看一段代码：
package com.example.threaddemo;import android.os.Bundle;import android.os.Handler;import android.app.Activity;import android.util.Log;import android.view.Menu;public class ThreadDemo extends Activity {private static final String TAG = "ThreadDemo";private int count = 0; private Handler mHandler = new Handler(); private Runnable mRunnable = new Runnable() {@Overridepublic void run() {Log.e(TAG, Thread.currentThread().getName() + " " +count);++count;setTitle("" +count);//Performed once every two secondsmHandler.postDelayed(mRunnable, 2000);}};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_thread_demo); mHandler.post(mRunnable); }}然后我们按返回键退出。
再进来。发现问题：
就是说，除了之前运行的runable，又多了一个
如何解决，，在ondrestroy方法中添加
mHandler.removeCallbacks(mRunnable);
@Overrideprotected void onDestroy() {mHandler.removeCallbacks(mRunnable);super.onDestroy();}
抱最大的希望，为最大的努力，做最坏的打算
