How to obtain a picture of the current progress from the mp4 being played by exoplayer

[shaohuaboy]

exoPlayer = new ExoPlayer.Builder(this).build();
playerView.setPlayer(exoPlayer);
MediaItem mediaItem = MediaItem.fromUri("http://xxxx.mp4");
exoPlayer.setMediaItem(mediaItem);
exoPlayer.prepare();

binding.screenBooton.setOnClickListener(v -> {
            ImageOutput imageOutput = new  ImageOutput() {
                @UnstableApi @Override
                public void onImageAvailable(long presentationTimeUs, Bitmap bitmap) {
                    Log.d(TAG, presentationTimeUs+"毫秒");
                }
                @UnstableApi @Override
                public void onDisabled() {
                    Log.d(TAG, "ImageOutput onDisabled");
                }
            };
            exoPlayer.setImageOutput(imageOutput);
        });

i found imageoutput not do nothing . how to click botton to get one image from video

[shaohuaboy]

TextureView txv = (TextureView) playerView.getVideoSurfaceView();
Bitmap bitmap = txv.getBitmap();

Using textureview can achieve screenshots, butplayerView = new playerView() doesn't know how to set surface-type, and it's best to use surfaceview

[shaohuaboy]

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