Menedżer lokalizacji: java.lang.NoSuchMethodError

Question

Jestem nowy w tej społeczności, ale już wiele się od ciebie nauczyłam! Właściwie zacząłem programować w Android Studio, ale teraz utknąłem gdzieś. Jestem pewien, że to jest coś prostego, co szybko się przekonasz.

W Emulator Nexus 5 API 23 (ten, który jest już zainstalowany w Androidzie Studio) działa, ale na moim mobilnym Androidzie 5.1.1 API 22 jest gotowy do startu.

Błąd: 09-20 19:15:11.526 17776-17776/com.example.stefano.aiutomamma01 E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.example.stefano.aiutomamma01, PID: 17776 java.lang.NoSuchMethodError: No virtual method checkSelfPermission(Ljava/lang/String;)I in class Lcom/example/stefano/aiutomamma01/MainActivity; or its super classes (declaration of 'com.example.stefano.aiutomamma01.MainActivity' appears in /data/app/com.example.stefano.aiutomamma01-2/base.apk) at com.example.stefano.aiutomamma01.MainActivity.onCreate(MainActivity.java:28) at android.app.Activity.performCreate(Activity.java:5990) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2332) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2442) at android.app.ActivityThread.access$800(ActivityThread.java:156) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1351) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:211) at android.app.ActivityThread.main(ActivityThread.java:5373) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815)

JAVA Kod:

package com.example.stefano.aiutomamma01; 

import android.Manifest; 
import android.content.Context; 
import android.content.pm.PackageManager; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.Toast; 

public class MainActivity extends AppCompatActivity implements LocationListener { 

    //GPS 
    private LocationManager locationManager; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     //GPS 
     locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 
     //CATCHED 
     if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
      // TODO: Consider calling 
      // public void requestPermissions(@NonNull String[] permissions, int requestCode) 
      // 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 Activity#requestPermissions for more details. 
      return; 
     } 
     locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this); 

    } 

    @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 boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 


    //GPS 
    @Override 
    public void onLocationChanged(Location location) { 

     String str = "Latitude: " + location.getLatitude() + "Longitude: " + location.getLongitude(); 

     Toast.makeText(getBaseContext(), str, Toast.LENGTH_LONG).show(); 

    } 

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

    } 

    //GPS 
    @Override 
    public void onProviderEnabled(String provider) { 

    } 

    //GPS 
    @Override 
    public void onProviderDisabled(String provider) { 

    } 

} 

Przepraszamy za złą postu. Btw: ja kulisy znaleźć rozwiązanie w sieci ...

Pozdrowienia

Answer 1

uprawnienia środowiska zostały wprowadzone w tym samym jako API 23 metod, które są wykorzystywane do ich obsługi. Użyj metod klasy ActivityCompat, aby obsłużyć to w kompatybilny wstecz.

if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED 
    && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
    ... 
} 

I tak dalej.