Android用Google Maps APIのgetMyLocation（）でエラーが発生しました。Marshmallow

Question

ユーザーの現在地でマーカーを正確に設定します。私はGoogle Maps API V2.0を使用しています。私のコードは次のとおりです。

package com.acousfit.www.acousfit.Fragments; 

import android.Manifest; 
import android.content.Context; 
import android.content.pm.PackageManager; 
import android.graphics.BitmapFactory; 
import android.location.Criteria; 
import android.location.Geocoder; 
import android.location.Location; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.support.v4.app.ActivityCompat; 
import android.util.Log; 
vimport android.view.View; 
import android.widget.Toast; 

import com.acousfit.www.acousfit.R; 
import com.google.android.gms.common.ConnectionResult; 
import com.google.android.gms.common.api.GoogleApiClient; 
import com.google.android.gms.location.LocationListener; 
import com.google.android.gms.location.LocationServices; 
import com.google.android.gms.maps.CameraUpdateFactory; 
import com.google.android.gms.maps.GoogleMap; 
import com.google.android.gms.maps.SupportMapFragment; 
import com.google.android.gms.maps.model.BitmapDescriptorFactory; 
import com.google.android.gms.maps.model.CameraPosition; 
import com.google.android.gms.maps.model.LatLng; 
import com.google.android.gms.maps.model.Marker; 
import com.google.android.gms.maps.model.MarkerOptions; 
import java.io.IOException; 


/** 

* Created by Vaze on 7/21/2016. 

*/ 



public class MapFragment extends SupportMapFragment implements GoogleApiClient.ConnectionCallbacks, 
    GoogleApiClient.OnConnectionFailedListener, 
    GoogleMap.OnInfoWindowClickListener, 
    GoogleMap.OnMapLongClickListener, 
    GoogleMap.OnMapClickListener, 
    GoogleMap.OnMarkerClickListener, LocationListener { 

private GoogleApiClient mGoogleApiClient; 
private Location mCurrentLocation; 


private final int[] MAP_TYPES = {GoogleMap.MAP_TYPE_SATELLITE, 
     GoogleMap.MAP_TYPE_NORMAL, 
     GoogleMap.MAP_TYPE_HYBRID, 
     GoogleMap.MAP_TYPE_TERRAIN, 
     GoogleMap.MAP_TYPE_NONE}; 
private int curMapTypeIndex = 0; 

@Override 
public void onViewCreated(View view, Bundle savedInstanceState) { 
    super.onViewCreated(view, savedInstanceState); 

    setHasOptionsMenu(true); 

    //googleMap.setMyLocationEnabled(true); 

    mGoogleApiClient = new GoogleApiClient.Builder(getActivity()) 
      .addConnectionCallbacks(this) 
      .addOnConnectionFailedListener(this) 
      .addApi(LocationServices.API) 
      .build(); 

    initListeners(); 
} 


@Override 
public void onInfoWindowClick(Marker marker) { 

} 

@Override 
public void onMapLongClick(LatLng latLng) { 
    MarkerOptions options = new MarkerOptions().position(latLng); 
    options.title(getAddressFromLatLng(latLng)); 

    options.icon(BitmapDescriptorFactory.fromBitmap(
      BitmapFactory.decodeResource(getResources(), 
        R.mipmap.ic_launcher))); 

    getMap().addMarker(options); 
} 


@Override 
public boolean onMarkerClick(Marker marker) { 
    return false; 
} 

@Override 
public void onMapClick(LatLng latLng) { 

    MarkerOptions options = new MarkerOptions().position(latLng); 
    options.title(getAddressFromLatLng(latLng)); 

    options.icon(BitmapDescriptorFactory.defaultMarker()); 
    getMap().addMarker(options); 
} 


@Override 
public void onConnectionSuspended(int i) { 

} 

@Override 
public void onConnectionFailed(ConnectionResult connectionResult) { 

} 

private void initListeners() { 
    getMap().setOnMarkerClickListener(this); 
    getMap().setOnMapLongClickListener(this); 
    getMap().setOnInfoWindowClickListener(this); 
    getMap().setOnMapClickListener(this); 
} 

@Override 
public void onStart() { 
    super.onStart(); 
    mGoogleApiClient.connect(); 
} 

@Override 
public void onStop() { 
    super.onStop(); 
    if (mGoogleApiClient != null && mGoogleApiClient.isConnected()) { 
     mGoogleApiClient.disconnect(); 
    } 
} 

@Override 
public void onConnected(Bundle bundle) { 
    mCurrentLocation = LocationServices 
      .FusedLocationApi.getLastLocation(mGoogleApiClient); 
    //LocationManager locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE); 
    //Criteria criteria = new Criteria(); 
    //String bestProvider = String.valueOf(locationManager.getBestProvider(criteria, true)); 
    //mCurrentLocation = locationManager.getLastKnownLocation(bestProvider); 
    initCamera(getMyLocation()); 


} 

private void initCamera(Location location) { 
    CameraPosition position = CameraPosition.builder() 
      .target(new LatLng(location.getLatitude(), 
        location.getLongitude())) 
      .zoom(16f) 
      .bearing(0.0f) 
      .tilt(0.0f) 
      .build(); 

    getMap().animateCamera(CameraUpdateFactory 
      .newCameraPosition(position), null); 

    getMap().setMapType(MAP_TYPES[curMapTypeIndex]); 
    getMap().setTrafficEnabled(true); 
    getMap().setMyLocationEnabled(true); 
    getMap().getUiSettings().setZoomControlsEnabled(true); 
} 

private String getAddressFromLatLng(LatLng latLng) { 
    Geocoder geocoder = new Geocoder(getActivity()); 

    String address = ""; 
    try { 
     address = geocoder 
       .getFromLocation(latLng.latitude, latLng.longitude, 1) 
       .get(0).getAddressLine(0); 
    } catch (IOException e) { 
    } 

    return address; 
} 


@Override 
public void onLocationChanged(Location location) { 

} 

private Location getMyLocation() { 
    // Get location from GPS if it's available 
    LocationManager lm = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE); 
    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 null; 
    } 
    Location myLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); 

    // Location wasn't found, check the next most accurate place for the current location 
    if (myLocation == null) { 
     Criteria criteria = new Criteria(); 
     criteria.setAccuracy(Criteria.ACCURACY_COARSE); 
     // Finds a provider that matches the criteria 
     String provider = lm.getBestProvider(criteria, true); 
     // Use the provider to get the last known location 
     myLocation = lm.getLastKnownLocation(provider); 
    } 

    return myLocation; 
} 
} 

このフラグメントを開こうとすると、現在の場所がNULLとして返されます。 注：起動時に実行時の権限は、この問題を修正行き方：私は（ちょうどあなたの参照のため）Androidのマシュマロを使用して、指定された最小SDKは5.0.2

解決がアンドロイドです。

Answer 1

あなたのデバイスがandroid-Mであるため、以下の行はあなたにnullを与えています。もしあなたの下の場合はあなたのアンドロイド-Mランタイムパーミッションに適切なコードを実行してください。

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 null; 
} 

次のように行うようにしてください：

Location myLocation =null; 

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. 
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
         requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, ACCESS_COARSE_LOCATION); 
        } 
        return; 
       }else{ 
        myLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER); 

// Location wasn't found, check the next most accurate place for the current location 
        if (myLocation == null) { 
         Criteria criteria = new Criteria(); 
         criteria.setAccuracy(Criteria.ACCURACY_COARSE); 
         // Finds a provider that matches the criteria 
         String provider = lm.getBestProvider(criteria, true); 
         // Use the provider to get the last known location 
         myLocation = lm.getLastKnownLocation(provider); 
         } 

       } 

そしてオーバーライドされたメソッドの下に追加します：アンドロイド6.0のための

@Override 
public void onRequestPermissionsResult(int requestCode, 
             String permissions[], int[] grantResults) { 
      // If request is cancelled, the result arrays are empty. 
      if (grantResults.length > 0 
        && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

       // permission was granted, yay! Do the 
       // location-related task you need to do. 

      } else { 

       // permission denied, boo! Disable the 
       // functionality that depends on this permission. 
      } 
      return; 
     } 
    } 

}