Using Android's TextureView to Display Video Mirrored

http://adevelopers-blog.blogspot.sg/2014/02/using-androids-textureview-to-display.html

Android's VideoView can only play videos straight and not mirrored.
If you want your app to play a video mirrored (for instance if the video was recorded using a front camera), you will need to use a TextureView, which can be easily mirrored by specifyingandroid:scaleX=-1 in the XML file, or textureView.setScaleX(-1) in the code.

Here is a code sample for playing video using TextureView, with the option of displaying the video mirrored:

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public class SampleActivity implements SurfaceTextureListener {
    
    boolean isMirrored = true;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_sample);
        TextureView textureView = (TextureView)findViewById(R.id.myTextureView);
        textureView.setSurfaceTextureListener(this);
        textureView.setScaleX(isMirrored ? -1 : 1);
    }
 
    @Override
    public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
        MediaPlayer mediaPlayer = new MediaPlayer();
        mediaPlayer.setSurface(new Surface(surface));
        try {
            mediaPlayer.setDataSource("my_video_file.mp4");
            mediaPlayer.prepare();
            mediaPlayer.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    @Override 
    public boolean onSurfaceTextureDestroyed(SurfaceTexture surfaceTexture) {return false;}
    @Override 
    public void onSurfaceTextureSizeChanged(SurfaceTexture surfaceTexture, int width, int height) {}
    @Override 
    public void onSurfaceTextureUpdated(SurfaceTexture surfaceTexture) {}
}