Custom Alert message when Back button is Pressed in Android

Prevent the closing of Application on click back button

Here we go for a simple code which will prevent your application from closing on click backbutton [Hardware-Android phone].

Thus the code begins :

@Override
public void onBackPressed() {
// TODO Auto-generated method stub
super.onBackPressed();

AlertDialog.Builder alertbox=new AlertDialog.Builder(Firstpage.this);
alertbox.setTitle("Warning");
    alertbox.setIcon(R.drawable.info);
    alertbox.setMessage("Exit Application?");
    alertbox.setPositiveButton("Yes", new
    DialogInterface.OnClickListener() {
    public void onClick(DialogInterface arg0, int arg1) {
    finish();
    }
    });
    alertbox.setNegativeButton("No", new
    DialogInterface.OnClickListener() {
    public void onClick(DialogInterface arg0, int arg1) {
    }
    });
    alertbox.show();
}

Thus it will generate alertbox ,onclick yes it will close the app: