CODEWITHSUNDEEP
javaandroidandroid-activity
user1022419
user1022419

Reputation: 21

Change Background Color of a Button in an Android Application

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!!

Upvotes: 2

Views: 10956

Answers (1)

Jong
Jong

Reputation: 9115

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.

Upvotes: 2

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