更改Android应用程序中按钮的背景颜色 [英] Change Background Color of a Button in an Android Application

问题描述

我想在点击按钮时更改按钮的背景颜色。我的目标是颜色应该改变5秒然后再改变为另一种颜色。

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.

按钮的原始颜色是黄色。

The original color of the button is yellow.

以下是我尝试的代码的一部分：

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);
}

按钮将颜色变为红色但从不变为蓝色。我怀疑视图直到稍后才会刷新。我希望在等待行之前刷新按钮。
我也试过 myTestButton.invalidate（）但无济于事。

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.

提前致谢对于这个有一些很棒的提示!!

Thanks in advance for some great tips on this!!

推荐答案

你在等待线中使用了什么？我想那里有一个问题，因为你可能不会导致你的UI线程在那里睡觉，并且这个方法（onClick）由你的UI线程调用。

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.

我建议你使用方法 View.postDelayed（Runnable action，long delayMills 来做到这一点。
示例：

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);
    }
}

注意你muest声明你的onClick方法中的myTestButton 为 final 。

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

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