java.lang.IllegalArgumentException: недействительный провайдер: null

Question

У меня проблема с провайдером, похоже, мое приложение падает при запуске, хотя я разрешил разрешения местоположения COARSE и FINE в моем манифесте (самые последние ответы найдены в Интернете). У меня также добавлено разрешение INTERNET. Во время тестирования на моем телефоне у меня включен WIFI и GPS. Я действительно не понимаю, в чем проблема, даже я перезапустил свой телефон, чтобы быть уверенным, и у меня такая же проблема. Он возвращает недопустимое исключение аргумента null в строке поставщика.

public class MainActivity extends FragmentActivity implements LocationListener{ 

GoogleMap mGoogleMap; 
Spinner mSprPlaceType; 

String[] mPlaceType=null; 
String[] mPlaceTypeName=null; 

double mLatitude=0; 
double mLongitude=0; 

HashMap<String, String> mMarkerPlaceLink = new HashMap<String, String>(); 

@Override 
protected void onCreate(Bundle savedInstanceState) { 

    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

// Array of place types 
    mPlaceType = getResources().getStringArray(R.array.place_type); 

// Array of place type names 
    mPlaceTypeName = getResources().getStringArray(R.array.place_type_name); 

// Creating an array adapter with an array of Place types 
// to populate the spinner 
    ArrayAdapter adapter = new ArrayAdapter(this, 
    android.R.layout.simple_spinner_dropdown_item, mPlaceTypeName); 

// Getting reference to the Spinner 
    mSprPlaceType = (Spinner) findViewById(R.id.spr_place_type); 

// Setting adapter on Spinner to set place types 
    mSprPlaceType.setAdapter(adapter); 

    Button btnFind; 

// Getting reference to Find Button 
    btnFind = (Button) findViewById(R.id.btn_find); 

// Getting Google Play availability status 
    int status = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getBaseContext()); 

    if(status!=ConnectionResult.SUCCESS){ // Google Play Services are not available 

     int requestCode = 10; 
     Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this, requestCode); 
     dialog.show(); 

    }else { // Google Play Services are available 



// Getting reference to the SupportMapFragment 
     SupportMapFragment fragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); 

// Getting Google Map 
     mGoogleMap = fragment.getMap(); 

// Enabling MyLocation in Google Map 
     mGoogleMap.setMyLocationEnabled(true); 

// Getting LocationManager object from System Service LOCATION_SERVICE 
     LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 



// Creating a criteria object to retrieve provider 
     Criteria criteria = new Criteria(); 

// Getting the name of the best provider 
     String provider = locationManager.getBestProvider(criteria, true); 

// Getting Current Location From GPS 
/******* IllegalArgumentException HERE *******/ 
     Location location = locationManager.getLastKnownLocation(provider); 

     if(location!=null){ 
      onLocationChanged(location); 
     } 

     locationManager.requestLocationUpdates(provider, 20000, 0, this); 

     mGoogleMap.setOnInfoWindowClickListener(new OnInfoWindowClickListener() { 

      @Override 
      public void onInfoWindowClick(Marker arg0) { 
       Intent intent = new Intent(getBaseContext(), PlaceDetailsActivity.class); 
       String reference = mMarkerPlaceLink.get(arg0.getId()); 
       intent.putExtra("reference", reference); 

// Starting the Place Details Activity 
       startActivity(intent); 
      } 
     }); 

// Setting click event lister for the find button 
     btnFind.setOnClickListener(new OnClickListener() { 

      @Override 
      public void onClick(View v) { 

       int selectedPosition = mSprPlaceType.getSelectedItemPosition(); 
       String type = mPlaceType[selectedPosition]; 

       StringBuilder sb = new StringBuilder("https://maps.googleapis.com/maps/api/place/nearbysearch/json?"); 
       sb.append("location="+mLatitude+","+mLongitude); 
       sb.append("&radius=5000"); 
       sb.append("&types="+type); 
       sb.append("&sensor=true"); 
       sb.append("&key=API_KEY"); 

// Creating a new non-ui thread task to download Google place json data 
       PlacesTask placesTask = new PlacesTask(); 

// Invokes the "doInBackground()" method of the class PlaceTask 
       placesTask.execute(sb.toString()); 

      } 
     }); 

    } 

} 

/** A method to download json data from url */ 
private String downloadUrl(String strUrl) throws IOException{ 
    String data = ""; 
    InputStream iStream = null; 
    HttpURLConnection urlConnection = null; 
    try{ 
     URL url = new URL(strUrl); 

// Creating an http connection to communicate with url 
     urlConnection = (HttpURLConnection) url.openConnection(); 

// Connecting to url 
     urlConnection.connect(); 

// Reading data from url 
     iStream = urlConnection.getInputStream(); 

     BufferedReader br = new BufferedReader(new InputStreamReader(iStream)); 

     StringBuffer sb = new StringBuffer(); 

     String line = ""; 
     while((line = br.readLine()) != null){ 
      sb.append(line); 
     } 

     data = sb.toString(); 

     br.close(); 

    }catch(Exception e){ 
     Log.d("Exception while downloading url", e.toString()); 
    }finally{ 
     iStream.close(); 
     urlConnection.disconnect(); 
    } 

    return data; 
} 

/** A class, to download Google Places */ 
private class PlacesTask extends AsyncTask<String, Integer, String>{ 

    String data = null; 

    // Invoked by execute() method of this object 
    @Override 
    protected String doInBackground(String... url) { 
     try{ 
      data = downloadUrl(url[0]); 
     }catch(Exception e){ 
      Log.d("Background Task",e.toString()); 
     } 
     return data; 
    } 

    // Executed after the complete execution of doInBackground() method 
    @Override 
    protected void onPostExecute(String result){ 
     ParserTask parserTask = new ParserTask(); 

// Start parsing the Google places in JSON format 
// Invokes the "doInBackground()" method of the class ParseTask 
     parserTask.execute(result); 
    } 

} 

/** A class to parse the Google Places in JSON format */ 
private class ParserTask extends AsyncTask<String, Integer, List<HashMap<String,String>>>{ 

    JSONObject jObject; 

    // Invoked by execute() method of this object 
    @Override 
    protected List<HashMap<String,String>> doInBackground(String... jsonData) { 

     List<HashMap<String, String>> places = null; 
     PlaceJSONParser placeJsonParser = new PlaceJSONParser(); 

     try{ 
      jObject = new JSONObject(jsonData[0]); 

/** Getting the parsed data as a List construct */ 
      places = placeJsonParser.parse(jObject); 

     }catch(Exception e){ 
      Log.d("Exception",e.toString()); 
     } 
     return places; 
    } 

    // Executed after the complete execution of doInBackground() method 
    @Override 
    protected void onPostExecute(List<HashMap<String,String>> list){ 

// Clears all the existing markers 
     mGoogleMap.clear(); 

     for(int i=0;i <list.size();i++){ 

// Creating a marker 
      MarkerOptions markerOptions = new MarkerOptions(); 

// Getting a place from the places list 
      HashMap<String, String> hmPlace = list.get(i); 

// Getting latitude of the place 
      double lat = Double.parseDouble(hmPlace.get("lat")); 

// Getting longitude of the place 
      double lng = Double.parseDouble(hmPlace.get("lng")); 

// Getting name 
      String name = hmPlace.get("place_name"); 

// Getting vicinity 
      String vicinity = hmPlace.get("vicinity"); 

      LatLng latLng = new LatLng(lat, lng); 

// Setting the position for the marker 
      markerOptions.position(latLng); 

// Setting the title for the marker. 
//This will be displayed on taping the marker 
      markerOptions.title(name + " : " + vicinity); 

// Placing a marker on the touched position 
      Marker m = mGoogleMap.addMarker(markerOptions); 

// Linking Marker id and place reference 
      mMarkerPlaceLink.put(m.getId(), hmPlace.get("reference")); 

     } 

    } 

} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
// Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_main, menu); 
    return true; 
} 

@Override 
public void onLocationChanged(Location location) { 
    mLatitude = location.getLatitude(); 
    mLongitude = location.getLongitude(); 
    LatLng latLng = new LatLng(mLatitude, mLongitude); 

    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLng(latLng)); 
    mGoogleMap.animateCamera(CameraUpdateFactory.zoomTo(12)); 

} 


@Override 
public void onProviderDisabled(String provider) { 
// TODO Auto-generated method stub 

} 

@Override 
public void onProviderEnabled(String provider) { 
// TODO Auto-generated method stub 

} 

@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 
// TODO Auto-generated method stub 
} 
} 

А вот LogCat:

10-27 13:45:52.615 13986-13986/com.pfe.neighborhoodserviceslbs 
    E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    Process: com.pfe.neighborhoodserviceslbs, PID: 13986 
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.pfe.neighborhoodserviceslbs/com.pfe.neighborhoodserviceslbs.MainActivity}: java.lang.IllegalArgumentException: invalid provider: null 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) 
     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
     at android.app.ActivityThread.-wrap11(ActivityThread.java) 
     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
     at android.os.Handler.dispatchMessage(Handler.java:102) 
     at android.os.Looper.loop(Looper.java:148) 
     at android.app.ActivityThread.main(ActivityThread.java:5417) 
     at java.lang.reflect.Method.invoke(Native Method) 
     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: java.lang.IllegalArgumentException: invalid provider: null 
     at android.location.LocationManager.checkProvider(LocationManager.java:1704) 
     at android.location.LocationManager.getLastKnownLocation(LocationManager.java:1194) 
     at com.pfe.neighborhoodserviceslbs.MainActivity.onCreate(MainActivity.java:129) 
     at android.app.Activity.performCreate(Activity.java:6237) 
     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

Answer 1

Я нашел решение этой проблемы! Проблема с API 23, после некоторых исследований я решил перейти на API 21, и это сработало просто отлично.

Так я изменил мою build.gradle, как показано ниже:

compileSdkVersion 21

buildToolsVersion "21.1.2"