在我的应用程序中,我将图像的路径存储在我的sqlite数据库中以供进一步使用.我得到的路径是
content://com.android.providers.media.documents/document/image%3A71964
当我从数据库中检索该路径并尝试从该路径中检索图像时,android throws
java.lang.SecurityException: Permission Denial: opening provider com.android.providers.media.MediaDocumentsProvider from ProcessRecord{42c84ec8 23911:com.gots.gb/u0a248} (pid=23911,uid=10248) requires android.permission.MANAGE_DOCUMENTS or android.permission.MANAGE_DOCUMENTS
根据https://developer.android.com/guide/topics/providers/document-provider.html#permissions我需要持续许可通过添加以下代码
final int takeFlags = intent.getFlags()
& (Intent.FLAG_GRANT_READ_URI_PERMISSION
| Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
// Check for the freshest data.
getContentResolver().takePersistableUriPermission(uri,takeFlags);
当我添加这个代码到我的ImageAdapter类,它扩展了BaseAdapter android throws
08-21 02:14:38.530: W/System.err(24452): java.lang.SecurityException: No permission grant found for UID 10248 and Uri content://com.android.providers.media.documents/document/image:71964
这是我的ImageAdapter代码的相关部分
public View getView(int position,View convertView,ViewGroup parent) {
ImageView imageView ;
if (convertView == null){
imageView = new ImageView(mContext);
imageView.setLayoutParams(new GridView.LayoutParams(185,185));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8,8,8);
}
else{
imageView = (ImageView)convertView ;
}
InputStream is = null;
Bitmap bitmap = null ;
try {
Log.d(TAG,String.valueOf(list.get(position)));
Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
final int takeFlags = intent.getFlags()
& (Intent.FLAG_GRANT_READ_URI_PERMISSION
| Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
// Check for the freshest data.
if (Build.VERSION.SDK_INT >= 19){
mContext.getContentResolver().takePersistableUriPermission(list.get(position),takeFlags);
}
is = mContext.getContentResolver().openInputStream(list.get(position));
final BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 8;
bitmap = BitmapFactory.decodeStream(is,null,options);
is.close();
imageView.setImageBitmap(bitmap);
return imageView;
}
catch (Exception e) {
e.printStackTrace();
return null;
}
我究竟做错了什么？
谢谢
解决方法
我相信我已经解决了.请求意图：
Intent intent;
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE,true);
intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
}else{
intent = new Intent(Intent.ACTION_GET_CONTENT);
}
intent.putExtra(Intent.EXTRA_LOCAL_ONLY,true);
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.setType("image/*");
startActivityForResult(Intent.createChooser(intent,getResources().getString(R.string.form_pick_photos)),REQUEST_PICK_PHOTO);
和onActivityResult
...
// kitkat fixed (broke) content access; to keep the URIs valid over restarts need to persist access permission
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
final int takeFlags = data.getFlags() & Intent.FLAG_GRANT_READ_URI_PERMISSION;
ContentResolver resolver = getActivity().getContentResolver();
for (Uri uri : images) {
resolver.takePersistableUriPermission(uri,takeFlags);
}
}
...
我没有测试过这个pre-kitkat,我的手机正在运行5.1,任何人都可以在旧的手机上验证这个？
