java-拒绝权限:MediaDocumentsProvider
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内容图文
尝试显示URI时出现以下异常.我认为这是在我的活动停止后发生的,我尝试再次访问可行的URI.还有其他问题可以解决这个问题,但是我对如何对我的代码应用任何解决方案感到非常困惑,因为我的takePhotoIntent允许拍照或从图库中选择图片(如下所示).
Unable to open content: content://com.android.providers.media.documents/document/image%3A49688
java.lang.SecurityException: Permission Denial: reading com.android.providers.media.MediaDocumentsProvider uri
content://com.android.providers.media.documents/document/image%3A49688 from pid=821, uid=10238 requires android.permission.MANAGE_DOCUMENTS, or grantUriPermission()
我的createImageFile和我的takePhotoIntent:
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp;
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
private void dispatchTakePictureIntent() {
for(int i = 0; i < 4; i++) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
// Create the File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
outputFileUri = Uri.fromFile(photoFile);
} catch (IOException ex) {
Log.w("error","IOException");
}catch (NullPointerException nullEx) {
Log.w("error","NullPointerException");
}
// Camera.
final List<Intent> cameraIntents = new ArrayList<Intent>();
final Intent captureIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
final PackageManager packageManager = getPackageManager();
final List<ResolveInfo> listCam = packageManager.queryIntentActivities(captureIntent, 0);
for (ResolveInfo res : listCam) {
final String packageName = res.activityInfo.packageName;
final Intent intent = new Intent(captureIntent);
intent.setComponent(new ComponentName(res.activityInfo.packageName, res.activityInfo.name));
intent.setPackage(packageName);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
cameraIntents.add(intent);
}
// Filesystem.
final Intent galleryIntent = new Intent();
galleryIntent.setType("image/*");
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
// Chooser of filesystem options.
final Intent chooserIntent = Intent.createChooser(galleryIntent, "Select Source");
// Add the camera options.
chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, cameraIntents.toArray(new Parcelable[cameraIntents.size()]));
if(id.equals(HAPPY_ID))
startActivityForResult(chooserIntent, REQUEST_HAPPY_PHOTO);
if(id.equals(SURPRISED_ID))
startActivityForResult(chooserIntent, REQUEST_SURPRISED_PHOTO);
if(id.equals(AFRAID_ID))
startActivityForResult(chooserIntent, REQUEST_AFRAID_PHOTO);
if(id.equals(UPSET_ID))
startActivityForResult(chooserIntent, REQUEST_UPSET_PHOTO);
if(id.equals(SAD_ID))
startActivityForResult(chooserIntent, REQUEST_SAD_PHOTO);
}
}
}
解决方法:
每Storage Access Framework client documentation:
Use 07001 if you want your app to simply read/import data. With this approach, the app imports a copy of the data, such as an image file.
Use 07002 if you want your app to have long term, persistent access to documents owned by a document provider. An example would be a photo-editing app that lets users edit images stored in a document provider.
当您使用ACTION_GET_CONTENT时,销毁组件时对Uri的访问将结束(除非您将Uri传递给新组件).如果您想在组件的有效期内继续访问它,则必须从Uri复制该文件,或者切换到ACTION_OPEN_DOCUMENT和persist permissions(仅适用于Uris文档).
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