CODEWITHSUNDEEP
androidandroid-ndk
user276648
user276648

Reputation: 6363

Using .so file in Android app

I have an .so file that I added to Android Studio 2.1.1. Everything is working well and I can call the method from the .so file. The only thing is that for it to work I need to call the native method from a very specific part in my app.

Eg the method name is Java_com_test_app_MainView_myMethod, and so I must call myMethod from a class called MainView in a package named com.test.app.

So if I rename MainView to SubView I get java.lang.UnsatisfiedLinkError: Native method not found: com.test.app.SubView.myMethod.

Is this supposed to work like this, or am I missing something?

Upvotes: 0

Views: 210

Answers (1)

Ankur Aggarwal
Ankur Aggarwal

Reputation: 2220

This is indeed supposed to work like this. JNI method names must mirror the JAVA method names in _ format.

From this doc, following rules must be observed:

Resolving Native Method Names

Dynamic linkers resolve entries based on their names. A native method name is concatenated from the following components:

  • a mangled fully-qualified class name
  • an underscore (“_”) separator
  • a mangled method name
  • for overloaded native methods, two underscores (“__”) followed by the mangled argument signature

Upvotes: 2

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