Android位置未从自定义类返回位置

我有自己的位置课程。 我有一个赔率结果，当我使用我的class级搜索GPS位置时，我得到0,0回。

然而，如果我在位置管理器中搜索GPS的getLastKnown函数，我会得到强制值：

public Location getGPSloc(Context c){ isGPSavailable(c); if(gps_enabled) lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 5000, 0, locationListenerGps); timerGPS = new Timer(); timerGPS.schedule(new GetLastLocationGPS(), 45000); return gpsLoc; } 

这是我从函数外部调用的类，我在调用中使用this.getApplicationContext（）。 这是GetLastLocationGPS（）：

  class GetLastLocationGPS extends TimerTask { @Override public void run() { lm.removeUpdates(locationListenerGps); if(gps_enabled){ gpsLoc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);} else{ gpsLoc = null; } } } 

这是听众：

  LocationListener locationListenerGps = new LocationListener() { @Override public void onLocationChanged(Location location) { timerGPS.cancel(); gpsLoc = location; lm.removeUpdates(this); } @Override public void onProviderDisabled(String provider) {} @Override public void onProviderEnabled(String provider) {} @Override public void onStatusChanged(String provider, int status, Bundle extras) {} }; 

当我调用MyLocationInstance.getGPSloc（this.getApplicationContext（））时，返回值始终为0,0。我发送到模拟器的强制值为83 43，如果我在LocationManagerInstance.getLastKnownLocation（LM.GPS）中，则显示;

我不知道为什么这个方法不会获取位置。

是因为理论上定时器在呼叫发生时仍在运行吗？ 这是我能想出答案的唯一方法。 还有其他想法吗？

Answer 1

我不确定你的问题是什么，但这是我的代码，负载和function齐全。

由于此类从Fragment扩展，因此它可以充当片段的父级。 有一个听众，你的class级可以在每个间隔后获得新的位置。

 public class LocationFinderFragment extends Fragment implements GooglePlayServicesClient.ConnectionCallbacks, GooglePlayServicesClient.OnConnectionFailedListener { public interface OnNewLocationFoundListener { public void OnNewLocationFound(Location location); } private static final String TAG = "LocationFinderFragment"; private static final long DEFAULT_UPDATE_LOCATION_INTERVAL = 30 * 1000; // update every 30 seconds private static final long DEFAULT_TERMINATE_SAT_FINDING = 1 * 60 * 60 * 1000; // for 1 hour private OnNewLocationFoundListener listener; // Listener of fragments private OnNewLocationFoundListener listener2; // Listener of MainFragmentHolder private Context context; private LocationClient mLocationClient; private static double lat = 0; private static double lng = 0; private static long lastTime = 0; private LocationListener mLocationListener = new LocationListener() { @Override public void onLocationChanged(Location location) { if(location == null) return; if(lat == location.getLatitude() && lng == location.getLongitude()) { Log.e(TAG, "location not changed."); return; } lat = location.getLatitude(); lng = location.getLongitude(); Log.i(TAG, "Location changed to (" + lat + ", " + lng + ")"); // Ask fragment to get new data and update screen listener.OnNewLocationFound(location); // Display toast notification every minute (instead of every 30 seconds) DateTime time = new DateTime(); long currentTime = time.getMillis(); if(currentTime > lastTime + 1 * 60 * 1000) { listener2.OnNewLocationFound(location); lastTime = currentTime; } } }; @Override public void onAttach(Activity activity) { super.onAttach(activity); try { listener2 = (OnNewLocationFoundListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnNewLocationFoundListener interface."); } Log.i(TAG, "Fragment attached to activity."); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Getting context context = getActivity().getApplicationContext(); // Get location manager mLocationClient = new LocationClient(context, this, this); } @Override public void onResume() { super.onResume(); // Get location if(mLocationClient != null) mLocationClient.connect(); } @Override public void onPause() { super.onPause(); // remove listener in order to save resource if(mLocationClient != null) mLocationClient.disconnect(); } @Override public void onDestroy() { super.onDestroy(); // remove listener in order to save resource if(mLocationClient != null) mLocationClient.disconnect(); } @Override public void onConnected(Bundle bundle) { Log.i(TAG, "Location Connected."); // Get last known location Location lastLocation = mLocationClient.getLastLocation(); mLocationListener.onLocationChanged(lastLocation); if(!SpGodMode.isLocationModeEnabled(context)) { // Create location request LocationRequest locationRequest = LocationRequest.create() .setInterval(DEFAULT_UPDATE_LOCATION_INTERVAL) .setExpirationDuration(DEFAULT_TERMINATE_SAT_FINDING) .setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY); mLocationClient.requestLocationUpdates(locationRequest, mLocationListener); } else { String strLoc = SpGodMode.getLocation(context); if(strLoc != null) { String lat = strLoc.substring(0, strLoc.indexOf(",")); String lng = strLoc.substring(strLoc.indexOf(",") + 1); Location location = new Location(""); try { location.setLatitude(Double.parseDouble(lat)); location.setLongitude(Double.parseDouble(lng)); mLocationListener.onLocationChanged(location); } catch (NumberFormatException e) { Log.e(TAG, "Wrong lat/lng for parsing as Double."); Toast.makeText(context, "Wrong lat/lng", Toast.LENGTH_SHORT).show(); } } } } @Override public void onDisconnected() { Log.i(TAG, "Location Disconnected."); if(mLocationClient != null && mLocationClient.isConnected()) mLocationClient.removeLocationUpdates(mLocationListener); } @Override public void onConnectionFailed(ConnectionResult connectionResult) { Log.e(TAG, "Connection failed listener."); } public void setLocationListener(OnNewLocationFoundListener listener) { this.listener = listener; } public void disconnectLocation() { mLocationClient.disconnect(); } }