Exit android app on back pressed

Question

I am building an Android App. How to exit an Android App when back is pressed. Android version is 2.3.3 and above. The Android App goes to previous activity which i don\'t want.

Answer 1

moveTaskToBack(); is now deprecated... Instead use : moveTaskToBack(true);

Answer 2

You can clear all the back stack doing this.

@Override
public void onBackPressed() {
    finishAffinity();
}

Answer 3

In normal way you shouldn't close app - user will moves it to back by pressing home or closing your activities by pressing back.

But you can use this tips:

1) Close old activities after starting the new ones if they not needed in back stack:

startActivity(newActivityIntent);
finish();

2) You can move task to back (instead of close) if you need http://developer.android.com/reference/android/app/Activity.html#moveTaskToBack(boolean)

3) If you are really need it, you can use System.exit(0) but it's strongly not recommended and usually says that you have application's architecture problems.

Answer 4

Just use the code finish(); under your intent to close the activity. So, It will not appear again. This solved mine.

startActivity(new Intent(SplashActivity.this, MainActivity.class));
finish();

Answer 5

Try this

public void onBackPressed(){
Intent a = new Intent(Intent.ACTION_MAIN);
a.addCategory(Intent.CATEGORY_HOME);
a.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(a);

}

Answer 6

Pop Up

     @Override
     public void onBackPressed() {
     new AlertDialog.Builder(this)
       .setTitle("Really Exit?")
       .setMessage("Are you sure you want to exit?")
       .setNegativeButton(android.R.string.no, null)
       .setPositiveButton(android.R.string.yes, new OnClickListener() {

    public void onClick(DialogInterface arg0, int arg1) {
    WelcomeActivity.super.onBackPressed();
        }
    }).create().show();

}

Set Class to Top of App and no history

Intent launchNextActivity;
launchNextActivity = new Intent(B.class, A.class);
launchNextActivity.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
launchNextActivity.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);                  

launchNextActivity.addFlags(Intent.FLAG_ACTIVITY_NO_ANIMATION);
startActivity(launchNextActivity);

enter code here Double back press

private static long back_pressed;
@Override
public void onBackPressed(){
if (back_pressed + 2000 > System.currentTimeMillis()){
super.onBackPressed();
}
else{
Toast.makeText(getBaseContext(), "Press once again to exit", 
Toast.LENGTH_SHORT).show();
back_pressed = System.currentTimeMillis();
}

}