Enhancing ImageView brightness programmatically

Question

I have an android app in which I am increasing brightness of image with the code below. But this is very slow so does anyone knows a fast way to enhance image brightness of

Answer 1

The above answers didnt work for me as I had an imageview with image set using bitmap. So this is what it worked:

    private ColorMatrixColorFilter brightness(float value) {
        ColorMatrix cmB = new ColorMatrix();
        cmB.set(new float[]{
                1, 0, 0, 0, value,
                0, 1, 0, 0, value,
                0, 0, 1, 0, value,
                0, 0, 0, 1, 0});
        return new ColorMatrixColorFilter(cmB);
    }

Have a seek bar with controls the brightness.Its range is from -255 to 255.

 sbBrightness.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                if(fromUser){
                    photoFilterView.getSource().setColorFilter(brightness(progress));

               /*     Filter brightness=new Filter();
                    brightness.addSubFilter(new BrightnessSubFilter(progress));

                    Bitmap ouputImage = brightness.processFilter(bm);
                    photoFilterView.getSource().setImageBitmap(ouputImage);*/
                }
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        sbBrightness.setVisibility(View.GONE);
                    }
                },1000);

            }
        });

Hope it helps some.