How to set Android ImageButton backgroundimage for different states in Java Code

Question

I have defined a ImageButton as being drawn by a selector (which uses several images for different states). I need to change the way the buttons look during runtime.

I know I can use "setBackgroundResource" - but I have made the actual background resource a selector. I need to set the images for the specific states I have used in the selector.

So do I need to somehow obtain the selector, then set the images there? If I just call "setBackgroundResource" I assume this will negate the whole selector.

How do I go about doing this?

possible duplicate of [replace selector images programmatically](http://stackoverflow.com/questions/4697528/replace-selector-images-programmatically) — Brad, Oct 21 '11 at 20:43

score 1 · Accepted Answer · answered Oct 24 '11 at 15:21

I wound up simply replacing the selector when the button changes states as follows. Was fairly simple in the end. Inside the button's class:

    StateListDrawable states = new StateListDrawable();
    states.addState(new int[] {-android.R.attr.state_pressed},getResources().getDrawable(R.drawable.button_normal));
    states.addState(new int[] {android.R.attr.state_pressed},getResources().getDrawable(R.drawable.button_pressed));

    this.setImageDrawable(states);
    this.invalidate();

score 0 · Answer 2 · answered Oct 21 '11 at 17:26

0

You can get the StateListDrawable you set, probably casting the Drawable returned by getDrawable() or getBackground() and then invoke selectDrawable().

answered Oct 21 '11 at 17:26

Diego Torres Milano

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"selectDrawable" is undocumented. Assuming I get the StateListDrawable - I can't figure out how to set the images from there. – Brad Oct 21 '11 at 19:44
Use the numerical index of the drawable you want to select – Diego Torres Milano Oct 21 '11 at 23:22
So after I *select* the drawable, how do I *change* it? – Brad Oct 22 '11 at 01:20

How to set Android ImageButton backgroundimage for different states in Java Code

2 Answers2