Implement LocationSource and LocationListener for Google Maps Android API v2

Example to Implement LocationSource and LocationListener for Google Maps Android API v2.

package com.example.androidmapsv2;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.LocationSource;
import com.google.android.gms.maps.MapFragment;

import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity 
  implements LocationSource, LocationListener{
 
 final int RQS_GooglePlayServices = 1;
 private GoogleMap myMap;
 TextView tvLocInfo;
 
 LocationManager myLocationManager = null;
 OnLocationChangedListener myLocationListener = null;
 Criteria myCriteria;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvLocInfo = (TextView)findViewById(R.id.locinfo);
        
        FragmentManager myFragmentManager = getFragmentManager();
        MapFragment myMapFragment 
         = (MapFragment)myFragmentManager.findFragmentById(R.id.map);
        myMap = myMapFragment.getMap();
        
        myMap.setMyLocationEnabled(true);
        
        myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
        
        myCriteria = new Criteria();
        myCriteria.setAccuracy(Criteria.ACCURACY_FINE);
        myLocationManager = (LocationManager)getSystemService(LOCATION_SERVICE);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  switch (item.getItemId()) {
  case R.id.menu_legalnotices:
   String LicenseInfo = GooglePlayServicesUtil.getOpenSourceSoftwareLicenseInfo(
     getApplicationContext());
   AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(MainActivity.this);
   LicenseDialog.setTitle("Legal Notices");
   LicenseDialog.setMessage(LicenseInfo);
   LicenseDialog.show();
   return true; 
  }
  return super.onOptionsItemSelected(item); 
 }

 @Override
 protected void onResume() {
  super.onResume();
  
  int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
  
  if (resultCode == ConnectionResult.SUCCESS){
   Toast.makeText(getApplicationContext(), 
     "isGooglePlayServicesAvailable SUCCESS", 
     Toast.LENGTH_LONG).show();
   
   //Register for location updates using a Criteria, and a callback on the specified looper thread.
   myLocationManager.requestLocationUpdates(
     0L,    //minTime
     0.0f,    //minDistance
     myCriteria,  //criteria
     this,    //listener
     null);   //looper
   
   //Replaces the location source of the my-location layer.
      myMap.setLocationSource(this);
   
  }else{
   GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices); 
  }
  
 }

 @Override
 protected void onPause() {
  myMap.setLocationSource(null);
  myLocationManager.removeUpdates(this);
     
  super.onPause();
 }

 @Override
 public void activate(OnLocationChangedListener listener) {
  myLocationListener = listener;
 }

 @Override
 public void deactivate() {
  myLocationListener = null;
 }

 @Override
 public void onLocationChanged(Location location) {
  if (myLocationListener != null) {
   myLocationListener.onLocationChanged(location);
   
   double lat = location.getLatitude();
   double lon = location.getLongitude();
   
   tvLocInfo.setText(
     "lat: " + lat + "\n" +
     "lon: " + lon);
  }
 }

 @Override
 public void onProviderDisabled(String arg0) {
  // TODO Auto-generated method stub
  
 }

 @Override
 public void onProviderEnabled(String arg0) {
  // TODO Auto-generated method stub
  
 }

 @Override
 public void onStatusChanged(String arg0, int arg1, Bundle arg2) {
  // TODO Auto-generated method stub
  
 }

}

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- Detect and animate to user location


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A simple example using Google Maps Android API v2, step by step.