CODEWITHSUNDEEP
androidandroid-intentbackkill-process
jimmy cool
jimmy cool

Reputation: 147

How to kill process by clicking back button in Android?

I have made an application in android .It is an application related to timer.Now i have tried a lot to put controll on back button of android device that when it is pressed the process should be killed and directly displays main menu...Please help me...Thanking you in advance..!enter image description here

Upvotes: 2

Views: 15976

Answers (8)

guardezi
guardezi

Reputation: 171

I solved this by override onBackPress() and onStop()

@Override
protected void onStop() {
    super.onStop();
    System.exit(0); //kill the app

}

@Override
public void onBackPressed() { //here I capture the event onBackPress 
    super.onBackPressed(); 
    onStop(); //call onStop
}

Upvotes: 0

Gowtham Kumar
Gowtham Kumar

Reputation: 544

Just clear the activity history so that your application gets closed.And call finsh(); afterstartActivity(); 

  <activity
        android:name="com.example.abcd.Your_Acitivty"
        android:noHistory="true">
  </activity>

Happy Coding !

Upvotes: 1

Caleb Hunyadi
Caleb Hunyadi

Reputation: 1

In the Manifest, you could try adding this

<activity
    android:name=".MainActivity"
    android:finishOnCloseSystemDialogs="true"
</activity>

I was having a similar issue, and this solved it for me.

Upvotes: 0

Ben Joseph
Ben Joseph

Reputation: 1

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        moveTaskToBack(true);
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Upvotes: 0

Shiv
Shiv

Reputation: 4567

well jimmy you can use this code to go to main screen of your device-

    finish();
    moveTaskToBack(true);
     System.exit(0);

finish() method closes current Activity only.

moveTasktoBack will hide your app and You can also kill an application quickly via android.os.Process.killProcess(android.os.Process.myPid()) if you want.

Upvotes: 0

Priya
Priya

Reputation: 1803

Try this code 

@Override
public void onBackPressed() {
   yourActivity.this.finish;
}

Upvotes: 2

Rahul Baradia
Rahul Baradia

Reputation: 11961

you can do like this onclick of back button.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
         finish();// call finish() on click of back button
    }
    return super.onKeyDown(keyCode, event);
}

for example : When you moving from A activity to B activity using startActivity(new intent(...)); don't finish or kill A activity, It ll be in stack.So when you click on back button in B activity you can go back to A activity, which is already in stack.

when you want to go back to main menu call finish() on every activity when your moving to next activity.

for example : When you moving from A activity to B activity using startActivity(new intent(...)); call finish() to kill A activity.So when you click on back button in B activity you can go back to Main Menu coz every activity ll be killed.

snippet is here :

startActivity(new intent(A.this, B.class));
finish(); // when you click back button on B activity, directly you can go to main menu

Updated : Other way to kill the app using below code on back button pressed. But not recommended

 @Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
         android.os.Process.killProcess(android.os.Process.myPid());// Kill the app on click of back button.
    }
    return super.onKeyDown(keyCode, event);
}

hope this might help you to understand the concept.

Upvotes: 1

Renjith
Renjith

Reputation: 5803

override onBackPressed() in your activity and add your necessary codes there

onBackPressed

Called when the activity has detected the user's press of the back key. The default implementation simply finishes the current activity, but you can override this to do whatever you want.

Upvotes: 2

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