用onSaveInstanceState()方法保存Activity状态

Posted 2020-11-12 君子求诸己

https://blog.csdn.net/yuzhiboyi/article/details/7677026

实现并覆盖了onSaveInstanceState方法：

[java] view plaincopy

 

 

1. @Override  
2. protected void onSaveInstanceState(Bundle outState) {  
3.     // TODO Auto-generated method stub  
4.     outState.putInt("currentposition", videoView.getCurrentPosition());  
5.     Log.v("tag", "onSaveInstanceState");  
6.     super.onSaveInstanceState(outState);  
7. }   

1.   
2. /** Called when the activity is first created. */  
3. @Override  
4. public void onCreate(Bundle savedInstanceState) {  
5.     super.onCreate(savedInstanceState);  
6.     setContentView(R.layout.main);  
7.     Log.v("tag", "onCreate");  
8.      
9.     if (videoView == null) {  
10.         videoView = (VideoView) this.findViewById(R.id.myvideo);  
11.         MediaController controller = new MediaController(this);  
12.         videoView.setMediaController(controller);  
13.         videoView.setVideoPath(VIDEO_PATH);  
14.         videoView.requestFocus();  
15.     }  
16.   
17.     if (savedInstanceState != null  
18.             && savedInstanceState.getInt("currentposition") != 0) {  
19.   
20.         videoView.seekTo(savedInstanceState.getInt("currentposition"));  
21.     }  
22.     videoView.start();  
23.   
24. }  

onCreate方法中的参数savedInstanceState就是保存的Activity一些状态。

[java] view plaincopy

 

 

1. savedInstanceState.getInt("currentposition")  

获取视频播放时间。

红色代码是将当前video的播放时间存储在Bundle中。