How can i redirect to a particular page when clicking Android device Back button using ionic framwork

I am using using ionic frame work.. How can i redirect to a particular page when clicking Android device Back button .. that is , There should make comparison of current page, and depending upon this comparison .. our back page is determining.. how it is possible???

You can override the onBackPressed() method of Activity

@Override
public void onBackPressed()
{

     super.onBackPressed();  // optional depending on your needs
  // code here to do whatever you want when back is pressed
}