Technical issues with map in Minecraft 1.2 Beta (PE) Hello.

Im writing some Android apps for Minecraft PE, which ones interacting with external map files (level DB entries), but after Beta 1.2 release i found a error when im trying to make some changes to map.
Basically, i got "java.nio.channels.OverlappingFileLockException".
It means what map file has been locked by Minecraft process.
In Java, i just cant unlock the file, which has been locked by another application.
So, is there any way to get access to a map?