ロケーションをオンにした後にナビゲートしたら、座標を取得するにはどうすればよいですか？

Question

位置をオンにするために使用されたインテントから戻ると、getCoordinatesメソッドを実行する最良の方法を教えてください。背番号をオンにした後で背中を動かすと、アクティビティのライフサイクルはどうなりますか？また、場所の切り替えから戻った場合にgetCoordinatesメソッドを呼び出すのに最適な場所はどこですか？そしてそれがgetCoordinatesメソッドを実行している場合のみですか？

checkLocationOn

public void checkLocationOn() { 
    LocationManager lm = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE); 
    boolean gps_enabled = false; 
    boolean network_enabled = false; 

    try { 
     gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); 
    } catch(Exception ex) {} 

    try { 
     network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 
    } catch(Exception ex) {} 

    if(!gps_enabled && !network_enabled) { 
     // notify user 
     AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity()); 
     dialog.setCancelable(false); 
     dialog.setTitle("Location Needed"); 
     dialog.setMessage("The devices location settings are not enabled, please enable it in order to use this application..."); 
     dialog.setPositiveButton("Open Location Settings", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface paramDialogInterface, int paramInt) { 

       Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
       startActivity(myIntent); 

      } 
     }); 
     dialog.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface paramDialogInterface, int paramInt) { 
       // TODO Auto-generated method stub 

      } 
     }); 
     dialog.show(); 
    } 

} 

getCoordinates

public void getCoordinates() { 
    if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), 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; 
    } 
    mFusedLocationClient.getLastLocation() 
      .addOnSuccessListener(getActivity(), new OnSuccessListener<Location>() { 
       @Override 
       public void onSuccess(Location location) { 

        lat = location.getLatitude(); 
        lng = location.getLongitude(); 

        latitude = Double.toString(lat); 
        longitude = Double.toString(lng); 

        SharedPreferences.Editor e = preferences.edit(); 
        e.putString("myLats",latitude); 
        e.putString("myLngs",longitude); 
        e.commit(); 

       } 
      }); 
} 

onCreateView

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 

    v = inflater.inflate(R.layout.job_search_fragment, container, false); 

    mFusedLocationClient = LocationServices.getFusedLocationProviderClient(getActivity()); 

     checkLocationOn(); 

     getCoordinates(); 

     //Please help here 



    return v; 
} 

Answer 1

onResumeを上書きし、そこからcheckLocationOn();とgetCoordinates();の両方を呼び出します。

継続的なロケーションの更新をリクエストしている場合は、メソッドでリクエストを削除できます。

Answer 2

ありがとうarsena、私はちょうどブール値にcheckLocationOn（）を変更し、次にcheckLocationOn（）がtrueの場合はonResume（）でgetCoordinate（）を呼び出します。 onResume（）で、その後

public boolean checkLocationOn() { 

    LocationManager lm = (LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE); 
    boolean gps_enabled = false; 
    boolean network_enabled = false; 

    try { 
     gps_enabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER); 
    } catch(Exception ex) {} 

    try { 
     network_enabled = lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 
    } catch(Exception ex) {} 
    if(!gps_enabled && !network_enabled) { 
     // notify user 
     final AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity()); 
     dialog.setCancelable(false); 
     dialog.setTitle("Location Needed"); 
     dialog.setMessage("The devices location settings are not enabled, please enable it in order to use this application..."); 
     dialog.setPositiveButton("Open Location Settings", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface paramDialogInterface, int paramInt) { 
       Intent myIntent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
       startActivity(myIntent); 
      } 
     }); 
     dialog.show(); 
     return false; 
    }else{ 
     return true; 
    } 
} 

@Override 
public void onResume() { 
    super.onResume(); 

    if(checkLocationOn()){ 
     getCoordinates(); 
    } 
} 

その私はあなたがこのリンクをたどるSHOLDだと思う今