Question

I am developing an android application. I wish that when I press back button in my application, it should give me a prompt(kind of alert dialog) if I really wish to exit.
I dont know where to put this alert dialog and what to write in the Yes button, where user wants to quit the application. Please help me.

Answer 1

You can override OnBackPressed() Function.

  @Override
public void onBackPressed()
{
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Exit");
    builder.setMessage("Are You Sure?");

    builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                    dialog.dismiss();
                    finish();
            }
        });

    builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            dialog.dismiss();
        }
    });
    AlertDialog alert = builder.create();
    alert.show();
}