How to exit when back button is pressed

Question

When a user presses the back button on an intent  the application should quit  How can I ensure the application quits when the back button is pressed

User · Answer

To exit from an Android app  just simply use  in your Main Activity  or you can use Android manifest file to set  android noHistory  true

User · Answer

First of all  Android does not recommend you to do that within the back button  but rather using the lifecycle methods provided  The back button should not destroy the Activity   Activities are being added to the stack  accessible from the Overview  square button since they introduced the Material design in 5 0  when the back button is pressed on the last remaining Activity from the UI stack  If the user wants to close down your app  they should swipe it off  close it  from the Overview menu   Your app is responsible to stop any background tasks and jobs you don t want to run  on onPause    onStop   and onDestroy   lifecycle methods  Please read more about the lifecycles and their proper implementation here  http   developer android com training basics activity-lifecycle stopping html  But to answer your question  you can do hacks to implement the exact behaviour you want  but as I said  it is not recommended    Override  public void onBackPressed         make sure you have this outcommented    super onBackPressed     Intent intent   new Intent Intent ACTION MAIN    intent addCategory Intent CATEGORY HOME    intent setFlags Intent FLAG ACTIVITY NEW TASK    startActivity intent

User · Answer

Add this code in the activity from where you want to exit from the app on pressing back button    Override public void onBackPressed         super onBackPressed        exitFromApp       private void exitFromApp         Intent intent   new Intent Intent ACTION MAIN       intent addCategory Intent CATEGORY HOME       startActivity intent

User · Answer

finish your current activity using method finish   onBack method of your current activity  and then add below lines in onDestroy of the current activity for Removing Force close   Override public void onDestroy         android os Process killProcess android os Process myPid         super onDestroy

User · Answer

Use onBackPressedmethod   Override public void onBackPressed         finish        super onBackPressed        This will solve your issue

User · Answer

The app will only exit if there are no activities in the back stack  SO add this line in your manifest  android noHistory  true  to all the activities that you dont want to be back stacked And then to close the app call the finish   in the OnBackPressed   lt activity android name   activities DemoActivity              android screenOrientation  portrait                android noHistory  true                  gt

User · Answer

Why wouldn t the user just hit the home button  Then they can exit your app from any of your activities  not just a specific one   If you are worried about your application continuing to do something in the background  Make sure to stop it in the relevant onPause and onStop commands  which will get triggered when the user presses Home    If your issue is that you want the next time the user clicks on your app for it to start back at the beginning  I recommend putting some kind of menu item or UI button on the screen that takes the user back to the starting activity of your app  Like the twitter bird in the official twitter app  etc

User · Answer

In my Home Activity I override the  onBackPressed  to    Override public void onBackPressed        Intent intent   new Intent Intent ACTION MAIN      intent addCategory Intent CATEGORY HOME      intent setFlags Intent FLAG ACTIVITY NEW TASK      startActivity intent        so if the user is in the home activity and press back  he goes to the home screen   I took the code from Going to home screen Programmatically

User · Answer

I modified  Vlad Spays answer so that the back button acts normally unless it s the last item in the stack  then it prompts the user before exiting the app    Override public void onBackPressed        if  isTaskRoot             if  backButtonCount  gt   1               Intent intent   new Intent Intent ACTION MAIN               intent addCategory Intent CATEGORY HOME               intent setFlags Intent FLAG ACTIVITY NEW TASK               startActivity intent            else              Toast makeText this   Press the back button once again to close the application    Toast LENGTH SHORT  show                backButtonCount                   else          super onBackPressed

User · Answer

you can simply use this    startActivity new Intent this  Splash class     moveTaskToBack true     The startActivity new Intent this  Splash class    is the first class that will be lauched when the application starts  moveTaskToBack true   will minimize your application

User · Answer

A better user experience          Back button listener     Will close the application if the back button pressed twice       Override public void onBackPressed         if backButtonCount  gt   1                Intent intent   new Intent Intent ACTION MAIN           intent addCategory Intent CATEGORY HOME           intent setFlags Intent FLAG ACTIVITY NEW TASK           startActivity intent             else               Toast makeText this   Press the back button once again to close the application    Toast LENGTH SHORT  show            backButtonCount

User · Answer

Immediately after you start a new activity  using startActivity  make sure you call finish   so that the current activity is not stacked behind the new one   EDIT With regards to your comment   What you re suggesting is not particularly how the android app flow usually works  and how the users expect it to work  What you can do if you really want to  is to make sure that every startActivity leading up to that activity  is a startActivityForResult and has an onActivityResult listener that checks for an exit code  and bubbles that back  You can read more about that here  Basically  use setResult before finishing an activity  to set an exit code of your choice  and if your parent activity receives that exit code  you set it in that activity  and finish that one  etc

[android] How to exit when back button is pressed?

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