LocationClient getLastLocation() returning null

android, gps, java, location

Solution

`mLocationClient.getLastLocation();` might return null if you don't have any last location saved by the device. If you read its documentation, it says;

`It returns the best most recent location currently available. If a location is not available, which should happen very rarely, null will be returned`

Also inside the `onLocationChanged` method you might want to set the Location to the latest location, when your location gets changed.

@Override
public void onLocationChanged(final Location location) {
      mCurrentLocation = location;
}

Problem

I'm new to Android programming and wanted to start by creating a very basic app that displays the latitude and longitude of the current location on screen. I'm developing for my Samsung Galaxy S3 and read that you need to kickstart the phone to return the GPS. I've tried doing this in the `onConnected()` method with the `requestLocationUpdates()` method call on the LocationManager. However I find that the LocationClient is still returning a `null` location. Can anyone tell me what I'm doing wrong? Here's my MainActivity: ``` import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.view.Menu; import android.widget.TextView; import android.widget.Toast; import com.google.android.gms.common.ConnectionResult; import com.google.android.gms.common.GooglePlayServicesClient; import com.google.android.gms.location.LocationClient; public class MainActivity extends FragmentActivity implements GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListener { private LocationClient mLocationClient; private Location mCurrentLocation; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mLocationClient = new LocationClient(this, this, this); } @Override protected void onStart() { super.onStart(); mLocationClient.connect(); } @Override protected void onStop() { mLocationClient.disconnect(); super.onStop(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public void onConnectionFailed(ConnectionResult arg0) { // TODO Auto-generated method stub } @Override public void onConnected(Bundle arg0) { Toast.makeText(this, "Connected", Toast.LENGTH_SHORT).show(); LocationManager manager = (LocationManager) this .getSystemService(Context.LOCATION_SERVICE); manager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, new LocationListener() { @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { } @Override public void onProviderDisabled(String provider) { } @Override public void onLocationChanged(final Location location) { } }); mCurrentLocation = mLocationClient.getLastLocation(); TextView latTextView = (TextView) findViewById(R.id.latitude_text); latTextView.setText(Double.toString(mCurrentLocation.getLatitude())); TextView longTextView = (TextView) findViewById(R.id.longitude_text); longTextView.setText(Double.toString(mCurrentLocation.getLongitude())); } @Override public void onDisconnected() { Toast.makeText(this, "Disconnected. Please re-connect.", Toast.LENGTH_SHORT).show(); } } ``` My Android manifest looks like this: ``` <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:name="com.example.willigetwet.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> </application> </manifest> ``` When running the debugger I find that mCurrentLocation is null after the call to `mLocationClient.getLastLocation()`. I'd be very grateful for any help!

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