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.

clear the back stack. or use a base activity override on pause call finish. extend your activity from it — Raghunandan, Jan 21 '14 at 08:55

score 46 · Answer 1 · answered Jan 21 '14 at 09:22

46

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);

}

answered Jan 21 '14 at 09:22

A.Wie

489
3
6

This solution worked for me. I put `android:noHistory="true"` for my WelcomeActivity class in `AndroidManifest.xml`, but pressing back button from my WelcomeActivity did not close my app (which is what I wanted); It would take me back to my MainActivity, which is where I called `startActivityForResult()` method to go to WelcomeActivity . I had to use your solution on my WelcomeActivity class for my app to close correctly. – kimbaudi Oct 16 '16 at 05:16
Good solution.Worked for me. – silent_27 Apr 16 '19 at 17:29

score 46 · Answer 2 · edited Dec 22 '20 at 06:01

Some Activities you don't actually want to open again when the back button is pressed, such as Splash Screen Activity, Welcome Screen Activity and Confirmation Windows. Actually, you don't need this in the activity stack. You can do this using=> open Manifest.xml file and add an attribute

android:noHistory="true"

to these activities.

<activity
    android:name="com.example.shoppingapp.AddNewItems"
    android:label="" 
    android:noHistory="true">
</activity>

OR

Sometimes you want to close the entire application on a certain back button press. Here the best practice is to open up the home window instead of exiting the application. For that, you need to override the onBackPressed() method. Usually, this method opens up the top activity in the stack.

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

OR

On back button pressed you want to exit that activity and also you don't want to add this to the activity stack. Call finish() inside the onBackPressed() method. It will not close the entire application, it will just go to the previous activity in the stack.

onBackPressed() - Called when the activity has detected the user's press of the back key.

public void onBackPressed() {
  finish();
}

I have a Welcome Screen Activity that I put `android:noHistory="true"` in my `AndroidManifest.xml` file, but pressing the back button kept taking me back to my MainActivity. I also had to override the `onBackPressed()` method as you suggested in order for my back button to close my app when I am in my Welcome Screen Actiivty. I don't know why `android:noHistory="true"` didn't just work. — kimbaudi, Oct 16 '16 at 05:19
awesome code dude .. This code for exiting application onbackpressed works very well — Ameya Bonkinpelliwar, Sep 03 '17 at 16:59
I've been struggling with this for hours and this rocks , thank you <3 — Nicolas Ducom, Jun 28 '18 at 16:53

score 39 · Answer 3 · answered Jun 07 '17 at 19:54

39

You can clear all the back stack doing this.

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

answered Jun 07 '17 at 19:54

André Luiz Reis

2,273
21
14

score 26 · Answer 4 · answered Sep 12 '18 at 10:07

26

I found an interesting solution which might help.

I implemented this in my onBackPressed()

finishAffinity();
finish();

FinishAffinity removes the connection of the existing activity to its stack. And then finish helps you exit that activity. Which will eventually exit the application.

answered Sep 12 '18 at 10:07

Sujith Royal

762
10
9

2

This helped me. :) – Nikita Vishwakarma Dec 11 '18 at 10:33
1

finishAffinity() is the most important before calling finish(). Thanks. – Haris Mar 04 '22 at 12:35

Tara · Answer 5 · 2018-04-30T04:50:37.557

25

I know its too late, but no one mentioned the code which i used, so It will help others.

this moveTaskToBack work as same as Home Button. It leaves the Back stack as it is.

 public void onBackPressed() {
 //  super.onBackPressed();
    moveTaskToBack();
  }

edited Apr 30 '18 at 04:50

answered Apr 20 '16 at 09:13

Tara

2,598
1
21
30

score 9 · Answer 6 · edited Apr 28 '18 at 14:29

9

If you have more than one screen in history and need all other ones to be ignored. I recommend using this:

@Override
public void onBackPressed() {

    finish();

}

edited Apr 28 '18 at 14:29

Edric

24,639
13
81
91

answered Mar 06 '17 at 00:08

Duan Bressan

627
6
13

seems too be a good answer for my problem I came across just now. But how to prompt a user whether he really wishes to exit? I wanted to prompt a dialog box stating if he really likes to exit. If clicked on OK exit. cancel remain in the same activity. – coderpc May 01 '17 at 19:57

Haider Malik · Answer 7 · 2020-12-08T13:37:45.960

// Finish current activity
// Go back to previous activity or closes app if last activity
finish()

// Finish all activities in stack and app closes
finishAffinity()

// Takes you to home screen but app isnt closed 
// Opening app takes you back to this current activity (if it hasnt been destroyed)
Intent(Intent.ACTION_MAIN).apply {  
    addCategory(Intent.CATEGORY_HOME)
    flags = Intent.FLAG_ACTIVITY_NEW_TASK
    startActivity(this)
}

score 5 · Answer 8 · answered Jan 21 '14 at 09:10

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.

Prajwal Waingankar · Answer 9 · 2021-06-04T10:21:22.570

5

moveTaskToBack() is now Deprecated

Use :

moveTaskToBack(true);

edited Jun 04 '21 at 10:21

answered Oct 28 '18 at 20:30

Prajwal Waingankar

2,534
2
13
20

score 5 · Answer 10 · answered Oct 02 '19 at 11:03

Kotlin:

 override fun onBackPressed() {
        val exitIntent = Intent(Intent.ACTION_MAIN)
        exitIntent.addCategory(Intent.CATEGORY_HOME)
        exitIntent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP
        startActivity(exitIntent)
    }

Other codes have problems, some does not work and some needs API classification.

score 3 · Answer 11 · edited Apr 28 '18 at 07:29

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();
}

}

score 0 · Answer 12 · answered Feb 27 '17 at 14:07

0

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();

answered Feb 27 '17 at 14:07

Simon

461
1
5
23

score 0 · Answer 13 · answered Mar 25 '21 at 16:21

0

you can exit app wtih this code.

@override public void onBackPressed()

{

finishAffinity();

System.exit(0);

}

answered Mar 25 '21 at 16:21

murat.bingol

15

If it's from loader activity, just add super.onBackPressed(). – Varun Chandran Mar 26 '21 at 02:18
If you have opened different activities and want the application to be closed when you exit the activity you are in, you can use the code I wrote. – murat.bingol Mar 27 '21 at 07:54

score 0 · Answer 14 · answered May 20 '22 at 13:28

As per user experience, pressing back should never exit the application. An alertDialog should come which asks the user if they want to exit the application or they wants to stay on the application. Here is the code :

@Override
    public void onBackPressed() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setMessage("DO YOU REALLY WANT TO EXIT ??")
                .setCancelable(false)
                .setPositiveButton("YES", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int i) {
                        FirstActivity.super.onBackPressed();
                    }
                })
                .setNegativeButton("NO", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int i) {
                        dialog.cancel();
                    }
                });
        AlertDialog alertDialog = builder.create();
        alertDialog.show();
    }

Please also link to the relevant documentation. – ryanttb May 26 '22 at 20:07 — ryanttb, May 26 '22 at 20:07

score 0 · Answer 15 · answered Jul 28 '22 at 07:23

0

in AndroidManifest.xml if you write in Activity tag

android:noHistory="true"

if we backpressed this activity there is no history my app like click home button, app is background

answered Jul 28 '22 at 07:23

Muhammed Murat Göktaş

67
5

score 0 · Answer 16 · answered Mar 15 '23 at 07:14

A solution for the case when you want to prevent your app from going back to the Splash Screen when back is pressed on Main Activity, I add finish() after the intent launcher when I start the Main Activity.

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

Now when you press back on MainActivity, it will exit the app.

Exit android app on back pressed

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