Android 中事件侦听器的超时检测

问题描述

我设置了事件监听器，例如:setOnClickListener 像这样

I set up event listener, for example: setOnClickListener like this

    Button stopBtn = (Button)findViewById(R.id.stop);
    stopBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            doMagic();
        }
    });

如果未按下按钮，我想将此侦听器设置为 10 秒的超时事件.用例:我有 button1 激活这个 stopBtn 监听器 10 秒，如果超时，它会被停用，我需要按 button1 使 stopBtn 再次激活.

I would like to set this listener a timeout event on 10s if button is not pressed. Use case: i have button1 that activates this stopBtn listener for 10s and if timeout comes it becomes deactivated and i need to press button1 to make stopBtn active again.

我可能做错了:

    final Handler myHandler = new Handler();
    startBtn = (Button)findViewById(R.id.start);
    myHandler.postDelayed(new Runnable() {
        public void run() {
            startBtn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Log.i(TAG,"runned");
                }
            });
        }
    }, 10000);

10 秒后，我仍然可以单击它，这可能是 cos 事件侦听器仍然附加.即使我不知道它是否被解雇，我该如何分离它.

After 10s im still able to click it and that is probably cos event listener is still attached. How can i detach it even if i don't know if its fired or not.

推荐答案

A delayed Runnable 发布在处理程序上可以管理:

A delayed Runnable posted on a Handler could manage that:

myHandler.postDelayed(new Runnable() {
 public void run() {
   if(something happened) {
     // magic work
   } else {
     // turn off the event
   }
 }
, 10000);

您可以使用这个将 Handler 初始化为实例变量代码:

You can init the Handler as an instance variable by using this code:

final Handler myHandler = new Handler();

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