File created in NDK - How to access that from UI app?

[SathishKumar Mani]

Hi,

I would like to do the following, please advice the best solution

- In my native library I will be creating files. File location is /data/data/com.example.remote_service/files/test.txt. (I am able to do that. No issues)

- I want the UI app running in a different process to access these files created by my Native library.( I am having trouble here)

I am not sure what permissions I have to explicitly set so that my UI app can directly access this file using JAVA api's.

I tried using openFileInput() with the absolute path and I got an error and after reading the documentation noticed that I cannot use absolute path for openFileInput().

Is ContentProvider the only option for me or are there any other way to access these files from the UI App.

Appreciate any solution/pointers...

Thanks

Sathish

[Dianne Hackborn]

(1) Please use the Context APIs to get the path at which you should store files.  In the future there WILL BE different base paths where data can go, so you don't want to hard-code this.

(2) Now that you are using the Context APIs, you can also use them to access the files from Java.

(3) If your code is all in the same .apk, it can all access the same files, regardless of what process it runs under.  All of the processes will be running as the same uid, and thus have permission to access the same files.

(4) If this code is running in different .apks, they will typically have different uids, so simply can't directly access each others' files.  This is where content providers come in, or sharedUserId as a brute force solution.

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