当我使用 Android 的 MediaPlayer 类重播完成的视频时，我遇到了一些问题。
- 我查看了MediaClass Android SDK和状态图。据我所知，一旦视频完成播放，您应该能够调用 start() 并让它从头开始。
- 但是，当我重播 RSTP 文件时，这些是我得到的错误：
01-10 11:36:49.138: E/MediaPlayer(4821): 错误 (-2147483648, 0)
01-10 11:36:49.146: E/MediaPlayer(4821): 错误 (1, -1)
01-10 11 ：36：49.154：E / MediaPlayer（4821）：错误（-2147483648,0）
01-10 11：36：49.162：E / MediaPlayer（4821）：尝试在没有有效媒体播放器的情况下调用getDuration
01-10 11:36： 49.162: E/MediaPlayer(4821): 错误 (-38, 0)
01-10 11:36:49.169: E/MediaPlayer(4821): 错误 (1,-1)
01-10 11:36:49.185: E/媒体播放器（4821）：错误（-38,0）
3.最后一个问题发生在我重播网站上的 MPG4 时。再次点击播放后，视频不显示，并且搜索栏移动不同步。
下面是我的活动代码。
public class CustomMediaPlayer extends Activity implements MediaPlayerControl,
OnCompletionListener, OnErrorListener, OnInfoListener,
OnPreparedListener, OnSeekCompleteListener, OnVideoSizeChangedListener,
SurfaceHolder.Callback, OnBufferingUpdateListener {
// TODO Remove
String TAG = "VAC";
public static final String FILE_PATH = "rtsp://v4.cache2.c.youtube.com/CjYLENy73wIaLQkQ7cBxuSy88hMYDSANFEIJbXYtZ29vZ2xlSARSBXdhdGNoYJitofTlp8vjUAw=/0/0/0/video.3gp";
//
PowerManager pm;
PowerManager.WakeLock wl;
SpeechRecognizer sr;
ImageView talkImageview;
Toast toast;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
MediaPlayer mediaPlayer;
MediaController controller;
ProgressBar progressBar;
Display currentDisplay;
int videoWidth = 0;
int videoHeight = 0;
boolean readyToPlay = false;
Handler handler;
int bufferedPercentage;
boolean finishedPlaying = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.video_player);
pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
wl = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK
| PowerManager.ACQUIRE_CAUSES_WAKEUP
| PowerManager.ON_AFTER_RELEASE, new String());
wl.acquire();
preInitWidgets();
}
private void preInitWidgets() {
toast = Toast.makeText(this, "", Toast.LENGTH_LONG);
progressBar = (ProgressBar) findViewById(R.id.VideoPlayerProgressBar);
talkImageview = (ImageView) findViewById(R.id.VideoPlayerTalkImageView);
sr = SpeechRecognizer.createSpeechRecognizer(this);
sr.setRecognitionListener(new listener());
handler = new Handler();
surfaceView = (SurfaceView) findViewById(R.id.VideoPlayerSurfaceView);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mediaPlayer = new MediaPlayer();
mediaPlayerInit();
currentDisplay = getWindowManager().getDefaultDisplay();
controller = new MediaController(this);
}
void mediaPlayerInit() {
mediaPlayer.setOnCompletionListener(this);
mediaPlayer.setOnErrorListener(this);
mediaPlayer.setOnInfoListener(this);
mediaPlayer.setOnPreparedListener(this);
mediaPlayer.setOnSeekCompleteListener(this);
mediaPlayer.setOnVideoSizeChangedListener(this);
mediaPlayer.setOnBufferingUpdateListener(this);
try {
mediaPlayer.setDataSource(FILE_PATH);
// mediaPlayer.setDataSource("http://www.blk-burn.com/sandbox/sj.mp4");
} catch (Exception e) {
toast.setText("Failed To Load Video");
toast.show();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
mediaPlayer.setDisplay(holder);
try {
mediaPlayer.prepareAsync();
} catch (Exception e) {
toast.setText("Failed to Prepare");
toast.show();
}
progressBar.setVisibility(View.VISIBLE);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
@Override
public void onVideoSizeChanged(android.media.MediaPlayer mp, int width,
int height) {
// TODO Auto-generated method stub
}
@Override
public void onSeekComplete(android.media.MediaPlayer mp) {
// TODO Auto-generated method stub
}
@Override
public void onBufferingUpdate(MediaPlayer mp, int bufferedPercent) {
this.bufferedPercentage = bufferedPercent;
}
@Override
public void onPrepared(android.media.MediaPlayer mp) {
videoWidth = mp.getVideoWidth();
videoHeight = mp.getVideoHeight();
if (videoWidth > currentDisplay.getWidth()
|| videoHeight > currentDisplay.getHeight()) {
float heightRatio = (float) videoHeight
/ (float) currentDisplay.getHeight();
float widthRatio = (float) videoWidth
/ (float) currentDisplay.getWidth();
if (heightRatio > 1 || widthRatio > 1) {
if (heightRatio > widthRatio) {
videoHeight = (int) Math.ceil((float) videoHeight
/ (float) heightRatio);
videoWidth = (int) Math.ceil((float) videoWidth
/ (float) heightRatio);
} else {
videoHeight = (int) Math.ceil((float) videoHeight
/ (float) widthRatio);
videoWidth = (int) Math.ceil((float) videoWidth
/ (float) widthRatio);
}
}
}
surfaceView.setLayoutParams(new LinearLayout.LayoutParams(videoWidth,
videoHeight));
surfaceView.setLayoutParams(new LinearLayout.LayoutParams(videoWidth,
videoHeight));
controller.setMediaPlayer(this);
controller
.setAnchorView(findViewById(R.id.VideoPlayerSurfaceViewLinearLayout));
controller.setEnabled(true);
controller.show();
mp.start();
// TODO - Get Catch Phrase
talkImageview.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
// startListeningForVoice();
}
@Override
public boolean onInfo(android.media.MediaPlayer mp, int what, int extra) {
// TODO
return false;
}
@Override
public boolean onError(android.media.MediaPlayer mp, int what, int extra) {
if (what == MediaPlayer.MEDIA_ERROR_SERVER_DIED) {
toast.setText("Media Server Died");
toast.show();
} else if (what == MediaPlayer.MEDIA_ERROR_UNKNOWN) {
toast.setText("Unknown Error");
toast.show();
}
return false;
}
@Override
public void onCompletion(android.media.MediaPlayer mp) {
}
public boolean canPause() {
return true;
}
public boolean canSeekBackward() {
return true;
}
public boolean canSeekForward() {
return true;
}
public int getBufferPercentage() {
return bufferedPercentage;
}
public int getCurrentPosition() {
return mediaPlayer.getCurrentPosition();
}
public int getDuration() {
return mediaPlayer.getDuration();
}
public boolean isPlaying() {
return mediaPlayer.isPlaying();
}
public void pause() {
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
}
}
public void seekTo(int pos) {
mediaPlayer.seekTo(pos);
}
public void start() {
mediaPlayer.start();
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
if (ev.getAction() == MotionEvent.ACTION_DOWN) {
if (controller.isShowing()) {
controller.hide();
} else {
controller.show();
}
}
return false;
}
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mediaPlayer.stop();
mediaPlayer.release();
wl.release();
}
}