我尝试使用SurfaceView和TextureView播放相同的视频,并注意到使用TextureView渲染的图像比使用SurfaceView更具别名(更不“平滑”).
这是什么原因？有没有办法配置TextureView的渲染看起来更好？
TextureView的用法如下：
TextureView textureView = new TextureView(this);
textureView.setSurfaceTextureListener(new SurfaceTextureListener() {
@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture,int width,int height) {
Log.i("test","onSurfaceTextureAvailable()");
MediaPlayer player = MediaPlayer.create(TestActivity.this,Uri.parse(VIDEO_URL));
Surface surface = new Surface(surfaceTexture);
player.setSurface(surface);
player.start();
}
@Override
public void onSurfaceTextureUpdated(SurfaceTexture surface) {
Log.i("test","onSurfaceTextureUpdated()");
}
@Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface,int height) {
Log.i("test","onSurfaceTextureSizeChanged()");
}
@Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
Log.i("test","onSurfaceTextureDestroyed()");
return false;
}
});
setContentView(textureView);
而对于SurfaceView：
SurfaceView surfaceView = new SurfaceView(this);
surfaceView.getHolder().addCallback(new Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
Log.i("test","surfaceCreated()");
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.i("test","surfaceDestroyed()");
}
@Override
public void surfaceChanged(SurfaceHolder holder,int format,"surfaceChanged()");
MediaPlayer player = MediaPlayer.create(TestActivity.this,Uri.parse(VIDEO_URL));
player.setSurface(holder.getSurface());
player.start();
}
});
setContentView(surfaceView);
解决方法
好吧,似乎在TextureView上应用缩放(除1之外)就可以实现我正在寻找的“平滑”效果.
textureView.setScaleX(1.00001f);
这听起来像是一个奇怪的黑客……但它确实有效.挖掘改变渲染方面的缩放比例会很有趣……