2

Android


上机3：验证Activity生命周期
修改教材P56的例子3.1，验证P55页Activity生命周期。需要验证尽可能的生命周期路径，特别是onPause() -->onResume()。

 1 class MyObserver implements LifecycleObserver {
 2 
 3   private static final String TAG = MyObserver.class.getSimpleName();
 4   
 5   @OnLifecycleEvent(Lifecycle.Event.ON_CREATE)
 6   public void onCreate() {
 7       Log.d(TAG, "onCreate called");
 8   }
 9   
10   @OnLifecycleEvent(Lifecycle.Event.ON_START)
11   public void onStart() {
12       Log.d(TAG, "onStart called");
13   }
14 
15   @OnLifecycleEvent(Lifecycle.Event.ON_RESUME)
16   public void onResume() {
17       Log.d(TAG, "onResume called");
18   }
19 
20   @OnLifecycleEvent(Lifecycle.Event.ON_PAUSE)
21   public void onPause() {
22       Log.d(TAG, "onPause called");
23   }
24 
25   @OnLifecycleEvent(Lifecycle.Event.ON_STOP)
26   public void onStop() {
27       Log.d(TAG, "onStop called");
28   }
29 
30   @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY)
31   public void onDestroy() {
32       Log.d(TAG, "onDestroy called");
33   }
34 
35   @OnLifecycleEvent(Lifecycle.Event.ON_ANY)
36   public void onAny() {
37       Log.d(TAG, "onCreate | onStart | onResume | onPause | onStop | onDestroy called");
38   }
39 }
1 public class MyActivity extends AppCompatActivity {
2 
3   @Override
4   protected void onCreate(Bundle savedInstanceState) {
5      // ...
6      getLifecycle().addObserver(new MyObserver());
7   }
8 }

 

posted @ 2019-10-17 09:10  风吟令  阅读(257)  评论(0)  编辑  收藏  举报