Intent from notification isn't passed to target activity in Android -

in app have starting activity starts/restore app's activities , pass intent extras if there any:
manifest:

<activity android:name=".startactivity"          android:theme="@style/theme.appcompat.light.noactionbar.fullscreen"             android:screenorientation="sensorlandscape">             <intent-filter>                 <action android:name="android.intent.action.main" />                 <category android:name="android.intent.category.launcher" />             </intent-filter>         </activity> 

code:

public class startactivity extends appcompatactivity {     @override     protected void oncreate(@nullable bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_preloader);         string id=getintent().getstringextra("id");         log.d("push~","start activity oncreate:"+id);         intent = new intent(getintent());         openlastactivity(i);         finish();     }      @override     protected void onnewintent(intent intent) {         string id=intent.getstringextra("id");         log.d("push~","start activity new intent:"+id);         openlastactivity(intent);         super.onnewintent(intent);     }      private void openlastactivity(intent i){         i.setflags(intent.flag_activity_clear_top|intent.flag_activity_single_top);         if(gameactivity._this!=null) {             i.setclass(this,gameactivity.class);             startactivity(i);         } else {             i.setclass(this,selectoractivity.class);             startactivity(i);         }     } } 

also app has service generates notifications following content intent:

intent notificationintent= new intent(context, startactivity.class); notificationintent.putextra("id",id); pendingintent contentintent = pendingintent.getactivity(context, 0,  notificationintent, pendingintent.flag_update_current); builder.setcontentintent(contentintent); 

i expect id string passed last active activity.
problem when run app via notification tap starts app , pass id expected if there notification(when i'm still in app) neither oncreate nor onnewintent method of startactivity called therefore no data passed main activities.

upd:don't know why android:launchmode="singletask" startactivity solved problem.now intents receiving in oncreate

don't know why android:launchmode="singletask" startactivity solved problem.now intents receiving in oncreate