如何在android中使用后台服务获取经度和经度？
我想使用后台服务来获取用户的经度和经度。我使用以下代码来获取android中的纬度和经度。
public class MyService extends Service { private static final String TAG = "BOOMBOOMTESTGPS"; private LocationManager mLocationManager = null; private static final int LOCATION_INTERVAL = 10; private static final float LOCATION_DISTANCE = 0; Handler mHandler = new Handler(); public SharedPreferences pref; GoogleApiClient mGoogleApiClient = null; Location mLastLocation; Double latitude, longitude; @Override public int onStartCommand(Intent intent, int flags, int startId) { Log.e(TAG, "onStartCommand"); super.onStartCommand(intent, flags, startId); return START_STICKY; } @Override public void onCreate() { super.onCreate(); Log.e(TAG, "onCreate"); initializeLocationManager(); try { mLocationManager.requestLocationUpdates( LocationManager.NETWORK_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE, mLocationListeners[1]); } catch (java.lang.SecurityException ex) { Log.i(TAG, "fail to request location update, ignore", ex); } catch (IllegalArgumentException ex) { Log.d(TAG, "network provider does not exist, " + ex.getMessage()); } try { mLocationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE, mLocationListeners[0]); } catch (java.lang.SecurityException ex) { Log.i(TAG, "fail to request location update, ignore", ex); } catch (IllegalArgumentException ex) { Log.d(TAG, "gps provider does not exist " + ex.getMessage()); } } @Override public void onDestroy() { Log.e(TAG, "onDestroy"); super.onDestroy(); if (mLocationManager != null) { for (int i = 0; i < mLocationListeners.length; i++) { try { 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; } mLocationManager.removeUpdates(mLocationListeners[i]); } catch (Exception ex) { Log.i(TAG, "fail to remove location listners, ignore", ex); } } } } private void initializeLocationManager() { Log.e(TAG, "initializeLocationManager"); if (mLocationManager == null) { mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE); } } private class LocationListener implements android.location.LocationListener { Location mLastLocation; public LocationListener(String provider) { Log.e(TAG, "LocationListener " + provider); mLastLocation = new Location(provider); } @Override public void onLocationChanged(Location location) { Log.e(TAG, "onLocationChanged: " + location); latitude = location.getLatitude(); longitude = location.getLongitude(); Log.d("LATLANG : ", latitude + " " + longitude); mLastLocation.set(location); } @Override public void onProviderDisabled(String provider) { Log.e(TAG, "onProviderDisabled: " + provider); } @Override public void onProviderEnabled(String provider) { Log.e(TAG, "onProviderEnabled: " + provider); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { Log.e(TAG, "onStatusChanged: " + provider); } } LocationListener[] mLocationListeners = new LocationListener[]{ new LocationListener(LocationManager.GPS_PROVIDER), new LocationListener(LocationManager.NETWORK_PROVIDER) }; @Nullable @Override public IBinder onBind(Intent intent) { return null; } } 我使用以下代码从我的活动中调用服务：
Intent start_intent = new Intent(DaLoginActivity.this, MyService.class); startService(start_intent);
这就是我在MyService中调用GPSTracker的地方： –
@Override public int onStartCommand(Intent intent, int flags, int startId) { Log.e(TAG, "onStartCommand"); super.onStartCommand(intent, flags, startId); GPSTracker gps = new GPSTracker(this); if(gps.canGetLocation()){ gps.getLatitude(); // returns latitude gps.getLongitude(); } Toast.makeText(gps, "Latitude : "+gps.getLatitude()+" "+gps.getLongitude(), Toast.LENGTH_SHORT).show(); return START_STICKY;
}
我无法获得经纬度。 任何帮助或建议表示赞赏。谢谢。
使用以下代码……
public class RTGPSLocationService extends Service { private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 0; // Meters private static final long MINIMUM_TIME_BETWEEN_UPDATES = 5000; // in Milliseconds protected LocationManager locationManager; boolean isGPSEnabled = false; boolean isNetworkEnabled = false; private final String TAG = "RTGPSLocationService"; @Override public IBinder onBind(Intent arg0) { return null; } @Override public void onCreate() { super.onCreate(); RTLog.d(TAG, "GPS Service created ..."); locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); RTLog.d("RTGPSLocationService", " " + isGPSEnabled + " " + isNetworkEnabled); if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { RTLog.d(TAG, "Location Permission is declined"); } else { if (isGPSEnabled) { locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, MINIMUM_TIME_BETWEEN_UPDATES, MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, new MyLocationListener()); Location location = locationManager .getLastKnownLocation(LocationManager.GPS_PROVIDER); } else if (isNetworkEnabled) { locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, MINIMUM_TIME_BETWEEN_UPDATES, MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, new MyLocationListener()); Location location = locationManager .getLastKnownLocation(LocationManager.GPS_PROVIDER); callLocationDetailAPI(location); } } } @Override public void onDestroy() { super.onDestroy(); RTLog.d(TAG, "GPS Service destroyed ..."); } private class MyLocationListener implements LocationListener { public void onLocationChanged(Location location) { String message = String.format("New Location \n Longitude: %1$s \n Latitude: %2$s", location.getLongitude(), location.getLatitude()); RTLog.d(TAG, location.getLatitude() + " " + location.getLongitude()); RTLog.d(TAG, message); callLocationDetailAPI(location); } public void onStatusChanged(String s, int i, Bundle b) { } public void onProviderDisabled(String s) { } public void onProviderEnabled(String s) { } } }
使用此代码可以使用主线程获取更新
locateme = new GPSTracker(Home.this); if(locateme.canGetLocation()) { final double latitude = locateme.getLatitude(); final double longitude = locateme.getLongitude(); final float spd = locateme.getSpeed(); }
通过这种背景胎面服务
public class GPSTracker extends Service implements LocationListener { private final Context context; boolean isGPSEnabled = false; boolean isNetworkEnabled = false; boolean canGetLocation = false; Location location; double latitude; double longitude; float spd; private static final long MIN_DISTANCE_CHANGE_FOR_UPDATES = 10; private static final long MIN_TIME_BW_UPDATES = 1000 * 60 * 1; protected LocationManager locationManager; public GPSTracker(Context context) { this.context = context; getLocation(); } public Location getLocation() { try { locationManager = (LocationManager) context.getSystemService(LOCATION_SERVICE); isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); if (!isGPSEnabled && !isNetworkEnabled) { } else { this.canGetLocation = true; if (isGPSEnabled) { if (location == null) { locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this); if (locationManager != null) { location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); spd = location.getSpeed(); } } } } if (isNetworkEnabled) { if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.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.NETWORK_PROVIDER, MIN_TIME_BW_UPDATES, MIN_DISTANCE_CHANGE_FOR_UPDATES, this); if (locationManager != null) { location = locationManager .getLastKnownLocation(LocationManager.NETWORK_PROVIDER); if (location != null) { latitude = location.getLatitude(); longitude = location.getLongitude(); spd = location.getSpeed(); } } } } } catch (Exception e) { e.printStackTrace(); } return location; } public void stopUsingGPS() { if (locationManager != null) { locationManager.removeUpdates(GPSTracker.this); } } public double getLatitude() { if(location != null) { latitude = location.getLatitude(); } return latitude; } public double getLongitude() { if(location != null) { longitude = location.getLongitude(); } return longitude; } public float getSpeed() { if(location != null) { spd = location.getSpeed(); } return spd; } public boolean canGetLocation() { return this.canGetLocation; } public void showSettingsAlert() { AlertDialog.Builder alertDialog = new AlertDialog.Builder(context); alertDialog.setTitle("GPS is settings"); alertDialog.setMessage("GPS is not enabled. Do you want to go to settings menu?"); alertDialog.setPositiveButton("Settings", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); context.startActivity(intent); } }); alertDialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }); alertDialog.show(); } @Override public void onLocationChanged(Location arg0) { // TODO Auto-generated method stub } @Override public void onProviderDisabled(String arg0) { // TODO Auto-generated method stub } @Override public void onProviderEnabled(String arg0) { // TODO Auto-generated method stub } @Override public void onStatusChanged(String arg0, int arg1, Bundle arg2) { // TODO Auto-generated method stub } @Override public IBinder onBind(Intent intent) { // TODO Auto-generated method stub return null; } }
这是您需要从MainActivity类调用的服务类。 我使用了Fused Location Provider，建议获取位置更新： –
public class LocationService extends Service implements LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener { Intent intent; LocationRequest mLocationRequest; GoogleApiClient mGoogleApiClient; Location mLastLocation; String lat, lon; public static String str_receiver = "servicetutorial.service.receiver"; @Nullable @Override public IBinder onBind(Intent intent) { return null; } @Override public void onCreate() { Log.d("Service started Getting", "started!!!!!!!!!!"); super.onCreate(); buildGoogleApiClient(); intent = new Intent(str_receiver); } synchronized void buildGoogleApiClient() { mGoogleApiClient = new GoogleApiClient.Builder(this) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this) .addApi(LocationServices.API) .build(); mGoogleApiClient.connect(); } @Override public void onConnected(@Nullable Bundle bundle) { Log.d("Connected:Getting ", "LOcation!!!!!!!!!!"); mLocationRequest = new LocationRequest(); mLocationRequest.setInterval(30000); mLocationRequest.setFastestInterval(30000); mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY); /* if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) == PackageManager.PERMISSION_GRANTED) { LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, (com.google.android.gms.location.LocationListener) this); }*/ //use if you want location update LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, (com.google.android.gms.location.LocationListener) this); Log.d("LocationUpdatesRequest", "Granted"); 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; } mLastLocation = LocationServices.FusedLocationApi.getLastLocation( mGoogleApiClient); if (mLastLocation != null) { lat = String.valueOf(mLastLocation.getLatitude()); lon = String.valueOf(mLastLocation.getLongitude()); intent.putExtra("latutide",mLastLocation.getLatitude()+""); intent.putExtra("longitude",mLastLocation.getLongitude()+""); sendBroadcast(intent); Log.d("Latitue!!!!",lat); Log.d("Longitude!!!!",lon); } else{ Log.d("Failed","Connection"); //Toast.makeText(this,"Failed",Toast.LENGTH_LONG).show(); } } @Override public int onStartCommand(Intent intent, int flags, int startId) { return super.onStartCommand(intent, flags, startId); } /*@Override public void onConnected(@Nullable Bundle bundle) { }*/ @Override public void onConnectionSuspended(int i) { } @Override public void onLocationChanged(Location location) { mLastLocation = location; lat = String.valueOf(location.getLatitude()); lon = String.valueOf(location.getLongitude()); String msg = "Updated Location: " + Double.toString(location.getLatitude()) + "," + Double.toString(location.getLongitude()); Toast.makeText(this, msg, Toast.LENGTH_SHORT).show(); Log.d("changed","after 30"); } @Override public void onConnectionFailed(@NonNull ConnectionResult connectionResult) { }
}
立即从主要活动中调用服务： –
startService(new Intent(MainActivity.this, LocationService.class)); Toast.makeText(MainActivity.this ,"started",Toast.LENGTH_SHORT).show();
并在MainActivity中添加广播接收器： –
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Toast.makeText(MainActivity.this ,"Broadcast receinved", Toast.LENGTH_SHORT).show(); latitude = Double.valueOf(intent.getStringExtra("latutide")); longitude = Double.valueOf(intent.getStringExtra("longitude")); List addresses = null; try { addresses = geocoder.getFromLocation(latitude, longitude, 1); String cityName = addresses.get(0).getAddressLine(0); String stateName = addresses.get(0).getAddressLine(1); String countryName = addresses.get(0).getAddressLine(2); area.setText(addresses.get(0).getAdminArea()); tv_locality.setText(stateName); tv_address.setText(countryName); } catch (IOException e1) { e1.printStackTrace(); } tv_latitude.setText(latitude+""); tv_longitude.setText(longitude+""); tv_address.getText(); } };