410candroid开发中，使用Handler更新UI的时候出现警告

[luqian4320]

在使用Handler更新UI的时候public class SampleActivity extends Activity {
private final Handler mLeakyHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
// TODO
}
}
}出现警告Handler Class Should be Static or Leaks Occur

[ANDYMFC_No1]

原因在于匿名内部类handler持有activity的引用，当activity finish后 handler还没有处理完，导致activity的view和resource资源不能得到释放，导致内存泄露 针对这个问题google官方给出了正确的做法 通过静态内部类 包含activity的弱引用来处理。 public class SampleActivity extends Activity { /** * Instances of static inner classes do not hold an implicit * reference to their outer class. */ private static class MyHandler extends Handler { private final WeakReference mActivity; public MyHandler(SampleActivity activity) { mActivity = new WeakReference<SampleActivity>(activity); } @Override public void handleMessage(Message msg) { SampleActivity activity = mActivity.get(); if (activity != null) { // ... } } } private final MyHandler mHandler = new MyHandler(this); /** * Instances of anonymous classes do not hold an implicit * reference to their outer class when they are “static”. */ private static final Runnable sRunnable = new Runnable() { @Override public void run() { } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Post a message and delay its execution for 10 minutes. mHandler.postDelayed(sRunnable, 60 * 10 * 1000); // Go back to the previous Activity. finish(); } }