我正在使用 MediaPlayer 和自定义 TextureView 制作一个 android 视频播放器。
但是我的代码在mContext.sendBroadcast(i);openVideo() 的函数中出现了错误；
private void openVideo()
{
Log.e(TAG, "openVideo");
if (mUri == null || mSurfaceTexture == null)
{
// not ready for playback just yet, will try again later
return;
}
// Tell the music playback service to pause
// TODO: these constants need to be published somewhere in the
// framework.
Intent i = new Intent("com.android.music.musicservicecommand");
i.putExtra("command", "pause");
mContext.sendBroadcast(i);
Log.e(TAG, "openVideo passed" );
// we shouldn't clear the target state, because somebody might have
// called start() previously
release(false);
try
{
mMediaPlayer = new MediaPlayer(mContext);
mMediaPlayer.setOnPreparedListener(mPreparedListener);
mMediaPlayer.setOnVideoSizeChangedListener(mSizeChangedListener);
mDuration = -1;
mMediaPlayer.setOnCompletionListener(mCompletionListener);
mMediaPlayer.setOnErrorListener(mErrorListener);
mMediaPlayer.setOnInfoListener(mInfoListener);
mMediaPlayer.setOnBufferingUpdateListener(mBufferingUpdateListener);
mCurrentBufferPercentage = 0;
mMediaPlayer.setDataSource(mContext, mUri);
mMediaPlayer.setSurface(new Surface(mSurfaceTexture));
// mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mMediaPlayer.setScreenOnWhilePlaying(true);
mMediaPlayer.prepareAsync();
// 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;
}
}
下面是VideoView的内容
public class VideoView extends TextureView implements VideoController.VideoPlayerControl {
private String TAG = "VideoView2";
private final VideoSizeCalculator videoSizeCalculator;
private Uri mUri;
private int mDuration;
private FullScreenControl mScreenControl;
// all possible internal states
private static final int STATE_ERROR = -1;
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 static final int STATE_STOP = 6;
// 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.
private int mCurrentState = STATE_IDLE;
private int mTargetState = STATE_IDLE;
// All the stuff we need for playing and showing a video
private SurfaceTexture mSurfaceTexture = null;
private MediaPlayer mMediaPlayer = null;
private int mVideoWidth;
private int mVideoHeight;
private int mSurfaceWidth;
private int mSurfaceHeight;
private VideoController mVideoController;
private OnCompletionListener mOnCompletionListener;
private OnPreparedListener mOnPreparedListener;
private int mCurrentBufferPercentage;
private OnErrorListener mOnErrorListener;
private OnInfoListener mOnInfoListener;
private int mSeekWhenPrepared; // recording the seek position while
// preparing
private Context mContext;
public VideoView2(final Context context, final AttributeSet attrs) {
this(context, attrs, 0);
}
public VideoView2(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
videoSizeCalculator = new VideoSizeCalculator();
initVideoView();
}
@Override
protected void onMeasure(final int widthMeasureSpec, final int heightMeasureSpec) {
VideoSizeCalculator.Dimens dimens = videoSizeCalculator.measure(widthMeasureSpec, heightMeasureSpec);
setMeasuredDimension(dimens.getWidth(), dimens.getHeight());
}
@Override
public void onInitializeAccessibilityEvent(final AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(event);
event.setClassName(VideoView2.class.getName());
}
@Override
public void onInitializeAccessibilityNodeInfo(final AccessibilityNodeInfo info) {
super.onInitializeAccessibilityNodeInfo(info);
info.setClassName(VideoView2.class.getName());
}
public int resolveAdjustedSize(final int desiredSize, final int measureSpec) {
return getDefaultSize(desiredSize, measureSpec);
}
@SuppressWarnings("deprecation")
private void initVideoView()
{
mVideoWidth = 0;
mVideoHeight = 0;
videoSizeCalculator.setVideoSize(0, 0);
setSurfaceTextureListener(mSTListener);
setFocusable(true);
setFocusableInTouchMode(true);
requestFocus();
mCurrentState = STATE_IDLE;
mTargetState = STATE_IDLE;
}
public void setFullScreenControll(FullScreenControl screenControl){
mScreenControl = screenControl;
}
public void setVideoPath(String path)
{
Log.e(TAG, "setVideoPath : " + path);
setVideoURI(Uri.parse(path));
}
public void setVideoURI(Uri uri)
{
Log.e(TAG, "setVideoURI : " );
if (mVideoController != null)
mVideoController.toggleLoading(true);
mUri = uri;
mSeekWhenPrepared = 0;
openVideo();
requestLayout();
invalidate();
//EasyTracker.getTracker().trackEvent(TAG, "Play video", uri.toString(), -1l);
}
public void stopPlayback()
{
if (mMediaPlayer != null)
{
if (mCurrentState != STATE_PREPARING)
{
mMediaPlayer.stop();
mMediaPlayer.release();
mMediaPlayer = null;
mCurrentState = STATE_IDLE;
mTargetState = STATE_IDLE;
}
else
mTargetState = STATE_STOP;
}
}
private void openVideo()
{
Log.e(TAG, "openVideo");
if (mUri == null || mSurfaceTexture == null)
{
// not ready for playback just yet, will try again later
return;
}
// Tell the music playback service to pause
// TODO: these constants need to be published somewhere in the
// framework.
Intent i = new Intent("com.android.music.musicservicecommand");
i.putExtra("command", "pause");
mContext.sendBroadcast(i);
Log.e(TAG, "openVideo passed" );
// we shouldn't clear the target state, because somebody might have
// called start() previously
release(false);
try
{
mMediaPlayer = new MediaPlayer(mContext);
mMediaPlayer.setOnPreparedListener(mPreparedListener);
mMediaPlayer.setOnVideoSizeChangedListener(mSizeChangedListener);
mDuration = -1;
mMediaPlayer.setOnCompletionListener(mCompletionListener);
mMediaPlayer.setOnErrorListener(mErrorListener);
mMediaPlayer.setOnInfoListener(mInfoListener);
mMediaPlayer.setOnBufferingUpdateListener(mBufferingUpdateListener);
mCurrentBufferPercentage = 0;
mMediaPlayer.setDataSource(mContext, mUri);
mMediaPlayer.setSurface(new Surface(mSurfaceTexture));
// mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mMediaPlayer.setScreenOnWhilePlaying(true);
mMediaPlayer.prepareAsync();
// 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;
}
}
public void setVideoController(VideoController controller)
{
if (mVideoController != null)
{
mVideoController.hide();
}
mVideoController = controller;
attachMediaController();
}
private void attachMediaController()
{
if (mMediaPlayer != null && mVideoController != null)
{
mVideoController.setMediaPlayer(this);
mVideoController.setEnabled(isInPlaybackState());
}
}
MediaPlayer.OnVideoSizeChangedListener mSizeChangedListener = new MediaPlayer.OnVideoSizeChangedListener()
{
@Override
public void onVideoSizeChanged(MediaPlayer mp, int width, int height)
{
Log.e(TAG, "mSizeChangedListener");
mVideoWidth = mp.getVideoWidth();
mVideoHeight = mp.getVideoHeight();
videoSizeCalculator.setVideoSize(mVideoWidth, mVideoHeight);
if (videoSizeCalculator.hasASizeYet()) {
requestLayout();
}
}
};
MediaPlayer.OnPreparedListener mPreparedListener = new MediaPlayer.OnPreparedListener()
{
public void onPrepared(MediaPlayer mp)
{
Log.e(TAG, "mPreparedListener");
if (mTargetState == STATE_STOP)
{
release(true);
return;
}
mCurrentState = STATE_PREPARED;
if (mOnPreparedListener != null)
{
mOnPreparedListener.onPrepared(mMediaPlayer);
}
if (mVideoController != null)
{
mVideoController.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);
videoSizeCalculator.setVideoSize(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();
}
else
{
if (mVideoController != null)
{
// Show the media controls when we're paused into a
// video and make 'em stick.
mVideoController.toggleLoading(false);
mVideoController.show();
}
}
}
}
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();
}
else
{
if (mVideoController != null)
{
mVideoController.toggleLoading(false);
mVideoController.show();
}
}
}
}
};
private MediaPlayer.OnInfoListener mInfoListener = new MediaPlayer.OnInfoListener()
{
@Override
public boolean onInfo(MediaPlayer mp, int what, int extra)
{
Log.e(TAG, "mInfoListener");
switch (what)
{
case MediaPlayer.MEDIA_INFO_BUFFERING_START:
mVideoController.toggleLoading(true);
break;
case MediaPlayer.MEDIA_INFO_BUFFERING_END:
mVideoController.toggleLoading(false);
break;
default:
break;
}
if (mOnInfoListener != null)
mOnInfoListener.onInfo(mp, what, extra);
return true;
}
};
private MediaPlayer.OnCompletionListener mCompletionListener = new MediaPlayer.OnCompletionListener()
{
public void onCompletion(MediaPlayer mp)
{
Log.e(TAG, "mCompletionListener");
mCurrentState = STATE_PLAYBACK_COMPLETED;
mTargetState = STATE_PLAYBACK_COMPLETED;
if (mVideoController != null)
{
if(mVideoController.isShowing())
mVideoController.hide();
mVideoController.show();
}
if (mOnCompletionListener != null)
{
mOnCompletionListener.onCompletion(mMediaPlayer);
}
}
};
private MediaPlayer.OnErrorListener mErrorListener = new MediaPlayer.OnErrorListener()
{
public boolean onError(MediaPlayer mp, int framework_err, int impl_err)
{
Log.e(TAG, "mErrorListener");
Log.d(TAG, "Error: " + framework_err + "," + impl_err);
mCurrentState = STATE_ERROR;
mTargetState = STATE_ERROR;
if (mVideoController != null)
{
mVideoController.show();
}
/* If an error handler has been supplied, use it and finish. */
if (mOnErrorListener != null)
{
}
return true;
}
};
private MediaPlayer.OnBufferingUpdateListener mBufferingUpdateListener = new MediaPlayer.OnBufferingUpdateListener()
{
public void onBufferingUpdate(MediaPlayer mp, int percent)
{
Log.e(TAG, "mBufferingUpdateListener");
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;
}
private SurfaceTextureListener mSTListener = new SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(final SurfaceTexture surface, final int width, final int height) {
Log.e(TAG, "onSurfaceTextureAvailable");
mSurfaceTexture = surface;
openVideo();
}
@Override
public void onSurfaceTextureSizeChanged(final SurfaceTexture surface, final int width, final int height) {
Log.e(TAG, "surfaceChanged " + width +" " +height);
mSurfaceWidth = width;
mSurfaceHeight = height;
boolean isValidState = (mTargetState == STATE_PLAYING);
boolean hasValidSize = (mVideoWidth ==width && mVideoHeight == height);
if (mMediaPlayer != null && isValidState && hasValidSize)
{
if (mSeekWhenPrepared != 0)
{
seekTo(mSeekWhenPrepared);
}
start();
}
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
Log.e(TAG, "onSurfaceTextureDestroyed");
mSurfaceTexture = null;
if (mVideoController != null)
mVideoController.hide();
release(true);
return true;
}
@Override
public void onSurfaceTextureUpdated(final SurfaceTexture surface) {
Log.e(TAG, "onSurfaceTextureUpdated");
mSurfaceTexture = surface;
}
};
/*
* release the media player in any state
*/
private void release(boolean cleartargetstate)
{
if (mMediaPlayer != null)
{
mMediaPlayer.reset();
mMediaPlayer.release();
mMediaPlayer = null;
mCurrentState = STATE_IDLE;
if (cleartargetstate)
{
mTargetState = STATE_IDLE;
}
}
}
@Override
public boolean onTouchEvent(MotionEvent ev)
{
//Log.e(TAG, "onTouchEvent");
switch (ev.getAction())
{
case MotionEvent.ACTION_DOWN:
if ((isInPlaybackState() || mCurrentState == STATE_ERROR) && mVideoController != null)
{
toggleMediaControlsVisiblity();
}
// if(mCurrentState == STATE_ERROR)
// return true;
return false;
// case MotionEvent.ACTION_UP:
// if(mCurrentState == STATE_ERROR)
// {
// restart();
// return true;
// }
// return false;
default:
return false;
}
}
@Override
public boolean onTrackballEvent(MotionEvent ev)
{
if (isInPlaybackState() && mVideoController != null)
{
Log.e(TAG, "onTrackballEvent");
toggleMediaControlsVisiblity();
}
return false;
}
@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 && mVideoController != null)
{
if (keyCode == KeyEvent.KEYCODE_HEADSETHOOK || keyCode == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE)
{
if (mMediaPlayer.isPlaying())
{
pause();
mVideoController.show();
}
else
{
start();
mVideoController.hide();
}
return true;
}
else if (keyCode == KeyEvent.KEYCODE_MEDIA_PLAY)
{
if (!mMediaPlayer.isPlaying())
{
start();
mVideoController.hide();
}
return true;
}
else if (keyCode == KeyEvent.KEYCODE_MEDIA_STOP || keyCode == KeyEvent.KEYCODE_MEDIA_PAUSE)
{
if (mMediaPlayer.isPlaying())
{
pause();
mVideoController.show();
}
return true;
}
else
{
toggleMediaControlsVisiblity();
}
}
return super.onKeyDown(keyCode, event);
}
private void toggleMediaControlsVisiblity()
{
mVideoController.toggleVisibility();
}
public void start()
{
if (mCurrentState == STATE_ERROR)
{
restart();
return;
}
if (isInPlaybackState())
{
mMediaPlayer.start();
mCurrentState = STATE_PLAYING;
mVideoController.toggleLoading(false);
}
mTargetState = STATE_PLAYING;
}
public void pause()
{
if (isInPlaybackState())
{
if (mMediaPlayer.isPlaying())
{
mMediaPlayer.pause();
mCurrentState = STATE_PAUSED;
}
}
mTargetState = STATE_PAUSED;
}
public void restart()
{
mVideoController.toggleLoading(true);
openVideo();
requestLayout();
invalidate();
start();
}
public void suspend()
{
release(false);
}
public void resume()
{
openVideo();
}
// cache duration as mDuration for faster access
public int getDuration()
{
if (isInPlaybackState())
{
if (mDuration > 0)
{
return mDuration;
}
mDuration = (int) mMediaPlayer.getDuration();
return mDuration;
}
mDuration = -1;
return mDuration;
}
public int getCurrentPosition()
{
if (isInPlaybackState())
{
return (int) mMediaPlayer.getCurrentPosition();
}
return 0;
}
public void seekTo(int msec)
{
if (isInPlaybackState())
{
mMediaPlayer.seekTo(msec);
mSeekWhenPrepared = 0;
}
else
{
mSeekWhenPrepared = msec;
}
}
public boolean isPlaying()
{
return isInPlaybackState() && mMediaPlayer.isPlaying();
}
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 isFullScreen() {
// TODO Auto-generated method stub
return mScreenControl.checkFullScreen();
}
@Override
public void toggleFullScreen() {
// TODO Auto-generated method stubsetRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
mScreenControl.toggleFullScreen();
}
public interface FullScreenControl
{
public boolean checkFullScreen();
public void toggleFullScreen();
public int getHeight();
public int getWidth();
}
}
请给我一些建议。提前致谢！