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copied!<p>Please try to use my running code.</p> <p>Firstly import Google play service library project from <code>/Android/android-sdk-linux/extras/google/google_play_services</code> and after that create new project and write this code.</p> <pre><code>//Main Activity package in.wptrafficanalyzer.multipleproximitymapv2; import android.app.Dialog; import android.app.PendingIntent; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.Color; import android.location.LocationManager; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.widget.Toast; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.GoogleMap.OnMapClickListener; import com.google.android.gms.maps.GoogleMap.OnMapLongClickListener; import com.google.android.gms.maps.SupportMapFragment; import com.google.android.gms.maps.model.CircleOptions; import com.google.android.gms.maps.model.LatLng; import com.google.android.gms.maps.model.MarkerOptions; public class MainActivity extends FragmentActivity { GoogleMap googleMap; LocationManager locationManager; PendingIntent pendingIntent; SharedPreferences sharedPreferences; int locationCount = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Getting Google Play availability status int status = GooglePlayServicesUtil .isGooglePlayServicesAvailable(getBaseContext()); // Showing status if (status != ConnectionResult.SUCCESS) { // Google Play Services are // not available int requestCode = 10; Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode); dialog.show(); } else { // Google Play Services are available // Getting reference to the SupportMapFragment of activity_main.xml SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager() .findFragmentById(R.id.map); // Getting GoogleMap object from the fragment googleMap = fm.getMap(); // Enabling MyLocation Layer of Google Map googleMap.setMyLocationEnabled(true); // Getting LocationManager object from System Service // LOCATION_SERVICE locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); // Opening the sharedPreferences object sharedPreferences = getSharedPreferences("location", 0); // Getting number of locations already stored locationCount = sharedPreferences.getInt("locationCount", 0); // Getting stored zoom level if exists else return 0 String zoom = sharedPreferences.getString("zoom", "0"); // If locations are already saved if (locationCount != 0) { String lat = ""; String lng = ""; // Iterating through all the locations stored for (int i = 0; i < locationCount; i++) { // Getting the latitude of the i-th location lat = sharedPreferences.getString("lat" + i, "0"); // Getting the longitude of the i-th location lng = sharedPreferences.getString("lng" + i, "0"); // Drawing marker on the map drawMarker(new LatLng(Double.parseDouble(lat), Double.parseDouble(lng))); // Drawing circle on the map drawCircle(new LatLng(Double.parseDouble(lat), Double.parseDouble(lng))); } // Moving CameraPosition to last clicked position googleMap.moveCamera(CameraUpdateFactory.newLatLng(new LatLng( Double.parseDouble(lat), Double.parseDouble(lng)))); // Setting the zoom level in the map on last position is clicked googleMap.animateCamera(CameraUpdateFactory.zoomTo(Float .parseFloat(zoom))); } googleMap.setOnMapClickListener(new OnMapClickListener() { public void onMapClick(LatLng point) { // Incrementing location count locationCount++; // Drawing marker on the map drawMarker(point); // Drawing circle on the map drawCircle(point); // This intent will call the activity ProximityActivity Intent proximityIntent = new Intent( "in.wptrafficanalyzer.activity.proximity"); // Passing latitude to the PendingActivity proximityIntent.putExtra("lat", point.latitude); // Passing longitude to the PendingActivity proximityIntent.putExtra("lng", point.longitude); // Creating a pending intent which will be invoked by // LocationManager when the specified region is // entered or exited pendingIntent = PendingIntent.getActivity(getBaseContext(), 0, proximityIntent, Intent.FLAG_ACTIVITY_NEW_TASK); // Setting proximity alert // The pending intent will be invoked when the device enters // or exits the region 20 meters // away from the marked point // The -1 indicates that, the monitor will not be expired locationManager.addProximityAlert(point.latitude, point.longitude, 20, -1, pendingIntent); /** * Opening the editor object to write data to * sharedPreferences */ SharedPreferences.Editor editor = sharedPreferences.edit(); // Storing the latitude for the i-th location editor.putString( "lat" + Integer.toString((locationCount - 1)), Double.toString(point.latitude)); // Storing the longitude for the i-th location editor.putString( "lng" + Integer.toString((locationCount - 1)), Double.toString(point.longitude)); // Storing the count of locations or marker count editor.putInt("locationCount", locationCount); /** Storing the zoom level to the shared preferences */ editor.putString("zoom", Float.toString(googleMap.getCameraPosition().zoom)); /** Saving the values stored in the shared preferences */ editor.commit(); Toast.makeText(getBaseContext(), "Proximity Alert is added", Toast.LENGTH_SHORT) .show(); } }); googleMap.setOnMapLongClickListener(new OnMapLongClickListener() { public void onMapLongClick(LatLng point) { Intent proximityIntent = new Intent( "in.wptrafficanalyzer.activity.proximity"); pendingIntent = PendingIntent.getActivity(getBaseContext(), 0, proximityIntent, Intent.FLAG_ACTIVITY_NEW_TASK); // Removing the proximity alert locationManager.removeProximityAlert(pendingIntent); // Removing the marker and circle from the Google Map googleMap.clear(); // Opening the editor object to delete data from // sharedPreferences SharedPreferences.Editor editor = sharedPreferences.edit(); // Clearing the editor editor.clear(); // Committing the changes editor.commit(); Toast.makeText(getBaseContext(), "Proximity Alert is removed", Toast.LENGTH_LONG) .show(); } }); } } private void drawCircle(LatLng point) { // Instantiating CircleOptions to draw a circle around the marker CircleOptions circleOptions = new CircleOptions(); // Specifying the center of the circle circleOptions.center(point); // Radius of the circle circleOptions.radius(20); // Border color of the circle circleOptions.strokeColor(Color.BLACK); // Fill color of the circle circleOptions.fillColor(0x30ff0000); // Border width of the circle circleOptions.strokeWidth(2); // Adding the circle to the GoogleMap googleMap.addCircle(circleOptions); } private void drawMarker(LatLng point) { // Creating an instance of MarkerOptions MarkerOptions markerOptions = new MarkerOptions(); // Setting latitude and longitude for the marker markerOptions.position(point); // Adding InfoWindow title markerOptions.title("Location Coordinates"); // Adding InfoWindow contents markerOptions.snippet(Double.toString(point.latitude) + "," + Double.toString(point.longitude)); // Adding marker on the Google Map googleMap.addMarker(markerOptions); } } </code></pre> <hr> <p>// activity_main </p> <pre><code><fragment android:id="@+id/map" android:layout_width="fill_parent" android:layout_height="fill_parent" class="com.google.android.gms.maps.SupportMapFragment" /> </code></pre> <p></p> <hr> <p>//Manifiest </p> <pre><code><uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <permission android:name="in.wptrafficanalyzer.multipleproximitymapv2.permission.MAPS_RECEIVE" android:protectionLevel="signature" /> <uses-permission android:name="in.wptrafficanalyzer.multipleproximitymapv2.permission.MAPS_RECEIVE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-feature android:glEsVersion="0x00020000" android:required="true" /> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="in.wptrafficanalyzer.multipleproximitymapv2.MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".ProximityActivity" android:label="@string/app_name" > <intent-filter> <action android:name="in.wptrafficanalyzer.activity.proximity" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> <activity android:name=".NotificationView" android:label="@string/app_name" > <intent-filter> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity> <meta-data android:name="com.google.android.maps.v2.API_KEY" android:value="AIzaSyD2fSGTakDlROXxr2IJeDH6f31b7BSc0F8" /> </application> </code></pre> <p></p>

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