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Editorial Team
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Asked: 2026-05-28T00:44:44+00:00

I have a LinearLayout that I would like to change the background color of

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I have a LinearLayout that I would like to change the background color of when one of its child views (an ImageButton) is clicked. I am able to do this, but not immediately – the change doesn’t occur on the screen until later (I think during an onResume call). I would like to find out how to force the layout to redraw after the background is set, before the next line of code executes. Here is the onClick method of my OnClickListener for the button:

public void onClick(View v) {

  LinearLayout parentLayout = (LinearLayout) v.getParent();
  parentLayout.setBackgroundResource(R.color.my_color);
  SystemClock.sleep(1000); //ms

}

The sleep command is in there to test whether the redraw happens before or after it. The result: after. Most questions on this topic (like here and here) say to use invalidate() on the view. I have used the commands parentLayout.invalidate();, parentLayout.postInvalidate();, and parentLayout.refreshDrawableState(); in between the background and sleep lines, all to no avail. The redraw still happens after the sleep command. Can anyone tell me how to make it happen immediately?

Other possibly useful information: The LinearLayout is bound to the rows of a ListView, and the OnClickListener above is in a custom class that extends SimpleCursorAdapter, not in the activity itself. (This way I can set a listener for each of the rows in the ListView.)

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1 Answer

  1. Editorial Team

    Okay, I finally found a solution to this issue, and it’s simple. It seems that the problem was just that I was executing the drawable changes in an OnClickLIstener, when I should have been doing it in an OnTouchListener. If I set an OnTouchListener for my button that looks for ACTION_DOWN and then runs setBackgroundColor on its parent layout, the change occurs immediately.

    An alternative, less robust solution comes from this post. You can assign a selector for the parent layout background in xml, then in the OnTouchListener mentioned above, run setPressed(true) on that layout. It’s not a great solution because the selector gives you a lot less freedom than directly changing the view’s properties in code. You couldn’t set the layout background to a different color by pressing a different button, for example.

    Thanks to those who helped out with suggestions on this!

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