Android更改按钮的文本颜色2秒钟

Question

I would like to change a button's text's color to green for 2 seconds, and then turn it back to original. How can I do this? My method is:

private void changeColors() {
    Button option1Button = (Button) findViewById(R.id.option1Button);
    Button option2Button = (Button) findViewById(R.id.option2Button);
    Button option3Button = (Button) findViewById(R.id.option3Button);
    Button option4Button = (Button) findViewById(R.id.option4Button);

    Button[] buttons = {option1Button, option2Button, option3Button, option4Button};

    buttons[correctAnswerButtonID].setTextColor(Color.GREEN);
    SystemClock.sleep(2000);
//later changing it back to original

}

This doesn't work, the text changes to green AFTER the sleep method. I want it to change to green, and then start the sleep process. Thank you for your answers!

Answer 1

you can use animation

buttons[correctAnswerButtonID].setTextColor(Color.GREEN);
buttons[correctAnswerButtonID].animate().setDuration(2000).withEndAction(new Runnable() {
            @Override
            public void run() {
                // set color back to normal
                buttons[correctAnswerButtonID].setTextColor(Color.BLACK);
            }
        }).start();