1 public class DemoActivity extends Activity {
 2
 3     //1、activity第一次被创建的时候，执行
 4     @Override
 5     public void onCreate(Bundle savedInstanceState) {
 6         super.onCreate(savedInstanceState);
 7         setContentView(R.layout.main);
 8         System.out.println("onCreate");
 9         int page = 0;
10         if(savedInstanceState!=null){
11              page = savedInstanceState.getInt("page");
12              System.out.println("重新定位到："+page+"页");//切换屏幕时，重新获取上次读取到的页码
13         }
14     }
15     //2、界面用户可见的时候，执行
16     @Override
17     protected void onStart() {
18         // TODO Auto-generated method stub
19         super.onStart();
20         System.out.println("onStart");
21     }
22     //3、界面上的按钮，文本等可被触摸时，执行
23     @Override
24     protected void onResume() {
25         // TODO Auto-generated method stub
26         super.onResume();
27         System.out.println("onResume");
28     }
29
30     @Override
31     protected void onRestart() {
32         // TODO Auto-generated method stub
33         super.onRestart();
34         System.out.println("onRestart");
35     }
36
37     //4、界面上的按钮，文本等不可被触摸时，执行
38     @Override
39     protected void onPause() {
40         // TODO Auto-generated method stub
41         super.onPause();
42         System.out.println("onPause");
43     }
44
45     //在activity异常退出时，执行，保存信息到Bundle对象中去
46     @Override
47     protected void onSaveInstanceState(Bundle outState) {
48         super.onSaveInstanceState(outState);
49         outState.putInt("page", 250);//保存当前读取到的页码
50     }
51     //5、activity用户不可见
52     @Override
53     protected void onStop() {
54         // TODO Auto-generated method stub
55         super.onStop();
56         System.out.println("onStop");
57     }
58
59     //6、activity被销毁的时候，执行
60     @Override
61     protected void onDestroy() {
62         // TODO Auto-generated method stub
63         super.onDestroy();
64         System.out.println("onDestroy");
65     }
66
67 }

1 android:configChanges="keyboardHidden|orientation"