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POAndroid locationManager Null Pointer Exception? (how to pass the context?)
 

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  1. POAndroid locationManager Null Pointer Exception? (how to pass the context?)
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    <p>I have a problem here and I cant get it to work... I want to get the latest gps positions but all i get is an null pointer exception. It works with the first class GPSActivity but not with the 2nd SmsReceiver.</p> <p>I read that this is maybe because I have to pass the Context to the 2nd class but I dont know how... please help!</p> <p>Here comes the code:</p> <p><code>GPSActivity.class</code>:</p> <pre><code>import android.app.Activity; import android.content.Context; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.os.Bundle; import android.view.View; import android.widget.Toast; public class GPSActivity extends Activity { long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; // in Meters long MINIMUM_TIME_BETWEEN_UPDATES = 10000; // in Milliseconds LocationManager locationManager; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.getAllProviders(); locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, MINIMUM_TIME_BETWEEN_UPDATES, MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, new MyLocationListener()); } public void showCurrentLocation() { Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (location != null) { String message = String.format( "Current Location \n Longitude: %1$s \n Latitude: %2$s", location.getLongitude(), location.getLatitude()); Toast.makeText(GPSActivity.this, message, Toast.LENGTH_LONG).show(); } } } </code></pre> <p>(I stripped the code a bit)</p> <p>Now, I can call showCurrentLocation and it showes me the long and lat values.</p> <p>How can I do this here:</p> <p><code>SmsReceive.class</code> (when a sms is received, send the gps coordinates)</p> <pre><code>import ... public class SmsReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { GPSActivity myGPS; myGPS = new GPSActivity(); //---get the SMS message passed in--- Bundle bundle = intent.getExtras(); SmsMessage[] msgs = null; if (bundle != null) { //HERE I GET THE NULL POINTER EXCEPTION Location loc = myGPS.locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); double varLong = loc.getLongitude(); double varLat = loc.getLatitude(); String locationData = "LONG: " + varLong+ " LAT: " + varLat; Toast.makeText(context, locationData, Toast.LENGTH_SHORT).show(); } } } </code></pre> <p>thanks!</p>
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