Android的運行權限（權限被拒絕）

Question

我不得不添加使用許可權，包括WRITE_EXTERNAL_STORAGE，android.permission.CAMERA，READ_EXTERNAL_STORAGE到AndroidManifest.xml中。

當我跑我的應用程序在Nexus6（API 24），它把我下面的錯誤：

java.io.IOException: Permission denied

這裏是我的代碼：

/** 
* A simple {@link Fragment} subclass. 
*/ 
public class HomeProfileFragment extends Fragment { 

    public static final int REQUEST_IMAGE_CAPTURE = 1; 

    private String imageFilePath; 

    public HomeProfileFragment() { 
     // Required empty public constructor 
    } 


    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     View view = inflater.inflate(R.layout.fragment_home_profile, container, false); 
     ///################# 
     String[] perms = {"android.permission.RECORD_AUDIO", "android.permission.CAMERA"}; 

     File imageFile = null; 
     try{ 
      String state = Environment.getExternalStorageState(); 
      if (Environment.MEDIA_MOUNTED.equals(state)) { 
       imageFile = createImageFile(); 
       imageFilePath = imageFile.getAbsolutePath(); 
      } else { 
       /// Throw an error 
      } 
     }catch (IOException e){ 
      e.printStackTrace(); 
     } 

     int permsRequestCode = 200; 

     requestPermissions(perms, permsRequestCode); 
     ///################# 


     if (imageFile != null){ 
      Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
      takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(imageFile)); 

      if(takePictureIntent.resolveActivity(getActivity().getPackageManager())!=null){ 
       startActivityForResult(takePictureIntent,REQUEST_IMAGE_CAPTURE); 

      } 
     } 
     return view; 
    } 

    ///################## 
    public void onRequestPermissionsResult(int permsRequestCode, String[] permissions, int[] grantResults){ 

     switch(permsRequestCode){ 

      case 200: 

       boolean audioAccepted = grantResults[0]== PackageManager.PERMISSION_GRANTED; 

       boolean cameraAccepted = grantResults[1]==PackageManager.PERMISSION_GRANTED; 

       break; 

     } 

    } 

    ///################## 

    private File createImageFile()throws IOException { 
     String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
     String fileName = "JPEG_" + timeStamp + "_"; 

     File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES); 

     File image = File.createTempFile(fileName, ".jpg", storageDir); 
     return image; 

    } 


    private void addPhotoToGallery(String filepath){ 
     Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); 
     File f = new File(filepath); 
     Uri uri =Uri.fromFile(f); 
     mediaScanIntent.setData(uri); 

     getActivity().sendBroadcast(mediaScanIntent); 

    } 

    @Override 
    public void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (requestCode == Activity.RESULT_CANCELED){ 
     } if (requestCode == Activity.RESULT_CANCELED){ 
      addPhotoToGallery(imageFilePath); 
     } 
    } 
    ///################################# 
    private boolean shouldAskPermission(){ 

     return(Build.VERSION.SDK_INT> Build.VERSION_CODES.LOLLIPOP_MR1); 

    } 
} 

如何使用權限相機運行打開之前？

Answer 1

您必須聲明，如果用戶權限在清單

<uses-feature android:name="android.hardware.camera2" /> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 

它必須在清單中，所以安裝程序可以讓用戶將這些權限授予應用程序。