Get the current(Java application) directory from native C lib.

[kris]

I developed mylib.so C-library. In  mylib.so I need to create some folders based on current working directory(I use getcwd() C-function).

When Somebody creates application SomeJavaApp(which uses mylib.so) mylib.so tries to create and use folders... but WHERE? Nowhere!
As fact, mylib.so needs to create folders somewhere like in /data/data/ru.android.some..../

The question is how to get this folder path(/data/data/ru.android.some) from mylib.so C-library, which knows nothing about SomeJavaApp at all?
Maybe there is specific android-API function or somthing else.
Is the question clear?

[RichardC]

Make it part of the initialization of your lib that the Java code using your lib has to pass in the paths to internal and external application storage.

See:

  Context.getDir

  Context.getExternalFilesDir

[kris]

You mean to put my folders(and my files) somewhere like ... /sdcard/myfolders/ and say to JavaApp to use the path /sdcard/myfolders?
Or I didn't understand you?


четверг, 28 июня 2012 г., 18:57:56 UTC+4 пользователь RichardC написал:

[kris]

Is the tricky way to get SomeJavaApp package name (ru.android.some.domain.app) from C-library mylib.so?
SomeJavaApp is the app, which is not my software but it uses mylib.so.

[RichardC]

On Thursday, June 28, 2012 4:29:30 PM UTC+1, kris wrote:

You mean to put my folders(and my files) somewhere like ... /sdcard/myfolders/ and say to JavaApp to use the path /sdcard/myfolders?
Or I didn't understand you?

No just define a method in your C lib that follows the Java native Jni calling convention that takes 2 string as parameters.  Then tell the people using your lib to call the method from their Java code and pass in the paths for internal and external storage.