locationManager.getBestProvider return null

Question

プロバイダに問題があります。私のマニフェストでCOARSEとFINEの位置情報アクセス権を有効にしていますが、起動時にアプリがクラッシュします。私はまた、インターネットのアクセス許可を追加しました。

マイコード：

E/AndroidRuntime: FATAL EXCEPTION: main 
       Process: com.project.korsa.korsa, PID: 32462 
       java.lang.RuntimeException: Unable to start activity ComponentInfo{com.project.korsa.korsa/com.project.korsa.korsa.YourLocation}: java.lang.IllegalArgumentException: invalid provider: null 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3305) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3401) 
        at android.app.ActivityThread.access$1100(ActivityThread.java:229) 
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821) 
        at android.os.Handler.dispatchMessage(Handler.java:102) 
        at android.os.Looper.loop(Looper.java:148) 
        at android.app.ActivityThread.main(ActivityThread.java:7303) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 
       Caused by: java.lang.IllegalArgumentException: invalid provider: null 
        at android.location.LocationManager.checkProvider(LocationManager.java:1761) 
        at android.location.LocationManager.requestLocationUpdates(LocationManager.java:464) 
        at com.project.korsa.korsa.YourLocation.onCreate(YourLocation.java:135) 
        at android.app.Activity.performCreate(Activity.java:6904) 
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1136) 
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3252) 
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3401)  
        at android.app.ActivityThread.access$1100(ActivityThread.java:229)  
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1821)  
        at android.os.Handler.dispatchMessage(Handler.java:102)  
        at android.os.Looper.loop(Looper.java:148)  
        at android.app.ActivityThread.main(ActivityThread.java:7303)  
        at java.lang.reflect.Method.invoke(Native Method)  
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)  
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)  

Answer 1

チェックgetBestProvider（）あなたが求めてきましたへのお電話でこのanwser https://stackoverflow.com/a/10688606/3973521

：ここ

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

    if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { 
     ActivityCompat.requestPermissions(
       this, 
       new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION, android.Manifest.permission.ACCESS_FINE_LOCATION}, 
       PERMISSION_LOCATION_REQUEST_CODE); 
    } 
    locationManager.requestLocationUpdates(provider, 400, 1, this); 

とlogcatです有効なプロバイダ のみ（メソッドの2番目のパラメータです がtrueに設定されています）。ユーザーがすべてのプロバイダを無効にした場合は、 がnullになります。