问题
I am new to play a video in video player using surface view now i want to save instance state of media player when orientation change when view reloaded or recreated then old media player state start at old position not to load on original means at zero position i set in manifest like screen orientation but that time oncreate not called i want to call also oncreate method when screen orientation change means to say i want to reload a new activity when orientation change and also save media player state please acknowledge i am stuck at that time i don't know what mistake.
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;
}
and other class which extend from frameLayout
and some crashes when app going to run
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
回答1:
You need to reset the orientation to SCREEN_ORIENTATION_SENSOR after a few seconds so the sensor will start to work again..
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
new Handler().postDelayed(new Runnable() {
@Override public void run() { setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR); } }, 2000);
回答2:
To save and resume video positions when rotating you need to utilise onSaveInstanceState and onRestoreInstanceState. You can save the video position from a VideoView with this code.
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
VideoView videoView = (VideoView) findViewById(R.id.videoView);
videoPosition = videoView.getCurrentPosition();
if (videoView.canPause()) {
videoView.pause();
}
outState.putInt(VIDEO_POSITION_KEY, videoPosition);
Log.d(LOG_TAG, "onSaveInstanceState() Current Position Saved is: " + videoPosition);
}
...and retrieve it again with this code.
@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
videoPosition = savedInstanceState.getInt(VIDEO_POSITION_KEY, 0);
VideoView videoView = (VideoView) findViewById(R.id.videoView);
Log.d(LOG_TAG, "onRestoreInstanceState() - Seeking to position:" + Integer.toString(videoPosition));
videoView.seekTo(videoPosition); // this call should keep the video at the saved position
}
来源：https://stackoverflow.com/questions/33073394/media-player-does-not-load-when-activity-is-recreated-on-orientation-change