How to Create Geofence in an Android? - android-geofence

Question

How to Create Geo fence(Creating and Monitoring Geo fences) on current latitude,longitude.
I am trying multiple example but not create.
Using this code:
public Geofence geofence(float radius, double latitude, double longitude) {
String id = UUID.randomUUID().toString();
return new Geofence.Builder()
.setRequestId(id)
.setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER)
.setCircularRegion(latitude, longitude, radius)
.setExpirationDuration(Geofence.NEVER_EXPIRE)
.build();
}

Answer 1

There's this tutorial from Google, that's very easy to follow:
http://io2015codelabs.appspot.com/codelabs/geofences
There's also a course at Udacity that teaches location services, including geofences:
https://www.udacity.com/course/google-location-services-on-android--ud876-1
Add Google Play Services to Gradle File:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.0.0'
compile 'com.google.android.gms:play-services:7.3.0'
}
Add to Manifest File:
<meta-data
android:name="com.google.android.gms.version"
android:value="#integer/google_play_services_version" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
Add to Activity's XML Layout file:
<Button
android:id="#+id/add_geofences_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:onClick="addGeofencesButtonHandler"
android:text="Add GeoFences" />
Add to Activity's Java File:
public class MainActivity extends Activity
implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
ResultCallback<Status>{
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mAddGeofencesButton = (Button) findViewById(R.id.add_geofences_button);
// Empty list for storing geofences.
mGeofenceList = new ArrayList<Geofence>();
// Get the geofences used. Geofence data is hard coded in this sample.
populateGeofenceList();
// Kick off the request to build GoogleApiClient.
buildGoogleApiClient();
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
public void populateGeofenceList() {
for (Map.Entry<String, LatLng> entry : Constants.LANDMARKS.entrySet()) {
mGeofenceList.add(new Geofence.Builder()
.setRequestId(entry.getKey())
.setCircularRegion(
entry.getValue().latitude,
entry.getValue().longitude,
Constants.GEOFENCE_RADIUS_IN_METERS
)
.setExpirationDuration(Constants.GEOFENCE_EXPIRATION_IN_MILLISECONDS)
.setTransitionTypes(Geofence.GEOFENCE_TRANSITION_ENTER |
Geofence.GEOFENCE_TRANSITION_EXIT)
.build());
}
}
#Override
protected void onStart() {
super.onStart();
if (!mGoogleApiClient.isConnecting() || !mGoogleApiClient.isConnected()) {
mGoogleApiClient.connect();
}
}
#Override
protected void onStop() {
super.onStop();
if (mGoogleApiClient.isConnecting() || mGoogleApiClient.isConnected()) {
mGoogleApiClient.disconnect();
}
}
#Override
public void onConnected(Bundle connectionHint) {
}
#Override
public void onConnectionFailed(ConnectionResult result) {
// Do something with result.getErrorCode());
}
#Override
public void onConnectionSuspended(int cause) {
mGoogleApiClient.connect();
}
public void addGeofencesButtonHandler(View view) {
if (!mGoogleApiClient.isConnected()) {
Toast.makeText(this, "Google API Client not connected!", Toast.LENGTH_SHORT).show();
return;
}
try {
LocationServices.GeofencingApi.addGeofences(
mGoogleApiClient,
getGeofencingRequest(),
getGeofencePendingIntent()
).setResultCallback(this); // Result processed in onResult().
} catch (SecurityException securityException) {
// Catch exception generated if the app does not use ACCESS_FINE_LOCATION permission.
}
}
private GeofencingRequest getGeofencingRequest() {
GeofencingRequest.Builder builder = new GeofencingRequest.Builder();
builder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);
builder.addGeofences(mGeofenceList);
return builder.build();
}
private PendingIntent getGeofencePendingIntent() {
Intent intent = new Intent(this, GeofenceTransitionsIntentService.class);
// We use FLAG_UPDATE_CURRENT so that we get the same pending intent back when calling addgeoFences()
return PendingIntent.getService(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
}
public void onResult(Status status) {
if (status.isSuccess()) {
Toast.makeText(
this,
"Geofences Added",
Toast.LENGTH_SHORT
).show();
} else {
// Get the status code for the error and log it using a user-friendly message.
String errorMessage = GeofenceErrorMessages.getErrorString(this,
status.getStatusCode());
}
}
Create a java file called Constans:
public class Constants {
public static final long GEOFENCE_EXPIRATION_IN_MILLISECONDS = 12 * 60 * 60 * 1000;
public static final float GEOFENCE_RADIUS_IN_METERS = 20;
public static final HashMap<String, LatLng> LANDMARKS = new HashMap<String, LatLng>();
static {
// San Francisco International Airport.
LANDMARKS.put("Moscone South", new LatLng(37.783888,-122.4009012));
// Googleplex.
LANDMARKS.put("Japantown", new LatLng(37.785281,-122.4296384));
// Test
LANDMARKS.put("SFO", new LatLng(37.621313,-122.378955));
}
}
Create a java file called GeofenceTransitionsIntentService:
public class GeofenceTransitionsIntentService extends IntentService {
protected static final String TAG = "GeofenceTransitionsIS";
public GeofenceTransitionsIntentService() {
super(TAG); // use TAG to name the IntentService worker thread
}
#Override
protected void onHandleIntent(Intent intent) {
GeofencingEvent event = GeofencingEvent.fromIntent(intent);
if (event.hasError()) {
Log.e(TAG, "GeofencingEvent Error: " + event.getErrorCode());
return;
}
}
String description = getGeofenceTransitionDetails(event);
sendNotification(description);
}
private static String getGeofenceTransitionDetails(GeofencingEvent event) {
String transitionString =
GeofenceStatusCodes.getStatusCodeString(event.getGeofenceTransition());
List triggeringIDs = new ArrayList();
for (Geofence geofence : event.getTriggeringGeofences()) {
triggeringIDs.add(geofence.getRequestId());
}
return String.format("%s: %s", transitionString, TextUtils.join(", ", triggeringIDs));
}
private void sendNotification(String notificationDetails) {
// Create an explicit content Intent that starts MainActivity.
Intent notificationIntent = new Intent(getApplicationContext(), MainActivity.class);
// Get a PendingIntent containing the entire back stack.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
stackBuilder.addParentStack(MainActivity.class).addNextIntent(notificationIntent);
PendingIntent notificationPendingIntent =
stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT);
// Get a notification builder that's compatible with platform versions >= 4
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
// Define the notification settings.
builder.setColor(Color.RED)
.setContentTitle(notificationDetails)
.setContentText("Click notification to return to App")
.setContentIntent(notificationPendingIntent)
.setAutoCancel(true);
// Fire and notify the built Notification.
NotificationManager notificationManager =
(NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(0, builder.build());
}
You should probably stick to their tutorial instead of copying and pasting the code to your project :D
Source

Answer 2

I am doing it in a Service
GeolocationService
public class GeolocationService extends Service implements LocationListener,
GoogleApiClient.OnConnectionFailedListener, GoogleApiClient.ConnectionCallbacks {
private Context mContext;
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
// private Location mLastLocation;
private PendingIntent mGeofencePendingIntent;
private String mLastUpdateTime;
public static boolean isGeoFenceAdded = false;
private boolean mUpdateGeoFence = false;
private boolean mRemoveAllGeoFence = false;
private static final long TIME_OUT = 100;
#Override
public void onCreate() {
super.onCreate();
mContext = GeolocationService.this;
buildGoogleApiClient();
createLocationRequest();
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(mContext)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
/// FIXME: 2/15/2017 connect should be handled through onStart and onStop of Activity
mGoogleApiClient.connect();
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(5000);//set the interval in which you want to get locations
mLocationRequest.setFastestInterval(2500);//if a location is available sooner you can get it (i.e. another app is using the location services)
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (intent != null) {
if (intent.getAction() != null) {
if (intent.getAction().equals(Constants.ACTION_UPDATE_GEOFENCE)) {
//// FIXME: 3/21/2017 you can also receive triggered location here..
mUpdateGeoFence = true;
isGeoFenceAdded = false;
mRemoveAllGeoFence = false;
} else if (intent.getAction().equals(Constants.ACTION_ADD_GEOFENCE)) {
mUpdateGeoFence = false;
isGeoFenceAdded = false;
mRemoveAllGeoFence = false;
} else if (intent.getAction().equals(Constants.ACTION_REMOVE_ALL_GEOFENCE)) {
mRemoveAllGeoFence = true;
isGeoFenceAdded = true;
mUpdateGeoFence = false;
}
}
}
//try this for null as http://stackoverflow.com/a/25096022/3496570
///return START_REDELIVER_INTENT;
return super.onStartCommand(intent, flags, startId);
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onConnected(#Nullable Bundle bundle) {
startLocationUpdates(mContext);
}
#Override
public void onConnectionSuspended(int i) {
switch (i) {
case CAUSE_SERVICE_DISCONNECTED:
/*if (onLocationUpdateListener != null)
onLocationUpdateListener.onError(
Constants.ErrorType.SERVICE_DISCONNECTED);*/
break;
case CAUSE_NETWORK_LOST:
/*if (onLocationUpdateListener != null)
onLocationUpdateListener.onError(
Constants.ErrorType.NETWORK_LOST);*/
break;
}
//// FIXME: 3/2/2017 check is it right to check for re Connecting..
//--- http://stackoverflow.com/a/27350444/3496570
///mGoogleApiClient.connect();
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
/*if (onLocationUpdateListener != null)
onLocationUpdateListener.onError(
Constants.ErrorType.CONNECTION_FAIL);*/
//// FIXME: 3/3/2017 call a transparent activity and call startResolutionForresult from their and return result to service using action
if (connectionResult.hasResolution()) {
/*try {
// !!!
connectionResult.startResolutionForResult(this, REQUEST_CODE_RESOLVE_ERR);
} catch (IntentSender.SendIntentException e) {
e.printStackTrace();
}*/
} else {
/*GoogleApiAvailability.getInstance().getErrorDialog(mContext, connectionResult.getErrorCode(), 0).show();
return;*/
}
}
#Override
public void onLocationChanged(final Location currentLocation) {
setupGeoFencePoints(currentLocation);
/*if (onLocationUpdateListener != null && mLocation != null) {
onLocationUpdateListener.onLocationChange(mLocation);
}*/
}
private void setupGeoFencePoints(final Location currentLocation) {
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
// mLastLocation = currentLocation;
if (currentLocation != null && isGeoFenceAdded == false)
{
if (mUpdateGeoFence) {
if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
LocationServices.GeofencingApi.removeGeofences(mGoogleApiClient
, getGeofencePendingIntent()).setResultCallback(new ResultCallback<Status>() {
#Override
public void onResult(#NonNull Status status) {
if (status.isSuccess()) {
//if old geoFence's remove successfully then add new ones.
addGeoFences(currentLocation);
}
}
});
}
} else {
addGeoFences(currentLocation);
}
}
else if(isGeoFenceAdded && mRemoveAllGeoFence ){
if (mGoogleApiClient != null && mGoogleApiClient.isConnected())
{
LocationServices.GeofencingApi.removeGeofences(mGoogleApiClient
, mGeofencePendingIntent).setResultCallback(new ResultCallback<Status>() {
#Override
public void onResult(#NonNull Status status) {
if (status.isSuccess()) {
mRemoveAllGeoFence = false;
isGeoFenceAdded = false;
//if old geoFence's remove successfully then do nothing.
stopLocationUpdate();
if (mGoogleApiClient != null && mGoogleApiClient.isConnected())
mGoogleApiClient.disconnect();
}
}
});
}
}
}
#Override
public void onDestroy() {
super.onDestroy();
stopLocationUpdate();
if (mGoogleApiClient != null && mGoogleApiClient.isConnected())
mGoogleApiClient.disconnect();
}
private void startLocationUpdates(final Context mContext) {
if (ActivityCompat.checkSelfPermission(mContext,
Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED
&& ActivityCompat.checkSelfPermission(mContext,
Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
return;
}
// mLastLocation = FusedLocationApi.getLastLocation(mGoogleApiClient);
PendingResult<Status> pendingResult = FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
pendingResult.setResultCallback(new ResultCallback<Status>() {
#Override
public void onResult(#NonNull Status status) {
//update it's code too.
if (status.isSuccess()) {
Toast.makeText(mContext, "location Update Started",
Toast.LENGTH_SHORT).show();
} else if (status.hasResolution()) {
Toast.makeText(mContext, "Open intent to resolve",
Toast.LENGTH_SHORT).show();
}
}
});
}
private void stopLocationUpdate() {
//three types of constructor ..
if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
}
}
public void addGeoFences(Location currentLocation) {
if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) {
try {
if (getGeofencingRequest(currentLocation) != null) {
LocationServices.GeofencingApi.addGeofences(
mGoogleApiClient,
// The GeofenceRequest object.
getGeofencingRequest(currentLocation),
// A pending intent that that is reused when calling removeGeofences(). This
// pending intent is used to generate an intent when a matched geofence
// transition is observed.
getGeofencePendingIntent()
//).await(TimeOut,TimeUnit.Miilisecponds);
).setResultCallback(new ResultCallback<Status>() {
#Override
public void onResult(#NonNull Status status) {
if (status.isSuccess()) {
Toast.makeText(mContext, "Geo Fence Added", Toast.LENGTH_SHORT).show();
isGeoFenceAdded = true;
mRemoveAllGeoFence = false;
mUpdateGeoFence = false;
/// FIXME: 3/2/2017 I didn't have to draw it.
///broadcastDrawGeoFenceOnMap();
} else {
String errorMessage = getErrorString(mContext, status.getStatusCode());
Toast.makeText(mContext, "Status Failed", Toast.LENGTH_SHORT).show();
}
}
}); // Result processed in onResult().
}
} catch (SecurityException securityException) {
securityException.printStackTrace();
// Catch exception generated if the app does not use ACCESS_FINE_LOCATION permission.
//logSecurityException(securityException);
}
}
}
private PendingIntent getGeofencePendingIntent() {
if (mGeofencePendingIntent != null) {
return mGeofencePendingIntent;
}
// Reuse the PendingIntent if we already have it.
/// FIXME: 2/9/2017 Update the below class with a receiever..
Intent intent = new Intent(mContext, GeofenceReceiver.class);///GeofenceTransitionsIntentService.class);
// We use FLAG_UPDATE_CURRENT so that we get the same pending intent back when calling
// addGeofences() and removeGeofences().
/// FIXME: 3/1/2017 It must be reciever not IntentService
mGeofencePendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
return mGeofencePendingIntent;
}
private GeofencingRequest getGeofencingRequest(Location mCurrentLocation) {
/// FIXME: 2/13/2017 mLastLocation can be null because it will take time for the first time.
/// this request should be called after first mLastLocation has been fetched..
GeofencingRequest geofencingRequest = null;
if (mCurrentLocation != null) {
List<SimpleGeofence> simpleFenceList = SimpleGeofenceStore
.getInstance().getLatestGeoFences(mCurrentLocation);
simpleFenceList.add(new SimpleGeofence("currentLocation",
mCurrentLocation.getLatitude(), mCurrentLocation.getLongitude(),
100f, GEOFENCE_EXPIRATION_IN_MILLISECONDS,
Geofence.GEOFENCE_TRANSITION_EXIT));
ListSharedPref.saveAnyTypeOfList(ListSharedPref.GEO_FENCE_LIST_KEY, simpleFenceList);
GeofencingRequest.Builder geofencingRequestBuilder = new GeofencingRequest.Builder();
geofencingRequestBuilder.setInitialTrigger(GeofencingRequest.INITIAL_TRIGGER_ENTER);
for (SimpleGeofence simpleGeofence : simpleFenceList)
geofencingRequestBuilder.addGeofence(simpleGeofence.toGeofence());
geofencingRequest = geofencingRequestBuilder.build();
}
// Return a GeofencingRequest.
return geofencingRequest;
}
}
GeofenceReceiver
public class GeofenceReceiver extends IntentService {
public static final int NOTIFICATION_ID = 1;
public GeofenceReceiver() {
super("GeofenceReceiver");
}
#Override
protected void onHandleIntent(Intent intent) {
GeofencingEvent geoEvent = GeofencingEvent.fromIntent(intent);
Location triggredLocation = geoEvent.getTriggeringLocation();
if (geoEvent.hasError()) {
Log.d(HomeActivity.TAG, "Error GeofenceReceiver.onHandleIntent");
} else {
Log.d(HomeActivity.TAG, "GeofenceReceiver : Transition -> "
+ geoEvent.getGeofenceTransition());
int transitionType = geoEvent.getGeofenceTransition();
if (transitionType == Geofence.GEOFENCE_TRANSITION_ENTER
|| transitionType == Geofence.GEOFENCE_TRANSITION_DWELL
|| transitionType == Geofence.GEOFENCE_TRANSITION_EXIT) {
List<Geofence> triggerList = geoEvent.getTriggeringGeofences();
//if(triggerList.g)
Type listType = new TypeToken<ArrayList<SimpleGeofence>>(){}.getType();
List<SimpleGeofence> geoFenceList = GenericPref.readAnyTypeOfList(GenericPref.GEO_FENCE_LIST_KEY,listType);
for (Geofence geofence : triggerList)
{
/*SimpleGeofence sg = SimpleGeofenceStore.getInstance()
.getSimpleGeofences().get(geofence.getRequestId());*/
SimpleGeofence sg = null;
for(SimpleGeofence simpleGeofence : geoFenceList){
if(simpleGeofence.getId().equalsIgnoreCase(geofence.getRequestId())){
sg = simpleGeofence;
break;
}
}
String transitionName = "";
switch (transitionType) {
case Geofence.GEOFENCE_TRANSITION_DWELL:
transitionName = "dwell";
break;
case Geofence.GEOFENCE_TRANSITION_ENTER:
transitionName = "enter";
String date = DateFormat.format("yyyy-MM-dd hh:mm:ss",
new Date()).toString();
EventDataSource eds = new EventDataSource(
getApplicationContext());
eds.create(transitionName, date, geofence.getRequestId());
eds.close();
GeofenceNotification geofenceNotification = new GeofenceNotification(
this);
if(sg != null){
geofenceNotification
.displayNotification(sg, transitionType);
}
break;
case Geofence.GEOFENCE_TRANSITION_EXIT:
transitionName = "exit";
broadcastUpdateGeoFences();
//update your List
// Unregister all geoFences and reRegister it again
break;
}
}
}
}
}
public void broadcastUpdateGeoFences() {
//// FIXME: 3/2/2017 what if app is closed
HomeActivity.geofencesAlreadyRegistered = false;
MainActivity.isGeoFenceAdded = false;
Intent intent = new Intent(Constants.RECEIVER_GEOFENCE);
intent.putExtra("done", 1);
sendBroadcast(intent);
}
}