sharedpreferencesを編集するときにLooper.prepare（）を呼び出さなかったスレッド内でハンドラを作成できません。

FCMのNoSQLデータベースを使用するサンプルアプリケーションを学び、開発しようとしています。私はFirebaseコンソールに自分のアプリを正常に登録しました。また、私のアプリからFCMサーバーへの接続が明白であることを示す、このアプリを通じていくつかのダミー値をデータベースに書きました。さて、何らかの理由でsharedpreferencesを使いたいと思います。私はのonCreateメソッドでは、キーと値のペアを編集しようとすると、それは私に、このエラーを与える：sharedpreferencesを編集するときにLooper.prepare（）を呼び出さなかったスレッド内でハンドラを作成できません。

Can't create handler inside thread that has not called Looper.prepare()

そして、それはである：com.example.ankitshubham.ribbon.MyFirebaseInstanceIDService.onTokenRefresh（MyFirebaseInstanceIDService.javaで：18） `

これはMainActivityある：

public class MainActivity extends AppCompatActivity { 
    private DatabaseReference mDatabase; 
    private final int MY_PERMISSIONS_REQUEST_READ_GET_ACCOUNTS =10; 
    SharedPreferences sharedPreferences; 
    private final static String INIT_DB = "init_db"; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     FirebaseDatabase.getInstance().setPersistenceEnabled(true); 
     mDatabase = FirebaseDatabase.getInstance().getReference(); 
     sharedPreferences = getSharedPreferences(INIT_DB, MODE_PRIVATE); 
     if (!sharedPreferences.contains("firstrun")) { 
      Toast.makeText(getApplicationContext(),"first run",Toast.LENGTH_SHORT).show(); 
      sharedPreferences.edit().putBoolean("firstrun", false).commit(); 
     } 
     else { 
      Toast.makeText(getApplicationContext(),"not the first run",Toast.LENGTH_SHORT).show(); 
     } 
    } 
}

これはMyFirebaseInstanceIDServiceある：

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService { 
    @Override 
    public void onTokenRefresh() { 
     super.onTokenRefresh(); 
     Log.i("Updated token", FirebaseInstanceId.getInstance().getToken()); 
     Toast.makeText(getApplicationContext(), FirebaseInstanceId.getInstance().getToken(),Toast.LENGTH_SHORT).show(); 

    } 
}

私はMainActivity.javaから次の行を削除する場合：

sharedPreferences.edit().putBoolean("firstrun", false).commit();

を、それはすべてのエラーを表示しません。ここで何が間違っていますか？

完全なスタックトレース：

07-19 18:20:07.468 9082-9082/? D/dalvikvm: Late-enabling CheckJNI 
07-19 18:20:07.598 9082-9082/com.example.ankitshubham.ribbon D/FirebaseApp: com.google.firebase.auth.FirebaseAuth is not linked. Skipping initialization. 
07-19 18:20:07.598 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getNoBackupFilesDir, referenced from method com.google.android.gms.common.util.zzx.getNoBackupFilesDir 
07-19 18:20:07.598 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 382: Landroid/content/Context;.getNoBackupFilesDir()Ljava/io/File; 
07-19 18:20:07.598 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.618 9082-9082/com.example.ankitshubham.ribbon D/FirebaseApp: Initialized class com.google.firebase.iid.FirebaseInstanceId. 
07-19 18:20:07.618 9082-9082/com.example.ankitshubham.ribbon D/FirebaseApp: com.google.firebase.crash.FirebaseCrash is not linked. Skipping initialization. 
07-19 18:20:07.628 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.pm.PackageManager.getPackageInstaller, referenced from method com.google.android.gms.common.zze.zzk 
07-19 18:20:07.628 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 523: Landroid/content/pm/PackageManager;.getPackageInstaller()Landroid/content/pm/PackageInstaller; 
07-19 18:20:07.628 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x000b 
07-19 18:20:07.638 9082-9082/com.example.ankitshubham.ribbon I/FA: App measurement is starting up, version: 9080 
07-19 18:20:07.638 9082-9082/com.example.ankitshubham.ribbon I/FA: To enable debug logging run: adb shell setprop log.tag.FA VERBOSE 
07-19 18:20:07.638 9082-9082/com.example.ankitshubham.ribbon D/FA: Debug logging enabled 
07-19 18:20:07.638 9082-9082/com.example.ankitshubham.ribbon D/FA: AppMeasurement singleton hash: 1099921264 
07-19 18:20:07.688 9082-9082/com.example.ankitshubham.ribbon D/FirebaseApp: Initialized class com.google.android.gms.measurement.AppMeasurement. 
07-19 18:20:07.688 9082-9082/com.example.ankitshubham.ribbon I/FirebaseInitProvider: FirebaseApp initialization successful 
07-19 18:20:07.718 9082-9110/com.example.ankitshubham.ribbon D/dalvikvm: GC_FOR_ALLOC freed 334K, 13% free 2971K/3388K, paused 18ms, total 18ms 
07-19 18:20:07.728 9082-9110/com.example.ankitshubham.ribbon W/GooglePlayServicesUtil: Google Play services out of date. Requires 9080000 but found 4324034 
07-19 18:20:07.728 9082-9110/com.example.ankitshubham.ribbon D/FA: Service container out of date 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.view.Window$Callback.onProvideKeyboardShortcuts, referenced from method android.support.v7.view.WindowCallbackWrapper.onProvideKeyboardShortcuts 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve interface method 16355: Landroid/view/Window$Callback;.onProvideKeyboardShortcuts (Ljava/util/List;Landroid/view/Menu;I)V 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to find class referenced in signature (Landroid/view/SearchEvent;) 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.view.Window$Callback.onSearchRequested, referenced from method android.support.v7.view.WindowCallbackWrapper.onSearchRequested 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve interface method 16357: Landroid/view/Window$Callback;.onSearchRequested (Landroid/view/SearchEvent;)Z 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.view.Window$Callback.onWindowStartingActionMode, referenced from method android.support.v7.view.WindowCallbackWrapper.onWindowStartingActionMode 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve interface method 16361: Landroid/view/Window$Callback;.onWindowStartingActionMode (Landroid/view/ActionMode$Callback;I)Landroid/view/ActionMode; 
07-19 18:20:07.728 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x72 at 0x0002 
07-19 18:20:07.738 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.res.TypedArray.getChangingConfigurations, referenced from method android.support.v7.widget.TintTypedArray.getChangingConfigurations 
07-19 18:20:07.738 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 617: Landroid/content/res/TypedArray;.getChangingConfigurations()I 
07-19 18:20:07.738 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002 
07-19 18:20:07.738 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.res.TypedArray.getType, referenced from method android.support.v7.widget.TintTypedArray.getType 
07-19 18:20:07.738 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 639: Landroid/content/res/TypedArray;.getType (I)I 
07-19 18:20:07.738 9082-9110/com.example.ankitshubham.ribbon W/GooglePlayServicesUtil: Google Play services out of date. Requires 9080000 but found 4324034 
07-19 18:20:07.738 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0008 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.createDeviceProtectedStorageContext, referenced from method android.support.v4.content.ContextCompat.createDeviceProtectedStorageContext 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 363: Landroid/content/Context;.createDeviceProtectedStorageContext()Landroid/content/Context; 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getCodeCacheDir, referenced from method android.support.v4.content.ContextCompat.getCodeCacheDir 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 369: Landroid/content/Context;.getCodeCacheDir()Ljava/io/File; 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getColor, referenced from method android.support.v4.content.ContextCompat.getColor 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 370: Landroid/content/Context;.getColor (I)I 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getColorStateList, referenced from method android.support.v4.content.ContextCompat.getColorStateList 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 371: Landroid/content/Context;.getColorStateList (I)Landroid/content/res/ColorStateList; 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getDataDir, referenced from method android.support.v4.content.ContextCompat.getDataDir 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 373: Landroid/content/Context;.getDataDir()Ljava/io/File; 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getDrawable, referenced from method android.support.v4.content.ContextCompat.getDrawable 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 375: Landroid/content/Context;.getDrawable (I)Landroid/graphics/drawable/Drawable; 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getNoBackupFilesDir, referenced from method android.support.v4.content.ContextCompat.getNoBackupFilesDir 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 382: Landroid/content/Context;.getNoBackupFilesDir()Ljava/io/File; 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.isDeviceProtectedStorage, referenced from method android.support.v4.content.ContextCompat.isDeviceProtectedStorage 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 395: Landroid/content/Context;.isDeviceProtectedStorage()Z 
07-19 18:20:07.748 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.798 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.res.Resources.getDrawable, referenced from method android.support.v7.widget.ResourcesWrapper.getDrawable 
07-19 18:20:07.798 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 580: Landroid/content/res/Resources;.getDrawable (ILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable; 
07-19 18:20:07.798 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002 
07-19 18:20:07.798 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.res.Resources.getDrawableForDensity, referenced from method android.support.v7.widget.ResourcesWrapper.getDrawableForDensity 
07-19 18:20:07.798 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 582: Landroid/content/res/Resources;.getDrawableForDensity (IILandroid/content/res/Resources$Theme;)Landroid/graphics/drawable/Drawable; 
07-19 18:20:07.798 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0002 
07-19 18:20:07.808 9082-9082/com.example.ankitshubham.ribbon I/dalvikvm: Could not find method android.content.Context.getColorStateList, referenced from method android.support.v7.content.res.AppCompatResources.getColorStateList 
07-19 18:20:07.808 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve virtual method 371: Landroid/content/Context;.getColorStateList (I)Landroid/content/res/ColorStateList; 
07-19 18:20:07.808 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x6e at 0x0006 
07-19 18:20:07.828 9082-9082/com.example.ankitshubham.ribbon W/GooglePlayServicesUtil: Google Play services out of date. Requires 9080000 but found 4324034 
07-19 18:20:07.828 9082-9082/com.example.ankitshubham.ribbon I/DynamiteModule: Considering local module com.google.android.gms.firebase_database:2 and remote module com.google.android.gms.firebase_database:0 
07-19 18:20:07.828 9082-9082/com.example.ankitshubham.ribbon I/DynamiteModule: Selected local version of com.google.android.gms.firebase_database 
07-19 18:20:08.309 9082-9109/com.example.ankitshubham.ribbon D/dalvikvm: GC_FOR_ALLOC freed 308K, 12% free 3158K/3556K, paused 15ms, total 15ms 
07-19 18:20:08.399 9082-9082/com.example.ankitshubham.ribbon W/FA: Service connection failed: ConnectionResult{statusCode=SERVICE_VERSION_UPDATE_REQUIRED, resolution=null, message=null} 
07-19 18:20:08.439 9082-9082/com.example.ankitshubham.ribbon D/ION: config: version(0x10001) secure(0xf000) 256M(0x221) fast(0x608) hwwr(0x4) 
07-19 18:20:08.449 9082-9082/com.example.ankitshubham.ribbon I/MM_DEVICE: Waiting for mm thread to come up 
07-19 18:20:08.449 9082-9127/com.example.ankitshubham.ribbon I/MM_DEVICE: mm_device_thread starting 
07-19 18:20:08.449 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglCreateContext() config: 19 context: 0x548a2498, VC context 0, Thread 9082 
07-19 18:20:08.449 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglMakeCurrent(0x548a2498, 0x5489dc50, 0x5489dc50) Thread: 9082 
07-19 18:20:08.459 9082-9082/com.example.ankitshubham.ribbon D/OpenGLRenderer: Enabling debug mode 0 
07-19 18:20:08.489 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: DexOpt: couldn't find field Landroid/os/Message;.sendingUid 
07-19 18:20:08.489 9082-9082/com.example.ankitshubham.ribbon W/dalvikvm: VFY: unable to resolve instance field 132 
07-19 18:20:08.489 9082-9082/com.example.ankitshubham.ribbon D/dalvikvm: VFY: replacing opcode 0x52 at 0x0000 
07-19 18:20:09.940 9082-9128/com.example.ankitshubham.ribbon W/InstanceID/Rpc: Found 10009 
07-19 18:20:11.352 9082-9117/com.example.ankitshubham.ribbon D/dalvikvm: GC_FOR_ALLOC freed 453K, 15% free 3215K/3752K, paused 15ms, total 17ms 
07-19 18:20:11.382 9082-9128/com.example.ankitshubham.ribbon I/Updated token: c_p6z2MheZQ:APA91bFMfIpAyl_1SuCg3F2cG1cRLACtCgBSAtBnWY5sly-eypN-xGdh0jHBVa_EukERqYGUSFyuTYSSvypMXElWoFJ_6qNpjAWHrW7paNqiXMLp_VN2EwKdxTsFWttMMSImaETWFrLN 
07-19 18:20:11.382 9082-9128/com.example.ankitshubham.ribbon W/dalvikvm: threadid=15: thread exiting with uncaught exception (group=0x41610ba8) 
07-19 18:20:11.382 9082-9128/com.example.ankitshubham.ribbon E/AndroidRuntime: FATAL EXCEPTION: pool-4-thread-1 
                       Process: com.example.ankitshubham.ribbon, PID: 9082 
                       java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 
                        at android.os.Handler.<init>(Handler.java:200) 
                        at android.os.Handler.<init>(Handler.java:114) 
                        at android.widget.Toast$TN.<init>(Toast.java:327) 
                        at android.widget.Toast.<init>(Toast.java:92) 
                        at android.widget.Toast.makeText(Toast.java:241) 
                        at com.example.ankitshubham.ribbon.MyFirebaseInstanceIDService.onTokenRefresh(MyFirebaseInstanceIDService.java:18) 
                        at com.google.firebase.iid.FirebaseInstanceIdService.zza(Unknown Source) 
                        at com.google.firebase.iid.FirebaseInstanceIdService.zzm(Unknown Source) 
                        at com.google.firebase.iid.zzb$2.run(Unknown Source) 
                        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112) 
                        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587) 
                        at java.lang.Thread.run(Thread.java:841) 
07-19 18:20:11.542 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 9082 
07-19 18:20:11.542 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglDestroySurface() surface: 0x5489dc50, android window 0x548a0378, Thread: 9082 
07-19 18:20:11.992 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglMakeCurrent(0x548a2498, 0x55611c90, 0x55611c90) Thread: 9082 
07-19 18:20:12.002 9082-9082/com.example.ankitshubham.ribbon D/FirebaseApp: Notifying background state change listeners. 
07-19 18:20:12.002 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 9082 
07-19 18:20:12.002 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglMakeCurrent(0x548a2498, 0x55611c90, 0x55611c90) Thread: 9082 
07-19 18:20:12.002 9082-9082/com.example.ankitshubham.ribbon D/HAWAII_EGL: eglMakeCurrent(NULL) Thread: 9082 
07-19 18:21:07.747 9082-9886/com.example.ankitshubham.ribbon W/FA: Tasks have been queued for a long time 
07-19 18:25:11.434 9082-9128/? I/Process: Sending signal. PID: 9082 SIG: 9

出典

2017-07-19 Ankit Shubham

投稿完了stacktraceください –

クラッシュは、メイン（UI）スレッドではないスレッドでトーストを作成する要求によって発生します。トーストを削除するonTokenRefresh()を変更します。

public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService { 
    @Override 
    public void onTokenRefresh() { 
     super.onTokenRefresh(); 
     Log.i("Updated token", FirebaseInstanceId.getInstance().getToken()); 
     // TOAST REMOVED  
    } 
}

あなたもインストールGoogle Playのサービスの非常に古いバージョンを持っているデバイスまたはエミュレーター上で実行されています。この警告は、そのの指標である：

W/GooglePlayServicesUtil: Google Play services out of date. Requires 9080000 but found 4324034

あなたが使用しているFirebaseのバージョンをサポートし、新しいバージョンを使用するデバイス/エミュレータを更新する必要があります。

警告メッセージは、Firebaseバージョン9.0.8でビルドしていることも示しています。それは約1歳です。現在のバージョンは11.0.2です。アップグレードを検討してください。

出典

2017-07-19 13:29:38

あなたのエラーがcom.google.firebase.auth.FirebaseAuth is not linked.を示しているように、あなたがFirebaseAuthオブジェクトをintializedていないことを意味します。したがって、次のコードを使用して問題を解決してください。

FirebaseAuth auth = FirebaseAuth.getInstance();

使用もAuthStateListenerこのようなあなたの接続の状態を取得します

FirebaseAuth.AuthStateListener authListener; 
authListener = new FirebaseAuth.AuthStateListener() { 
    @Override 
    public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) { 
     firebaseUser = firebaseAuth.getCurrentUser(); 
     if (firebaseUser != null) { 
      Log.d("TAG", "You are signed in Firebase!"); 
     } else { 
      Log.d("TAG", "You are not signed in Firebase!"); 
     } 
    } 
};

はそれがお役に立てば幸いです。

出典

2017-07-19 13:06:15

sharedpreferencesを編集するときにLooper.prepare（）を呼び出さなかったスレッド内でハンドラを作成できません。

答えて

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