沒有在棒棒糖和棉花糖

Question

我有一個項目找到位置提供者發現使用經度和緯度的地址。我得到了答案傑利貝恩但是當談到棒棒堂和棉花糖，只顯示經緯度，沒有得到的地址。它顯示找不到位置提供商。我的代碼中是否有錯誤？

locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE); 
    Criteria criteria = new Criteria(); 
    mprovider = locationManager.getBestProvider(criteria, false); 

    if (mprovider != null && !mprovider.equals("")) { 
     if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != 
       PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) 
       != PackageManager.PERMISSION_GRANTED) { 
      return; 
     } 
     Location location = locationManager.getLastKnownLocation(mprovider); 
    locationManager.requestLocationUpdates(mprovider,5000, 0,this); 
     locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); 
     if (location != null) 
      onLocationChanged(location); 
     else 
      Toast.makeText(getBaseContext(), "No Location Provider Found Check Your Code", Toast.LENGTH_SHORT).show(); 
    } 
} 

@Override 
public void onLocationChanged(Location location) { 
    TextView longitude = (TextView) findViewById(R.id.textView); 
    TextView latitude = (TextView) findViewById(R.id.textView1); 

    longitude.setText("Current Longitude:" + location.getLongitude()); 
    latitude.setText("Current Latitude:" + location.getLatitude()); 
    Geocoder geo = new Geocoder(getApplicationContext(), Locale.getDefault()); 

    // String mylocation; 
    try { 
     List <Address> addresses = geo.getFromLocation(location.getLatitude(), location.getLongitude(), 1); 
     if (addresses != null && addresses.size() > 0) { 
      String address = addresses.get(0).getAddressLine(0); // If any additional address line present than only, check with max available address lines by getMaxAddressLineIndex() 
      address1.setText(address); 
      String city = addresses.get(0).getLocality(); 
      textViewCity.setText(city); 
      String state = addresses.get(0).getAdminArea(); 
      textViewState.setText(state); 
      String country = addresses.get(0).getCountryName(); 
      textViewCountry.setText(country); 
      String postalCode = addresses.get(0).getPostalCode(); 
      textViewPostal.setText(postalCode); 
      String knownName = addresses.get(0).getFeatureName(); 

      System.out.println("Address >> " + address + " " +city+ " \n" + state + " \n" + country+ "\n"+postalCode+ "\n"+knownName); 

     } 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

Answer 1

添加此類。

public class SingleShotLocationProvider { 

    public static interface LocationCallback { 
     public void onNewLocationAvailable(GPSCoordinates location); 
    } 

    // calls back to calling thread, note this is for low grain: if you want higher precision, swap the 
    // contents of the else and if. Also be sure to check gps permission/settings are allowed. 
    // call usually takes <10ms 
    public static void requestSingleUpdate(final Context context, final LocationCallback callback) { 
     final LocationManager locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); 
     boolean isNetworkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 
     if (isNetworkEnabled) { 
      Criteria criteria = new Criteria(); 
      criteria.setAccuracy(Criteria.ACCURACY_COARSE); 
      if (ActivityCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED 
        && ActivityCompat.checkSelfPermission(context, 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.requestSingleUpdate(criteria, new LocationListener() { 
       @Override 
       public void onLocationChanged(Location location) { 
        callback.onNewLocationAvailable(new GPSCoordinates(location.getLatitude(), location.getLongitude())); 
       } 

       @Override 
       public void onStatusChanged(String provider, int status, Bundle extras) { 
       } 

       @Override 
       public void onProviderEnabled(String provider) { 
       } 

       @Override 
       public void onProviderDisabled(String provider) { 
       } 
      }, null); 
     } else { 
      boolean isGPSEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); 
      if (isGPSEnabled) { 
       Criteria criteria = new Criteria(); 
       criteria.setAccuracy(Criteria.ACCURACY_FINE); 
       locationManager.requestSingleUpdate(criteria, new LocationListener() { 
        @Override 
        public void onLocationChanged(Location location) { 
         callback.onNewLocationAvailable(new GPSCoordinates(location.getLatitude(), location.getLongitude())); 
        } 

        @Override public void onStatusChanged(String provider, int status, Bundle extras) { } 
        @Override public void onProviderEnabled(String provider) { } 
        @Override public void onProviderDisabled(String provider) { } 
       }, null); 
      } 
     } 
    } 


    // consider returning Location instead of this dummy wrapper class 
    public static class GPSCoordinates { 
     public float longitude = -1; 
     public float latitude = -1; 

     public GPSCoordinates(float theLatitude, float theLongitude) { 
      longitude = theLongitude; 
      latitude = theLatitude; 
     } 

     public GPSCoordinates(double theLatitude, double theLongitude) { 
      longitude = (float) theLongitude; 
      latitude = (float) theLatitude; 
     } 
    } 
} 

，並使用這樣的：

SingleShotLocationProvider.requestSingleUpdate(getActivity(), 
          new SingleShotLocationProvider.LocationCallback() { 
           @Override 
           public void onNewLocationAvailable(SingleShotLocationProvider.GPSCoordinates location) { 
            lat = location.latitude; 
            lag = location.longitude; 
           } 
          }); 

在這裏你可以得到緯度 - 滯後，如果你的設備位置啓用。所以也檢查是否啓用。

if (!manager.isProviderEnabled(LocationManager.GPS_PROVIDER)) { 
        showEnableLocationDialog(); 
       } else { 
            SingleShotLocationProvider.requestSingleUpdate(getActivity(), 
          new SingleShotLocationProvider.LocationCallback() { 
           @Override 
           public void onNewLocationAvailable(SingleShotLocationProvider.GPSCoordinates location) { 
            lat = location.latitude; 
            lag = location.longitude; 
           } 
          }); 
       } 



public void showEnableLocationDialog() { 
     final android.app.AlertDialog.Builder builderDialog = new android.app.AlertDialog.Builder(getActivity()); 
     builderDialog.setTitle("Enable Location"); 
     builderDialog.setMessage("Please enable location for near by search"); 
     builderDialog.setPositiveButton("Enable", 
       new DialogInterface.OnClickListener() { 
        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
         startActivity(myIntent); 
        } 
       }); 
     builderDialog.setNegativeButton("No", 
       new DialogInterface.OnClickListener() { 
        @Override 
        public void onClick(DialogInterface dialog, int which) { 
         dialog.dismiss(); 
         //fetchImages(); 
        } 
       }); 
     android.app.AlertDialog alert = builderDialog.create(); 
     alert.show(); 
    } 

並且我希望您先要求位置的運行時權限。否則你將永遠得不到位置。