title: How to know if I should use ldpi in a layout
body: <p>Hi guys, I'm working on implementing multiple screen support.
  Is a similar case possibile?</p>
  
  <pre><code> @Override
   protected void onCreate(Bundle savedInstanceState) {
  
       super.onCreate(savedInstanceState);
       setContentView(R.layout.contatti);
  
      //if (device in use , use ldpi ) { do something
      else{
  
  
       Button btnNavigator = (Button) findViewById(R.id.btnNavigator);
  
       GoogleMap map=((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map)).getMap();
       map.moveCamera(CameraUpdateFactory.newLatLngZoom(STARTING_POINT, 5));
  </code></pre>
  
  <p>Thank you so much. Can you show me an example please?</p>