ZBarFragment를 사용하여 널 포인터 예외가 발생했습니다.

Question

이전에 프로젝트에 ZxingFragment를 사용했지만 작동했지만 카메라 방향이 잘못되었습니다. 그래서 지금 나는 Zbar를 시도하고있다. ZbarFragment 라이브러리를 사용하고 있습니다. 하지만 문제는 Nullpointerexception을 얻고 있으며 디버그 값에서 스캐너 클래스의 일부 변수가 null 인 것으로 보입니다. 내가 도대체 ​​뭘 잘못하고있는 겁니까?

public class ScanFragment extends Fragment implements ZBarFragment.ResultListener { 

    private static final int ZBAR_SCANNER_REQUEST = 0; 
    private static final int ZBAR_QR_SCANNER_REQUEST = 1; 
    private static final String TAG = "ZBarFragment"; 
    private ZBarScanner scanner; 
    public ScanFragment(){} 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
     super.onCreateView(inflater, container, savedInstanceState); 
     View rootView = inflater.inflate(R.layout.fragment_scan, container, false); 
     FragmentManager fragmentManager = getFragmentManager(); 
     ZBarFragment cameraFrag = new ZBarFragment(); 
     fragmentManager.beginTransaction() 
       .replace(R.id.sample, (Fragment)cameraFrag).commit(); 
     scanner = cameraFrag.getScanner(); 

     int[] modes = new int[] {ZBarConstants.CODE128, ZBarConstants.QRCODE}; 
     scanner.setModes(modes); 
     return rootView; 
    } 



    @Override 
    public void onResult(String result) { 
     Toast.makeText(getActivity(), result, Toast.LENGTH_LONG).show(); 

    } 
} 

에러 로그 :

09-22 00 : 10 : 14.538 : E가/AndroidRuntime (27,267) FATAL EXCEPTION : 10 : 14.538 : 09-22 00 주 E/AndroidRuntime (27,267) : 09-22 java.lang.NullPointerException이 00 : 10 : 14.538 : E/AndroidRuntime (27,267) com.trhura.android.zbar.scanner.ZBarFragment.setModes (ZBarFragment.java:105) 09 -22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : 에 com.example.devicerentalsystem.ScanFragment.onCreateView (ScanFragment.java:41) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : android.support.v4.app.Fragment.java:1478 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : android.support.v4.app.FragmentManagerImpl.moveToState (FragmentManager.java:927) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : android.support.v4.app .FragmentManagerImpl.moveToState (FragmentManager.java:1104) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : 에 android.support.v4.app.BackStackRecord.run (BackStackRecord.java:682) 09 -22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : android.support.v4.app.FragmentManagerImpl.execPendingActions (FragmentManager.java:1460) 09-22 00 : 10 : 14.538 : E/Andro idRuntime (27267) : android.support.v4.app.FragmentManagerImpl $ 1.run (FragmentManager.java:440) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : android.os.Handler .handleCallback (Handler.java:730) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : android.os.Handler.dispatchMessage (Handler.java:92) 09-22 00:10 : 14,538 : E/AndroidRuntime (27267) : android.os.Looper.loop (Looper.java:137) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : android.app.ActivityThread. main (ActivityThread.java:5103) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : 에서 java.lang.reflect.Method.invokeNative (기본 메소드) 09-22 00 : 10 : 14.538 : 전자/그리고 roidRuntime (27267) : java.lang.reflect.Method.invoke (Method.java:525) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : com.android.internal.os. ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:737) 09-22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : com.android.internal.os.ZygoteInit.main (ZygoteInit.java:553) 09 -22 00 : 10 : 14.538 : E/AndroidRuntime (27267) : dalvik.system.NativeStart.main (기본 방법)

Answer 1

넣어 시도 :.

fragmentManager fragmentManager = getActivity() getSupportF ragmentManager(); 대신

FragmentManager fragmentManager = getFragmentManager의

();