我是新手，想使用SurfaceView播放视频，现在我想在屏幕方向改变时保存媒体播放器的实例状态，当视图重新加载或重新创建时，旧的媒体播放器状态将从旧位置开始，而不是从原始位置开始加载（即从零位置开始）。我在清单文件中设置了屏幕方向，但此时onCreate方法未被调用。我希望在屏幕方向改变时也调用onCreate方法，也就是说，我希望在屏幕方向改变时重新加载一个新的活动，并保存媒体播放器的状态。请确认，我卡在那个时候，我不知道哪里出错了。
SurfaceView videoSurface;
MediaPlayer player;
VideoControllerView controller;
private boolean mFullScreen = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_video_player);
videoSurface = (SurfaceView) findViewById(R.id.videoSurface);
SurfaceHolder videoHolder = videoSurface.getHolder();
videoHolder.addCallback(this);
player = new MediaPlayer();
controller = new VideoControllerView(this);
try {
player.setAudioStreamType(AudioManager.STREAM_MUSIC);
player.setDataSource(this, Uri.parse("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"));
player.setOnPreparedListener(this);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
controller.show();
return false;
}
// Implement SurfaceHolder.Callback
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
player.setDisplay(holder);
player.prepareAsync();
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
// End SurfaceHolder.Callback
// Implement MediaPlayer.OnPreparedListener
@Override
public void onPrepared(MediaPlayer mp) {
controller.setMediaPlayer(this);
controller.setAnchorView((FrameLayout) findViewById(R.id.videoSurfaceContainer));
player.start();
}
// End MediaPlayer.OnPreparedListener
// Implement VideoMediaController.MediaPlayerControl
@Override
public boolean canPause() {
return true;
}
@Override
public boolean canSeekBackward() {
return true;
}
@Override
public boolean canSeekForward() {
return true;
}
@Override
public int getBufferPercentage() {
return 0;
}
@Override
public int getCurrentPosition() {
return player.getCurrentPosition();
}
@Override
public int getDuration() {
return player.getDuration();
}
@Override
public boolean isPlaying() {
return player.isPlaying();
}
@Override
public void pause() {
player.pause();
}
@Override
public void seekTo(int i) {
player.seekTo(i);
}
@Override
public void start() {
player.start();
}
@Override
public boolean isFullScreen() {
if(mFullScreen){
Log.w("FullScreen", "--set icon full screen--");
Log.w("curr",player.getCurrentPosition()+"");
/* ImageButton mFullscreenButton=(ImageButton)controller.findViewById(R.id.fullscreen);
mFullscreenButton.setImageResource(R.drawable.ic_media_fullscreen_stretch);
*/ return false;
}else{
Log.w("FullScreen", "--set icon small full screen--");
return true;
}
}
@Override
public void toggleFullScreen() {
Log.w("FullScreen", "-----------------click toggleFullScreen-----------");
setFullScreen(isFullScreen());
}
// End VideoMediaController.MediaPlayerControl
public void setFullScreen(boolean fullScreen){
fullScreen = false;
if (mFullScreen)
{
Log.w("FullScreen", "-----------Set full screen SCREEN_ORIENTATION_LANDSCAPE------------");
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
int height = displaymetrics.heightPixels;
int width = displaymetrics.widthPixels;
android.widget.FrameLayout.LayoutParams params = (android.widget.FrameLayout.LayoutParams) videoSurface.getLayoutParams();
params.width = width;
params.height=height;
params.setMargins(0, 0, 0, 0);
//set icon is full screen
mFullScreen = fullScreen;
}
else{
Log.w("FullScreen", "-----------Set small screen SCREEN_ORIENTATION_PORTRAIT------------");
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
DisplayMetrics displaymetrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
final FrameLayout mFrame = (FrameLayout) findViewById(R.id.videoSurfaceContainer);
// int height = displaymetrics.heightPixels;
int height =225;//get height Frame Container video//mFrame.getHeight()
int width =displaymetrics.widthPixels;
android.widget.FrameLayout.LayoutParams params = (android.widget.FrameLayout.LayoutParams) videoSurface.getLayoutParams();
params.width = width;
params.height= height;
params.setMargins(0, 0, 0, 0);
//set icon is small screen
mFullScreen = !fullScreen;
}
}
@Override
protected void onSaveInstanceState(Bundle estadoguardado){
super.onSaveInstanceState(estadoguardado);
if(player!=null){
int pos=player.getCurrentPosition();
estadoguardado.putInt("posicion", pos);
}
}
@Override
protected void onRestoreInstanceState(Bundle estadoguardado)
{
super.onRestoreInstanceState(estadoguardado);
if(estadoguardado!=null && player!=null){
int pos=estadoguardado.getInt("posicion");
Log.w("position",pos+"");
player.seekTo(pos);
}
}
@Override
public void onResume()
{
super.onResume();
try {
//reinicia
Toast.makeText(this, "onResume2", Toast.LENGTH_SHORT).show();
if (player == null)
player.setDataSource(this, Uri.parse("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4"));
player.seekTo(0);
player.setLooping(true);
player.start();
}
catch(Exception e)
{
e.printStackTrace();
}
}
@Override
public void onPause()
{
super.onPause();
Toast.makeText(this, "onPause2", Toast.LENGTH_SHORT).show();
//LIBERA A MEDIA PLAYER
if (player != null)
{
player.release();
player = null;
}
还有其他继承自FrameLayout的类
在应用程序运行时会出现一些崩溃问题
java.lang.IllegalStateException
at android.media.MediaPlayer.prepareAsync(Native Method)
at whizpool.videoplayerexample.VideoPlayerActivity.surfaceCreated(VideoPlayerActivity.java:70)
at android.view.SurfaceView.updateWindow(SurfaceView.java:554)
at android.view.SurfaceView.access$000(SurfaceView.java:81)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:169)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:693)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1762)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4666)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511
10-12 10:00:48.726 2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ Attempt to perform seekTo in wrong state: mPlayer=0x18332b8, mCurrentState=2
10-12 10:00:48.726 2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ error (-38, 0)
10-12 10:00:48.727 2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ start called in state 0
10-12 10:00:48.727 2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ error (-38, 0)
10-12 10:00:48.738 2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ Error (-38,0)
10-12 10:00:48.738 2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ Error (-38,0)
10-12 10:00:48.885 2268-2268/whizpool.videoplayerexample E/MediaPlayer﹕ prepareAsync called in state 0
onResumeд»Јз Ғзҡ„жіЁйҮҠпјҒ - AndiGeekysuper.onResume(); try { //重新开始 Toast.makeText(this, "onResume2", Toast.LENGTH_SHORT).show(); if (player == null) player.setDataSource(this, Uri.parse("http://clips.vorwaerts-gmbh.de/big_buck_bunny.mp4")); player.seekTo(0); player.setLooping(true); player.start(); } catch(Exception e) { e.printStackTrace(); }} 当我添加这段代码后，我的应用程序崩溃了，它会给出下一个评论中的错误。 - humayoon siddique