MSG_USER_SWITCHING = 310;
    private static final int MSG_KEYGUARD_RESET = 312;
    private static final int MSG_BOOT_COMPLETED = 313;
    private static final int MSG_USER_SWITCH_COMPLETE = 314;
    private static final int MSG_USER_INFO_CHANGED = 317;
    private static final int MSG_REPORT_EMERGENCY_CALL_ACTION = 318;
    private static final int MSG_STARTED_WAKING_UP = 319;
    private static final int MSG_FINISHED_GOING_TO_SLEEP = 320;
    private static final int MSG_STARTED_GOING_TO_SLEEP = 321;
    private static final int MSG_KEYGUARD_BOUNCER_CHANGED = 322;
    private static final int MSG_FACE_UNLOCK_STATE_CHANGED = 327;
    private static final int MSG_SIM_SUBSCRIPTION_INFO_CHANGED = 328;
    private static final int MSG_AIRPLANE_MODE_CHANGED = 329;
    private static final int MSG_SERVICE_STATE_CHANGE = 330;
    private static final int MSG_SCREEN_TURNED_ON = 331;
    private static final int MSG_SCREEN_TURNED_OFF = 332;
    private static final int MSG_DREAMING_STATE_CHANGED = 333;
    private static final int MSG_USER_UNLOCKED = 334;
    private static final int MSG_ASSISTANT_STACK_CHANGED = 335;
    private static final int MSG_FINGERPRINT_AUTHENTICATION_CONTINUE = 336;
    private static final int MSG_DEVICE_POLICY_MANAGER_STATE_CHANGED = 337;
    private static final int MSG_TELEPHONY_CAPABLE = 338;

    
Fingerprint state: Not listening to fingerprint. /** Fingerprint state: Not listening to fingerprint. */
    private static final int FINGERPRINT_STATE_STOPPED = 0;

    
Fingerprint state: Listening. /** Fingerprint state: Listening. */
    private static final int FINGERPRINT_STATE_RUNNING = 1;

    
Fingerprint state: Cancelling and waiting for the confirmation from FingerprintService to
send us the confirmation that cancellation has happened.
/**
     * Fingerprint state: Cancelling and waiting for the confirmation from FingerprintService to
     * send us the confirmation that cancellation has happened.
     */
    private static final int FINGERPRINT_STATE_CANCELLING = 2;

    
Fingerprint state: During cancelling we got another request to start listening, so when we
receive the cancellation done signal, we should start listening again.
/**
     * Fingerprint state: During cancelling we got another request to start listening, so when we
     * receive the cancellation done signal, we should start listening again.
     */
    private static final int FINGERPRINT_STATE_CANCELLING_RESTARTING = 3;

    private static final int DEFAULT_CHARGING_VOLTAGE_MICRO_VOLT = 5000000;

    private static final ComponentName FALLBACK_HOME_COMPONENT = new ComponentName(
            "com.android.settings", "com.android.settings.FallbackHome");


    
If true, the system is in the half-boot-to-decryption-screen state.
Prudently disable lockscreen.
/**
     * If true, the system is in the half-boot-to-decryption-screen state.
     * Prudently disable lockscreen.
     */
    public static final boolean CORE_APPS_ONLY;
    static {
        try {
            CORE_APPS_ONLY = IPackageManager.Stub.asInterface(
                    ServiceManager.getService("package")).isOnlyCoreApps();
        } catch (RemoteException e) {
            throw e.rethrowFromSystemServer();
        }
    }

    private static KeyguardUpdateMonitor sInstance;

    private final Context mContext;
    HashMap<Integer, SimData> mSimDatas = new HashMap<Integer, SimData>();
    HashMap<Integer, ServiceState> mServiceStates = new HashMap<Integer, ServiceState>();

    private int mRingMode;
    private int mPhoneState;
    private boolean mKeyguardIsVisible;
    private boolean mKeyguardGoingAway;
    private boolean mGoingToSleep;
    private boolean mBouncer;
    private boolean mBootCompleted;
    private boolean mNeedsSlowUnlockTransition;
    private boolean mHasLockscreenWallpaper;
    private boolean mAssistantVisible;
    private boolean mKeyguardOccluded;
    @VisibleForTesting
    protected boolean mTelephonyCapable;

    // Device provisioning state
    private boolean mDeviceProvisioned;

    // Battery status
    private BatteryStatus mBatteryStatus;

    private final StrongAuthTracker mStrongAuthTracker;

    private final ArrayList<WeakReference<KeyguardUpdateMonitorCallback>>
            mCallbacks = Lists.newArrayList();
    private ContentObserver mDeviceProvisionedObserver;

    private boolean mSwitchingUser;

    private boolean mDeviceInteractive;
    private boolean mScreenOn;
    private SubscriptionManager mSubscriptionManager;
    private List<SubscriptionInfo> mSubscriptionInfo;
    private TrustManager mTrustManager;
    private UserManager mUserManager;
    private int mFingerprintRunningState = FINGERPRINT_STATE_STOPPED;
    private LockPatternUtils mLockPatternUtils;
    private final IDreamManager mDreamManager;
    private boolean mIsDreaming;
    private final DevicePolicyManager mDevicePolicyManager;
    private boolean mLogoutEnabled;

    
Short delay before restarting fingerprint authentication after a successful try
This should be slightly longer than the time between onFingerprintAuthenticated and
setKeyguardGoingAway(true).
/**
     * Short delay before restarting fingerprint authentication after a successful try
     * This should be slightly longer than the time between onFingerprintAuthenticated and
     * setKeyguardGoingAway(true).
     */
    private static final int FINGERPRINT_CONTINUE_DELAY_MS = 500;

    // If FP daemon dies, keyguard should retry after a short delay
    private int mHardwareUnavailableRetryCount = 0;
    private static final int HW_UNAVAILABLE_TIMEOUT = 3000; // ms
    private static final int HW_UNAVAILABLE_RETRY_MAX = 3;

    private final Handler mHandler = new Handler(Looper.getMainLooper()) {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case MSG_TIME_UPDATE:
                    handleTimeUpdate();
                    break;
                case MSG_BATTERY_UPDATE:
                    handleBatteryUpdate((BatteryStatus) msg.obj);
                    break;
                case MSG_SIM_STATE_CHANGE:
                    handleSimStateChange(msg.arg1, msg.arg2, (State) msg.obj);
                    break;
                case MSG_RINGER_MODE_CHANGED:
                    handleRingerModeChange(msg.arg1);
                    break;
                case MSG_PHONE_STATE_CHANGED:
                    handlePhoneStateChanged((String) msg.obj);
                    break;
                case MSG_DEVICE_PROVISIONED:
                    handleDeviceProvisioned();
                    break;
                case MSG_DPM_STATE_CHANGED:
                    handleDevicePolicyManagerStateChanged();
                    break;
                case MSG_USER_SWITCHING:
                    handleUserSwitching(msg.arg1, (IRemoteCallback) msg.obj);
                    break;
                case MSG_USER_SWITCH_COMPLETE:
                    handleUserSwitchComplete(msg.arg1);
                    break;
                case MSG_KEYGUARD_RESET:
                    handleKeyguardReset();
                    break;
                case MSG_KEYGUARD_BOUNCER_CHANGED:
                    handleKeyguardBouncerChanged(msg.arg1);
                    break;
                case MSG_BOOT_COMPLETED:
                    handleBootCompleted();
                    break;
                case MSG_USER_INFO_CHANGED:
                    handleUserInfoChanged(msg.arg1);
                    break;
                case MSG_REPORT_EMERGENCY_CALL_ACTION:
                    handleReportEmergencyCallAction();
                    break;
                case MSG_STARTED_GOING_TO_SLEEP:
                    handleStartedGoingToSleep(msg.arg1);
                    break;
                case MSG_FINISHED_GOING_TO_SLEEP:
                    handleFinishedGoingToSleep(msg.arg1);
                    break;
                case MSG_STARTED_WAKING_UP:
                    Trace.beginSection("KeyguardUpdateMonitor#handler MSG_STARTED_WAKING_UP");
                    handleStartedWakingUp();
                    Trace.endSection();
                    break;
                case MSG_FACE_UNLOCK_STATE_CHANGED:
                    Trace.beginSection("KeyguardUpdateMonitor#handler MSG_FACE_UNLOCK_STATE_CHANGED");
                    handleFaceUnlockStateChanged(msg.arg1 != 0, msg.arg2);
                    Trace.endSection();
                    break;
                case MSG_SIM_SUBSCRIPTION_INFO_CHANGED:
                    handleSimSubscriptionInfoChanged();
                    break;
                case MSG_AIRPLANE_MODE_CHANGED:
                    handleAirplaneModeChanged();
                    break;
                case MSG_SERVICE_STATE_CHANGE:
                    handleServiceStateChange(msg.arg1, (ServiceState) msg.obj);
                    break;
                case MSG_SCREEN_TURNED_ON:
                    handleScreenTurnedOn();
                    break;
                case MSG_SCREEN_TURNED_OFF:
                    Trace.beginSection("KeyguardUpdateMonitor#handler MSG_SCREEN_TURNED_ON");
                    handleScreenTurnedOff();
                    Trace.endSection();
                    break;
                case MSG_DREAMING_STATE_CHANGED:
                    handleDreamingStateChanged(msg.arg1);
                    break;
                case MSG_USER_UNLOCKED:
                    handleUserUnlocked();
                    break;
                case MSG_ASSISTANT_STACK_CHANGED:
                    mAssistantVisible = (boolean)msg.obj;
                    updateFingerprintListeningState();
                    break;
                case MSG_FINGERPRINT_AUTHENTICATION_CONTINUE:
                    updateFingerprintListeningState();
                    break;
                case MSG_DEVICE_POLICY_MANAGER_STATE_CHANGED:
                    updateLogoutEnabled();
                    break;
                case MSG_TELEPHONY_CAPABLE:
                    updateTelephonyCapable((boolean)msg.obj);
                    break;
                default:
                    super.handleMessage(msg);
                    break;
            }
        }
    };

    private OnSubscriptionsChangedListener mSubscriptionListener =
            new OnSubscriptionsChangedListener() {
        @Override
        public void onSubscriptionsChanged() {
            mHandler.sendEmptyMessage(MSG_SIM_SUBSCRIPTION_INFO_CHANGED);
        }
    };

    private SparseBooleanArray mUserHasTrust = new SparseBooleanArray();
    private SparseBooleanArray mUserTrustIsManaged = new SparseBooleanArray();
    private SparseBooleanArray mUserFingerprintAuthenticated = new SparseBooleanArray();
    private SparseBooleanArray mUserFaceUnlockRunning = new SparseBooleanArray();

    private static int sCurrentUser;
    private Runnable mUpdateFingerprintListeningState = this::updateFingerprintListeningState;
    private static boolean sDisableHandlerCheckForTesting;

    public synchronized static void setCurrentUser(int currentUser) {
        sCurrentUser = currentUser;
    }

    public synchronized static int getCurrentUser() {
        return sCurrentUser;
    }

    @Override
    public void onTrustChanged(boolean enabled, int userId, int flags) {
        checkIsHandlerThread();
        mUserHasTrust.put(userId, enabled);
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onTrustChanged(userId);
                if (enabled && flags != 0) {
                    cb.onTrustGrantedWithFlags(flags, userId);
                }
            }
        }
    }

    @Override
    public void onTrustError(CharSequence message) {
        dispatchErrorMessage(message);
    }

    private void handleSimSubscriptionInfoChanged() {
        if (DEBUG_SIM_STATES) {
            Log.v(TAG, "onSubscriptionInfoChanged()");
            List<SubscriptionInfo> sil = mSubscriptionManager.getActiveSubscriptionInfoList();
            if (sil != null) {
                for (SubscriptionInfo subInfo : sil) {
                    Log.v(TAG, "SubInfo:" + subInfo);
                }
            } else {
                Log.v(TAG, "onSubscriptionInfoChanged: list is null");
            }
        }
        List<SubscriptionInfo> subscriptionInfos = getSubscriptionInfo(true /* forceReload */);

        // Hack level over 9000: Because the subscription id is not yet valid when we see the
        // first update in handleSimStateChange, we need to force refresh all all SIM states
        // so the subscription id for them is consistent.
        ArrayList<SubscriptionInfo> changedSubscriptions = new ArrayList<>();
        for (int i = 0; i < subscriptionInfos.size(); i++) {
            SubscriptionInfo info = subscriptionInfos.get(i);
            boolean changed = refreshSimState(info.getSubscriptionId(), info.getSimSlotIndex());
            if (changed) {
                changedSubscriptions.add(info);
            }
        }
        for (int i = 0; i < changedSubscriptions.size(); i++) {
            SimData data = mSimDatas.get(changedSubscriptions.get(i).getSubscriptionId());
            for (int j = 0; j < mCallbacks.size(); j++) {
                KeyguardUpdateMonitorCallback cb = mCallbacks.get(j).get();
                if (cb != null) {
                    cb.onSimStateChanged(data.subId, data.slotId, data.simState);
                }
            }
        }
        for (int j = 0; j < mCallbacks.size(); j++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(j).get();
            if (cb != null) {
                cb.onRefreshCarrierInfo();
            }
        }
    }

    private void handleAirplaneModeChanged() {
        for (int j = 0; j < mCallbacks.size(); j++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(j).get();
            if (cb != null) {
                cb.onRefreshCarrierInfo();
            }
        }
    }

    
Returns:
List of SubscriptionInfo records, maybe empty but never null/** @return List of SubscriptionInfo records, maybe empty but never null */
    public List<SubscriptionInfo> getSubscriptionInfo(boolean forceReload) {
        List<SubscriptionInfo> sil = mSubscriptionInfo;
        if (sil == null || forceReload) {
            sil = mSubscriptionManager.getActiveSubscriptionInfoList();
        }
        if (sil == null) {
            // getActiveSubscriptionInfoList was null callers expect an empty list.
            mSubscriptionInfo = new ArrayList<SubscriptionInfo>();
        } else {
            mSubscriptionInfo = sil;
        }
        return mSubscriptionInfo;
    }

    @Override
    public void onTrustManagedChanged(boolean managed, int userId) {
        checkIsHandlerThread();
        mUserTrustIsManaged.put(userId, managed);

        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onTrustManagedChanged(userId);
            }
        }
    }

    
Updates KeyguardUpdateMonitor's internal state to know if keyguard is goingAway
Params:
goingAway – /**
     * Updates KeyguardUpdateMonitor's internal state to know if keyguard is goingAway
     * @param goingAway
     */
    public void setKeyguardGoingAway(boolean goingAway) {
        mKeyguardGoingAway = goingAway;
        updateFingerprintListeningState();
    }

    
Updates KeyguardUpdateMonitor's internal state to know if keyguard is occluded
Params:
occluded – /**
     * Updates KeyguardUpdateMonitor's internal state to know if keyguard is occluded
     * @param occluded
     */
    public void setKeyguardOccluded(boolean occluded) {
        mKeyguardOccluded = occluded;
        updateFingerprintListeningState();
    }

    
Returns:
a cached version of DreamManager.isDreaming()/**
     * @return a cached version of DreamManager.isDreaming()
     */
    public boolean isDreaming() {
        return mIsDreaming;
    }

    
If the device is dreaming, awakens the device
/**
     * If the device is dreaming, awakens the device
     */
    public void awakenFromDream() {
        if (mIsDreaming && mDreamManager != null) {
            try {
                mDreamManager.awaken();
            } catch (RemoteException e) {
                Log.e(TAG, "Unable to awaken from dream");
            }
        }
    }

    private void onFingerprintAuthenticated(int userId) {
        Trace.beginSection("KeyGuardUpdateMonitor#onFingerPrintAuthenticated");
        mUserFingerprintAuthenticated.put(userId, true);
        // Update/refresh trust state only if user can skip bouncer
        if (getUserCanSkipBouncer(userId)) {
            mTrustManager.unlockedByFingerprintForUser(userId);
        }
        // Don't send cancel if authentication succeeds
        mFingerprintCancelSignal = null;
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFingerprintAuthenticated(userId);
            }
        }

        mHandler.sendMessageDelayed(mHandler.obtainMessage(MSG_FINGERPRINT_AUTHENTICATION_CONTINUE),
                FINGERPRINT_CONTINUE_DELAY_MS);

        // Only authenticate fingerprint once when assistant is visible
        mAssistantVisible = false;

        Trace.endSection();
    }

    private void handleFingerprintAuthFailed() {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFingerprintAuthFailed();
            }
        }
        handleFingerprintHelp(-1, mContext.getString(R.string.fingerprint_not_recognized));
    }

    private void handleFingerprintAcquired(int acquireInfo) {
        if (acquireInfo != FingerprintManager.FINGERPRINT_ACQUIRED_GOOD) {
            return;
        }
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFingerprintAcquired();
            }
        }
    }

    private void handleFingerprintAuthenticated(int authUserId) {
        Trace.beginSection("KeyGuardUpdateMonitor#handlerFingerPrintAuthenticated");
        try {
            final int userId;
            try {
                userId = ActivityManager.getService().getCurrentUser().id;
            } catch (RemoteException e) {
                Log.e(TAG, "Failed to get current user id: ", e);
                return;
            }
            if (userId != authUserId) {
                Log.d(TAG, "Fingerprint authenticated for wrong user: " + authUserId);
                return;
            }
            if (isFingerprintDisabled(userId)) {
                Log.d(TAG, "Fingerprint disabled by DPM for userId: " + userId);
                return;
            }
            onFingerprintAuthenticated(userId);
        } finally {
            setFingerprintRunningState(FINGERPRINT_STATE_STOPPED);
        }
        Trace.endSection();
    }

    private void handleFingerprintHelp(int msgId, String helpString) {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFingerprintHelp(msgId, helpString);
            }
        }
    }

    private Runnable mRetryFingerprintAuthentication = new Runnable() {
        @Override
        public void run() {
            Log.w(TAG, "Retrying fingerprint after HW unavailable, attempt " +
                    mHardwareUnavailableRetryCount);
            updateFingerprintListeningState();
        }
    };

    private void handleFingerprintError(int msgId, String errString) {
        if (msgId == FingerprintManager.FINGERPRINT_ERROR_CANCELED
                && mFingerprintRunningState == FINGERPRINT_STATE_CANCELLING_RESTARTING) {
            setFingerprintRunningState(FINGERPRINT_STATE_STOPPED);
            startListeningForFingerprint();
        } else {
            setFingerprintRunningState(FINGERPRINT_STATE_STOPPED);
        }

        if (msgId == FingerprintManager.FINGERPRINT_ERROR_HW_UNAVAILABLE) {
            if (mHardwareUnavailableRetryCount < HW_UNAVAILABLE_RETRY_MAX) {
                mHardwareUnavailableRetryCount++;
                mHandler.removeCallbacks(mRetryFingerprintAuthentication);
                mHandler.postDelayed(mRetryFingerprintAuthentication, HW_UNAVAILABLE_TIMEOUT);
            }
        }

        if (msgId == FingerprintManager.FINGERPRINT_ERROR_LOCKOUT_PERMANENT) {
            mLockPatternUtils.requireStrongAuth(
                    LockPatternUtils.StrongAuthTracker.STRONG_AUTH_REQUIRED_AFTER_LOCKOUT,
                    getCurrentUser());
        }

        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFingerprintError(msgId, errString);
            }
        }
    }

    private void handleFingerprintLockoutReset() {
        updateFingerprintListeningState();
    }

    private void setFingerprintRunningState(int fingerprintRunningState) {
        boolean wasRunning = mFingerprintRunningState == FINGERPRINT_STATE_RUNNING;
        boolean isRunning = fingerprintRunningState == FINGERPRINT_STATE_RUNNING;
        mFingerprintRunningState = fingerprintRunningState;

        // Clients of KeyguardUpdateMonitor don't care about the internal state about the
        // asynchronousness of the cancel cycle. So only notify them if the actualy running state
        // has changed.
        if (wasRunning != isRunning) {
            notifyFingerprintRunningStateChanged();
        }
    }

    private void notifyFingerprintRunningStateChanged() {
        checkIsHandlerThread();
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFingerprintRunningStateChanged(isFingerprintDetectionRunning());
            }
        }
    }
    private void handleFaceUnlockStateChanged(boolean running, int userId) {
        checkIsHandlerThread();
        mUserFaceUnlockRunning.put(userId, running);
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFaceUnlockStateChanged(running, userId);
            }
        }
    }

    public boolean isFaceUnlockRunning(int userId) {
        return mUserFaceUnlockRunning.get(userId);
    }

    public boolean isFingerprintDetectionRunning() {
        return mFingerprintRunningState == FINGERPRINT_STATE_RUNNING;
    }

    private boolean isTrustDisabled(int userId) {
        // Don't allow trust agent if device is secured with a SIM PIN. This is here
        // mainly because there's no other way to prompt the user to enter their SIM PIN
        // once they get past the keyguard screen.
        final boolean disabledBySimPin = isSimPinSecure();
        return disabledBySimPin;
    }

    private boolean isFingerprintDisabled(int userId) {
        final DevicePolicyManager dpm =
                (DevicePolicyManager) mContext.getSystemService(Context.DEVICE_POLICY_SERVICE);
        return dpm != null && (dpm.getKeyguardDisabledFeatures(null, userId)
                    & DevicePolicyManager.KEYGUARD_DISABLE_FINGERPRINT) != 0
                || isSimPinSecure();
    }

    public boolean getUserCanSkipBouncer(int userId) {
        return getUserHasTrust(userId) || (mUserFingerprintAuthenticated.get(userId)
                && isUnlockingWithFingerprintAllowed());
    }

    public boolean getUserHasTrust(int userId) {
        return !isTrustDisabled(userId) && mUserHasTrust.get(userId);
    }

    public boolean getUserTrustIsManaged(int userId) {
        return mUserTrustIsManaged.get(userId) && !isTrustDisabled(userId);
    }

    public boolean isUnlockingWithFingerprintAllowed() {
        return mStrongAuthTracker.isUnlockingWithFingerprintAllowed();
    }

    public boolean isUserInLockdown(int userId) {
        return mStrongAuthTracker.getStrongAuthForUser(userId)
                == LockPatternUtils.StrongAuthTracker.STRONG_AUTH_REQUIRED_AFTER_USER_LOCKDOWN;
    }

    public boolean needsSlowUnlockTransition() {
        return mNeedsSlowUnlockTransition;
    }

    public StrongAuthTracker getStrongAuthTracker() {
        return mStrongAuthTracker;
    }

    private void notifyStrongAuthStateChanged(int userId) {
        checkIsHandlerThread();
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onStrongAuthStateChanged(userId);
            }
        }
    }

    public boolean isScreenOn() {
        return mScreenOn;
    }

    private void dispatchErrorMessage(CharSequence message) {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onTrustAgentErrorMessage(message);
            }
        }
    }

    static class DisplayClientState {
        public int clientGeneration;
        public boolean clearing;
        public PendingIntent intent;
        public int playbackState;
        public long playbackEventTime;
    }

    private DisplayClientState mDisplayClientState = new DisplayClientState();

    @VisibleForTesting
    protected final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (DEBUG) Log.d(TAG, "received broadcast " + action);

            if (Intent.ACTION_TIME_TICK.equals(action)
                    || Intent.ACTION_TIME_CHANGED.equals(action)
                    || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) {
                mHandler.sendEmptyMessage(MSG_TIME_UPDATE);
            } else if (Intent.ACTION_BATTERY_CHANGED.equals(action)) {
                final int status = intent.getIntExtra(EXTRA_STATUS, BATTERY_STATUS_UNKNOWN);
                final int plugged = intent.getIntExtra(EXTRA_PLUGGED, 0);
                final int level = intent.getIntExtra(EXTRA_LEVEL, 0);
                final int health = intent.getIntExtra(EXTRA_HEALTH, BATTERY_HEALTH_UNKNOWN);

                final int maxChargingMicroAmp = intent.getIntExtra(EXTRA_MAX_CHARGING_CURRENT, -1);
                int maxChargingMicroVolt = intent.getIntExtra(EXTRA_MAX_CHARGING_VOLTAGE, -1);
                final int maxChargingMicroWatt;

                if (maxChargingMicroVolt <= 0) {
                    maxChargingMicroVolt = DEFAULT_CHARGING_VOLTAGE_MICRO_VOLT;
                }
                if (maxChargingMicroAmp > 0) {
                    // Calculating muW = muA * muV / (10^6 mu^2 / mu); splitting up the divisor
                    // to maintain precision equally on both factors.
                    maxChargingMicroWatt = (maxChargingMicroAmp / 1000)
                            * (maxChargingMicroVolt / 1000);
                } else {
                    maxChargingMicroWatt = -1;
                }
                final Message msg = mHandler.obtainMessage(
                        MSG_BATTERY_UPDATE, new BatteryStatus(status, level, plugged, health,
                                maxChargingMicroWatt));
                mHandler.sendMessage(msg);
            } else if (TelephonyIntents.ACTION_SIM_STATE_CHANGED.equals(action)) {
                SimData args = SimData.fromIntent(intent);
                // ACTION_SIM_STATE_CHANGED is rebroadcast after unlocking the device to
                // keep compatibility with apps that aren't direct boot aware.
                // SysUI should just ignore this broadcast because it was already received
                // and processed previously.
                if (intent.getBooleanExtra(TelephonyIntents.EXTRA_REBROADCAST_ON_UNLOCK, false)) {
                    // Guarantee mTelephonyCapable state after SysUI crash and restart
                    if (args.simState == State.ABSENT) {
                        mHandler.obtainMessage(MSG_TELEPHONY_CAPABLE, true).sendToTarget();
                    }
                    return;
                }
                if (DEBUG_SIM_STATES) {
                    Log.v(TAG, "action " + action
                        + " state: " + intent.getStringExtra(IccCardConstants.INTENT_KEY_ICC_STATE)
                        + " slotId: " + args.slotId + " subid: " + args.subId);
                }
                mHandler.obtainMessage(MSG_SIM_STATE_CHANGE, args.subId, args.slotId, args.simState)
                        .sendToTarget();
            } else if (AudioManager.RINGER_MODE_CHANGED_ACTION.equals(action)) {
                mHandler.sendMessage(mHandler.obtainMessage(MSG_RINGER_MODE_CHANGED,
                        intent.getIntExtra(AudioManager.EXTRA_RINGER_MODE, -1), 0));
            } else if (TelephonyManager.ACTION_PHONE_STATE_CHANGED.equals(action)) {
                String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
                mHandler.sendMessage(mHandler.obtainMessage(MSG_PHONE_STATE_CHANGED, state));
            } else if (Intent.ACTION_AIRPLANE_MODE_CHANGED.equals(action)) {
                mHandler.sendEmptyMessage(MSG_AIRPLANE_MODE_CHANGED);
            } else if (Intent.ACTION_BOOT_COMPLETED.equals(action)) {
                dispatchBootCompleted();
            } else if (TelephonyIntents.ACTION_SERVICE_STATE_CHANGED.equals(action)) {
                ServiceState serviceState = ServiceState.newFromBundle(intent.getExtras());
                int subId = intent.getIntExtra(PhoneConstants.SUBSCRIPTION_KEY,
                        SubscriptionManager.INVALID_SUBSCRIPTION_ID);
                if (DEBUG) {
                    Log.v(TAG, "action " + action + " serviceState=" + serviceState + " subId="
                            + subId);
                }
                mHandler.sendMessage(
                        mHandler.obtainMessage(MSG_SERVICE_STATE_CHANGE, subId, 0, serviceState));
            } else if (DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED.equals(
                    action)) {
                mHandler.sendEmptyMessage(MSG_DEVICE_POLICY_MANAGER_STATE_CHANGED);
            }
        }
    };

    private final BroadcastReceiver mBroadcastAllReceiver = new BroadcastReceiver() {

        @Override
        public void onReceive(Context context, Intent intent) {
            final String action = intent.getAction();
            if (AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED.equals(action)) {
                mHandler.sendEmptyMessage(MSG_TIME_UPDATE);
            } else if (Intent.ACTION_USER_INFO_CHANGED.equals(action)) {
                mHandler.sendMessage(mHandler.obtainMessage(MSG_USER_INFO_CHANGED,
                        intent.getIntExtra(Intent.EXTRA_USER_HANDLE, getSendingUserId()), 0));
            } else if (ACTION_FACE_UNLOCK_STARTED.equals(action)) {
                Trace.beginSection("KeyguardUpdateMonitor.mBroadcastAllReceiver#onReceive ACTION_FACE_UNLOCK_STARTED");
                mHandler.sendMessage(mHandler.obtainMessage(MSG_FACE_UNLOCK_STATE_CHANGED, 1,
                        getSendingUserId()));
                Trace.endSection();
            } else if (ACTION_FACE_UNLOCK_STOPPED.equals(action)) {
                mHandler.sendMessage(mHandler.obtainMessage(MSG_FACE_UNLOCK_STATE_CHANGED, 0,
                        getSendingUserId()));
            } else if (DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED
                    .equals(action)) {
                mHandler.sendEmptyMessage(MSG_DPM_STATE_CHANGED);
            } else if (ACTION_USER_UNLOCKED.equals(action)) {
                mHandler.sendEmptyMessage(MSG_USER_UNLOCKED);
            }
        }
    };

    private final FingerprintManager.LockoutResetCallback mLockoutResetCallback
            = new FingerprintManager.LockoutResetCallback() {
        @Override
        public void onLockoutReset() {
            handleFingerprintLockoutReset();
        }
    };

    private FingerprintManager.AuthenticationCallback mAuthenticationCallback
            = new AuthenticationCallback() {

        @Override
        public void onAuthenticationFailed() {
            handleFingerprintAuthFailed();
        };

        @Override
        public void onAuthenticationSucceeded(AuthenticationResult result) {
            Trace.beginSection("KeyguardUpdateMonitor#onAuthenticationSucceeded");
            handleFingerprintAuthenticated(result.getUserId());
            Trace.endSection();
        }

        @Override
        public void onAuthenticationHelp(int helpMsgId, CharSequence helpString) {
            handleFingerprintHelp(helpMsgId, helpString.toString());
        }

        @Override
        public void onAuthenticationError(int errMsgId, CharSequence errString) {
            handleFingerprintError(errMsgId, errString.toString());
        }

        @Override
        public void onAuthenticationAcquired(int acquireInfo) {
            handleFingerprintAcquired(acquireInfo);
        }
    };
    private CancellationSignal mFingerprintCancelSignal;
    private FingerprintManager mFpm;

    
When we receive a TelephonyIntents.ACTION_SIM_STATE_CHANGED broadcast, and then pass a result via our handler to KeyguardUpdateMonitor.handleSimStateChange, we need a single object to pass to the handler. This class helps decode the intent and provide a State result. /**
     * When we receive a
     * {@link com.android.internal.telephony.TelephonyIntents#ACTION_SIM_STATE_CHANGED} broadcast,
     * and then pass a result via our handler to {@link KeyguardUpdateMonitor#handleSimStateChange},
     * we need a single object to pass to the handler.  This class helps decode
     * the intent and provide a {@link SimCard.State} result.
     */
    private static class SimData {
        public State simState;
        public int slotId;
        public int subId;

        SimData(State state, int slot, int id) {
            simState = state;
            slotId = slot;
            subId = id;
        }

        static SimData fromIntent(Intent intent) {
            State state;
            if (!TelephonyIntents.ACTION_SIM_STATE_CHANGED.equals(intent.getAction())) {
                throw new IllegalArgumentException("only handles intent ACTION_SIM_STATE_CHANGED");
            }
            String stateExtra = intent.getStringExtra(IccCardConstants.INTENT_KEY_ICC_STATE);
            int slotId = intent.getIntExtra(PhoneConstants.SLOT_KEY, 0);
            int subId = intent.getIntExtra(PhoneConstants.SUBSCRIPTION_KEY,
                    SubscriptionManager.INVALID_SUBSCRIPTION_ID);
            if (IccCardConstants.INTENT_VALUE_ICC_ABSENT.equals(stateExtra)) {
                final String absentReason = intent
                    .getStringExtra(IccCardConstants.INTENT_KEY_LOCKED_REASON);

                if (IccCardConstants.INTENT_VALUE_ABSENT_ON_PERM_DISABLED.equals(
                        absentReason)) {
                    state = IccCardConstants.State.PERM_DISABLED;
                } else {
                    state = IccCardConstants.State.ABSENT;
                }
            } else if (IccCardConstants.INTENT_VALUE_ICC_READY.equals(stateExtra)) {
                state = IccCardConstants.State.READY;
            } else if (IccCardConstants.INTENT_VALUE_ICC_LOCKED.equals(stateExtra)) {
                final String lockedReason = intent
                        .getStringExtra(IccCardConstants.INTENT_KEY_LOCKED_REASON);
                if (IccCardConstants.INTENT_VALUE_LOCKED_ON_PIN.equals(lockedReason)) {
                    state = IccCardConstants.State.PIN_REQUIRED;
                } else if (IccCardConstants.INTENT_VALUE_LOCKED_ON_PUK.equals(lockedReason)) {
                    state = IccCardConstants.State.PUK_REQUIRED;
                } else {
                    state = IccCardConstants.State.UNKNOWN;
                }
            } else if (IccCardConstants.INTENT_VALUE_LOCKED_NETWORK.equals(stateExtra)) {
                state = IccCardConstants.State.NETWORK_LOCKED;
            } else if (IccCardConstants.INTENT_VALUE_ICC_CARD_IO_ERROR.equals(stateExtra)) {
                state = IccCardConstants.State.CARD_IO_ERROR;
            } else if (IccCardConstants.INTENT_VALUE_ICC_LOADED.equals(stateExtra)
                        || IccCardConstants.INTENT_VALUE_ICC_IMSI.equals(stateExtra)) {
                // This is required because telephony doesn't return to "READY" after
                // these state transitions. See bug 7197471.
                state = IccCardConstants.State.READY;
            } else {
                state = IccCardConstants.State.UNKNOWN;
            }
            return new SimData(state, slotId, subId);
        }

        @Override
        public String toString() {
            return "SimData{state=" + simState + ",slotId=" + slotId + ",subId=" + subId + "}";
        }
    }

    public static class BatteryStatus {
        public static final int CHARGING_UNKNOWN = -1;
        public static final int CHARGING_SLOWLY = 0;
        public static final int CHARGING_REGULAR = 1;
        public static final int CHARGING_FAST = 2;

        public final int status;
        public final int level;
        public final int plugged;
        public final int health;
        public final int maxChargingWattage;
        public BatteryStatus(int status, int level, int plugged, int health,
                int maxChargingWattage) {
            this.status = status;
            this.level = level;
            this.plugged = plugged;
            this.health = health;
            this.maxChargingWattage = maxChargingWattage;
        }

        
Determine whether the device is plugged in (USB, power, or wireless).
Returns:
true if the device is plugged in./**
         * Determine whether the device is plugged in (USB, power, or wireless).
         * @return true if the device is plugged in.
         */
        public boolean isPluggedIn() {
            return plugged == BatteryManager.BATTERY_PLUGGED_AC
                    || plugged == BatteryManager.BATTERY_PLUGGED_USB
                    || plugged == BatteryManager.BATTERY_PLUGGED_WIRELESS;
        }

        
Determine whether the device is plugged in (USB, power).
Returns:
true if the device is plugged in wired (as opposed to wireless)/**
         * Determine whether the device is plugged in (USB, power).
         * @return true if the device is plugged in wired (as opposed to wireless)
         */
        public boolean isPluggedInWired() {
            return plugged == BatteryManager.BATTERY_PLUGGED_AC
                    || plugged == BatteryManager.BATTERY_PLUGGED_USB;
        }

        
Whether or not the device is charged. Note that some devices never return 100% for
battery level, so this allows either battery level or status to determine if the
battery is charged.
Returns:
true if the device is charged/**
         * Whether or not the device is charged. Note that some devices never return 100% for
         * battery level, so this allows either battery level or status to determine if the
         * battery is charged.
         * @return true if the device is charged
         */
        public boolean isCharged() {
            return status == BATTERY_STATUS_FULL || level >= 100;
        }

        
Whether battery is low and needs to be charged.
Returns:
true if battery is low/**
         * Whether battery is low and needs to be charged.
         * @return true if battery is low
         */
        public boolean isBatteryLow() {
            return level < LOW_BATTERY_THRESHOLD;
        }

        public final int getChargingSpeed(int slowThreshold, int fastThreshold) {
            return maxChargingWattage <= 0 ? CHARGING_UNKNOWN :
                    maxChargingWattage < slowThreshold ? CHARGING_SLOWLY :
                    maxChargingWattage > fastThreshold ? CHARGING_FAST :
                    CHARGING_REGULAR;
        }

        @Override
        public String toString() {
            return "BatteryStatus{status=" + status + ",level=" + level + ",plugged=" + plugged
                    + ",health=" + health + ",maxChargingWattage=" + maxChargingWattage + "}";
        }
    }

    public class StrongAuthTracker extends LockPatternUtils.StrongAuthTracker {
        public StrongAuthTracker(Context context) {
            super(context);
        }

        public boolean isUnlockingWithFingerprintAllowed() {
            int userId = getCurrentUser();
            return isFingerprintAllowedForUser(userId);
        }

        public boolean hasUserAuthenticatedSinceBoot() {
            int userId = getCurrentUser();
            return (getStrongAuthForUser(userId)
                    & STRONG_AUTH_REQUIRED_AFTER_BOOT) == 0;
        }

        @Override
        public void onStrongAuthRequiredChanged(int userId) {
            notifyStrongAuthStateChanged(userId);
        }
    }

    public static KeyguardUpdateMonitor getInstance(Context context) {
        if (sInstance == null) {
            sInstance = new KeyguardUpdateMonitor(context);
        }
        return sInstance;
    }

    protected void handleStartedWakingUp() {
        Trace.beginSection("KeyguardUpdateMonitor#handleStartedWakingUp");
        updateFingerprintListeningState();
        final int count = mCallbacks.size();
        for (int i = 0; i < count; i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onStartedWakingUp();
            }
        }
        Trace.endSection();
    }

    protected void handleStartedGoingToSleep(int arg1) {
        clearFingerprintRecognized();
        final int count = mCallbacks.size();
        for (int i = 0; i < count; i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onStartedGoingToSleep(arg1);
            }
        }
        mGoingToSleep = true;
        updateFingerprintListeningState();
    }

    protected void handleFinishedGoingToSleep(int arg1) {
        mGoingToSleep = false;
        final int count = mCallbacks.size();
        for (int i = 0; i < count; i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onFinishedGoingToSleep(arg1);
            }
        }
        updateFingerprintListeningState();
    }

    private void handleScreenTurnedOn() {
        final int count = mCallbacks.size();
        for (int i = 0; i < count; i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onScreenTurnedOn();
            }
        }
    }

    private void handleScreenTurnedOff() {
        mHardwareUnavailableRetryCount = 0;
        final int count = mCallbacks.size();
        for (int i = 0; i < count; i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onScreenTurnedOff();
            }
        }
    }

    private void handleDreamingStateChanged(int dreamStart) {
        final int count = mCallbacks.size();
        mIsDreaming = dreamStart == 1;
        for (int i = 0; i < count; i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onDreamingStateChanged(mIsDreaming);
            }
        }
        updateFingerprintListeningState();
    }

    private void handleUserInfoChanged(int userId) {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onUserInfoChanged(userId);
            }
        }
    }

    private void handleUserUnlocked() {
        mNeedsSlowUnlockTransition = resolveNeedsSlowUnlockTransition();
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onUserUnlocked();
            }
        }
    }

    @VisibleForTesting
    protected KeyguardUpdateMonitor(Context context) {
        mContext = context;
        mSubscriptionManager = SubscriptionManager.from(context);
        mDeviceProvisioned = isDeviceProvisionedInSettingsDb();
        mStrongAuthTracker = new StrongAuthTracker(context);

        // Since device can't be un-provisioned, we only need to register a content observer
        // to update mDeviceProvisioned when we are...
        if (!mDeviceProvisioned) {
            watchForDeviceProvisioning();
        }

        // Take a guess at initial SIM state, battery status and PLMN until we get an update
        mBatteryStatus = new BatteryStatus(BATTERY_STATUS_UNKNOWN, 100, 0, 0, 0);

        // Watch for interesting updates
        final IntentFilter filter = new IntentFilter();
        filter.addAction(Intent.ACTION_TIME_TICK);
        filter.addAction(Intent.ACTION_TIME_CHANGED);
        filter.addAction(Intent.ACTION_BATTERY_CHANGED);
        filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
        filter.addAction(Intent.ACTION_AIRPLANE_MODE_CHANGED);
        filter.addAction(TelephonyIntents.ACTION_SIM_STATE_CHANGED);
        filter.addAction(TelephonyIntents.ACTION_SERVICE_STATE_CHANGED);
        filter.addAction(TelephonyManager.ACTION_PHONE_STATE_CHANGED);
        filter.addAction(AudioManager.RINGER_MODE_CHANGED_ACTION);
        filter.addAction(DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED);
        context.registerReceiver(mBroadcastReceiver, filter, null, mHandler);

        final IntentFilter bootCompleteFilter = new IntentFilter();
        bootCompleteFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
        bootCompleteFilter.addAction(Intent.ACTION_BOOT_COMPLETED);
        context.registerReceiver(mBroadcastReceiver, bootCompleteFilter, null, mHandler);

        final IntentFilter allUserFilter = new IntentFilter();
        allUserFilter.addAction(Intent.ACTION_USER_INFO_CHANGED);
        allUserFilter.addAction(AlarmManager.ACTION_NEXT_ALARM_CLOCK_CHANGED);
        allUserFilter.addAction(ACTION_FACE_UNLOCK_STARTED);
        allUserFilter.addAction(ACTION_FACE_UNLOCK_STOPPED);
        allUserFilter.addAction(DevicePolicyManager.ACTION_DEVICE_POLICY_MANAGER_STATE_CHANGED);
        allUserFilter.addAction(ACTION_USER_UNLOCKED);
        context.registerReceiverAsUser(mBroadcastAllReceiver, UserHandle.ALL, allUserFilter,
                null, mHandler);

        mSubscriptionManager.addOnSubscriptionsChangedListener(mSubscriptionListener);
        try {
            ActivityManager.getService().registerUserSwitchObserver(
                    new UserSwitchObserver() {
                        @Override
                        public void onUserSwitching(int newUserId, IRemoteCallback reply) {
                            mHandler.sendMessage(mHandler.obtainMessage(MSG_USER_SWITCHING,
                                    newUserId, 0, reply));
                        }
                        @Override
                        public void onUserSwitchComplete(int newUserId) throws RemoteException {
                            mHandler.sendMessage(mHandler.obtainMessage(MSG_USER_SWITCH_COMPLETE,
                                    newUserId, 0));
                        }
                    }, TAG);
        } catch (RemoteException e) {
            e.rethrowAsRuntimeException();
        }

        mTrustManager = (TrustManager) context.getSystemService(Context.TRUST_SERVICE);
        mTrustManager.registerTrustListener(this);
        mLockPatternUtils = new LockPatternUtils(context);
        mLockPatternUtils.registerStrongAuthTracker(mStrongAuthTracker);

        mDreamManager = IDreamManager.Stub.asInterface(
                ServiceManager.getService(DreamService.DREAM_SERVICE));

        if (mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_FINGERPRINT)) {
            mFpm = (FingerprintManager) context.getSystemService(Context.FINGERPRINT_SERVICE);
        }
        updateFingerprintListeningState();
        if (mFpm != null) {
            mFpm.addLockoutResetCallback(mLockoutResetCallback);
        }

        ActivityManagerWrapper.getInstance().registerTaskStackListener(mTaskStackListener);
        mUserManager = context.getSystemService(UserManager.class);
        mDevicePolicyManager = context.getSystemService(DevicePolicyManager.class);
        mLogoutEnabled = mDevicePolicyManager.isLogoutEnabled();
        updateAirplaneModeState();
    }

    private void updateAirplaneModeState() {
        // ACTION_AIRPLANE_MODE_CHANGED do not broadcast if device set AirplaneMode ON and boot
        if (!WirelessUtils.isAirplaneModeOn(mContext)
                || mHandler.hasMessages(MSG_AIRPLANE_MODE_CHANGED)) {
            return;
        }
        mHandler.sendEmptyMessage(MSG_AIRPLANE_MODE_CHANGED);
    }

    private void updateFingerprintListeningState() {
        // If this message exists, we should not authenticate again until this message is
        // consumed by the handler
        if (mHandler.hasMessages(MSG_FINGERPRINT_AUTHENTICATION_CONTINUE)) {
            return;
        }
        mHandler.removeCallbacks(mRetryFingerprintAuthentication);
        boolean shouldListenForFingerprint = shouldListenForFingerprint();
        if (mFingerprintRunningState == FINGERPRINT_STATE_RUNNING && !shouldListenForFingerprint) {
            stopListeningForFingerprint();
        } else if (mFingerprintRunningState != FINGERPRINT_STATE_RUNNING
                && shouldListenForFingerprint) {
            startListeningForFingerprint();
        }
    }

    private boolean shouldListenForFingerprintAssistant() {
        return mAssistantVisible && mKeyguardOccluded
                && !mUserFingerprintAuthenticated.get(getCurrentUser(), false)
                && !mUserHasTrust.get(getCurrentUser(), false);
    }

    private boolean shouldListenForFingerprint() {
        return (mKeyguardIsVisible || !mDeviceInteractive ||
                (mBouncer && !mKeyguardGoingAway) || mGoingToSleep ||
                shouldListenForFingerprintAssistant() || (mKeyguardOccluded && mIsDreaming))
                && !mSwitchingUser && !isFingerprintDisabled(getCurrentUser())
                && !mKeyguardGoingAway;
    }

    private void startListeningForFingerprint() {
        if (mFingerprintRunningState == FINGERPRINT_STATE_CANCELLING) {
            setFingerprintRunningState(FINGERPRINT_STATE_CANCELLING_RESTARTING);
            return;
        }
        if (DEBUG) Log.v(TAG, "startListeningForFingerprint()");
        int userId = ActivityManager.getCurrentUser();
        if (isUnlockWithFingerprintPossible(userId)) {
            if (mFingerprintCancelSignal != null) {
                mFingerprintCancelSignal.cancel();
            }
            mFingerprintCancelSignal = new CancellationSignal();
            mFpm.authenticate(null, mFingerprintCancelSignal, 0, mAuthenticationCallback, null,
                    userId);
            setFingerprintRunningState(FINGERPRINT_STATE_RUNNING);
        }
    }

    public boolean isUnlockWithFingerprintPossible(int userId) {
        return mFpm != null && mFpm.isHardwareDetected() && !isFingerprintDisabled(userId)
                && mFpm.getEnrolledFingerprints(userId).size() > 0;
    }

    private void stopListeningForFingerprint() {
        if (DEBUG) Log.v(TAG, "stopListeningForFingerprint()");
        if (mFingerprintRunningState == FINGERPRINT_STATE_RUNNING) {
            if (mFingerprintCancelSignal != null) {
                mFingerprintCancelSignal.cancel();
                mFingerprintCancelSignal = null;
            }
            setFingerprintRunningState(FINGERPRINT_STATE_CANCELLING);
        }
        if (mFingerprintRunningState == FINGERPRINT_STATE_CANCELLING_RESTARTING) {
            setFingerprintRunningState(FINGERPRINT_STATE_CANCELLING);
        }
    }

    private boolean isDeviceProvisionedInSettingsDb() {
        return Settings.Global.getInt(mContext.getContentResolver(),
                Settings.Global.DEVICE_PROVISIONED, 0) != 0;
    }

    private void watchForDeviceProvisioning() {
        mDeviceProvisionedObserver = new ContentObserver(mHandler) {
            @Override
            public void onChange(boolean selfChange) {
                super.onChange(selfChange);
                mDeviceProvisioned = isDeviceProvisionedInSettingsDb();
                if (mDeviceProvisioned) {
                    mHandler.sendEmptyMessage(MSG_DEVICE_PROVISIONED);
                }
                if (DEBUG) Log.d(TAG, "DEVICE_PROVISIONED state = " + mDeviceProvisioned);
            }
        };

        mContext.getContentResolver().registerContentObserver(
                Settings.Global.getUriFor(Settings.Global.DEVICE_PROVISIONED),
                false, mDeviceProvisionedObserver);

        // prevent a race condition between where we check the flag and where we register the
        // observer by grabbing the value once again...
        boolean provisioned = isDeviceProvisionedInSettingsDb();
        if (provisioned != mDeviceProvisioned) {
            mDeviceProvisioned = provisioned;
            if (mDeviceProvisioned) {
                mHandler.sendEmptyMessage(MSG_DEVICE_PROVISIONED);
            }
        }
    }

    
Update the state whether Keyguard currently has a lockscreen wallpaper.
Params:
hasLockscreenWallpaper – Whether Keyguard has a lockscreen wallpaper./**
     * Update the state whether Keyguard currently has a lockscreen wallpaper.
     *
     * @param hasLockscreenWallpaper Whether Keyguard has a lockscreen wallpaper.
     */
    public void setHasLockscreenWallpaper(boolean hasLockscreenWallpaper) {
        checkIsHandlerThread();
        if (hasLockscreenWallpaper != mHasLockscreenWallpaper) {
            mHasLockscreenWallpaper = hasLockscreenWallpaper;
            for (int i = mCallbacks.size() - 1; i >= 0; i--) {
                KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
                if (cb != null) {
                    cb.onHasLockscreenWallpaperChanged(hasLockscreenWallpaper);
                }
            }
        }
    }

    
Returns:
Whether Keyguard has a lockscreen wallpaper./**
     * @return Whether Keyguard has a lockscreen wallpaper.
     */
    public boolean hasLockscreenWallpaper() {
        return mHasLockscreenWallpaper;
    }

    
Handle MSG_DPM_STATE_CHANGED /**
     * Handle {@link #MSG_DPM_STATE_CHANGED}
     */
    private void handleDevicePolicyManagerStateChanged() {
        updateFingerprintListeningState();
        for (int i = mCallbacks.size() - 1; i >= 0; i--) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onDevicePolicyManagerStateChanged();
            }
        }
    }

    
Handle MSG_USER_SWITCHING /**
     * Handle {@link #MSG_USER_SWITCHING}
     */
    private void handleUserSwitching(int userId, IRemoteCallback reply) {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onUserSwitching(userId);
            }
        }
        try {
            reply.sendResult(null);
        } catch (RemoteException e) {
        }
    }

    
Handle MSG_USER_SWITCH_COMPLETE /**
     * Handle {@link #MSG_USER_SWITCH_COMPLETE}
     */
    private void handleUserSwitchComplete(int userId) {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onUserSwitchComplete(userId);
            }
        }
    }

    
This is exposed since Intent.ACTION_BOOT_COMPLETED is not sticky. If keyguard crashes sometime after boot, then it will never receive this broadcast and hence not handle the event. This method is ultimately called by PhoneWindowManager in this case. /**
     * This is exposed since {@link Intent#ACTION_BOOT_COMPLETED} is not sticky. If
     * keyguard crashes sometime after boot, then it will never receive this
     * broadcast and hence not handle the event. This method is ultimately called by
     * PhoneWindowManager in this case.
     */
    public void dispatchBootCompleted() {
        mHandler.sendEmptyMessage(MSG_BOOT_COMPLETED);
    }

    
Handle MSG_BOOT_COMPLETED /**
     * Handle {@link #MSG_BOOT_COMPLETED}
     */
    private void handleBootCompleted() {
        if (mBootCompleted) return;
        mBootCompleted = true;
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onBootCompleted();
            }
        }
    }

    
We need to store this state in the KeyguardUpdateMonitor since this class will not be
destroyed.
/**
     * We need to store this state in the KeyguardUpdateMonitor since this class will not be
     * destroyed.
     */
    public boolean hasBootCompleted() {
        return mBootCompleted;
    }

    
Handle MSG_DEVICE_PROVISIONED /**
     * Handle {@link #MSG_DEVICE_PROVISIONED}
     */
    private void handleDeviceProvisioned() {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onDeviceProvisioned();
            }
        }
        if (mDeviceProvisionedObserver != null) {
            // We don't need the observer anymore...
            mContext.getContentResolver().unregisterContentObserver(mDeviceProvisionedObserver);
            mDeviceProvisionedObserver = null;
        }
    }

    
Handle MSG_PHONE_STATE_CHANGED /**
     * Handle {@link #MSG_PHONE_STATE_CHANGED}
     */
    private void handlePhoneStateChanged(String newState) {
        if (DEBUG) Log.d(TAG, "handlePhoneStateChanged(" + newState + ")");
        if (TelephonyManager.EXTRA_STATE_IDLE.equals(newState)) {
            mPhoneState = TelephonyManager.CALL_STATE_IDLE;
        } else if (TelephonyManager.EXTRA_STATE_OFFHOOK.equals(newState)) {
            mPhoneState = TelephonyManager.CALL_STATE_OFFHOOK;
        } else if (TelephonyManager.EXTRA_STATE_RINGING.equals(newState)) {
            mPhoneState = TelephonyManager.CALL_STATE_RINGING;
        }
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onPhoneStateChanged(mPhoneState);
            }
        }
    }

    
Handle MSG_RINGER_MODE_CHANGED /**
     * Handle {@link #MSG_RINGER_MODE_CHANGED}
     */
    private void handleRingerModeChange(int mode) {
        if (DEBUG) Log.d(TAG, "handleRingerModeChange(" + mode + ")");
        mRingMode = mode;
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onRingerModeChanged(mode);
            }
        }
    }

    
Handle MSG_TIME_UPDATE /**
     * Handle {@link #MSG_TIME_UPDATE}
     */
    private void handleTimeUpdate() {
        if (DEBUG) Log.d(TAG, "handleTimeUpdate");
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onTimeChanged();
            }
        }
    }

    
Handle MSG_BATTERY_UPDATE /**
     * Handle {@link #MSG_BATTERY_UPDATE}
     */
    private void handleBatteryUpdate(BatteryStatus status) {
        if (DEBUG) Log.d(TAG, "handleBatteryUpdate");
        final boolean batteryUpdateInteresting = isBatteryUpdateInteresting(mBatteryStatus, status);
        mBatteryStatus = status;
        if (batteryUpdateInteresting) {
            for (int i = 0; i < mCallbacks.size(); i++) {
                KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
                if (cb != null) {
                    cb.onRefreshBatteryInfo(status);
                }
            }
        }
    }

    
Handle Telephony status during Boot for CarrierText display policy
/**
     * Handle Telephony status during Boot for CarrierText display policy
     */
    @VisibleForTesting
    void updateTelephonyCapable(boolean capable){
        if (capable == mTelephonyCapable) {
            return;
        }
        mTelephonyCapable = capable;
        for (WeakReference<KeyguardUpdateMonitorCallback> ref : mCallbacks) {
            KeyguardUpdateMonitorCallback cb = ref.get();
            if (cb != null) {
                cb.onTelephonyCapable(mTelephonyCapable);
            }
        }
    }

    
Handle MSG_SIM_STATE_CHANGE /**
     * Handle {@link #MSG_SIM_STATE_CHANGE}
     */
    @VisibleForTesting
    void handleSimStateChange(int subId, int slotId, State state) {
        checkIsHandlerThread();
        if (DEBUG_SIM_STATES) {
            Log.d(TAG, "handleSimStateChange(subId=" + subId + ", slotId="
                    + slotId + ", state=" + state +")");
        }

        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
            Log.w(TAG, "invalid subId in handleSimStateChange()");
            /* Only handle No SIM(ABSENT) due to handleServiceStateChange() handle other case */
            if (state == State.ABSENT) {
                updateTelephonyCapable(true);
            }
            return;
        }

        SimData data = mSimDatas.get(subId);
        final boolean changed;
        if (data == null) {
            data = new SimData(state, slotId, subId);
            mSimDatas.put(subId, data);
            changed = true; // no data yet; force update
        } else {
            changed = (data.simState != state || data.subId != subId || data.slotId != slotId);
            data.simState = state;
            data.subId = subId;
            data.slotId = slotId;
        }
        if (changed && state != State.UNKNOWN) {
            for (int i = 0; i < mCallbacks.size(); i++) {
                KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
                if (cb != null) {
                    cb.onSimStateChanged(subId, slotId, state);
                }
            }
        }
    }

    
Handle MSG_SERVICE_STATE_CHANGE /**
     * Handle {@link #MSG_SERVICE_STATE_CHANGE}
     */
    @VisibleForTesting
    void handleServiceStateChange(int subId, ServiceState serviceState) {
        if (DEBUG) {
            Log.d(TAG,
                    "handleServiceStateChange(subId=" + subId + ", serviceState=" + serviceState);
        }

        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
            Log.w(TAG, "invalid subId in handleServiceStateChange()");
            return;
        } else {
            updateTelephonyCapable(true);
        }

        mServiceStates.put(subId, serviceState);

        for (int j = 0; j < mCallbacks.size(); j++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(j).get();
            if (cb != null) {
                cb.onRefreshCarrierInfo();
            }
        }
    }

    public boolean isKeyguardVisible() {
        return mKeyguardIsVisible;
    }

    
Notifies that the visibility state of Keyguard has changed.
Needs to be called from the main thread.
/**
     * Notifies that the visibility state of Keyguard has changed.
     *
     * <p>Needs to be called from the main thread.
     */
    public void onKeyguardVisibilityChanged(boolean showing) {
        checkIsHandlerThread();
        if (DEBUG) Log.d(TAG, "onKeyguardVisibilityChanged(" + showing + ")");
        mKeyguardIsVisible = showing;
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onKeyguardVisibilityChangedRaw(showing);
            }
        }
        updateFingerprintListeningState();
    }

    
Handle MSG_KEYGUARD_RESET /**
     * Handle {@link #MSG_KEYGUARD_RESET}
     */
    private void handleKeyguardReset() {
        if (DEBUG) Log.d(TAG, "handleKeyguardReset");
        updateFingerprintListeningState();
        mNeedsSlowUnlockTransition = resolveNeedsSlowUnlockTransition();
    }

    private boolean resolveNeedsSlowUnlockTransition() {
        if (mUserManager.isUserUnlocked(getCurrentUser())) {
            return false;
        }
        Intent homeIntent = new Intent(Intent.ACTION_MAIN)
                .addCategory(Intent.CATEGORY_HOME);
        ResolveInfo resolveInfo = mContext.getPackageManager().resolveActivity(homeIntent,
                0 /* flags */);
        return FALLBACK_HOME_COMPONENT.equals(resolveInfo.getComponentInfo().getComponentName());
    }

    
Handle MSG_KEYGUARD_BOUNCER_CHANGED 
See Also:
sendKeyguardBouncerChanged(boolean)/**
     * Handle {@link #MSG_KEYGUARD_BOUNCER_CHANGED}
     * @see #sendKeyguardBouncerChanged(boolean)
     */
    private void handleKeyguardBouncerChanged(int bouncer) {
        if (DEBUG) Log.d(TAG, "handleKeyguardBouncerChanged(" + bouncer + ")");
        boolean isBouncer = (bouncer == 1);
        mBouncer = isBouncer;
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onKeyguardBouncerChanged(isBouncer);
            }
        }
        updateFingerprintListeningState();
    }

    
Handle MSG_REPORT_EMERGENCY_CALL_ACTION /**
     * Handle {@link #MSG_REPORT_EMERGENCY_CALL_ACTION}
     */
    private void handleReportEmergencyCallAction() {
        for (int i = 0; i < mCallbacks.size(); i++) {
            KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
            if (cb != null) {
                cb.onEmergencyCallAction();
            }
        }
    }

    private boolean isBatteryUpdateInteresting(BatteryStatus old, BatteryStatus current) {
        final boolean nowPluggedIn = current.isPluggedIn();
        final boolean wasPluggedIn = old.isPluggedIn();
        final boolean stateChangedWhilePluggedIn = wasPluggedIn && nowPluggedIn
            && (old.status != current.status);

        // change in plug state is always interesting
        if (wasPluggedIn != nowPluggedIn || stateChangedWhilePluggedIn) {
            return true;
        }

        // change in battery level
        if (old.level != current.level) {
            return true;
        }

        // change in charging current while plugged in
        if (nowPluggedIn && current.maxChargingWattage != old.maxChargingWattage) {
            return true;
        }

        return false;
    }

    
Remove the given observer's callback.
Params:
callback – The callback to remove/**
     * Remove the given observer's callback.
     *
     * @param callback The callback to remove
     */
    public void removeCallback(KeyguardUpdateMonitorCallback callback) {
        checkIsHandlerThread();
        if (DEBUG) Log.v(TAG, "*** unregister callback for " + callback);
        for (int i = mCallbacks.size() - 1; i >= 0; i--) {
            if (mCallbacks.get(i).get() == callback) {
                mCallbacks.remove(i);
            }
        }
    }

    
Register to receive notifications about general keyguard information (see InfoCallback. 
Params:
callback – The callback to register/**
     * Register to receive notifications about general keyguard information
     * (see {@link InfoCallback}.
     * @param callback The callback to register
     */
    public void registerCallback(KeyguardUpdateMonitorCallback callback) {
        checkIsHandlerThread();
        if (DEBUG) Log.v(TAG, "*** register callback for " + callback);
        // Prevent adding duplicate callbacks
        for (int i = 0; i < mCallbacks.size(); i++) {
            if (mCallbacks.get(i).get() == callback) {
                if (DEBUG) Log.e(TAG, "Object tried to add another callback",
                        new Exception("Called by"));
                return;
            }
        }
        mCallbacks.add(new WeakReference<KeyguardUpdateMonitorCallback>(callback));
        removeCallback(null); // remove unused references
        sendUpdates(callback);
    }

    public boolean isSwitchingUser() {
        return mSwitchingUser;
    }

    @AnyThread
    public void setSwitchingUser(boolean switching) {
        mSwitchingUser = switching;
        // Since this comes in on a binder thread, we need to post if first
        mHandler.post(mUpdateFingerprintListeningState);
    }

    private void sendUpdates(KeyguardUpdateMonitorCallback callback) {
        // Notify listener of the current state
        callback.onRefreshBatteryInfo(mBatteryStatus);
        callback.onTimeChanged();
        callback.onRingerModeChanged(mRingMode);
        callback.onPhoneStateChanged(mPhoneState);
        callback.onRefreshCarrierInfo();
        callback.onClockVisibilityChanged();
        callback.onKeyguardVisibilityChangedRaw(mKeyguardIsVisible);
        callback.onTelephonyCapable(mTelephonyCapable);
        for (Entry<Integer, SimData> data : mSimDatas.entrySet()) {
            final SimData state = data.getValue();
            callback.onSimStateChanged(state.subId, state.slotId, state.simState);
        }
    }

    public void sendKeyguardReset() {
        mHandler.obtainMessage(MSG_KEYGUARD_RESET).sendToTarget();
    }

    
See Also:
handleKeyguardBouncerChanged(int)/**
     * @see #handleKeyguardBouncerChanged(int)
     */
    public void sendKeyguardBouncerChanged(boolean showingBouncer) {
        if (DEBUG) Log.d(TAG, "sendKeyguardBouncerChanged(" + showingBouncer + ")");
        Message message = mHandler.obtainMessage(MSG_KEYGUARD_BOUNCER_CHANGED);
        message.arg1 = showingBouncer ? 1 : 0;
        message.sendToTarget();
    }

    
Report that the user successfully entered the SIM PIN or PUK/SIM PIN so we
have the information earlier than waiting for the intent
broadcast from the telephony code.
NOTE: Because handleSimStateChange() invokes callbacks immediately without going
through mHandler, this *must* be called from the UI thread.
/**
     * Report that the user successfully entered the SIM PIN or PUK/SIM PIN so we
     * have the information earlier than waiting for the intent
     * broadcast from the telephony code.
     *
     * NOTE: Because handleSimStateChange() invokes callbacks immediately without going
     * through mHandler, this *must* be called from the UI thread.
     */
    @MainThread
    public void reportSimUnlocked(int subId) {
        if (DEBUG_SIM_STATES) Log.v(TAG, "reportSimUnlocked(subId=" + subId + ")");
        int slotId = SubscriptionManager.getSlotIndex(subId);
        handleSimStateChange(subId, slotId, State.READY);
    }

    
Report that the emergency call button has been pressed and the emergency dialer is
about to be displayed.
Params:
bypassHandler – runs immediately.
NOTE: Must be called from UI thread if bypassHandler == true./**
     * Report that the emergency call button has been pressed and the emergency dialer is
     * about to be displayed.
     *
     * @param bypassHandler runs immediately.
     *
     * NOTE: Must be called from UI thread if bypassHandler == true.
     */
    public void reportEmergencyCallAction(boolean bypassHandler) {
        if (!bypassHandler) {
            mHandler.obtainMessage(MSG_REPORT_EMERGENCY_CALL_ACTION).sendToTarget();
        } else {
            checkIsHandlerThread();
            handleReportEmergencyCallAction();
        }
    }

    
Returns:
Whether the device is provisioned (whether they have gone through
  the setup wizard)/**
     * @return Whether the device is provisioned (whether they have gone through
     *   the setup wizard)
     */
    public boolean isDeviceProvisioned() {
        return mDeviceProvisioned;
    }

    public ServiceState getServiceState(int subId) {
        return mServiceStates.get(subId);
    }

    public void clearFingerprintRecognized() {
        mUserFingerprintAuthenticated.clear();
        mTrustManager.clearAllFingerprints();
    }

    public boolean isSimPinVoiceSecure() {
        // TODO: only count SIMs that handle voice
        return isSimPinSecure();
    }

    public boolean isSimPinSecure() {
        // True if any SIM is pin secure
        for (SubscriptionInfo info : getSubscriptionInfo(false /* forceReload */)) {
            if (isSimPinSecure(getSimState(info.getSubscriptionId()))) return true;
        }
        return false;
    }

    public State getSimState(int subId) {
        if (mSimDatas.containsKey(subId)) {
            return mSimDatas.get(subId).simState;
        } else {
            return State.UNKNOWN;
        }
    }

    private final SysUiTaskStackChangeListener
            mTaskStackListener = new SysUiTaskStackChangeListener() {
        @Override
        public void onTaskStackChangedBackground() {
            try {
                ActivityManager.StackInfo info = ActivityManager.getService().getStackInfo(
                        WINDOWING_MODE_UNDEFINED, ACTIVITY_TYPE_ASSISTANT);
                if (info == null) {
                    return;
                }
                mHandler.sendMessage(mHandler.obtainMessage(MSG_ASSISTANT_STACK_CHANGED,
                        info.visible));
            } catch (RemoteException e) {
                Log.e(TAG, "unable to check task stack", e);
            }
        }
    };

    
Returns:
true if and only if the state has changed for the specified slotId/**
     * @return true if and only if the state has changed for the specified {@code slotId}
     */
    private boolean refreshSimState(int subId, int slotId) {

        // This is awful. It exists because there are two APIs for getting the SIM status
        // that don't return the complete set of values and have different types. In Keyguard we
        // need IccCardConstants, but TelephonyManager would only give us
        // TelephonyManager.SIM_STATE*, so we retrieve it manually.
        final TelephonyManager tele = TelephonyManager.from(mContext);
        int simState =  tele.getSimState(slotId);
        State state;
        try {
            state = State.intToState(simState);
        } catch(IllegalArgumentException ex) {
            Log.w(TAG, "Unknown sim state: " + simState);
            state = State.UNKNOWN;
        }
        SimData data = mSimDatas.get(subId);
        final boolean changed;
        if (data == null) {
            data = new SimData(state, slotId, subId);
            mSimDatas.put(subId, data);
            changed = true; // no data yet; force update
        } else {
            changed = data.simState != state;
            data.simState = state;
        }
        return changed;
    }

    public static boolean isSimPinSecure(IccCardConstants.State state) {
        final IccCardConstants.State simState = state;
        return (simState == IccCardConstants.State.PIN_REQUIRED
                || simState == IccCardConstants.State.PUK_REQUIRED
                || simState == IccCardConstants.State.PERM_DISABLED);
    }

    public DisplayClientState getCachedDisplayClientState() {
        return mDisplayClientState;
    }

    // TODO: use these callbacks elsewhere in place of the existing notifyScreen*()
    // (KeyguardViewMediator, KeyguardHostView)
    public void dispatchStartedWakingUp() {
        synchronized (this) {
            mDeviceInteractive = true;
        }
        mHandler.sendEmptyMessage(MSG_STARTED_WAKING_UP);
    }

    public void dispatchStartedGoingToSleep(int why) {
        mHandler.sendMessage(mHandler.obtainMessage(MSG_STARTED_GOING_TO_SLEEP, why, 0));
    }

    public void dispatchFinishedGoingToSleep(int why) {
        synchronized(this) {
            mDeviceInteractive = false;
        }
        mHandler.sendMessage(mHandler.obtainMessage(MSG_FINISHED_GOING_TO_SLEEP, why, 0));
    }

    public void dispatchScreenTurnedOn() {
        synchronized (this) {
            mScreenOn = true;
        }
        mHandler.sendEmptyMessage(MSG_SCREEN_TURNED_ON);
    }

    public void dispatchScreenTurnedOff() {
        synchronized(this) {
            mScreenOn = false;
        }
        mHandler.sendEmptyMessage(MSG_SCREEN_TURNED_OFF);
    }

    public void dispatchDreamingStarted() {
        mHandler.sendMessage(mHandler.obtainMessage(MSG_DREAMING_STATE_CHANGED, 1, 0));
    }

    public void dispatchDreamingStopped() {
        mHandler.sendMessage(mHandler.obtainMessage(MSG_DREAMING_STATE_CHANGED, 0, 0));
    }

    public boolean isDeviceInteractive() {
        return mDeviceInteractive;
    }

    public boolean isGoingToSleep() {
        return mGoingToSleep;
    }

    
Find the next SubscriptionId for a SIM in the given state, favoring lower slot numbers first.
Params:
state – 
Returns:
subid or SubscriptionManager.INVALID_SUBSCRIPTION_ID if none found/**
     * Find the next SubscriptionId for a SIM in the given state, favoring lower slot numbers first.
     * @param state
     * @return subid or {@link SubscriptionManager#INVALID_SUBSCRIPTION_ID} if none found
     */
    public int getNextSubIdForState(State state) {
        List<SubscriptionInfo> list = getSubscriptionInfo(false /* forceReload */);
        int resultId = SubscriptionManager.INVALID_SUBSCRIPTION_ID;
        int bestSlotId = Integer.MAX_VALUE; // Favor lowest slot first
        for (int i = 0; i < list.size(); i++) {
            final SubscriptionInfo info = list.get(i);
            final int id = info.getSubscriptionId();
            int slotId = SubscriptionManager.getSlotIndex(id);
            if (state == getSimState(id) && bestSlotId > slotId ) {
                resultId = id;
                bestSlotId = slotId;
            }
        }
        return resultId;
    }

    public SubscriptionInfo getSubscriptionInfoForSubId(int subId) {
        List<SubscriptionInfo> list = getSubscriptionInfo(false /* forceReload */);
        for (int i = 0; i < list.size(); i++) {
            SubscriptionInfo info = list.get(i);
            if (subId == info.getSubscriptionId()) return info;
        }
        return null; // not found
    }

    
Returns:
a cached version of DevicePolicyManager.isLogoutEnabled()/**
     * @return a cached version of DevicePolicyManager.isLogoutEnabled()
     */
    public boolean isLogoutEnabled() {
        return mLogoutEnabled;
    }

    private void updateLogoutEnabled() {
        checkIsHandlerThread();
        boolean logoutEnabled = mDevicePolicyManager.isLogoutEnabled();
        if (mLogoutEnabled != logoutEnabled) {
            mLogoutEnabled = logoutEnabled;
            for (int i = 0; i < mCallbacks.size(); i++) {
                KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
                if (cb != null) {
                    cb.onLogoutEnabledChanged();
                }
            }
        }
    }

    private void checkIsHandlerThread() {
        if (sDisableHandlerCheckForTesting) {
            return;
        }
        if (!mHandler.getLooper().isCurrentThread()) {
            Log.wtf(TAG, "must call on mHandler's thread "
                    + mHandler.getLooper().getThread() + ", not " + Thread.currentThread());
        }
    }

    
Turn off the handler check for testing.
This is necessary because currently tests are not too careful about which thread they call
into this class on.
Note that this must be called before scheduling any work involving KeyguardUpdateMonitor
instances.
TODO: fix the tests and remove this.
/**
     * Turn off the handler check for testing.
     *
     * This is necessary because currently tests are not too careful about which thread they call
     * into this class on.
     *
     * Note that this must be called before scheduling any work involving KeyguardUpdateMonitor
     * instances.
     *
     * TODO: fix the tests and remove this.
     */
    @VisibleForTesting
    public static void disableHandlerCheckForTesting(Instrumentation instrumentation) {
        Preconditions.checkNotNull(instrumentation, "Must only call this method in tests!");
        // Don't need synchronization here *if* the callers follow the contract and call this only
        // before scheduling work for KeyguardUpdateMonitor on other threads, because the scheduling
        // of that work forces a happens-before relationship.
        sDisableHandlerCheckForTesting = true;
    }

    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        pw.println("KeyguardUpdateMonitor state:");
        pw.println("  SIM States:");
        for (SimData data : mSimDatas.values()) {
            pw.println("    " + data.toString());
        }
        pw.println("  Subs:");
        if (mSubscriptionInfo != null) {
            for (int i = 0; i < mSubscriptionInfo.size(); i++) {
                pw.println("    " + mSubscriptionInfo.get(i));
            }
        }
        pw.println("  Service states:");
        for (int subId : mServiceStates.keySet()) {
            pw.println("    " + subId + "=" + mServiceStates.get(subId));
        }
        if (mFpm != null && mFpm.isHardwareDetected()) {
            final int userId = ActivityManager.getCurrentUser();
            final int strongAuthFlags = mStrongAuthTracker.getStrongAuthForUser(userId);
            pw.println("  Fingerprint state (user=" + userId + ")");
            pw.println("    allowed=" + isUnlockingWithFingerprintAllowed());
            pw.println("    auth'd=" + mUserFingerprintAuthenticated.get(userId));
            pw.println("    authSinceBoot="
                    + getStrongAuthTracker().hasUserAuthenticatedSinceBoot());
            pw.println("    disabled(DPM)=" + isFingerprintDisabled(userId));
            pw.println("    possible=" + isUnlockWithFingerprintPossible(userId));
            pw.println("    strongAuthFlags=" + Integer.toHexString(strongAuthFlags));
            pw.println("    trustManaged=" + getUserTrustIsManaged(userId));
        }
    }
}