Develop Reference

VideoView turn into black screen

I am developing multi player video app, so in that i created 9 views 3*3.
when i initialize all (3*3) videoview then working properly for few seconds and after some time video is goes to black screen, not show single video, i am not understand this issue is device oriented or android not supports more than 1 video in activity, anyone know how to resolve this issue, otherwise if video is turn into black then how to identify video is turned into black screen, if we found this then i will refresh view and again start video, i don't know it is correct way or not.
please anyone know about how to resolve this issue then please share information !
i use below code for show multiple video view in one activity
videoPlayer.setVideoPath("path");
videoPlayer.start();
videoPlayer.requestFocus();
videoPlayer.setKeepScreenOn(true);
set prepare listener
videoPlayer.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
#Override
public void onPrepared(MediaPlayer mp) {
}
set completion listener
videoPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
#Override
public void onCompletion(MediaPlayer mp) {
//play next
}
});
handle error listener
videoPlayer.setOnErrorListener(new MediaPlayer.OnErrorListener() {
#Override
public boolean onError(MediaPlayer mediaPlayer, int i, int i1) {
// play next
return true;
}
});
when video play next before that i set some propertied to mediaplyer object
mediaPlayer.setDisplay(null);
mediaPlayer.reset();
mediaPlayer.setDisplay(videoPlayer.getHolder());
i share basic code of my project, please tell me if anything is missing from me or android is not supported multiple videos in same activity.

How to display a video with a transparent/masked background?

The wording on this is most likely wrong, but I want to play this video without having the background black. If you look at this webpage you will see that the video is on a white background which leads me to believe that it is cropped or masked. Which view would I use to do this? I have tried both TextureView and VideoView but both have a black background by default.

I solve it with this:
#Override
public void onPrepared(MediaPlayer mp) {
mp.setOnInfoListener(new MediaPlayer.OnInfoListener() {
#Override
public boolean onInfo(MediaPlayer mp, int what, int extra) {
Log.d(TAG, "onInfo, what = " + what);
if (what == MediaPlayer.MEDIA_INFO_VIDEO_RENDERING_START) {
// video started; hide the placeholder.
placeholder.setVisibility(View.GONE);
return true;
}
return false;
}
});
I think onPrepared just means the video is ready to play, but not means video started playing. If hide placeholder in onPrepared, the screen still show a black screen.
On my Note4 and Nexus, this solution works well.

retain videoview in fragment when rotating

I have a activity who hold 2 fragments (one SlidingMenu and other a VideoPlayer with control and other views).
How Can I retain the video playing status when I'm rotating the device? the video is a HLS Stream, so, I don't need to start again the buffering when rotate.
I start playing with the savedInstanceState, but i can't get it work

If you are using the same resources on on different screen orientations, you can prevent fragment from recreating.
If you need to recreate fragment, you can store playback progress, and after recreation scroll video to stored position
#Override
protected void onPause() {
...
if(playbackWasStarted) {
video.pause();
videoProgress = video.getCurrentPosition();
}
...
}
#Override
protected void onResume() {
...
if(playbackWasStarted && videoProgress!=0) {
video.seekTo(videoProgress);
video.start();
}
...
}
EDIT Oh, I didn't noticed that this question is veeeery old...

How to get current view of android screen

I am developing an Android application which should record a video. There are certain classes that I cannot change due to restrictions of the project, like Preview and VideoRec classes.
Application has one main screen activity and there is a toggle button. Whenever toggle button is checked, video recording should start and vice versa for the unchecked state.
However, VideoRec class' constructor takes a View type parameter for input (VideoRec(View x)). Main activity's screen has a surfaceview and several buttons. What I am trying to do is to just initiate video recording on the same screen, just like the default mediarecorder application of any phone.
My question is; I keep on failing to obtain the View of the screen. I can't use preview or surfaceView types, I get errors saying either classCast Exceptions or invalid preview/surface preview.
Long story short, how can i get the activity's screen as a type of View?

you can provide a public method in your Main Activity which returns the view you need.
Obviously you have to save a reference of that view in your onCreate method activity:
View myView;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.the_layout_id);
myView = (View)findViewByID(R.id.your_id_view);
}
public View getTheView(){
return myView;
}

What I understand is you have 1 surfaceview where reproducing what you are recording.
So you must attach your PreviewCallback in the surfaceChanged(...) SurfaceHolder.Callback! After doing this, you'll continue to get preview frame data after a MediaRecorder is running!
For example:
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
mCamera.setPreviewCallback(new PreviewCallback() {
public void onPreviewFrame(byte[] _data, Camera _camera) {
Log.d("onPreviewFrame-surfaceChanged",String.format("Got %d bytes of camera data", _data.length));
}
});
}
Hope it helps!Cheers

VideoView doesn't start when invisible

I have an AsyncTask, where I hide a video view, start the video playback, and show the video view when the video is playing.
But the video would just not start when the video view is set to invisible, the async task keeps hanging in onBackground. If I comment out this line, the video starts playing.
Why does the video view require a visible surface?
public void walk(final View v) {
new AsyncTask() {
#Override
protected void onPreExecute() {
super.onPreExecute();
mVideoView.setVisibility(View.INVISIBLE); // this line causes video not to start
mVideoView.start();
}
#Override
protected Object doInBackground(Object... objects) {
while (!mVideoView.isPlaying()) {}
return null;
}
#Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
mVideoView.setVisibility(View.VISIBLE);
}
}.execute();
A bit of background why I'm doing this: I try to avoid the well-known issue of the black flash that you usually have when starting a video:
https://stackoverflow.com/search?q=%5Bandroid%5D+videoview+black
https://stackoverflow.com/search?q=%5Bandroid%5D+video+%5Bmediaplayer%5D+black

The VideoView is really a specialised SurfaceView. A SurfaceView works by creating another window behind the normal window (containing all of the views), and then having an area of transparency so that the new window (with its own drawing surface) can be seen behind it.
If a SurfaceView is no longer visible, its surface will be destroyed i.e. SurfaceHolder.Callback.surfaceDestroyed is called. The VideoView will not try to play its video if there is not a valid surface, hence your AsyncTask will be able to never leave doInBackground.
The Surface will be created for you while the SurfaceView's window is visible; you should implement surfaceCreated(SurfaceHolder) and surfaceDestroyed(SurfaceHolder) to discover when the Surface is created and destroyed as the window is shown and hidden.