CODEWITHSUNDEEP
androidback
dequec64
dequec64

Reputation: 933

Confirm back prompt to exit app

I'm currently working on an app that uses a lot the back button of android devices. I was wondering how to check if the activity is the last one and if the user presses back again, it doesn't exit the app except if the user presses back again, like with the 9gag app.

Thank you!

Upvotes: 3

Views: 6963

Answers (4)

user10064179
user10064179

Reputation: 1

This will not Worke OnBackpress method

@Override
public void onBackPressed() {
    new AlertDialog.Builder(this)
        .setIcon(android.R.drawable.ic_dialog_alert)
        .setTitle("Closing Activity")
        .setMessage("Are you sure you want to close this activity?")
        .setPositiveButton("Yes", new DialogInterface.OnClickListener(){
        @Override
        public void onClick(DialogInterface dialog, int which) {
            finish();    
        }

    })
    .setNegativeButton("No", null)
    .show();
}

Upvotes: 0

Daniel Zolnai
Daniel Zolnai

Reputation: 16910

With the method Activity.isTaskRoot() you can check if the user will exit the app on pressing the back button.

Then you just have override onBackPressed() to handle it differently than usual.

Upvotes: 4

Volodymyr Kulyk
Volodymyr Kulyk

Reputation: 6546

Here example:

private boolean doubleBackToExitPressedOnce;
@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    }
    if (doubleBackToExitPressedOnce) {
        super.onBackPressed();
    }

    this.doubleBackToExitPressedOnce = true;
    Toast.makeText(this, this.getResources().getString(R.string.exit_toast), Toast.LENGTH_SHORT).show();

    new Handler().postDelayed(new Runnable() {

        @Override
        public void run() {
            doubleBackToExitPressedOnce = false;
        }
    }, 2000);
}

DrawerLayout block is optional.

Upvotes: 3

Henry
Henry

Reputation: 1042

@Override
public void onBackPressed() {
    new AlertDialog.Builder(this)
        .setIcon(android.R.drawable.ic_dialog_alert)
        .setTitle("Closing Activity")
        .setMessage("Are you sure you want to close this activity?")
        .setPositiveButton("Yes", new DialogInterface.OnClickListener()
    {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            finish();    
        }

    })
    .setNegativeButton("No", null)
    .show();
}

Upvotes: 7

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