Android.uid.system unable to read SD card information

[Android]android.uid.system cannot read SD card information [GO]

In the androidmanifest.xml we can see android:shareduserid= "Android.uid.system"
But with this sentence, the SD card can not read and write operations, such as the creation of a new folder in the SD card, is created unsuccessful.

However, if the android:shareduserid= "Android.uid.system" is commented out, you can do IO operation on the SD card.

In the settings android:shareduserid= "Android.uid.system" is indispensable, less of it a lot of settings under the application directly can not open, or a open error.