[Android] ImageView, Color Filter

Gray Scale

ColorMatrix matrix = new ColorMatrix();

matrix.setSaturation(0);

ColorMatrixColorFilter cf = new ColorMatrixColorFilter(matrix);

iv.setColorFilter(cf);

or

ColorMatrix matrix = new ColorMatrix(

new float[] { -1, 0, 0, 0, 255, 0, -1, 0, 0, 255, 0, 0, -1, 0, 255,0, 0, 0, 1, 0 });

ColorMatrixColorFilter cf = new ColorMatrixColorFilter(matrix);

iv.setColorFilter(cf);

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