Java tutorial
/* * Copyright (C) 2006 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.NonNull; import android.annotation.UnsupportedAppUsage; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.res.Resources; import android.graphics.Canvas; import android.media.AudioAttributes; import android.media.AudioManager; import android.media.Cea708CaptionRenderer; import android.media.ClosedCaptionRenderer; import android.media.MediaFormat; import android.media.MediaPlayer; import android.media.MediaPlayer.OnCompletionListener; import android.media.MediaPlayer.OnErrorListener; import android.media.MediaPlayer.OnInfoListener; import android.media.Metadata; import android.media.SubtitleController; import android.media.SubtitleTrack.RenderingWidget; import android.media.TtmlRenderer; import android.media.WebVttRenderer; import android.net.Uri; import android.os.Build; import android.os.Looper; import android.util.AttributeSet; import android.util.Log; import android.util.Pair; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.widget.MediaController.MediaPlayerControl; import java.io.IOException; import java.io.InputStream; import java.util.Map; import java.util.Vector; /** * Displays a video file. The VideoView class * can load images from various sources (such as resources or content * providers), takes care of computing its measurement from the video so that * it can be used in any layout manager, and provides various display options * such as scaling and tinting.<p> * * <em>Note: VideoView does not retain its full state when going into the * background.</em> In particular, it does not restore the current play state, * play position, selected tracks, or any subtitle tracks added via * {@link #addSubtitleSource addSubtitleSource()}. Applications should * save and restore these on their own in * {@link android.app.Activity#onSaveInstanceState} and * {@link android.app.Activity#onRestoreInstanceState}.<p> * Also note that the audio session id (from {@link #getAudioSessionId}) may * change from its previously returned value when the VideoView is restored. * <p> * By default, VideoView requests audio focus with {@link AudioManager#AUDIOFOCUS_GAIN}. Use * {@link #setAudioFocusRequest(int)} to change this behavior. * <p> * The default {@link AudioAttributes} used during playback have a usage of * {@link AudioAttributes#USAGE_MEDIA} and a content type of * {@link AudioAttributes#CONTENT_TYPE_MOVIE}, use {@link #setAudioAttributes(AudioAttributes)} to * modify them. */ public class VideoView extends SurfaceView implements MediaPlayerControl, SubtitleController.Anchor { private static final String TAG = "VideoView"; // all possible internal states private static final int STATE_ERROR = -1; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private static final int STATE_IDLE = 0; private static final int STATE_PREPARING = 1; private static final int STATE_PREPARED = 2; private static final int STATE_PLAYING = 3; private static final int STATE_PAUSED = 4; private static final int STATE_PLAYBACK_COMPLETED = 5; private final Vector<Pair<InputStream, MediaFormat>> mPendingSubtitleTracks = new Vector<>(); // settable by the client @UnsupportedAppUsage private Uri mUri; @UnsupportedAppUsage private Map<String, String> mHeaders; // mCurrentState is a VideoView object's current state. // mTargetState is the state that a method caller intends to reach. // For instance, regardless the VideoView object's current state, // calling pause() intends to bring the object to a target state // of STATE_PAUSED. @UnsupportedAppUsage private int mCurrentState = STATE_IDLE; @UnsupportedAppUsage private int mTargetState = STATE_IDLE; // All the stuff we need for playing and showing a video @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private SurfaceHolder mSurfaceHolder = null; @UnsupportedAppUsage private MediaPlayer mMediaPlayer = null; private int mAudioSession; @UnsupportedAppUsage private int mVideoWidth; @UnsupportedAppUsage private int mVideoHeight; private int mSurfaceWidth; private int mSurfaceHeight; @UnsupportedAppUsage private MediaController mMediaController; private OnCompletionListener mOnCompletionListener; private MediaPlayer.OnPreparedListener mOnPreparedListener; @UnsupportedAppUsage private int mCurrentBufferPercentage; private OnErrorListener mOnErrorListener; private OnInfoListener mOnInfoListener; private int mSeekWhenPrepared; // recording the seek position while preparing private boolean mCanPause; private boolean mCanSeekBack; private boolean mCanSeekForward; private AudioManager mAudioManager; private int mAudioFocusType = AudioManager.AUDIOFOCUS_GAIN; // legacy focus gain private AudioAttributes mAudioAttributes; /** Subtitle rendering widget overlaid on top of the video. */ private RenderingWidget mSubtitleWidget; /** Listener for changes to subtitle data, used to redraw when needed. */ private RenderingWidget.OnChangedListener mSubtitlesChangedListener; public VideoView(Context context) { this(context, null); } public VideoView(Context context, AttributeSet attrs) { this(context, attrs, 0); } public VideoView(Context context, AttributeSet attrs, int defStyleAttr) { this(context, attrs, defStyleAttr, 0); } public VideoView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) { super(context, attrs, defStyleAttr, defStyleRes); mVideoWidth = 0; mVideoHeight = 0; mAudioManager = (AudioManager) mContext.getSystemService(Context.AUDIO_SERVICE); mAudioAttributes = new AudioAttributes.Builder().setUsage(AudioAttributes.USAGE_MEDIA) .setContentType(AudioAttributes.CONTENT_TYPE_MOVIE).build(); getHolder().addCallback(mSHCallback); getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); setFocusable(true); setFocusableInTouchMode(true); requestFocus(); mCurrentState = STATE_IDLE; mTargetState = STATE_IDLE; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { //Log.i("@@@@", "onMeasure(" + MeasureSpec.toString(widthMeasureSpec) + ", " // + MeasureSpec.toString(heightMeasureSpec) + ")"); int width = getDefaultSize(mVideoWidth, widthMeasureSpec); int height = getDefaultSize(mVideoHeight, heightMeasureSpec); if (mVideoWidth > 0 && mVideoHeight > 0) { int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); if (widthSpecMode == MeasureSpec.EXACTLY && heightSpecMode == MeasureSpec.EXACTLY) { // the size is fixed width = widthSpecSize; height = heightSpecSize; // for compatibility, we adjust size based on aspect ratio if (mVideoWidth * height < width * mVideoHeight) { //Log.i("@@@", "image too wide, correcting"); width = height * mVideoWidth / mVideoHeight; } else if (mVideoWidth * height > width * mVideoHeight) { //Log.i("@@@", "image too tall, correcting"); height = width * mVideoHeight / mVideoWidth; } } else if (widthSpecMode == MeasureSpec.EXACTLY) { // only the width is fixed, adjust the height to match aspect ratio if possible width = widthSpecSize; height = width * mVideoHeight / mVideoWidth; if (heightSpecMode == MeasureSpec.AT_MOST && height > heightSpecSize) { // couldn't match aspect ratio within the constraints height = heightSpecSize; } } else if (heightSpecMode == MeasureSpec.EXACTLY) { // only the height is fixed, adjust the width to match aspect ratio if possible height = heightSpecSize; width = height * mVideoWidth / mVideoHeight; if (widthSpecMode == MeasureSpec.AT_MOST && width > widthSpecSize) { // couldn't match aspect ratio within the constraints width = widthSpecSize; } } else { // neither the width nor the height are fixed, try to use actual video size width = mVideoWidth; height = mVideoHeight; if (heightSpecMode == MeasureSpec.AT_MOST && height > heightSpecSize) { // too tall, decrease both width and height height = heightSpecSize; width = height * mVideoWidth / mVideoHeight; } if (widthSpecMode == MeasureSpec.AT_MOST && width > widthSpecSize) { // too wide, decrease both width and height width = widthSpecSize; height = width * mVideoHeight / mVideoWidth; } } } else { // no size yet, just adopt the given spec sizes } setMeasuredDimension(width, height); } @Override public CharSequence getAccessibilityClassName() { return VideoView.class.getName(); } public int resolveAdjustedSize(int desiredSize, int measureSpec) { return getDefaultSize(desiredSize, measureSpec); } /** * Sets video path. * * @param path the path of the video. */ public void setVideoPath(String path) { setVideoURI(Uri.parse(path)); } /** * Sets video URI. * * @param uri the URI of the video. */ public void setVideoURI(Uri uri) { setVideoURI(uri, null); } /** * Sets video URI using specific headers. * * @param uri the URI of the video. * @param headers the headers for the URI request. * Note that the cross domain redirection is allowed by default, but that can be * changed with key/value pairs through the headers parameter with * "android-allow-cross-domain-redirect" as the key and "0" or "1" as the value * to disallow or allow cross domain redirection. */ public void setVideoURI(Uri uri, Map<String, String> headers) { mUri = uri; mHeaders = headers; mSeekWhenPrepared = 0; openVideo(); requestLayout(); invalidate(); } /** * Sets which type of audio focus will be requested during the playback, or configures playback * to not request audio focus. Valid values for focus requests are * {@link AudioManager#AUDIOFOCUS_GAIN}, {@link AudioManager#AUDIOFOCUS_GAIN_TRANSIENT}, * {@link AudioManager#AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK}, and * {@link AudioManager#AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE}. Or use * {@link AudioManager#AUDIOFOCUS_NONE} to express that audio focus should not be * requested when playback starts. You can for instance use this when playing a silent animation * through this class, and you don't want to affect other audio applications playing in the * background. * @param focusGain the type of audio focus gain that will be requested, or * {@link AudioManager#AUDIOFOCUS_NONE} to disable the use audio focus during playback. */ public void setAudioFocusRequest(int focusGain) { if (focusGain != AudioManager.AUDIOFOCUS_NONE && focusGain != AudioManager.AUDIOFOCUS_GAIN && focusGain != AudioManager.AUDIOFOCUS_GAIN_TRANSIENT && focusGain != AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK && focusGain != AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_EXCLUSIVE) { throw new IllegalArgumentException("Illegal audio focus type " + focusGain); } mAudioFocusType = focusGain; } /** * Sets the {@link AudioAttributes} to be used during the playback of the video. * @param attributes non-null <code>AudioAttributes</code>. */ public void setAudioAttributes(@NonNull AudioAttributes attributes) { if (attributes == null) { throw new IllegalArgumentException("Illegal null AudioAttributes"); } mAudioAttributes = attributes; } /** * Adds an external subtitle source file (from the provided input stream.) * * Note that a single external subtitle source may contain multiple or no * supported tracks in it. If the source contained at least one track in * it, one will receive an {@link MediaPlayer#MEDIA_INFO_METADATA_UPDATE} * info message. Otherwise, if reading the source takes excessive time, * one will receive a {@link MediaPlayer#MEDIA_INFO_SUBTITLE_TIMED_OUT} * message. If the source contained no supported track (including an empty * source file or null input stream), one will receive a {@link * MediaPlayer#MEDIA_INFO_UNSUPPORTED_SUBTITLE} message. One can find the * total number of available tracks using {@link MediaPlayer#getTrackInfo()} * to see what additional tracks become available after this method call. * * @param is input stream containing the subtitle data. It will be * closed by the media framework. * @param format the format of the subtitle track(s). Must contain at least * the mime type ({@link MediaFormat#KEY_MIME}) and the * language ({@link MediaFormat#KEY_LANGUAGE}) of the file. * If the file itself contains the language information, * specify "und" for the language. */ public void addSubtitleSource(InputStream is, MediaFormat format) { if (mMediaPlayer == null) { mPendingSubtitleTracks.add(Pair.create(is, format)); } else { try { mMediaPlayer.addSubtitleSource(is, format); } catch (IllegalStateException e) { mInfoListener.onInfo(mMediaPlayer, MediaPlayer.MEDIA_INFO_UNSUPPORTED_SUBTITLE, 0); } } } public void stopPlayback() { if (mMediaPlayer != null) { mMediaPlayer.stop(); mMediaPlayer.release(); mMediaPlayer = null; mCurrentState = STATE_IDLE; mTargetState = STATE_IDLE; mAudioManager.abandonAudioFocus(null); } } private void openVideo() { if (mUri == null || mSurfaceHolder == null) { // not ready for playback just yet, will try again later return; } // we shouldn't clear the target state, because somebody might have // called start() previously release(false); if (mAudioFocusType != AudioManager.AUDIOFOCUS_NONE) { // TODO this should have a focus listener mAudioManager.requestAudioFocus(null, mAudioAttributes, mAudioFocusType, 0 /*flags*/); } try { mMediaPlayer = new MediaPlayer(); // TODO: create SubtitleController in MediaPlayer, but we need // a context for the subtitle renderers final Context context = getContext(); final SubtitleController controller = new SubtitleController(context, mMediaPlayer.getMediaTimeProvider(), mMediaPlayer); controller.registerRenderer(new WebVttRenderer(context)); controller.registerRenderer(new TtmlRenderer(context)); controller.registerRenderer(new Cea708CaptionRenderer(context)); controller.registerRenderer(new ClosedCaptionRenderer(context)); mMediaPlayer.setSubtitleAnchor(controller, this); if (mAudioSession != 0) { mMediaPlayer.setAudioSessionId(mAudioSession); } else { mAudioSession = mMediaPlayer.getAudioSessionId(); } mMediaPlayer.setOnPreparedListener(mPreparedListener); mMediaPlayer.setOnVideoSizeChangedListener(mSizeChangedListener); mMediaPlayer.setOnCompletionListener(mCompletionListener); mMediaPlayer.setOnErrorListener(mErrorListener); mMediaPlayer.setOnInfoListener(mInfoListener); mMediaPlayer.setOnBufferingUpdateListener(mBufferingUpdateListener); mCurrentBufferPercentage = 0; mMediaPlayer.setDataSource(mContext, mUri, mHeaders); mMediaPlayer.setDisplay(mSurfaceHolder); mMediaPlayer.setAudioAttributes(mAudioAttributes); mMediaPlayer.setScreenOnWhilePlaying(true); mMediaPlayer.prepareAsync(); for (Pair<InputStream, MediaFormat> pending : mPendingSubtitleTracks) { try { mMediaPlayer.addSubtitleSource(pending.first, pending.second); } catch (IllegalStateException e) { mInfoListener.onInfo(mMediaPlayer, MediaPlayer.MEDIA_INFO_UNSUPPORTED_SUBTITLE, 0); } } // we don't set the target state here either, but preserve the // target state that was there before. mCurrentState = STATE_PREPARING; attachMediaController(); } catch (IOException ex) { Log.w(TAG, "Unable to open content: " + mUri, ex); mCurrentState = STATE_ERROR; mTargetState = STATE_ERROR; mErrorListener.onError(mMediaPlayer, MediaPlayer.MEDIA_ERROR_UNKNOWN, 0); return; } catch (IllegalArgumentException ex) { Log.w(TAG, "Unable to open content: " + mUri, ex); mCurrentState = STATE_ERROR; mTargetState = STATE_ERROR; mErrorListener.onError(mMediaPlayer, MediaPlayer.MEDIA_ERROR_UNKNOWN, 0); return; } finally { mPendingSubtitleTracks.clear(); } } public void setMediaController(MediaController controller) { if (mMediaController != null) { mMediaController.hide(); } mMediaController = controller; attachMediaController(); } private void attachMediaController() { if (mMediaPlayer != null && mMediaController != null) { mMediaController.setMediaPlayer(this); View anchorView = this.getParent() instanceof View ? (View) this.getParent() : this; mMediaController.setAnchorView(anchorView); mMediaController.setEnabled(isInPlaybackState()); } } MediaPlayer.OnVideoSizeChangedListener mSizeChangedListener = new MediaPlayer.OnVideoSizeChangedListener() { public void onVideoSizeChanged(MediaPlayer mp, int width, int height) { mVideoWidth = mp.getVideoWidth(); mVideoHeight = mp.getVideoHeight(); if (mVideoWidth != 0 && mVideoHeight != 0) { getHolder().setFixedSize(mVideoWidth, mVideoHeight); requestLayout(); } } }; @UnsupportedAppUsage MediaPlayer.OnPreparedListener mPreparedListener = new MediaPlayer.OnPreparedListener() { public void onPrepared(MediaPlayer mp) { mCurrentState = STATE_PREPARED; // Get the capabilities of the player for this stream Metadata data = mp.getMetadata(MediaPlayer.METADATA_ALL, MediaPlayer.BYPASS_METADATA_FILTER); if (data != null) { mCanPause = !data.has(Metadata.PAUSE_AVAILABLE) || data.getBoolean(Metadata.PAUSE_AVAILABLE); mCanSeekBack = !data.has(Metadata.SEEK_BACKWARD_AVAILABLE) || data.getBoolean(Metadata.SEEK_BACKWARD_AVAILABLE); mCanSeekForward = !data.has(Metadata.SEEK_FORWARD_AVAILABLE) || data.getBoolean(Metadata.SEEK_FORWARD_AVAILABLE); } else { mCanPause = mCanSeekBack = mCanSeekForward = true; } if (mOnPreparedListener != null) { mOnPreparedListener.onPrepared(mMediaPlayer); } if (mMediaController != null) { mMediaController.setEnabled(true); } mVideoWidth = mp.getVideoWidth(); mVideoHeight = mp.getVideoHeight(); int seekToPosition = mSeekWhenPrepared; // mSeekWhenPrepared may be changed after seekTo() call if (seekToPosition != 0) { seekTo(seekToPosition); } if (mVideoWidth != 0 && mVideoHeight != 0) { //Log.i("@@@@", "video size: " + mVideoWidth +"/"+ mVideoHeight); getHolder().setFixedSize(mVideoWidth, mVideoHeight); if (mSurfaceWidth == mVideoWidth && mSurfaceHeight == mVideoHeight) { // We didn't actually change the size (it was already at the size // we need), so we won't get a "surface changed" callback, so // start the video here instead of in the callback. if (mTargetState == STATE_PLAYING) { start(); if (mMediaController != null) { mMediaController.show(); } } else if (!isPlaying() && (seekToPosition != 0 || getCurrentPosition() > 0)) { if (mMediaController != null) { // Show the media controls when we're paused into a video and make 'em stick. mMediaController.show(0); } } } } else { // We don't know the video size yet, but should start anyway. // The video size might be reported to us later. if (mTargetState == STATE_PLAYING) { start(); } } } }; private MediaPlayer.OnCompletionListener mCompletionListener = new MediaPlayer.OnCompletionListener() { public void onCompletion(MediaPlayer mp) { mCurrentState = STATE_PLAYBACK_COMPLETED; mTargetState = STATE_PLAYBACK_COMPLETED; if (mMediaController != null) { mMediaController.hide(); } if (mOnCompletionListener != null) { mOnCompletionListener.onCompletion(mMediaPlayer); } if (mAudioFocusType != AudioManager.AUDIOFOCUS_NONE) { mAudioManager.abandonAudioFocus(null); } } }; private MediaPlayer.OnInfoListener mInfoListener = new MediaPlayer.OnInfoListener() { public boolean onInfo(MediaPlayer mp, int arg1, int arg2) { if (mOnInfoListener != null) { mOnInfoListener.onInfo(mp, arg1, arg2); } return true; } }; @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023) private MediaPlayer.OnErrorListener mErrorListener = new MediaPlayer.OnErrorListener() { public boolean onError(MediaPlayer mp, int framework_err, int impl_err) { Log.d(TAG, "Error: " + framework_err + "," + impl_err); mCurrentState = STATE_ERROR; mTargetState = STATE_ERROR; if (mMediaController != null) { mMediaController.hide(); } /* If an error handler has been supplied, use it and finish. */ if (mOnErrorListener != null) { if (mOnErrorListener.onError(mMediaPlayer, framework_err, impl_err)) { return true; } } /* Otherwise, pop up an error dialog so the user knows that * something bad has happened. Only try and pop up the dialog * if we're attached to a window. When we're going away and no * longer have a window, don't bother showing the user an error. */ if (getWindowToken() != null) { Resources r = mContext.getResources(); int messageId; if (framework_err == MediaPlayer.MEDIA_ERROR_NOT_VALID_FOR_PROGRESSIVE_PLAYBACK) { messageId = com.android.internal.R.string.VideoView_error_text_invalid_progressive_playback; } else { messageId = com.android.internal.R.string.VideoView_error_text_unknown; } new AlertDialog.Builder(mContext).setMessage(messageId) .setPositiveButton(com.android.internal.R.string.VideoView_error_button, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { /* If we get here, there is no onError listener, so * at least inform them that the video is over. */ if (mOnCompletionListener != null) { mOnCompletionListener.onCompletion(mMediaPlayer); } } }) .setCancelable(false).show(); } return true; } }; private MediaPlayer.OnBufferingUpdateListener mBufferingUpdateListener = new MediaPlayer.OnBufferingUpdateListener() { public void onBufferingUpdate(MediaPlayer mp, int percent) { mCurrentBufferPercentage = percent; } }; /** * Register a callback to be invoked when the media file * is loaded and ready to go. * * @param l The callback that will be run */ public void setOnPreparedListener(MediaPlayer.OnPreparedListener l) { mOnPreparedListener = l; } /** * Register a callback to be invoked when the end of a media file * has been reached during playback. * * @param l The callback that will be run */ public void setOnCompletionListener(OnCompletionListener l) { mOnCompletionListener = l; } /** * Register a callback to be invoked when an error occurs * during playback or setup. If no listener is specified, * or if the listener returned false, VideoView will inform * the user of any errors. * * @param l The callback that will be run */ public void setOnErrorListener(OnErrorListener l) { mOnErrorListener = l; } /** * Register a callback to be invoked when an informational event * occurs during playback or setup. * * @param l The callback that will be run */ public void setOnInfoListener(OnInfoListener l) { mOnInfoListener = l; } @UnsupportedAppUsage SurfaceHolder.Callback mSHCallback = new SurfaceHolder.Callback() { public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { mSurfaceWidth = w; mSurfaceHeight = h; boolean isValidState = (mTargetState == STATE_PLAYING); boolean hasValidSize = (mVideoWidth == w && mVideoHeight == h); if (mMediaPlayer != null && isValidState && hasValidSize) { if (mSeekWhenPrepared != 0) { seekTo(mSeekWhenPrepared); } start(); } } public void surfaceCreated(SurfaceHolder holder) { mSurfaceHolder = holder; openVideo(); } public void surfaceDestroyed(SurfaceHolder holder) { // after we return from this we can't use the surface any more mSurfaceHolder = null; if (mMediaController != null) mMediaController.hide(); release(true); } }; /* * release the media player in any state */ @UnsupportedAppUsage private void release(boolean cleartargetstate) { if (mMediaPlayer != null) { mMediaPlayer.reset(); mMediaPlayer.release(); mMediaPlayer = null; mPendingSubtitleTracks.clear(); mCurrentState = STATE_IDLE; if (cleartargetstate) { mTargetState = STATE_IDLE; } if (mAudioFocusType != AudioManager.AUDIOFOCUS_NONE) { mAudioManager.abandonAudioFocus(null); } } } @Override public boolean onTouchEvent(MotionEvent ev) { if (ev.getAction() == MotionEvent.ACTION_DOWN && isInPlaybackState() && mMediaController != null) { toggleMediaControlsVisiblity(); } return super.onTouchEvent(ev); } @Override public boolean onTrackballEvent(MotionEvent ev) { if (ev.getAction() == MotionEvent.ACTION_DOWN && isInPlaybackState() && mMediaController != null) { toggleMediaControlsVisiblity(); } return super.onTrackballEvent(ev); } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { boolean isKeyCodeSupported = keyCode != KeyEvent.KEYCODE_BACK && keyCode != KeyEvent.KEYCODE_VOLUME_UP && keyCode != KeyEvent.KEYCODE_VOLUME_DOWN && keyCode != KeyEvent.KEYCODE_VOLUME_MUTE && keyCode != KeyEvent.KEYCODE_MENU && keyCode != KeyEvent.KEYCODE_CALL && keyCode != KeyEvent.KEYCODE_ENDCALL; if (isInPlaybackState() && isKeyCodeSupported && mMediaController != null) { if (keyCode == KeyEvent.KEYCODE_HEADSETHOOK || keyCode == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE) { if (mMediaPlayer.isPlaying()) { pause(); mMediaController.show(); } else { start(); mMediaController.hide(); } return true; } else if (keyCode == KeyEvent.KEYCODE_MEDIA_PLAY) { if (!mMediaPlayer.isPlaying()) { start(); mMediaController.hide(); } return true; } else if (keyCode == KeyEvent.KEYCODE_MEDIA_STOP || keyCode == KeyEvent.KEYCODE_MEDIA_PAUSE) { if (mMediaPlayer.isPlaying()) { pause(); mMediaController.show(); } return true; } else { toggleMediaControlsVisiblity(); } } return super.onKeyDown(keyCode, event); } private void toggleMediaControlsVisiblity() { if (mMediaController.isShowing()) { mMediaController.hide(); } else { mMediaController.show(); } } @Override public void start() { if (isInPlaybackState()) { mMediaPlayer.start(); mCurrentState = STATE_PLAYING; } mTargetState = STATE_PLAYING; } @Override public void pause() { if (isInPlaybackState()) { if (mMediaPlayer.isPlaying()) { mMediaPlayer.pause(); mCurrentState = STATE_PAUSED; } } mTargetState = STATE_PAUSED; } public void suspend() { release(false); } public void resume() { openVideo(); } @Override public int getDuration() { if (isInPlaybackState()) { return mMediaPlayer.getDuration(); } return -1; } @Override public int getCurrentPosition() { if (isInPlaybackState()) { return mMediaPlayer.getCurrentPosition(); } return 0; } @Override public void seekTo(int msec) { if (isInPlaybackState()) { mMediaPlayer.seekTo(msec); mSeekWhenPrepared = 0; } else { mSeekWhenPrepared = msec; } } @Override public boolean isPlaying() { return isInPlaybackState() && mMediaPlayer.isPlaying(); } @Override public int getBufferPercentage() { if (mMediaPlayer != null) { return mCurrentBufferPercentage; } return 0; } private boolean isInPlaybackState() { return (mMediaPlayer != null && mCurrentState != STATE_ERROR && mCurrentState != STATE_IDLE && mCurrentState != STATE_PREPARING); } @Override public boolean canPause() { return mCanPause; } @Override public boolean canSeekBackward() { return mCanSeekBack; } @Override public boolean canSeekForward() { return mCanSeekForward; } @Override public int getAudioSessionId() { if (mAudioSession == 0) { MediaPlayer foo = new MediaPlayer(); mAudioSession = foo.getAudioSessionId(); foo.release(); } return mAudioSession; } @Override protected void onAttachedToWindow() { super.onAttachedToWindow(); if (mSubtitleWidget != null) { mSubtitleWidget.onAttachedToWindow(); } } @Override protected void onDetachedFromWindow() { super.onDetachedFromWindow(); if (mSubtitleWidget != null) { mSubtitleWidget.onDetachedFromWindow(); } } @Override protected void onLayout(boolean changed, int left, int top, int right, int bottom) { super.onLayout(changed, left, top, right, bottom); if (mSubtitleWidget != null) { measureAndLayoutSubtitleWidget(); } } @Override public void draw(Canvas canvas) { super.draw(canvas); if (mSubtitleWidget != null) { final int saveCount = canvas.save(); canvas.translate(getPaddingLeft(), getPaddingTop()); mSubtitleWidget.draw(canvas); canvas.restoreToCount(saveCount); } } /** * Forces a measurement and layout pass for all overlaid views. * * @see #setSubtitleWidget(RenderingWidget) */ private void measureAndLayoutSubtitleWidget() { final int width = getWidth() - getPaddingLeft() - getPaddingRight(); final int height = getHeight() - getPaddingTop() - getPaddingBottom(); mSubtitleWidget.setSize(width, height); } /** @hide */ @Override public void setSubtitleWidget(RenderingWidget subtitleWidget) { if (mSubtitleWidget == subtitleWidget) { return; } final boolean attachedToWindow = isAttachedToWindow(); if (mSubtitleWidget != null) { if (attachedToWindow) { mSubtitleWidget.onDetachedFromWindow(); } mSubtitleWidget.setOnChangedListener(null); } mSubtitleWidget = subtitleWidget; if (subtitleWidget != null) { if (mSubtitlesChangedListener == null) { mSubtitlesChangedListener = new RenderingWidget.OnChangedListener() { @Override public void onChanged(RenderingWidget renderingWidget) { invalidate(); } }; } setWillNotDraw(false); subtitleWidget.setOnChangedListener(mSubtitlesChangedListener); if (attachedToWindow) { subtitleWidget.onAttachedToWindow(); requestLayout(); } } else { setWillNotDraw(true); } invalidate(); } /** @hide */ @Override public Looper getSubtitleLooper() { return Looper.getMainLooper(); } }