Change Background Color of a Button in an Android Application

Question

I would like to change the background color of a button when I click it. My goal is that the color should be changed for 5 seconds and then change again to another color.

The original color of the button is yellow.

Here is a part of the code I have tried:

public void click(View view){
  myTestButton = (Button)view;
  myTestButton.setBackgroundColor(Color.BLUE);
  //*Wait lines;*
  myTestButton.setBackgroundColor(Color.RED);
}

The button changes color to red but never to blue. I suspect that the view does not refresh until later. I want the button to be refreshed before the wait lines. I've also tried myTestButton.invalidate() but to no avail.

Thanks in advance for some great tips on this!!

Solution

What are you using in your "wait lines"? I guess there is a problem there, as you may not cause your UI thread to sleep there, and this method (onClick) IS called by your UI thread.

I suggest you to use the method View.postDelayed(Runnable action, long delayMills to do that. Example:

myTestButton.postDelayed(new Runnable() {
    public void run() {
        myTestButton.setBackgroundColor(Color.RED);
    }
}

Note that you muest declare myTestButton as final in your onClick method.