Android listening Home Key (Android: launchmode = "singletask" and onnewintent (intent) Usage

Android: launchmode = "singletask" and onnewintent (intent) are two features. Here, we will summarize the experience:

Android: launchmode = "singletask" is configured in mainifest, which ensures that there is always only one activity in the stack, no matter how many times you start it;

Onnewintent (intent) is the parent class method of the override activity. It is called only when you click the Home Key to exit the activity and start a new intent again;

They can be used together to listen to the Home Key (only when a new intent is initiated ).

The Code is as follows:

Manifest. xml

< activity   android:name = ".OnNewIntentDemo"               android:launchMode = "singleTask"                     android:label = "@string/app_name" >               < intent-filter >                   < action   android:name = "android.intent.action.MAIN"   />                   < category   android:name = "android.intent.category.LAUNCHER"   />               </ intent-filter >               < intent-filter >                   < action   android:name = "android.intent.action.VIEW"   />                    < category   android:name = "android.intent.category.DEFAULT"   />                    < data   android:mimeType = "video/*"   />                </ intent-filter >    </ activity >    

Code in Activity

@Override    protected   void  onNewIntent(Intent intent) {    if (DEBUG) Log.i(TAG,  "onNewIntent ~~~~~~~ intent = " +intent);    super .onNewIntent(intent);   }