我试图获得用户的位置作为经常可用的GPS /网络的经度和纬度,我想快速得到它,否则如果现在无法获得新的位置坐标将返回.
这是我的尝试：
public class GPSTracker extends Service{ // The minimum distance to change Updates in meters private static final long MIN_disTANCE_CHANGE_FOR_UPDATES = 10; // 10 meters // The minimum time between updates in milliseconds private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; // 1 minute private final Context mContext; // Declaring a Location Manager protected LocationManager locationManager; // flag for GPS status boolean isGPSEnabled = false; // flag for network status boolean isNetworkEnabled = false; // flag for GPS status boolean canGetLocation = false; Location location = null; // location double latitude; // latitude double longitude; // longitude myLocationlitener locationlitener; public GPSTracker(Context context) { this.mContext = context; locationlitener = new myLocationlitener(); getLocation(); } public Location getLocation() { try { locationManager = (LocationManager) mContext .getSystemService(LOCATION_SERVICE); // getting GPS status isGPSEnabled = locationManager .isProvIDerEnabled(LocationManager.GPS_PROVIDER); // getting network status isNetworkEnabled = locationManager .isProvIDerEnabled(LocationManager.NETWORK_PROVIDER); if (!isGPSEnabled && !isNetworkEnabled) { // no network provIDer is enabled } else { this.canGetLocation = true; if (isNetworkEnabled) { locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_disTANCE_CHANGE_FOR_UPDATES,locationlitener); Log.d("Network", "Network Enabled"); if (locationManager != null) { location = locationManager .getLastKNownLocation(LocationManager.NETWORK_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); } } } // if GPS Enabled get lat/long using GPS Services if (isGPSEnabled) { if (location == null) { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // Todo: ConsIDer calling // ActivityCompat#requestPermissions // here to request the missing permissions, and then overrIDing // public voID onRequestPermissionsResult(int requestCode, String[] permissions, // int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return null; } locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_disTANCE_CHANGE_FOR_UPDATES, locationlitener); Log.d("GPS", "GPS Enabled"); if (locationManager != null) { location = locationManager.getLastKNownLocation(LocationManager.GPS_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); } } } } } } catch (Exception e) { e.printstacktrace(); } return location; } /** * Stop using GPS Listener Calling this function will stop using GPS in your * app */ public voID stopUsingGPS() { if (locationManager != null) { if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { // Todo: ConsIDer calling // ActivityCompat#requestPermissions // here to request the missing permissions, and then overrIDing // public voID onRequestPermissionsResult(int requestCode, String[] permissions, // int[] grantResults) // to handle the case where the user grants the permission. See the documentation // for ActivityCompat#requestPermissions for more details. return; } locationManager.removeUpdates(locationlitener); } } /** * Function to get latitude */ public double getLatitude() { if (location != null) { latitude = location.getLatitude(); } // return latitude return latitude; } /** * Function to get longitude */ public double getLongitude() { if (location != null) { longitude = location.getLongitude(); } // return longitude return longitude; } /** * Function to check GPS/wifi enabled * * @return boolean */ public boolean canGetLocation() { return this.canGetLocation; } /** * Function to show settings alert dialog On pressing Settings button will * lauch Settings Options */ public voID showSettingsAlert() { AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); // Setting Dialog Title alertDialog.setTitle("GPS is settings"); // Setting Dialog Message alertDialog .setMessage("GPS is not enabled. Do you want to go to settings menu?"); // On pressing Settings button alertDialog.setPositivebutton("Settings", new DialogInterface.OnClickListener() { public voID onClick(DialogInterface dialog, int which) { Intent intent = new Intent( Settings.ACTION_LOCATION_SOURCE_SETTINGS); mContext.startActivity(intent); } }); // on pressing cancel button alertDialog.setNegativebutton("Cancel", new DialogInterface.OnClickListener() { public voID onClick(DialogInterface dialog, int which) { dialog.cancel(); } }); // Showing Alert Message alertDialog.show(); } @OverrIDe public IBinder onBind(Intent arg0) { return null; } private class myLocationlitener implements LocationListener{ @OverrIDe public voID onLocationChanged(Location location) { } @OverrIDe public voID onStatusChanged(String provIDer, int status, Bundle extras) { } @OverrIDe public voID onProvIDerEnabled(String provIDer) { } @OverrIDe public voID onProvIDerDisabled(String provIDer) { } }}我怎么用这堂课？
假设我在异步任务中运行下面的函数(谁不知道androID注释@Background正在这样做)
@Background voID getmyLocationAndSend(){ GPSTracker gps = new GPSTracker(context); // check if GPS location can get Location if (gps.canGetLocation()) { LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); if (locationManager.isProvIDerEnabled(LocationManager.NETWORK_PROVIDER)) { Log.d("Your Location", "latitude:" + gps.getLatitude() + ", longitude: " + gps.getLongitude()); latitude = gps.getLatitude(); // set the globals longitude = gps.getLongitude(); // set the globals }else{ showToast("Network is connected.."); if (progress != null && progress.isShowing()) { progress.dismiss(); } } }else{ showToast("Cannot get location from gps.."); if (progress != null && progress.isShowing()) { progress.dismiss(); } } }我的目标是在不到30秒内获得坐标,永远不会得到0.0值,我怎样才能实现任何帮助？
解决方法:
请检查我在我的应用程序中的使用方式及其完美的工作方式.我使用融合API进行更新,请按照几个步骤进行 *** 作.目前您使用的是非常古老的方法.所以,现在没有必要
并以毫秒为单位传递你想要的时间
UPDATE_INTERVAL_IN_MILliSECONDS
第1步.上课
GoogleLocationService.java
public class GoogleLocationService {private GoogleServicesCallbacks callbacks = new GoogleServicesCallbacks();LocationUpdateListener locationUpdateListener;Context activity;protected Googleapiclient mGoogleapiclient;protected LocationRequest mLocationRequest;public static final long UPDATE_INTERVAL_IN_MILliSECONDS = 30000;public GoogleLocationService(Context activity, LocationUpdateListener locationUpdateListener) { this.locationUpdateListener = locationUpdateListener; this.activity = activity; buildGoogleapiclient();}protected synchronized voID buildGoogleapiclient() { //Log.i(TAG, "Building Googleapiclient"); mGoogleapiclient = new Googleapiclient.Builder(activity) .addConnectionCallbacks(callbacks) .addOnConnectionFailedListener(callbacks) .addAPI(LocationServices.API) .build(); createLocationRequest(); mGoogleapiclient.connect();}protected voID createLocationRequest() { mLocationRequest = new LocationRequest(); mLocationRequest.setInterval(UPDATE_INTERVAL_IN_MILliSECONDS); mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);}private class GoogleServicesCallbacks implements Googleapiclient.ConnectionCallbacks, Googleapiclient.OnConnectionFailedListener, LocationListener { @OverrIDe public voID onConnected(Bundle bundle) { startLocationUpdates(); } @OverrIDe public voID onConnectionSuspended(int i) { mGoogleapiclient.connect(); } @OverrIDe public voID onConnectionFailed(@NonNull ConnectionResult connectionResult) { if (connectionResult.getErrorCode() == ConnectionResult.SERVICE_VERSION_UPDATE_required) { Toast.makeText(activity, "Google play service not updated", Toast.LENGTH_LONG).show(); } locationUpdateListener.cannotReceiveLocationUpdates(); } @OverrIDe public voID onLocationChanged(Location location) { if (location.hasAccuracy()) { if (location.getAccuracy() < 30) { locationUpdateListener.updateLocation(location); } } }}private static boolean locationEnabled(Context context) { boolean gps_enabled = false; LocationManager lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); try { gps_enabled = lm.isProvIDerEnabled(LocationManager.GPS_PROVIDER); } catch (Exception ex) { ex.printstacktrace(); } return gps_enabled;}private boolean servicesConnected(Context context) { return isPackageInstalled(GooglePlayServicesUtil.Google_PLAY_STORE_PACKAGE, context);}private boolean isPackageInstalled(String packagename, Context context) { PackageManager pm = context.getPackageManager(); try { pm.getPackageInfo(packagename, PackageManager.GET_ACTIVITIES); return true; } catch (PackageManager.nameNotFoundException e) { e.printstacktrace(); return false; }}public voID startUpdates() { /* * Connect the clIEnt. Don't re-start any requests here; instead, wait * for onResume() */ if (servicesConnected(activity)) { if (locationEnabled(activity)) { locationUpdateListener.canReceiveLocationUpdates(); startLocationUpdates(); } else { locationUpdateListener.cannotReceiveLocationUpdates(); Toast.makeText(activity, "Unable to get your location.Please turn on your device Gps", Toast.LENGTH_LONG).show(); } } else { locationUpdateListener.cannotReceiveLocationUpdates(); Toast.makeText(activity, "Google play service not available", Toast.LENGTH_LONG).show(); }}//stop location updatespublic voID stopUpdates() { stopLocationUpdates();}//start location updatesprivate voID startLocationUpdates() { if (checkSelfPermission(activity, ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(activity, ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { return; } if (mGoogleapiclient.isConnected()) { LocationServices.FusedLocationAPI.requestLocationUpdates(mGoogleapiclient, mLocationRequest, callbacks); }}public voID stopLocationUpdates() { if (mGoogleapiclient.isConnected()) { LocationServices.FusedLocationAPI.removeLocationUpdates(mGoogleapiclient, callbacks); }}public voID startGoogleAPI() { mGoogleapiclient.connect();}public voID closeGoogleAPI() { mGoogleapiclient.disconnect();} }第2步.制作这个界面
LocationUpdateListener.java
public interface LocationUpdateListener {/** * Called immediately the service starts if the service can obtain location */voID canReceiveLocationUpdates();/** * Called immediately the service trIEs to start if it cannot obtain location - eg the user has Disabled wireless and */voID cannotReceiveLocationUpdates();/** * Called whenever the location has changed (at least non-trivially) * @param location */voID updateLocation(Location location);/** * Called when GoogleLocationServices detects that the device has moved to a new location. * @param localityname The name of the locality (somewhere below street but above area). */voID updateLocationname(String localityname, Location location);}第3步.制作此位置服务类
LocationService.java
public class LocationService extends Service {private GoogleLocationService GoogleLocationService;@OverrIDepublic voID onCreate() { super.onCreate(); //start the handler for getting locations //create component updateLocation(getApplicationContext());}@OverrIDepublic int onStartCommand(Intent intent, int flags, int startID) { return Service.START_STICKY;}//get current location os userprivate voID updateLocation(Context context) { GoogleLocationService = new GoogleLocationService(context, new LocationUpdateListener() { @OverrIDe public voID canReceiveLocationUpdates() { } @OverrIDe public voID cannotReceiveLocationUpdates() { } //update location to our servers for tracking purpose @OverrIDe public voID updateLocation(Location location) { if (location != null ) { Timber.e("updated location %1$s %2$s", location.getLatitude(), location.getLongitude()); } } @OverrIDe public voID updateLocationname(String localityname, Location location) { GoogleLocationService.stopLocationUpdates(); } }); GoogleLocationService.startUpdates();}IBinder mBinder = new LocalBinder();public class LocalBinder extends Binder { public LocationService getServerInstance() { return LocationService.this; }}@OverrIDepublic IBinder onBind(Intent intent) { return mBinder;}//stop location updates on stopPing the service@OverrIDepublic voID onDestroy() { super.onDestroy(); if (GoogleLocationService != null) { GoogleLocationService.stopLocationUpdates(); }}}编辑答案：
如何使用服务,
在您的主要活动中启动服务,如下所示
startService(new Intent(context, LocationService.class));停止,
stopService(new Intent(context, LocationService.class));并在清单中声明,
<service androID:name=".service.location.LocationService" androID:enabled="true"></service>注意：我这样做是因为我在杀死app后需要位置.如果你不想要服务.那么,你可以直接在类中需要更新位置的代码下面调用并删除locationservice.
private GoogleLocationService GoogleLocationService; GoogleLocationService = new GoogleLocationService(context, new LocationUpdateListener() { @OverrIDe public voID canReceiveLocationUpdates() { } @OverrIDe public voID cannotReceiveLocationUpdates() { } //update location to our servers for tracking purpose @OverrIDe public voID updateLocation(Location location) { if (location != null ) { Timber.e("updated location %1$s %2$s", location.getLatitude(), location.getLongitude()); } } @OverrIDe public voID updateLocationname(String localityname, Location location) { GoogleLocationService.stopLocationUpdates(); }});GoogleLocationService.startUpdates();and call this onDestroy if (GoogleLocationService != null) { GoogleLocationService.stopLocationUpdates();}记住,Locationservice也应该在清单中声明.
据我说这是最好的解决方案.我在现场做了很多工作.
谢谢希望这会对你有所帮助
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