android - How to ensure URI Permission is correct when opening file? -

i have file content provider , given other applications open file.

androidmainfest.xml:

<provider         android:name="com.sap.mcm.android.content.filecontentprovider"         android:authorities="com.sap.mcm.android.provider"         android:exported="true"         android:granturipermissions="true"         <grant-uri-permission android:pathpattern="/unencrypted/" />     </provider> 

by adding code assume applications has uri permissions can access file content provider open file.

1. is assumption right?
2. in manner secured interms of attacking vulnerable content providers?
3. how test ensure there no security threat using above code?

correct way of exporting provider uri permission

androidmainfest.xml:

  <provider android:name="com.sap.mcm.android.content.filecontentprovider"     android:authorities="com.sap.mcm.android.provider"          android:exported="false"  android:granturipermissions="true </provider>  

open file intent should set below flag intent.setflags(intent.flag_grant_read_uri_permission);