相机意图权限，android，为什么这不起作用？

问题描述：

<uses-permission android:name="android.permission.INTERNET" /> 
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> 
<uses-permission android:name="android.permission.CAMERA"/> 
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

和

CODE

mCameraButton.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      if (ActivityCompat.checkSelfPermission(getActivity(), 
        Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { 
       requestPermissions(new String[]{android.Manifest.permission.READ_EXTERNAL_STORAGE}, 1000); 
      } else { 
       startCameraActivity(); 
      } 
     } 
    }); 

public void startCameraActivity() { 
    Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
    if (cameraIntent.resolveActivity(getActivity().getPackageManager()) != null) { 
     startActivityForResult(cameraIntent, 1000); 
    } 
} 
@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (resultCode == Activity.RESULT_OK) { 
     if (requestCode == 1000) { 
      first_getUri = data.getData(); 
      Bitmap bitmap = null; 
      try { 
       bitmap = getBitmapFromUri(first_getUri); 
      } catch (IOException e) { 
      } 

      File imageFile = null; 
      try { 
       imageFile = createFileFromBitmap(bitmap); 
      } catch (IOException e) { 
      } 
      returnUri = Uri.fromFile(imageFile); 
     } 

     Glide.with(this) 
       .load(returnUri) 
       .override(1280, 1280) 
       .into(mImageview); 
    } 
}

使用的权限而这是其他方法（可以忽略）

private Bitmap getBitmapFromUri(Uri uri) throws IOException { 
    ParcelFileDescriptor parcelFileDescriptor = 
      getActivity().getContentResolver().openFileDescriptor(uri, "r"); 
    FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor(); 

    BitmapFactory.Options opts = new BitmapFactory.Options(); 
    opts.inJustDecodeBounds = true; 
    BitmapFactory.decodeFileDescriptor(fileDescriptor, null, opts); 

    int width = opts.outWidth; 
    int height = opts.outHeight; 

    float sampleRatio = getSampleRatio(width, height); 

    opts.inJustDecodeBounds = false; 
    opts.inSampleSize = (int) sampleRatio; 

    Bitmap resizedBitmap = BitmapFactory.decodeFileDescriptor(fileDescriptor, null, opts); 
    Log.d("Resizing", "Resized Width/Height : " + resizedBitmap.getWidth() + "/" + resizedBitmap.getHeight()); 
    parcelFileDescriptor.close(); 
    return resizedBitmap; 
} 

private float getSampleRatio(int width, int height) { 

    final int targetWidth = 1280; 
    final int targetheight = 1280; 

    float ratio; 

    if (width > height) { 
     // Landscape 
     if (width > targetWidth) { 
      ratio = (float) width/(float) targetWidth; 
     } else ratio = 1f; 
    } else { 
     // Portrait 
     if (height > targetheight) { 
      ratio = (float) height/(float) targetheight; 
     } else ratio = 1f; 
    } 
    return Math.round(ratio); 
} 

private File createFileFromBitmap(Bitmap bitmap) throws IOException { 
    File newFile = new File(getActivity().getFilesDir(), makeImageFileName()); 
    FileOutputStream fileOutputStream = new FileOutputStream(newFile); 
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream); 
    fileOutputStream.close(); 
    return newFile; 
} 

private String makeImageFileName() { 

    SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMdd_hhmmss"); 
    Date date = new Date(); 
    String strDate = simpleDateFormat.format(date); 
    return strDate + ".png"; 
}

这CODE运作良好时，代码是获取图像从画廊这样

private void startGallery() { 
    Intent cameraIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
    cameraIntent.setType("image/*"); 
    if (cameraIntent.resolveActivity(getActivity().getPackageManager()) != null) { 
     startActivityForResult(cameraIntent, 2000); 
    } 
}

所以，我认为问题出在Android的许可。

代码工作顺利进行或等于安卓5.XX

但不要超过或等于适用于Android 6.XX

问：是否有失败的代码，我错过了任何许可？

Android权限太难理解了您是否让我知道如何修改此CODE？

编辑

不工作的手段：如果我点击mCameraButton，不会发生任何事情。没有什么事发生。

请详细解释，**详细说明**，什么“不工作”的意思。另外，'ACTION_IMAGE_CAPTURE'不会返回'Uri'。 – CommonsWare

您必须为Android 6.0及更高版本添加“运行时权限”。 –

@CommonsWare我加了。 '不行'意味着什么都没有发生。 –

答

所以，我认为问题是在android权限。

代码工作顺利进行或等于安卓5.XX

但不要过分适用于或等于安卓6.XX

对于这一点，你必须添加权限运行在Android 6.0及以上。

例子。

final private int REQUEST_CODE_ASK_PERMISSIONS_CAMERA = 100; 
final private int REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE = 200; 

// For Check Camera Permission 
if (Build.VERSION.SDK_INT >= 23) { 
      int hasPermission = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.CAMERA); 
      if (hasPermission != PackageManager.PERMISSION_GRANTED) { 
       if (shouldShowRequestPermissionRationale(Manifest.permission.CAMERA)) { 
        // Display UI and wait for user interaction 
        getErrorDialog("You need to allow Camera permission." + 
          "\nIf you disable this permission, You will not able to add attachment.", getActivity(), true).show(); 
       } else { 
        requestPermissions(new String[]{Manifest.permission.CAMERA}, REQUEST_CODE_ASK_PERMISSIONS_CAMERA); 
       } 
       return; 
      } 
     } 

// For Check Read External Permission. 
if (Build.VERSION.SDK_INT >= 23) { 
      int hasPermission = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.READ_EXTERNAL_STORAGE); 
      if (hasPermission != PackageManager.PERMISSION_GRANTED) { 
       if (shouldShowRequestPermissionRationale(Manifest.permission.READ_EXTERNAL_STORAGE)) { 
        // Display UI and wait for user interaction 
        getErrorDialog("You need to allow Read External Storage permission." + 
          "\nIf you disable this permission, You will not able to add attachment.", getActivity(), false).show(); 
       } else { 
        requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE); 
       } 
       return; 
      } 
     } 

@Override 
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { 
     switch (requestCode) { 
      case REQUEST_CODE_ASK_PERMISSIONS_CAMERA: 
       if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        // Permission Granted 
        Toast.makeText(getActivity(), "Permission Grant", Toast.LENGTH_SHORT).show(); 
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); 
        String imageFileName = "JPEG_" + timeStamp + ".jpg"; 
        File imageStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM), imageFileName); 
        uri = Uri.fromFile(imageStorageDir); 
        intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); 
        startActivityForResult(intent, 1); 

       } else { 
        // Permission Denied 
        Toast.makeText(getActivity(), "Required permission is disable.", Toast.LENGTH_SHORT).show(); 
       } 
       break; 

      case REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE: 
       if (grantResults[0] == PackageManager.PERMISSION_GRANTED) { 
        // Permission Granted 
        Toast.makeText(getActivity(), "Permission Grant", Toast.LENGTH_SHORT).show(); 
        Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
        intent.setType("image/*"); 
        startActivityForResult(intent, 2); 

       } else { 
        // Permission Denied 
        Toast.makeText(getActivity(), "Required permission is disable.", Toast.LENGTH_SHORT).show(); 
       } 
       break; 

      default: 
       super.onRequestPermissionsResult(requestCode, permissions, grantResults); 
     } 
    } 

public AlertDialog.Builder getErrorDialog(String message, Context context, final boolean isFromCamera) { 
     final AlertDialog.Builder alertDialog = new AlertDialog.Builder(context); 
     alertDialog.setTitle(getString(R.string.app_name)).setMessage(message); 
     alertDialog.setPositiveButton("Ok", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 

       dialog.dismiss(); 
       if (Build.VERSION.SDK_INT >= 23) { 
        if(isFromCamera){ 
         requestPermissions(new String[]{Manifest.permission.CAMERA}, 
           REQUEST_CODE_ASK_PERMISSIONS_CAMERA); 
        }else { 
         requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 
           REQUEST_CODE_ASK_PERMISSIONS_EXTERNAL_STORAGE); 
        } 
       } 

      } 
     }); 
     return alertDialog; 
    }

谢谢你的亲切答案Chirag Savsani –

欢迎兄弟。 –

答

从Android Marshmellow Android生态系统开始要求开发商在运行时获得一定的权限，这意味着他们应该明确地询问用户权限被授予。你可以阅读更多here。

但我明白，要求这些权限需要写很多样板代码才能变得令人望而生畏。所以我建议你使用第三方库。我的最爱是Let。 Let大大减少了使用运行时权限所需的样板。

感谢您的回答Hamed Momeni –

答

请求运行时权限很容易理解。请在运行时查看Android官方请求权限。

Check it out here

感谢您的回答Akshay Soni –

相机意图权限，android，为什么这不起作用？

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