Activity之affinity

<activity android:name=".MainActivity" 
	  android:taskAffinity=".cwp.affinity" >
	<intent-filter> 
		 <action android:name="android.intent.action.MAIN" />
		 <category android:name="android.intent.category.LAUNCHER" /> 
	</intent-filter> 
</activity>

<strong>Application Activity taskAffinity allowTaskReparenting </strong>

application1 Activity1 com.winuxxan.affinity true

application2 Activity2 com.winuxxan affinity false 

<application android:icon="@drawable/icon" 
	     android:label="@string/app_name">
 	<activity android:name=".Activity1" 
		  android:taskAffinity="com.winuxxan.task" 
		  android:label="@string/app_name">
 	</activity>
 
	<activity android:name=".Activity2"> 
		<intent-filter> 
			<action android:name="android.intent.action.MAIN" />
 			<category android:name="android.intent.category.LAUNCHER" /> 
		</intent-filter>
 	</activity>
</application>

public class Activity2 extends Activity {
   
    private static final String TAG = "Activity2";
  
    @Override protected void
    onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main2); }
        @Override public boolean onTouchEvent(MotionEvent event) { 
            
                Intent intent = new Intent(this, Activity1.class);
                intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent);
                return super.onTouchEvent(event); 
        }
}

<application android:icon="@drawable/icon"
             android:label="@string/app_name"> 
    <activity 
        android:name=".MyActivity" 
        android:taskAffinity="com.winuxxan.task" 
        android:label="@string/app_name"> 

         <intent-filter> 
             <action android:name="android.intent.action.MAIN"/>
             <category android:name="android.intent.category.LAUNCHER"/> 
         </intent-filter> 
    </activity>

我们首先启动MyActivity，然后按Home键，返回到桌面，然后打开Activity2，点击Activity2，进入Activity1。然后按返回键。我们发现，我们进入Activity的顺序为Activity2->Activity1，而返回时顺序为 Activity1->MyActivity。这就说明了一个问题，Activity1在启动时，重新宿主到了MyActivity所在的Task 中去了。