StateListDrawable to switch colorfilters

Question

I want to create custom buttons to use in a TabHost. I haven been trying to just use the same image resource (png), but have the colorfilter change depending on the state. S

Answer 1

Here is my variation of @Malachiasz code, this lets you pick whatever combination of states and colors to apply to the base drawable.

public class ColorFilteredStateDrawable extends StateListDrawable {

    private final int[][] states;
    private final int[] colors;

    public ColorFilteredStateDrawable(Drawable drawable, int[][] states,  int[] colors) {
        super();
        drawable.mutate();
        this.states = states;
        this.colors = colors;
        for (int i = 0; i < states.length; i++) {
            addState(states[i], drawable);
        }
    }

    @Override
    protected boolean onStateChange(int[] states) {
        if (this.states != null) {
            for (int i = 0; i < this.states.length; i++) {
                    if (StateSet.stateSetMatches(this.states[i], states)) {
                        super.setColorFilter(this.colors[i], PorterDuff.Mode.MULTIPLY);
                        return super.onStateChange(states);
                    }
            }
            super.clearColorFilter();
        }
        return super.onStateChange(states);
    }

    @Override
    public boolean isStateful() {
        return true;
    }
}