How to transfer files between Android applications running on the same device?

Question

I am writing an Android application that interfaces with a RESTful service. This web service essentially fronts a file system, and provides metadata as well CRUD access to the

Answer 1

http://developer.android.com/reference/android/os/ParcelFileDescriptor.html can be sent between processes. I believe that there is a subtly where these are explicitly blacklisted from being allowed to be put in intents. They can be sent through AIDL though. Also, do NOT use the sdcard for this. This is just asking for trouble. One sdcard is world readable, so anyone can see it. Also, you do not always have access to write to the sdcard (it is removed or put in UMS).