java - how to trigger an imagebutton programmatically in android studio -

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i want trigger imagebutton according value gets stored in variable.
eg: let variable amount. if amount<10 , amount>50 imagebutton should triggered.
here, through imagebutton i'm turning on , off flashlight. so, if the
amount>10 , <30 flashlight turns on
amount>30 , <50 flashlight turns off

secondly, i'm getting value in string form function, converted integer , stored in amount variable.

java code: 

integer amount; public void oncreate(bundle savedinstancestate)     {         super.oncreate(savedinstancestate);         log.d("bluetooth_torch", "oncreate()");         setcontentview(r.layout.activity_bluetooth_torch);            mtorchonoffbutton = (imagebutton)findviewbyid(r.id.button_on_off);         istorchon = false;                 boolean isflashavailable = getapplicationcontext().getpackagemanager()                 .hassystemfeature(packagemanager.feature_camera_flash);          if (!isflashavailable) {              alertdialog alert = new alertdialog.builder(bluetooth_torch_activity.this)                     .create();             alert.settitle("error !!");             alert.setmessage("your device doesn't support flash light!");             alert.setbutton(dialoginterface.button_positive, "ok", new dialoginterface.onclicklistener() {                 public void onclick(dialoginterface dialog, int which) {                     // closing application                     finish();                     system.exit(0);                 }             });             alert.show();             return;         }          mcameramanager = (cameramanager)getsystemservice(context.camera_service);         try {             mcameraid = mcameramanager.getcameraidlist()[0];         } catch (cameraaccessexception e) {             e.printstacktrace();         }          amount = integer.parseint(data);         mtorchonoffbutton.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 try {                     if (istorchon) {                             turnoffflashlight();                             istorchon = false;                     } else {                             turnonflashlight();                             istorchon = true;                     }                 } catch (exception e) {                     e.printstacktrace();                 }             }         });     }

mtorchonoffbutton.callonclick()


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