Simple Exit dialog box in android studio with code in java

 Step 1- In  MainActivity.java file override an method onBackPressed()

Write this code in this method

@Override
public void onBackPressed() {
    //--------> Create a dialog for Show dialog after click backed --->//
    AlertDialog.Builder builder =  new AlertDialog.Builder(this);
    builder.setMessage("Are you sure you want to exit ?")
            .setCancelable(false)
            //--------> Code for Exit from app --->//
            .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                  
                    MainActivity.super.onBackPressed();
                }
                //--------> Code for cancel --->//
            }).setNegativeButton("No", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
           
            dialog.cancel();
        }
    });
    builder.create();
    builder.show();
}

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