android - How to close app/activity or code menu item via intent/pendingIntent in Chrome Custom Tabs -

i'm trying understand how chrome custom tabs work. following guidelines, adding custom item menu done using pendingintent, such as:

intent intent =  new intent(intent.action_view, uri.parse("http://google.com")); pendingintent pendingintent =  pendingintent         .getactivity(this, 0, intent, pendingintent.flag_update_current); customtabsintent = new customtabsintent.builder()         .addmenuitem("visit google website", pendingintent)         .build(); 

i know how use pendingintent direct website or create 'share' action. question possible more complex tasks adding 'close' menu item close activity or exit app; or 'connect' menu item method, when user clicks on code method process. guess second if possible make easy solution first.

i tried search answers, if search how close or end activity or app (or similar) using intent or pendingintent, use of 'finish();' or 'startactivity(intent);' or similar, cannot apply here since don't know how or call it. tried reading use of intent , pendingintent, cannot figure out how to, let's close activity or process without being able call method.

i appreciate help, links resources or pointers need read/learn next able understand this.

this solution using brodcastreceiver:

in activity (mainactivity in case) starting chrome custom tabs (cct), create static field identify if activity created broadcastreceiver, , setter can set broadcastreceiver:

    // determining if activity started broadcastreceiver     private static boolean frombroadcastreceiver = false;      public static void setfrombroadcastreceiver(boolean bool) {         frombroadcastreceiver = bool;     } 

create public class broadcastreceiver. overriding onreceive method, create instance of mainactivity , set frombroadcastreceiver true. create intent activity , intent restarting using first intent. close cct , restart activity using latter intent:

import android.content.broadcastreceiver; import android.content.componentname; import android.content.context; import android.content.intent; import android.support.v4.content.intentcompat;  public class cctbroadcastreceiver extends broadcastreceiver {      @override     public void onreceive(context context, intent intent) {          // create instance of mainactivity , set frombroadcastreceiver flag true.         mainactivity mainactivity = new mainactivity();         mainactivity.setfrombroadcastreceiver(true);          // create intent activity , intent restarting using first intent.         intent intent = new intent(context, mainactivity.getclass());         componentname compname = intent.getcomponent();         intent mainintent = intentcompat.makerestartactivitytask(compname);          // restart activity using later intent (also close cct)         mainintent.addflags(intent.flag_activity_clear_top | intent.flag_activity_new_task);         mainintent.addflags(intent.flag_activity_no_history);         context.startactivity(mainintent);      } // end onreceive.  } // end broadcastreceiver class. 

don't forget register receiver in androidmanifest.xml:

...         </activity>      <receiver         android:name=".cctbroadcastreceiver"         android:enabled="true">     </receiver>  </application> 

now, inside oncreate of mainactivity check if created broadcastreceiver, , if reset 'flag' , finish() activity:

        // check if activity created broadcastreceiver, , if reset 'flag' , finish() activity.         if (frombroadcastreceiver) {             setfrombroadcastreceiver(false);             finish();             return;         } 

don't forget use broadcastreceiver class creating intent , pendingintent cct:

     intent broadcastintent =  new intent(this, cctbroadcastreceiver.class);      pendingintent pendingintent = pendingintent.getbroadcast(this, 0, broadcastintent, pendingintent.flag_update_current); 

and you're done. code inside broadcastreceiver closes cct (similar if clicked on cct default close button). adding 'flag' , code inside mainactivity further closes mainactivity.