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.

纽伦的原始颜色是黄色。

这是我尝试的法典的一部分:

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!!

Answer 1

你在“互换”中使用什么? 我猜测那里存在一个问题,因为你可能不会造成你准备睡觉,而这一方法(onClick)是你UI的。

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); } }

请注意,您在Click方法上将my/Button宣布为final。

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