replace image on ImageButton - android

I'm new to andorid, and I'm trying to do a simple thing:
when button A is clicked, I want to replace the image displayed
on ImageButton B.
I've tried all sort of things like:
msortByButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//Test change image
mdefineLocationButton.setBackgroundResource(0);
mdefineLocationButton.invalidate();
mdefineLocationButton.setBackgroundResource(R.drawable.notdefined);
mdefineLocationButton.invalidate();
mdefineLocationButton.refreshDrawableState();
}
});
But it seems that the new image is painted, but on top of it the old image
is painted also. (I can see the old image, below it I can see edges of the new image).
Any idea how to do this right?
Thanks,
Omer


Use setImageResource (int resId)
(http://developer.android.com/reference/android/widget/ImageView.html#setImageResource(int))
ImageButtons can have a background and an actual image src. My guess is initially you set the image src and now in code you are setting the background. So both show.
#Override
public void onClick(View v) {
mdefineLocationButton.setImageResource(R.drawable.notdefined);
}

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