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

I have got a work around for this issue i made the image brighter and then shown it in an imageview. The code i used is given below:

foto.setColorFilter(brightIt(100));//foto is my ImageView
//and below is the brightIt func
public static ColorMatrixColorFilter brightIt(int fb) {
ColorMatrix cmB = new ColorMatrix();
cmB.set(new float[] { 
    1, 0, 0, 0, fb,
    0, 1, 0, 0, fb,
    0, 0, 1, 0, fb,
    0, 0, 0, 1, 0   });

ColorMatrix colorMatrix = new ColorMatrix();
colorMatrix.set(cmB);
//Canvas c = new Canvas(b2);
//Paint paint = new Paint();
ColorMatrixColorFilter f = new ColorMatrixColorFilter(colorMatrix);
//paint.setColorFilter(f);   
return f;
}