Question

before I use two drawable one when the button state is pressed and an another another as default. so I’m fabricating a hole new image just for simple effect ! So now I’m asking…

is it possible to applicate (a color filter or any effect) on the button drawable when that button is pressed ?

Answer 1

I found the best way to do it !

Drawable drawableNotPressed = button.getBackground(); 
Drawable drawable = drawableNotPressed.getCurrent();

//use a filter 
drawable.setColorFilter(0xF00, Mode.MULTIPLY);
StateListDrawable listDrawable = new StateListDrawable();
listDrawable.addState(new int[] { android.R.attr.state_pressed }, drawable);
listDrawable.addState(new int[] { android.R.attr.defaultValue }, drawableNotPressed );
button.setBackgroundDrawable(listDrawable);

et Voila !