https://source.android.com/ 
/*
 * Copyright (C) 2017 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 android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.Nullable;
import android.content.Context;
import android.media.SessionToken2;
import android.media.session.MediaController;
import android.media.update.ApiLoader;
import android.media.update.MediaControlView2Provider;
import android.media.update.ViewGroupHelper;
import android.util.AttributeSet;
import android.view.View;

import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

// TODO: Use link annotation to refer VideoView2 once VideoView2 became unhidden.

@hide
A View that contains the controls for MediaPlayer2.
It provides a wide range of UI including buttons such as "Play/Pause", "Rewind", "Fast Forward",
"Subtitle", "Full Screen", and it is also possible to add multiple custom buttons.


 MediaControlView2 can be initialized in two different ways: 
1) When VideoView2 is initialized, it automatically initializes a MediaControlView2 instance and
adds it to the view.
2) Initialize MediaControlView2 programmatically and add it to a ViewGroup instance.
In the first option, VideoView2 automatically connects MediaControlView2 to MediaController,
which is necessary to communicate with MediaSession2. In the second option, however, the
developer needs to manually retrieve a MediaController instance and set it to MediaControlView2
by calling setController(MediaController controller).


There is no separate method that handles the show/hide behavior for MediaControlView2. Instead,
one can directly change the visibility of this view by calling View.setVisibility(int). The
values supported are View.VISIBLE and View.GONE.
In addition, the following customization is supported:
Set focus to the play/pause button by calling requestPlayButtonFocus().


It is also possible to add custom buttons with custom icons and actions inside MediaControlView2.
Those buttons will be shown when the overflow button is clicked.
See VideoView2#setCustomActions for more details on how to add.
/**
 * @hide
 * A View that contains the controls for MediaPlayer2.
 * It provides a wide range of UI including buttons such as "Play/Pause", "Rewind", "Fast Forward",
 * "Subtitle", "Full Screen", and it is also possible to add multiple custom buttons.
 *
 * <p>
 * <em> MediaControlView2 can be initialized in two different ways: </em>
 * 1) When VideoView2 is initialized, it automatically initializes a MediaControlView2 instance and
 * adds it to the view.
 * 2) Initialize MediaControlView2 programmatically and add it to a ViewGroup instance.
 *
 * In the first option, VideoView2 automatically connects MediaControlView2 to MediaController,
 * which is necessary to communicate with MediaSession2. In the second option, however, the
 * developer needs to manually retrieve a MediaController instance and set it to MediaControlView2
 * by calling setController(MediaController controller).
 *
 * <p>
 * There is no separate method that handles the show/hide behavior for MediaControlView2. Instead,
 * one can directly change the visibility of this view by calling View.setVisibility(int). The
 * values supported are View.VISIBLE and View.GONE.
 * In addition, the following customization is supported:
 * Set focus to the play/pause button by calling requestPlayButtonFocus().
 *
 * <p>
 * It is also possible to add custom buttons with custom icons and actions inside MediaControlView2.
 * Those buttons will be shown when the overflow button is clicked.
 * See VideoView2#setCustomActions for more details on how to add.
 */
public class MediaControlView2 extends ViewGroupHelper<MediaControlView2Provider> {
    
@hide
/** @hide */
    @IntDef({
            BUTTON_PLAY_PAUSE,
            BUTTON_FFWD,
            BUTTON_REW,
            BUTTON_NEXT,
            BUTTON_PREV,
            BUTTON_SUBTITLE,
            BUTTON_FULL_SCREEN,
            BUTTON_OVERFLOW,
            BUTTON_MUTE,
            BUTTON_ASPECT_RATIO,
            BUTTON_SETTINGS
    })
    @Retention(RetentionPolicy.SOURCE)
    public @interface Button {}

    
MediaControlView2 button value for playing and pausing media.

@hide
/**
     * MediaControlView2 button value for playing and pausing media.
     * @hide
     */
    public static final int BUTTON_PLAY_PAUSE = 1;
    
MediaControlView2 button value for jumping 30 seconds forward.

@hide
/**
     * MediaControlView2 button value for jumping 30 seconds forward.
     * @hide
     */
    public static final int BUTTON_FFWD = 2;
    
MediaControlView2 button value for jumping 10 seconds backward.

@hide
/**
     * MediaControlView2 button value for jumping 10 seconds backward.
     * @hide
     */
    public static final int BUTTON_REW = 3;
    
MediaControlView2 button value for jumping to next media.

@hide
/**
     * MediaControlView2 button value for jumping to next media.
     * @hide
     */
    public static final int BUTTON_NEXT = 4;
    
MediaControlView2 button value for jumping to previous media.

@hide
/**
     * MediaControlView2 button value for jumping to previous media.
     * @hide
     */
    public static final int BUTTON_PREV = 5;
    
MediaControlView2 button value for showing/hiding subtitle track.

@hide
/**
     * MediaControlView2 button value for showing/hiding subtitle track.
     * @hide
     */
    public static final int BUTTON_SUBTITLE = 6;
    
MediaControlView2 button value for toggling full screen.

@hide
/**
     * MediaControlView2 button value for toggling full screen.
     * @hide
     */
    public static final int BUTTON_FULL_SCREEN = 7;
    
MediaControlView2 button value for showing/hiding overflow buttons.

@hide
/**
     * MediaControlView2 button value for showing/hiding overflow buttons.
     * @hide
     */
    public static final int BUTTON_OVERFLOW = 8;
    
MediaControlView2 button value for muting audio.

@hide
/**
     * MediaControlView2 button value for muting audio.
     * @hide
     */
    public static final int BUTTON_MUTE = 9;
    
MediaControlView2 button value for adjusting aspect ratio of view.

@hide
/**
     * MediaControlView2 button value for adjusting aspect ratio of view.
     * @hide
     */
    public static final int BUTTON_ASPECT_RATIO = 10;
    
MediaControlView2 button value for showing/hiding settings page.

@hide
/**
     * MediaControlView2 button value for showing/hiding settings page.
     * @hide
     */
    public static final int BUTTON_SETTINGS = 11;

    public MediaControlView2(@NonNull Context context) {
        this(context, null);
    }

    public MediaControlView2(@NonNull Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public MediaControlView2(@NonNull Context context, @Nullable AttributeSet attrs,
            int defStyleAttr) {
        this(context, attrs, defStyleAttr, 0);
    }

    public MediaControlView2(@NonNull Context context, @Nullable AttributeSet attrs,
            int defStyleAttr, int defStyleRes) {
        super((instance, superProvider, privateProvider) ->
                ApiLoader.getProvider().createMediaControlView2(
                        (MediaControlView2) instance, superProvider, privateProvider,
                        attrs, defStyleAttr, defStyleRes),
                context, attrs, defStyleAttr, defStyleRes);
        mProvider.initialize(attrs, defStyleAttr, defStyleRes);
    }

    
Sets MediaSession2 token to control corresponding MediaSession2.

/**
     * Sets MediaSession2 token to control corresponding MediaSession2.
     */
    public void setMediaSessionToken(SessionToken2 token) {
        mProvider.setMediaSessionToken_impl(token);
    }

    
Registers a callback to be invoked when the fullscreen mode should be changed.

Params:
  • l – The callback that will be run
/**
     * Registers a callback to be invoked when the fullscreen mode should be changed.
     * @param l The callback that will be run
     */
    public void setOnFullScreenListener(OnFullScreenListener l) {
        mProvider.setOnFullScreenListener_impl(l);
    }

    
@hideTODO: remove once the implementation is revised
/**
     * @hide TODO: remove once the implementation is revised
     */
    public void setController(MediaController controller) {
        mProvider.setController_impl(controller);
    }

    
Changes the visibility state of an individual button. Default value is View.Visible.

Params:
@hide
/**
     * Changes the visibility state of an individual button. Default value is View.Visible.
     *
     * @param button the {@code Button} assigned to individual buttons
     * <ul>
     * <li>{@link #BUTTON_PLAY_PAUSE}
     * <li>{@link #BUTTON_FFWD}
     * <li>{@link #BUTTON_REW}
     * <li>{@link #BUTTON_NEXT}
     * <li>{@link #BUTTON_PREV}
     * <li>{@link #BUTTON_SUBTITLE}
     * <li>{@link #BUTTON_FULL_SCREEN}
     * <li>{@link #BUTTON_MUTE}
     * <li>{@link #BUTTON_OVERFLOW}
     * <li>{@link #BUTTON_ASPECT_RATIO}
     * <li>{@link #BUTTON_SETTINGS}
     * </ul>
     * @param visibility One of {@link #VISIBLE}, {@link #INVISIBLE}, or {@link #GONE}.
     * @hide
     */
    public void setButtonVisibility(@Button int button, @Visibility int visibility) {
        mProvider.setButtonVisibility_impl(button, visibility);
    }

    
 Requests focus for the play/pause button.

/**
     *  Requests focus for the play/pause button.
     */
    public void requestPlayButtonFocus() {
        mProvider.requestPlayButtonFocus_impl();
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        mProvider.onLayout_impl(changed, l, t, r, b);
    }

    
Interface definition of a callback to be invoked to inform the fullscreen mode is changed.
Application should handle the fullscreen mode accordingly.

/**
     * Interface definition of a callback to be invoked to inform the fullscreen mode is changed.
     * Application should handle the fullscreen mode accordingly.
     */
    public interface OnFullScreenListener {
        
Called to indicate a fullscreen mode change.

/**
         * Called to indicate a fullscreen mode change.
         */
        void onFullScreen(View view, boolean fullScreen);
    }
}