android - App restarting on play store open click -

 <activity             android:name=".activity.landingpage.landingpageactivity"             android:label="@string/app_name"             android:launchmode="singletop"             android:screenorientation="portrait"             android:theme="@style/apptheme.noactionbar">             <intent-filter>                 <action android:name="android.intent.action.main" />                  <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity> 

so simple. when open app launcher icon, opens.i go , click on launcher app icon again brings application front again since open.however, if go play store , click open there app has 2 instances open. if want example how working, facebook has same issue .also app fotmob has same issue think.

i had same issue. put below code launcher activity.

@override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);      if (!istaskroot()                 && getintent().hascategory(intent.category_launcher)                 && intent.action_main.equals(getintent().getaction())) {             finish();             return;         }      //other code } 

problem:

suppose have task stack [a -> b -> c] , root activity, when launch application play store task stack become(system clears top of root) [a] if have finished root activity stack like(system create new instance of root activity , place top of existing task) [b -> c -> a].

why?

because play store launch app category=launcher, action=main, flag = activity_new_task, flag = activity_brought_to_front

solution

take case have removed root activity , stack [b -> c], when try open app play store stack become [b -> c -> a]

now, not in root of stack , has category = launcher , action = main so, can remove using finish() , stack remain same [b -> c]

*note: tested on android 7.0