无法使用Android-FilePicker使用Dropbox中的文件

Question

我正在使用来自Github（FilePicker）的该库，但无法从Dropbox中获取我选择的文件。它向我显示此错误：

FATAL EXCEPTION: main         Process: ***, PID: 13537
   java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=235, result=-1, data=Intent { dat=content://com.dropbox.android.FileCache/filecache/a6ba6acb-77e1-4cf5-af0f-bac5647d3860 typ=application/pdf flg=0x3 }} to activity {***/droidninja.filepicker.FilePickerActivity}: java.lang.SecurityException: No persistable permission grants found for UID 10692 and Uri 0 @ content://com.dropbox.android.FileCache/filecache/a6ba6acb-77e1-4cf5-af0f-bac5647d3860
       at android.app.ActivityThread.deliverResults(ActivityThread.java:4284)
       at android.app.ActivityThread.handleSendResult(ActivityThread.java:4327)
       at android.app.ActivityThread.-wrap22(ActivityThread.java)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1624)
       at android.os.Handler.dispatchMessage(Handler.java:105)
       at android.os.Looper.loop(Looper.java:156)
       at android.app.ActivityThread.main(ActivityThread.java:6523)
       at java.lang.reflect.Method.invoke(Native Method)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)
    Caused by: java.lang.SecurityException: No persistable permission grants found for UID 10692 and Uri 0 @ content://com.dropbox.android.FileCache/filecache/a6ba6acb-77e1-4cf5-af0f-bac5647d3860
       at android.os.Parcel.readException(Parcel.java:1665)
       at android.os.Parcel.readException(Parcel.java:1618)
       at android.app.ActivityManagerProxy.takePersistableUriPermission(ActivityManagerNative.java:4856)
       at android.content.ContentResolver.takePersistableUriPermission(ContentResolver.java:1832)
       at droidninja.filepicker.FilePickerActivity.onActivityResult(FilePickerActivity.java:155)
       at android.app.Activity.dispatchActivityResult(Activity.java:7188)
       at android.app.ActivityThread.deliverResults(ActivityThread.java:4280)
       at android.app.ActivityThread.handleSendResult(ActivityThread.java:4327) 
       at android.app.ActivityThread.-wrap22(ActivityThread.java) 
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1624) 
       at android.os.Handler.dispatchMessage(Handler.java:105) 
       at android.os.Looper.loop(Looper.java:156) 
       at android.app.ActivityThread.main(ActivityThread.java:6523) 
       at java.lang.reflect.Method.invoke(Native Method) 
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941) 
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831) 

有人可以帮我吗？