我正在使用Android媒体播放器播放视频还使用另一个图层在视频顶部显示动画。 (视频文件出现在SD卡上。)
动画基本上是一个与视频同步的裁剪图像( TranslateAnimation )。
每当我点击按钮播放视频时,我会立即在中心处看到裁剪后的图像,然后是视频&动画都开始了。我希望以某种方式通过首先加载视频来避免这种情况。然后将图像强加在顶部。
我怎样才能做到这一点?还是有更好的方法吗?
以下是相关的代码段:
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();
}
};
答案 0 :(得分:0)
您应该使用线程来播放视频并使用处理程序显示图像,或者您可以使用AsyncTask来解决黑屏问题。我遇到了同样的问题,并使用线程和处理程序摆脱了。