許可をリクエスト中にAndroidアプリ（Marshmallow）がクラッシュする

Question

SplashScreenでアプリの権限を取り消そうとしていますが、毎回クラッシュしています。私は、SLOは、SDKのバージョンが> = 23

SplashScreen.java私もその印刷活動変数といくつかの他の変数を見ることができるもの、私のログに

public class SplashScreen extends Activity { 

// Splash screen timer 
public static final String MyPREFERENCES = "MyPrefs"; 
SharedPreferences sharedpreferences; 
MediaPlayer ringtone; 
Context context; 
private static int SPLASH_TIME_OUT = 500; 
private Activity activity; 
private static final int PERMISSION_REQUEST_CODE = 1; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.splash_screen); 
    context = getApplicationContext(); 
    activity = this; 
    ConnectionDetector cd = new ConnectionDetector(getApplicationContext()); 
    Boolean isInternetPresent = cd.isConnectingToInternet(); 
    System.out.println(isInternetPresent); 
    if(isInternetPresent){ 
     new Handler().postDelayed(new Runnable() { 

      /* 
      * Showing splash screen with a timer. This will be useful when you 
      * want to show case your app logo/company 
      */ 

      public void run() { 

       // This method will be executed once the timer is over 
       // Start your app main activity 
       Intent i = new Intent(SplashScreen.this, MainActivity.class); 
       startActivity(i); 
       // close this activity 
       finish(); 
      } 
     }, SPLASH_TIME_OUT); 
     boolean granted=checkPermission(); 
     Log.d("Permission already there","---"+granted); 
     /*if(!granted){ 
      requestPermission(); 
     }*/ 
     if (Build.VERSION.SDK_INT >= 23) { 
      System.out.println("Build version is"+Build.VERSION.SDK_INT); 
      requestPermission(); 
     } 

    } 
    else{ 

     Toast.makeText(getApplicationContext(), "Not Connected to internet",Toast.LENGTH_SHORT).show(); 
     final AlertDialog.Builder builder = new AlertDialog.Builder(this); 
     builder.setMessage("No Internet Connection Available. Do you want to try again") 
     .setCancelable(false) 
     .setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog,int id) { 
       // if this button is clicked, close 
       // current activity 
       Boolean status = NetworkUtil.getConnectivityStatusString(getApplicationContext()); 
       if(status){ 
        Intent i = new Intent(getApplicationContext(), SplashScreen.class); 
        i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
        startActivity(i); 
       } 
       else{ 
        // create alert dialog 
        AlertDialog alertDialog = builder.create(); 

        // show it 
        alertDialog.show(); 
       } 
      } 
     }) 
     .setNegativeButton("No", new DialogInterface.OnClickListener() { 
      public void onClick(DialogInterface dialog, int id) { 
       // Action for 'NO' Button 
       finish();  
      } 
     }); 

     //Creating dialog box 
     AlertDialog alert = builder.create(); 
     //Setting the title manually 
     alert.setTitle("No Internet"); 
     alert.show(); 

    } 
} 
private boolean checkPermission(){ 
    int result = ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.ACCESS_FINE_LOCATION)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.MODIFY_AUDIO_SETTINGS)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.RECORD_AUDIO)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.CAPTURE_AUDIO_OUTPUT)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.DISABLE_KEYGUARD)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.WAKE_LOCK)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.CAPTURE_VIDEO_OUTPUT)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.CALL_PHONE)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.CAMERA)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.CAPTURE_SECURE_VIDEO_OUTPUT)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.ACCESS_NETWORK_STATE)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.VIBRATE)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.GET_ACCOUNTS)+ 
      ContextCompat.checkSelfPermission(SplashScreen.this, Manifest.permission.READ_CONTACTS) 

      ; 
    if (result == PackageManager.PERMISSION_GRANTED){ 
     System.out.println("Returning true"); 
     return true; 
    } else { 
     System.out.println("Returning false"); 
     return false; 
    } 
} 
private void requestPermission(){ 
    Log.d("requestPermission ","Inside requestPermission"); 
    Log.d("activity ",activity+""); 
    Log.d("activity ",Manifest.permission.ACCESS_FINE_LOCATION+""); 
    if (ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.ACCESS_FINE_LOCATION)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.MODIFY_AUDIO_SETTINGS)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.RECORD_AUDIO)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.CAPTURE_AUDIO_OUTPUT)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.DISABLE_KEYGUARD)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.WAKE_LOCK)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.CAPTURE_VIDEO_OUTPUT)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.CALL_PHONE)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.CAMERA)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.CAPTURE_SECURE_VIDEO_OUTPUT)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.ACCESS_NETWORK_STATE)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.WRITE_EXTERNAL_STORAGE)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.READ_CONTACTS)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.GET_ACCOUNTS)&& 
      ActivityCompat.shouldShowRequestPermissionRationale(activity,Manifest.permission.VIBRATE)){ 
     Log.d("requestPermission","Inside if requestPermission"); 

    } else { 
     Log.d("requestPermission","Inside else of requestPermission"); 
     ActivityCompat.requestPermissions(activity,new String[]{Manifest.permission.ACCESS_FINE_LOCATION, 
       Manifest.permission.MODIFY_AUDIO_SETTINGS, 
       Manifest.permission.RECORD_AUDIO, 
       Manifest.permission.CAPTURE_AUDIO_OUTPUT, 
       Manifest.permission.DISABLE_KEYGUARD, 
       Manifest.permission.WAKE_LOCK, 
       Manifest.permission.CAPTURE_VIDEO_OUTPUT, 
       Manifest.permission.CALL_PHONE, 
       Manifest.permission.CAMERA, 
       Manifest.permission.CAPTURE_SECURE_VIDEO_OUTPUT, 
       Manifest.permission.ACCESS_NETWORK_STATE, 
       Manifest.permission.WRITE_EXTERNAL_STORAGE, 
       Manifest.permission.READ_CONTACTS, 
       Manifest.permission.GET_ACCOUNTS, 
       Manifest.permission.VIBRATE, 
      },PERMISSION_REQUEST_CODE); 
    } 
} 
@Override 
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) { 
    switch (requestCode) { 
    case PERMISSION_REQUEST_CODE: 
     if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { 

      // Snackbar.make(view,"Permission Granted, Now you can access location data.",Snackbar.LENGTH_LONG).show(); 
      Toast.makeText(context, "Permission Granted, Now you can access location data.", Toast.LENGTH_LONG).show(); 
     } else { 

      // Snackbar.make(view,"Permission Denied, You cannot access location data.",Snackbar.LENGTH_LONG).show(); 
      Toast.makeText(context, "Permission Denied, You cannot access location data.", Toast.LENGTH_LONG).show(); 
     } 
     break; 
    } 
} 


} 

あるかどうかを確認するために私のonCreateにチェック入れています。どの変数がnullになっているのか分かりません。 logs.txt

10-19 15:25:40.282: I/System.out(15747): Returning false 
10-19 15:25:40.282: D/Permission already there(15747): ---false 
10-19 15:25:40.282: D/requestPermission(15747): Inside requestPermission 
10-19 15:25:40.282: D/AndroidRuntime(15747): Shutting down VM 
10-19 15:25:40.293: E/AndroidRuntime(15747): FATAL EXCEPTION: main 
10-19 15:25:40.293: E/AndroidRuntime(15747): Process: com.example, PID: 15747 
10-19 15:25:40.293: E/AndroidRuntime(15747): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example/com.example.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.app.Activity.shouldShowRequestPermissionRationale(java.lang.String)' on a null object reference 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2426) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.app.ActivityThread.-wrap11(ActivityThread.java) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.os.Handler.dispatchMessage(Handler.java:102) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.os.Looper.loop(Looper.java:148) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.app.ActivityThread.main(ActivityThread.java:5443) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at java.lang.reflect.Method.invoke(Native Method) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
10-19 15:25:40.293: E/AndroidRuntime(15747): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean android.app.Activity.shouldShowRequestPermissionRationale(java.lang.String)' on a null object reference 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.support.v4.app.ActivityCompatApi23.shouldShowRequestPermissionRationale(ActivityCompat23.java:37) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at android.support.v4.app.ActivityCompat.shouldShowRequestPermissionRationale(ActivityCompat.java:363) 
10-19 15:25:40.293: E/AndroidRuntime(15747): at com.example.MainActivity.requestPermission(MainActivity.java:140) 

Answer 1

はSplashActivity開始時ではない、要求の権限に試してみてください。 MainActivityが既に起動しているときにリクエストしてください。私はあなたの問題がSplashActivityを完了する前に、アプリケーションが（遅延ハンドラで次のアクティビティを開始するときに）アクセス許可に関連するすべてのコードを実行することができると考えています。