Activity生命周期总结

看了很多别人的总结，自己也写了一个。

虽然比较简单，但是作为资料备在这里还是不错的~

先放老图一张：

 

附上测试代码：

package uni.activity;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

public class ActivityDemoActivity extends Activity {
    /** Called when the activity is first created. */
	
	private static final String TAG = "demo";  
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Log.d("demo", "the Activity onCreate ");  
    }
    
    protected void onStart(){  
    	super.onStart(); 
    	Log.i(TAG, "The activity state---->onStart");  
    }  
    
    protected void onRestart(){ 
		super.onRestart(); 
		Log.i(TAG, "The activity state---->onRestart"); 
    } 

    protected void onResume(){ 
    	super.onResume(); 
    	Log.i(TAG, "The activity state---->onResume"); 
    } 

    protected void onPause(){  
    	super.onPause(); 
    	Log.i(TAG, "The activity state---->onPause"); 
    } 

    protected void onStop(){  
    	super.onStop(); 
    	Log.i(TAG, "The activity state---->onStop");
    } 

    protected void onDestroy(){  
    	super.onDestroy(); 
    	Log.i(TAG, "The activity state---->onDestroy");
    }  
}

 

代码比较简单，主要是看各种操作下，程序时如何变化的

• 1. 程序启动时候

11-25 07:34:58.828: DEBUG/demo(1093): the Activity onCreate
11-25 07:34:58.859: INFO/demo(1093): The activity state---->onStart
11-25 07:34:58.859: INFO/demo(1093): The activity state---->onResume

 

• 2. 已启动，点击返回按钮

11-25 07:38:00.929: INFO/demo(1093): The activity state---->onPause
11-25 07:38:01.099: INFO/demo(1093): The activity state---->onStop
11-25 07:38:01.099: INFO/demo(1093): The activity state---->onDestroy

 

• 3. 已启动，home按钮/接听电话时

11-25 07:39:47.528: INFO/demo(1093): The activity state---->onPause
11-25 07:39:47.938: INFO/demo(1093): The activity state---->onStop

 

• 4. 接上，从home界面再进入程序/挂断电话

11-25 07:42:27.629: INFO/demo(1093): The activity state---->onRestart
11-25 07:42:27.629: INFO/demo(1093): The activity state---->onStart
11-25 07:42:27.638: INFO/demo(1093): The activity state---->onResume

 

• 5. 另：程序里有多个Activity情况。假定有两个Activity：A,B
• 5.1 A进入B的情况：

A.onPause

B.onCreate

B.onStart

B.onResume

A.onStop

 

• 5.2 在B里，按返回键

B.onPause

A.onReatart

A.onStart

A.onResume

B.onStop

B.onDestroy