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我正在播放使用android媒體播放器的視頻&也使用另一個圖層在視頻頂部顯示動畫。 (視頻文件存在於SD卡上。)Android中的視頻播放過程中的黑屏
動畫基本上是與視頻同步的裁剪圖像(TranslateAnimation)。
每當我點擊按鈕播放視頻時,我都會在中心點出現短暫的黑屏,然後視頻&動畫都開始了。我想通過首先加載視頻&然後將圖像置於頂部來避免這種情況。
我該如何做到這一點?或者有沒有更好的方法?
以下是相關的代碼片段:
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.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();
}
};