How to delay execution by 1-2 seconds?

Question

Java

Create an event handler for the button click. The logic is that when you click on the button, the button itself should light up in a certain color. Did it like this:

@Override
    public void onClick(View v) {
            v.setBackgroundResource(R.drawable.choose_answer);
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
   }

But here, for some reason, the press is first performed, then there is a delay of 2 seconds, then only the color changes.

Answer 1

postDelayed

Answer 2

You have blocked the thread of execution.
I think it's worth trying something like this:

@Override
    public void onClick(final View v) {
        new Thread(()->{
            v.setBackgroundResource(R.drawable.choose_answer);
           try {
              Thread.sleep(2000);
           } catch (InterruptedException e) {
              e.printStackTrace();
           }
        }).start();
   }