android - How to disable virtual home button in any activity? -

i need disable 3 virtual buttons in activity in app. disabled button , multitask button somehow cannot dsable home button.

i tried onattachedtowindow() style answers on stackoverflow didn't work me.

i don't want disable home button entire app, want disable single activity window. helps!

note : highly encourage not in app, if want deploy it. show how can it.

since android 4 there no effective method disable home button.it needs little hack. think need kiosk mode in app. in general idea detect when new application in foreground , restart activity immediately. processes below..

at first create class called kioskservice extends service , add following snippet :

 public class kioskservice extends service {    private static final long interval = timeunit.seconds.tomillis(2); // periodic interval check in seconds -> 2 seconds   private static final string tag = kioskservice.class.getsimplename();   private static final string pref_kiosk_mode = "pref_kiosk_mode";    private thread t = null;   private context ctx = null;   private boolean running = false;    @override   public void ondestroy() {     log.i(tag, "stopping service 'kioskservice'");     running =false;     super.ondestroy();   }    @override   public int onstartcommand(intent intent, int flags, int startid) {     log.i(tag, "starting service 'kioskservice'");     running = true;     ctx = this;      // start thread periodically checks if app in foreground     t = new thread(new runnable() {       @override       public void run() {         {           handlekioskmode();           try {             thread.sleep(interval);           } catch (interruptedexception e) {             log.i(tag, "thread interrupted: 'kioskservice'");           }         }while(running);         stopself();       }     });      t.start();     return service.start_not_sticky;   }    private void handlekioskmode() {     // kiosk mode active?        if(iskioskmodeactive()) {         // app in background?       if(isinbackground()) {         restoreapp(); // restore!       }     }   }    private boolean isinbackground() {     activitymanager = (activitymanager) ctx.getsystemservice(context.activity_service);      list<activitymanager.runningtaskinfo> taskinfo = am.getrunningtasks(1);     componentname componentinfo = taskinfo.get(0).topactivity;     return (!ctx.getapplicationcontext().getpackagename().equals(componentinfo.getpackagename()));   }    private void restoreapp() {     // restart activity     intent = new intent(ctx, myactivity.class);     i.addflags(intent.flag_activity_new_task);     ctx.startactivity(i);   }    public boolean iskioskmodeactive(final context context) {     sharedpreferences sp = preferencemanager.getdefaultsharedpreferences(context);     return sp.getboolean(pref_kiosk_mode, false);   }    @override   public ibinder onbind(intent intent) {     return null;   } } 

add following method in appcontext class start service via application context creation.

@override public void oncreate() {   super.oncreate();   instance = this;   registerkioskmodescreenoffreceiver();   startkioskservice();  // add }  private void startkioskservice() { // ... , method   startservice(new intent(this, kioskservice.class)); } 

you appcontext class looks

  public class appcontext extends application {    private appcontext instance;   private powermanager.wakelock wakelock;   private onscreenoffreceiver onscreenoffreceiver;     @override   public void oncreate() {     super.oncreate();     instance = this;     registerkioskmodescreenoffreceiver();   }    private void registerkioskmodescreenoffreceiver() {     // register screen off receiver     final intentfilter filter = new intentfilter(intent.action_screen_off);     onscreenoffreceiver = new onscreenoffreceiver();     registerreceiver(onscreenoffreceiver, filter);   }    public powermanager.wakelock getwakelock() {     if(wakelock == null) {       // lazy loading: first call, create wakelock via powermanager.       powermanager pm = (powermanager) getsystemservice(context.power_service);       wakelock = pm.newwakelock(powermanager.full_wake_lock | powermanager.acquire_causes_wakeup, "wakeup");     }     return wakelock;   } } 

add service declaration , permission retrieving foreground process manifest:

<service android:name=".kioskservice" android:exported="false"/> <uses-permission android:name="android.permission.get_tasks"/> //added permission edit 1 <uses-permission android:name="android.permission.wake_lock" /> 

i've seen @ 1 site forgot link, whatever have contents , codes, posting answer. link, share you.