Пожалуйста, у меня есть этот код, который работал у меня все это время, и он внезапно не работает, он возвращает null pointer exception
в
double lat = (double) (lastKnownLocation.getLatitude());.
Я установил все необходимые разрешения в файле манифеста, но, похоже, он не работает снова. Я думаю, что теперь проблема с использованием поставщика GPS.
latituteField = (TextView) findViewById(R.id.TextViewLatitudeValue);
longitudeField = (TextView) findViewById(R.id.TextViewLongitudeValue);
SpeedField = (TextView) findViewById(R.id.textViewSpeedValue);
AltitudeField = (TextView) findViewById(R.id.textViewAltitudeValue);
AddressLabel=(TextView)findViewById(R.id.textViewAddress);
lbllatitude=(TextView)findViewById(R.id.lblLatDMS);
lbllongitude=(TextView)findViewById(R.id.lblLongDMS);
// Get the location manager
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
// GPS_PROVIDER
String locationProvider = LocationManager.GPS_PROVIDER;
Location lastKnownLocation = locationManager.getLastKnownLocation(locationProvider);
LocationManager service = (LocationManager) getSystemService(LOCATION_SERVICE);
boolean enabled = service.isProviderEnabled(LocationManager.GPS_PROVIDER);
// check if enabled and if not send user to the GSP settings
// Better solution would be to display a dialog and suggesting to
// go to the settings
if (!enabled)
{
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
else if (locationProvider!= null)
{
Toast.makeText(this, locationProvider +" has been selected",Toast.LENGTH_SHORT).show();
onLocationChanged(lastKnownLocation);
}
else
{
latituteField.setText("0.00");
longitudeField.setText("0.00");
AltitudeField.setText("0.00");
SpeedField.setText("0.00");
}
}
/* Request updates at startup */
@Override
protected void onResume() {
super.onResume();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 400, 1, this);
}
/* Remove the locationlistener updates when Activity is paused */
@Override
protected void onPause() {
super.onPause();
locationManager.removeUpdates(this);
}
@Override
public void onLocationChanged(Location lastKnownLocation) {
double lat = (double) (lastKnownLocation.getLatitude());
double lng = (double) (lastKnownLocation.getLongitude());
double Alt = (double) (lastKnownLocation.getAltitude());
double Speed = (double) (lastKnownLocation.getSpeed());
latituteField.setText(String.format("%.5f",lat));
longitudeField.setText(String.format("%.5f",lng));
AltitudeField.setText(String.format("%.5f",Alt));
SpeedField.setText(String.format("%.5f",Speed));