Hello World for GIS

1.  
2. package com.esri.arcgis.android.samples.helloworld;
3. import android.app.Activity;
   import android.os.Bundle;
4. import com.esri.android.map.MapView;
   import com.esri.android.map.ags.ArcGISTiledMapServiceLayer;
5. /**
    * The HelloWorld app is the most basic Map app
    * for the ArcGIS Runtime SDK for Android.
    * It shows how to create a {@link #mMapView} object
    * and populate it with a {@link #tileLayer} and
    * show the layer on the map. 
    *
    * @author EsriAndroidTeam
    * @version 2.0
    *
    */
6. public class HelloWorld extends Activity {
    MapView mMapView = null;
    ArcGISTiledMapServiceLayer tileLayer;
7.  /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
     
     // Retrieve the map and initial extent from XML layout
     mMapView = (MapView)findViewById(R.id.map);
     /* create a @ArcGISTiledMapServiceLayer */
     tileLayer = new ArcGISTiledMapServiceLayer(
       "http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer");
     // Add tiled layer to MapView
     mMapView.addLayer(tileLayer);
     
    }
    
8.  @Override
    protected void onPause() {
     super.onPause();
     mMapView.pause();
    }
9.  @Override
    protected void onResume() {
     super.onResume();
     mMapView.unpause();
    } 
    
   }
10.