I have an app that needs the location of the user, and I am new in implementing location service of Google.
I made a separate java class to handle things related to getting location, and then using the location information in a activity just to show the location(so far), but I get the default value of 0 for latitude and longitude in my activity.
Here's the java class implementing the location related stuff, following google guideline:
import android.content.Context;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;
public class CommentLocation implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
private double mLatitude;
private double mLongitude;
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
public CommentLocation(Context context){
buildGoogleApiClient(context);
}
public double getCommentLongitude() {
return mLongitude;
}
public double getCommentLatitude() {
return mLatitude;
}
protected synchronized void buildGoogleApiClient(Context context) {
mGoogleApiClient = new GoogleApiClient.Builder(context)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
#Override
public void onConnected(Bundle connectionHint) {
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
mLatitude = mLastLocation.getLatitude();
mLongitude = mLastLocation.getLongitude();
}
else{
Log.v(CommentLocation.class.getName(), "LOCATION WAS NOT RECEIVED");
}
Log.v(CommentLocation.class.getName(), "CONNECTION TO GET LOCATION IS SUCCESSFUL");
}
#Override
public void onConnectionSuspended(int i) {
//TODO
Log.v(CommentLocation.class.getName(), "CONNECTION TO GET LOCATION IS SUSPENDED");
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
//TODO
Log.v(CommentLocation.class.getName(), "CONNECTION TO GET LOCATION IS FAILED");
}
}
And here is the caller of this location class (the fragment PostCommentFragment)
public class PostCommentFragment extends Fragment {
private TextView mLatitudeText;
private TextView mLongtitudeText;
private CommentDatabase database;
private CommentLocation location;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
database = new CommentDatabase(getActivity());
location = new CommentLocation(getActivity());
setHasOptionsMenu(true);
}
#TargetApi(11) //for setDisplayHomeAsUpEnabled function
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_post_comment, container, false);
//to enable the app icon to work as a button and get the caret to appear in fragment's view
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB){
if(NavUtils.getParentActivityName(getActivity()) != null) {
getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
mLatitudeText = (TextView) v.findViewById(R.id.latitude_text);
mLongtitudeText = (TextView) v.findViewById(R.id.longitude_text);
mLatitudeText.setText(String.valueOf(location.getCommentLatitude()));
mLongtitudeText.setText(String.valueOf(location.getCommentLongitude()));
return v;
}
What am I doing wrong here?
I also added this line compile 'com.google.android.gms:play-services:7.8.0'
to build.gradle(Module:app)->under dependencies, and asked for permission in Manifest. Thanks!
Issue 1:
You're not calling connect() on mGoogleApiClient.
You need to call connect in order for onConnected() to be invoked:
public CommentLocation(Context context){
buildGoogleApiClient(context);
mGoogleApiClient.connect(); //added
}
Issue 2:
It looks like you're only using getLastLocation(). This may work for your needs, but if you need a location, this method is not guaranteed to give one. The getLastLocation() method can and will return null. The main problem is that it doesn't prompt a request to the OS for a new location lock, instead it just checks if there was a last known location from some other app's location request. If no other app had recently made a location request, then you get a null location returned to you.
The only way to guarantee that you actually get a location is to request one, and this is done with a call to requestLocationUpdates().
Issue 3:
Given that it takes time to connect to the Google Api Client, the timing may be off, and even if you get a location from getLastLocation(), you may have already requested it from your Fragment.
To get around this issue, you could use a BroadcastReceiver to send the location from the CommentLocation class to the Fragment.
Note that in general keeping the location functionality encapsulated is a better approach, but it's more work to implement. You might want to go with a more simple design, where the location functionality is within the Activity that is associated with this Fragment. Then you could just call into the Fragment when a location is available.
Sample Activity code with a location listener:
public class MainActivity extends Activity implements
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buildGoogleApiClient();
mGoogleApiClient.connect();
}
#Override
protected void onPause(){
super.onPause();
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
protected synchronized void buildGoogleApiClient() {
Toast.makeText(this,"buildGoogleApiClient",Toast.LENGTH_SHORT).show();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
#Override
public void onConnected(Bundle bundle) {
Toast.makeText(this,"onConnected",Toast.LENGTH_SHORT).show();
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10);
mLocationRequest.setFastestInterval(10);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
//mLocationRequest.setPriority(LocationRequest.PRIORITY_LOW_POWER);
//mLocationRequest.setSmallestDisplacement(0.1F);
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
#Override
public void onConnectionSuspended(int i) {
Toast.makeText(this,"onConnectionSuspended",Toast.LENGTH_SHORT).show();
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Toast.makeText(this,"onConnectionFailed",Toast.LENGTH_SHORT).show();
}
#Override
public void onLocationChanged(Location location) {
Log.d("locationtesting", "accuracy: " + location.getAccuracy() + " lat: " + location.getLatitude() + " lon: " + location.getLongitude());
Toast.makeText(this,"Location Changed",Toast.LENGTH_SHORT).show();
}
}
Related
I want to get current location of user by using play service api. But always its calling onConnectionFailed() method. I have added google-services.json file with SHA-1 key. But its showing the Toast message written in onConnectionFailed() method. How can i fix it?
Here is my code -
public class HomeActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
//setup GoogleApiClient
setupGoogleApiClient();
}
}
}
//setup GoogleApiClient object
private void setupGoogleApiClient() {
// Create an instance of GoogleAPIClient.
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
mGoogleApiClient.connect();
}
protected void onStart() {
super.onStart();
}
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
#Override
public void onConnected(#Nullable Bundle bundle) {
Toast.makeText(this, "Connected with google play service", Toast.LENGTH_LONG).show();
}
#Override
public void onConnectionSuspended(int i) {
Toast.makeText(this, "Connection suspended with google play service", Toast.LENGTH_LONG).show();
}
#Override
public void onConnectionFailed(#NonNull ConnectionResult connectionResult) {
Toast.makeText(this, "Failed to connect with google play service", Toast.LENGTH_LONG).show();
}
}
Try changing play service version in your gradle file,
if you are using
compile 'com.google.android.gms:play-services:10.0.1'
try with
compile 'com.google.android.gms:play-services:8.x.x'
and other combination.
Note:- replace "x" with suitable values
I am currently making an application where I need to get the user's location when a button is clicked. I am using this sample and it works great as a sample application. My question is, how would I implement it into my application button's onClick event? I don't need it to refresh often, I just need it so that when the user clicks the button, it gets the user's latitude and longitude and saves them to two variables. What would be the best way to do this? I didn't post my own code because all I have is a button with an onClick event.
Follow these steps to get the location on button click:
Implement LocationListener in your activity like:
public class MainActivity Extends AppCompactActivity implements LocationListener
Then create an Instance For LocationManager, longitude, and latitude as below:
LocationManager locationManager; // create global outside all methods
Double currentLattitude, currentLongitude;
Set click event on your button as below:
btnLocation.setOnClickListner( new View.onClickListner
{
#Override
public void onClick(View v)
{
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
}
});
Now implement method for LocationListener as below:
#Override
public void onLocationChanged(Location location) {
currentLattitude = location.getLatitude();
currentLongitude = location.getLongitude());
}
#Override
public void onProviderDisabled(String provider) {
Log.d("Latitude","disable");
}
#Override
public void onProviderEnabled(String provider) {
Log.d("Latitude","enable");
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {
Log.d("Latitude","status");
}
With this, you can get your location via on click of your button.
Main thing to don't forget is to set permission (in your Manifest) as below:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission. ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
Use fused location API this is the fastest from all others.
public class LocationActivity extends Activity implements
LocationListener,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static final String TAG = "LocationActivity";
private static final long INTERVAL = 1000 * 10;
private static final long FASTEST_INTERVAL = 1000 * 5;
Button btnFusedLocation;
TextView tvLocation;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mCurrentLocation;
String mLastUpdateTime;
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.d(TAG, "onCreate ...............................");
//show error dialog if GoolglePlayServices not available
if (!isGooglePlayServicesAvailable()) {
finish();
}
createLocationRequest();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
setContentView(R.layout.activity_main);
tvLocation = (TextView) findViewById(R.id.tvLocation);
btnFusedLocation = (Button) findViewById(R.id.btnShowLocation);
btnFusedLocation.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
updateUI();
}
});
}
#Override
public void onStart() {
super.onStart();
Log.d(TAG, "onStart fired ..............");
mGoogleApiClient.connect();
}
#Override
public void onStop() {
super.onStop();
Log.d(TAG, "onStop fired ..............");
mGoogleApiClient.disconnect();
Log.d(TAG, "isConnected ...............: " + mGoogleApiClient.isConnected());
}
private boolean isGooglePlayServicesAvailable() {
int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (ConnectionResult.SUCCESS == status) {
return true;
} else {
GooglePlayServicesUtil.getErrorDialog(status, this, 0).show();
return false;
}
}
#Override
public void onConnected(Bundle bundle) {
Log.d(TAG, "onConnected - isConnected ...............: " + mGoogleApiClient.isConnected());
startLocationUpdates();
}
protected void startLocationUpdates() {
PendingResult<Status> pendingResult = LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
Log.d(TAG, "Location update started ..............: ");
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.d(TAG, "Connection failed: " + connectionResult.toString());
}
#Override
public void onLocationChanged(Location location) {
Log.d(TAG, "Firing onLocationChanged..............................................");
mCurrentLocation = location;
mLastUpdateTime = DateFormat.getTimeInstance().format(new Date());
updateUI();
}
private void updateUI() {
Log.d(TAG, "UI update initiated .............");
if (null != mCurrentLocation) {
String lat = String.valueOf(mCurrentLocation.getLatitude());
String lng = String.valueOf(mCurrentLocation.getLongitude());
tvLocation.setText("At Time: " + mLastUpdateTime + "\n" +
"Latitude: " + lat + "\n" +
"Longitude: " + lng + "\n" +
"Accuracy: " + mCurrentLocation.getAccuracy() + "\n" +
"Provider: " + mCurrentLocation.getProvider());
} else {
Log.d(TAG, "location is null ...............");
}
}
#Override
protected void onPause() {
super.onPause();
stopLocationUpdates();
}
protected void stopLocationUpdates() {
LocationServices.FusedLocationApi.removeLocationUpdates(
mGoogleApiClient, this);
Log.d(TAG, "Location update stopped .......................");
}
#Override
public void onResume() {
super.onResume();
if (mGoogleApiClient.isConnected()) {
startLocationUpdates();
Log.d(TAG, "Location update resumed .....................");
}
}
}
LocationListener provides call back for location change through onLocationChanged.
GoogleApiClient.ConnectionCallbacks provides call back for GoogleApiClient onConnected.
GoogleApiClient.OnConnectionFailedListener provides call back for GoogleApiClient onConnectionFailed.
Source: http://javapapers.com/android/android-location-fused-provider/
I want google maps to show the location of the user. I tried this code, but it did not work on Android 6.
private GoogleMap map;
LocationManager lm;
LocationListener ll;
Location l;
LatLng pos;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.start_layout);
lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
ll = new LocationListener() {
#Override
public void onLocationChanged(Location location) {
l = (Location) location;
}
#Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
#Override
public void onProviderEnabled(String provider) {}
#Override
public void onProviderDisabled(String provider) {}
};
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.nMap);
mapFragment.getMapAsync(this);
}
#Override
public void onMapReady(GoogleMap googleMap) {
map = googleMap;
if(ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
lm.requestLocationUpdates(lm.NETWORK_PROVIDER, 0, 0, ll);
}
pos = new LatLng(l.getLatitude(), l.getLongitude());
// Add a marker in Sydney and move the camera
map.setMyLocationEnabled(true);
map.addMarker(new MarkerOptions().position(pos).title("Marker in Sydney"));
map.moveCamera(CameraUpdateFactory.newLatLng(pos));
}
Here are the permissions I've set:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
For using FusedLocationProviderClient with Google Play Services 11 and higher:
see here:
How to get current Location in GoogleMap using FusedLocationProviderClient
For using (now deprecated) FusedLocationProviderApi:
If your project uses Google Play Services 10 or lower, using the FusedLocationProviderApi is the optimal choice.
The FusedLocationProviderApi offers less battery drain than the old open source LocationManager API.
Also, if you're already using Google Play Services for Google Maps, there's no reason not to use it.
Here is a full Activity class that places a Marker at the current location, and also moves the camera to the current position.
It also checks for the Location permission at runtime for Android 6 and later (Marshmallow, Nougat, Oreo).
In order to properly handle the Location permission runtime check that is necessary on Android M/Android 6 and later, you need to ensure that the user has granted your app the Location permission before calling mGoogleMap.setMyLocationEnabled(true) and also before requesting location updates.
public class MapLocationActivity extends AppCompatActivity
implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
GoogleMap mGoogleMap;
SupportMapFragment mapFrag;
LocationRequest mLocationRequest;
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
Marker mCurrLocationMarker;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getSupportActionBar().setTitle("Map Location Activity");
mapFrag = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFrag.getMapAsync(this);
}
#Override
public void onPause() {
super.onPause();
//stop location updates when Activity is no longer active
if (mGoogleApiClient != null) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
#Override
public void onMapReady(GoogleMap googleMap)
{
mGoogleMap=googleMap;
mGoogleMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
//Initialize Google Play Services
if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
//Location Permission already granted
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
} else {
//Request Location Permission
checkLocationPermission();
}
}
else {
buildGoogleApiClient();
mGoogleMap.setMyLocationEnabled(true);
}
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
#Override
public void onConnected(Bundle bundle) {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(1000);
mLocationRequest.setFastestInterval(1000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY);
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
}
#Override
public void onConnectionSuspended(int i) {}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {}
#Override
public void onLocationChanged(Location location)
{
mLastLocation = location;
if (mCurrLocationMarker != null) {
mCurrLocationMarker.remove();
}
//Place current location marker
LatLng latLng = new LatLng(location.getLatitude(), location.getLongitude());
MarkerOptions markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title("Current Position");
markerOptions.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA));
mCurrLocationMarker = mGoogleMap.addMarker(markerOptions);
//move map camera
mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngZoom(latLng,11));
}
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99;
private void checkLocationPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.ACCESS_FINE_LOCATION)) {
// Show an explanation to the user *asynchronously* -- don't block
// this thread waiting for the user's response! After the user
// sees the explanation, try again to request the permission.
new AlertDialog.Builder(this)
.setTitle("Location Permission Needed")
.setMessage("This app needs the Location permission, please accept to use location functionality")
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
//Prompt the user once explanation has been shown
ActivityCompat.requestPermissions(MapLocationActivity.this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
})
.create()
.show();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
MY_PERMISSIONS_REQUEST_LOCATION );
}
}
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// location-related task you need to do.
if (ContextCompat.checkSelfPermission(this,
Manifest.permission.ACCESS_FINE_LOCATION)
== PackageManager.PERMISSION_GRANTED) {
if (mGoogleApiClient == null) {
buildGoogleApiClient();
}
mGoogleMap.setMyLocationEnabled(true);
}
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(this, "permission denied", Toast.LENGTH_LONG).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map"
tools:context=".MapLocationActivity"
android:name="com.google.android.gms.maps.SupportMapFragment"/>
</LinearLayout>
Result:
Show permission explanation if needed using an AlertDialog (this happens if the user denies a permission request, or grants the permission and then later revokes it in the settings):
Prompt the user for Location permission by calling ActivityCompat.requestPermissions():
Move camera to current location and place Marker when the Location permission is granted:
Sorry but that's just much too much overhead (above), short and quick, if you have the MapFragment, you also have to map, just do the following:
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) {
googleMap.setMyLocationEnabled(true)
} else {
// Show rationale and request permission.
}
Code is in Kotlin, hope you don't mind.
have fun
Btw I think this one is a duplicate of: Show Current Location inside Google Map Fragment
Firstly make sure your API Key is valid and add this into your manifest <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
Here's my maps activity.. there might be some redundant information in it since it's from a larger project I created.
import android.content.Intent;
import android.content.IntentSender;
import android.location.Location;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
public class MapsActivity extends FragmentActivity implements
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener {
//These variable are initalized here as they need to be used in more than one methid
private double currentLatitude; //lat of user
private double currentLongitude; //long of user
private double latitudeVillageApartmets= 53.385952001750184;
private double longitudeVillageApartments= -6.599087119102478;
public static final String TAG = MapsActivity.class.getSimpleName();
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
setUpMapIfNeeded();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
// Create the LocationRequest object
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(10 * 1000) // 10 seconds, in milliseconds
.setFastestInterval(1 * 1000); // 1 second, in milliseconds
}
/*These methods all have to do with the map and wht happens if the activity is paused etc*/
//contains lat and lon of another marker
private void setUpMap() {
MarkerOptions marker = new MarkerOptions().position(new LatLng(latitudeVillageApartmets, longitudeVillageApartments)).title("1"); //create marker
mMap.addMarker(marker); // adding marker
}
//contains your lat and lon
private void handleNewLocation(Location location) {
Log.d(TAG, location.toString());
currentLatitude = location.getLatitude();
currentLongitude = location.getLongitude();
LatLng latLng = new LatLng(currentLatitude, currentLongitude);
MarkerOptions options = new MarkerOptions()
.position(latLng)
.title("You are here");
mMap.addMarker(options);
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom((latLng), 11.0F));
}
#Override
protected void onResume() {
super.onResume();
setUpMapIfNeeded();
mGoogleApiClient.connect();
}
#Override
protected void onPause() {
super.onPause();
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
mGoogleApiClient.disconnect();
}
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
#Override
public void onConnected(Bundle bundle) {
Location location = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (location == null) {
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
else {
handleNewLocation(location);
}
}
#Override
public void onConnectionSuspended(int i) {
}
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST);
/*
* Thrown if Google Play services canceled the original
* PendingIntent
*/
} catch (IntentSender.SendIntentException e) {
// Log the error
e.printStackTrace();
}
} else {
/*
* If no resolution is available, display a dialog to the
* user with the error.
*/
Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode());
}
}
#Override
public void onLocationChanged(Location location) {
handleNewLocation(location);
}
}
There's a lot of methods here that are hard to understand but basically all update the map when it's paused etc. There are also connection timeouts etc. Sorry for just posting this, I tried to fix your code but I couldn't figure out what was wrong.
I'm trying to build an app that will show me my location in googleMap and will update my location every few seconds.
here is my code:
public class MapsActivity extends FragmentActivity implements
ConnectionCallbacks, OnConnectionFailedListener, LocationListener, OnMapReadyCallback {
protected static final String TAG = "location-updates-sample";
/**
* The desired interval for location updates. Inexact. Updates may be more or less frequent.
*/
public static final long UPDATE_INTERVAL_IN_MILLISECONDS = 10000;
/**
* The fastest rate for active location updates. Exact. Updates will never be more frequent
* than this value.
*/
public static final long FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS =
UPDATE_INTERVAL_IN_MILLISECONDS / 2;
// Keys for storing activity state in the Bundle.
protected final static String REQUESTING_LOCATION_UPDATES_KEY = "requesting-location-updates-key";
protected final static String LOCATION_KEY = "location-key";
protected GoogleApiClient mGoogleApiClient;
protected LocationRequest mLocationRequest;
protected Location mCurrentLocation;
/**
* Tracks the status of the location updates request. Value changes when the user presses the
* Start Updates and Stop Updates buttons.
*/
protected Boolean mRequestingLocationUpdates;
private GoogleMap mMap;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_maps);
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
mRequestingLocationUpdates = false;
updateValuesFromBundle(savedInstanceState);
buildGoogleApiClient();
}
#Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
LatLng loc = new LatLng(-34,151);
mMap.addMarker(new MarkerOptions().position(loc).title("my location"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(loc));
startUpdates();
}
private void updateValuesFromBundle(Bundle savedInstanceState) {
Log.i(TAG, "Updating values from bundle");
if (savedInstanceState != null) {
if (savedInstanceState.keySet().contains(REQUESTING_LOCATION_UPDATES_KEY)) {
mRequestingLocationUpdates = savedInstanceState.getBoolean(
REQUESTING_LOCATION_UPDATES_KEY);
}
// Update the value of mCurrentLocation from the Bundle and update the UI to show the
// correct latitude and longitude.
if (savedInstanceState.keySet().contains(LOCATION_KEY)) {
// Since LOCATION_KEY was found in the Bundle, we can be sure that mCurrentLocation
// is not null.
mCurrentLocation = savedInstanceState.getParcelable(LOCATION_KEY);
}
updateUI();
}
}
protected synchronized void buildGoogleApiClient() {
Log.i(TAG, "Building GoogleApiClient");
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
createLocationRequest();
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setFastestInterval(FASTEST_UPDATE_INTERVAL_IN_MILLISECONDS);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}
public void startUpdates() { // start updating location
if (!mRequestingLocationUpdates) {
mRequestingLocationUpdates = true;
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
}
public void stopUpdates() { // stop updating location
if (mRequestingLocationUpdates) {
mRequestingLocationUpdates = false;
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
/**
* Updates the latitude, the longitude, and the last location time in the UI.
*/
private void updateUI() {
LatLng loc = new LatLng(mCurrentLocation.getLatitude(), mCurrentLocation.getLongitude());
mMap.addMarker(new MarkerOptions().position(loc).title("my location"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(loc));
}
#Override
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
#Override
public void onResume() {
super.onResume();
if (mGoogleApiClient.isConnected() && mRequestingLocationUpdates) {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
}
#Override
protected void onPause() {
super.onPause();
// Stop location updates to save battery, but don't disconnect the GoogleApiClient object.
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
}
}
#Override
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
/**
* Runs when a GoogleApiClient object successfully connects.
*/
#Override
public void onConnected(Bundle connectionHint) {
Log.i(TAG, "Connected to GoogleApiClient");
if (mCurrentLocation == null) {
mCurrentLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
updateUI();
}
if (mRequestingLocationUpdates) {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
}
#Override
public void onLocationChanged(Location location) {
mCurrentLocation = location;
updateUI();
Toast.makeText(this, getResources().getString(R.string.location_updated_message),
Toast.LENGTH_SHORT).show();
}
#Override
public void onConnectionSuspended(int cause) {
// The connection to Google Play services was lost for some reason. We call connect() to
// attempt to re-establish the connection.
Log.i(TAG, "Connection suspended");
mGoogleApiClient.connect();
}
#Override
public void onConnectionFailed(ConnectionResult result) {
// Refer to the javadoc for ConnectionResult to see what error codes might be returned in
// onConnectionFailed.
Log.i(TAG, "Connection failed: ConnectionResult.getErrorCode() = " + result.getErrorCode());
}
/**
* Stores activity data in the Bundle.
*/
public void onSaveInstanceState(Bundle savedInstanceState) {
savedInstanceState.putBoolean(REQUESTING_LOCATION_UPDATES_KEY, mRequestingLocationUpdates);
savedInstanceState.putParcelable(LOCATION_KEY, mCurrentLocation);
super.onSaveInstanceState(savedInstanceState);
}
}
This code is a part from a sample code from google but i've changed a few things and added the googleMap, its just crashing after onMapReady().
stacktrace:
java.lang.IllegalStateException: GoogleApiClient is not connected yet.
at com.google.android.gms.common.api.internal.zzh.zzb(Unknown Source)
at com.google.android.gms.common.api.internal.zzl.zzb(Unknown Source)
at com.google.android.gms.common.api.internal.zzj.zzb(Unknown Source)
at com.google.android.gms.location.internal.zzd.requestLocationUpdates(Unknown Source)
at com.idanofek.photomap.MapsActivity.startUpdates(MapsActivity.java:135)
at com.idanofek.photomap.MapsActivity.onMapReady(MapsActivity.java:91)
at com.google.android.gms.maps.SupportMapFragment$zza$1.zza(Unknown Source)
at com.google.android.gms.maps.internal.zzo$zza.onTransact(Unknown Source)
at android.os.Binder.transact(Binder.java:387)
at com.google.android.gms.maps.internal.be.a(SourceFile:82)
at com.google.maps.api.android.lib6.e.fb.run(Unknown Source)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Before any operation is executed, the GoogleApiClient must be connect using the 'connect()' method. The client is not considered connected until the onConnected(Bundle) callback has been called.
You should instantiate a client object in your Activity's 'onCreated(Bundle)' method then call connect() on onStart()
You may call startLocationUpdate() from the onConnected() callback
#Override
public void onConnected(Bundle connectionHint) {
...
if (mRequestingLocationUpdates) {
startLocationUpdates();
}
}
protected void startLocationUpdates() {
LocationServices.FusedLocationApi.requestLocationUpdates(
mGoogleApiClient, mLocationRequest, this);
}
Here's a Google Documentation regarding Location Updates: http://developer.android.com/training/location/receive-location-updates.html
I ask, how to create a script, for android, to get a current location with google maps api v2 for android.
Now my scrpt take the location specifying the cordinates.
I post it my java file:
private GoogleMap mMap;
static final LatLng TutorialsPoint = new LatLng(46.493168,11.3306379);
private GoogleMap googleMap;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
try {
if (googleMap == null) {
googleMap = ((MapFragment) getFragmentManager().
findFragmentById(R.id.map)).getMap();
}
googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
Marker TP = googleMap.addMarker(new MarkerOptions().
position(TutorialsPoint).title("TutorialsPoint"));
}
catch (Exception e) {
e.printStackTrace();
}
}
In your onCreate() method, type this:
SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.mapfragment);
mapFragment.getMapAsync(this);
Make your Activity implement LocationListener, onMapReadyCallback and GoogleApiClient.ConnectionCallbacks interfaces. In the methods of that interfaces:
onMapReady (from onMapReadyCallbacks):
public void onMapReady(GoogleMap map) {
//mapa is your GoogleMap variable
mapa=map;
}
Doing this, you make sure your map is ready for working.
In onConnected method (from GoogleApiClient.ConnectionCallbacks interface) you get your location:
#Override
public void onConnected(Bundle bundle) {
Location lkn=LocationServices.FusedLocationApi.getLastLocation(
gApiClient);
if(myLocation==null){
myLocation=new Location("");
}
if(lkn!=null){
myLocation.setLatitude(lkn.getLatitude());
myLocation.setLongitude(lkn.getLongitude());
}
LocationServices.FusedLocationApi.requestLocationUpdates(
gApiClient, mLocationRequest, this);
}
And finally, in onLocationChanged (from LocationListener interface):
#Override
public void onLocationChanged(Location location) {
//myLocation is a class variable, type Location
myLocation.setLatitude(location.getLatitude());
myLocation.setLongitude(location.getLongitude());
}
So, every time the phone have a new location you will receive it in that method.
You will need to implement this two methods too:
//call this method in your onCreate()
protected synchronized void buildGoogleApiClient() {
//gApiClient is a class variable, type GoogleApiClient
gApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(new GoogleApiClient.OnConnectionFailedListener() {
#Override
public void onConnectionFailed(ConnectionResult connectionResult) {
Log.i("Map", "Conection failed");
}
})
.addApi(LocationServices.API)
.build();
gApiClient.connect();
createLocationRequest();
}
protected void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(10000);
mLocationRequest.setFastestInterval(5000);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}