Black screen during video playback in Android
I'm playing a video using android media player & also showing an animation on the top of the video using another layer. (The video file is present on the sdcard.)
The animation is basically a cropped image which is being synchronized with video (TranslateAnimation).
Whenever I tap on the button to play the video, I experience a black screen momentarily with the cropped image in the center, then the video & animation both start. I want to avoid this somehow by loading the video first & then imposing the image on the top.
How can I achieve this? Or is there any better way?
Following are the relevant code snippets:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.videolayer);
this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
try{
Intent myint = this.getIntent();
photoPath = myint.getStringExtra("photo_path");
large_bitmap_path = myint.getStringExtra("large_bitmap_path");
bitmap_path = myint.getStringExtra("bitmap_path");
imv1 = (ImageView)findViewById(R.id.imv1);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
bitmap = BitmapFactory.decodeFile(photoPath, options);
imv1.setImageBitmap(bitmap);
getWindowManager().getDefaultDisplay().getMetrics(dm);
videoView = (VideoView) findViewById(R.id.VideoView);
File f=new File(Environment.getExternalStorageDirectory(), "videos/"+Videoid[GalleryVideo.galleryVideoCounter]+".m4v");
Uri video = Uri.parse(f.getAbsolutePath());
videoView.setVideoURI(video);
videoView.setOnPreparedListener(this);
videoView.setOnCompletionListener(video_listener);
videoView.start();
lower = (View)findViewById(R.id.lower);
middle = (View)findViewById(R.id.middle);
upper = (View)findViewById(R.id开发者_运维百科.upper);
upper.setVisibility(4);
.......
RelativeLayout ll = (RelativeLayout) findViewById(R.id.LinearLayout01);
ll.setOnTouchListener(video_tap);
startTime = System.currentTimeMillis();
} catch(Exception e){
e.printStackTrace();
}
}
.................
@Override
public void onPrepared(MediaPlayer mp) {
// TODO Auto-generated method stub
videoHeight = videoView.getMeasuredHeight();
videoWidth = videoView.getMeasuredWidth();
displayWidth = getApplicationContext().getResources().getDisplayMetrics().widthPixels;
displayHeight = getApplicationContext().getResources().getDisplayMetrics().heightPixels;
//video is ready for play, now start animation
anim_start = 1;
launchAnimation();
}
private Runnable resumeAnim =new Runnable() {
public void run() {
launchAnimation();
}
};
You should use thread to play video and show image using handler or u can use AsyncTask to solve the black screen problem. I faced the same problem and got rid off using thread and handler.
精彩评论