CODEWITHSUNDEEP
androidandroid-studiojava-native-interface
Edward Falk
Edward Falk

Reputation: 10063

Android Studio spurious "Cannot resolve corresponding JNI function"

Android Studio is showing this error. Here's a snippet of the relevant code:

public class MainActivity extends AppCompatActivity {

    ...

    static native void runTests(String path);

    static {
        System.loadLibrary("TestLib");
    }
}

In that first line, runTests is highlit in red and if you hover over it, you see the message "Cannot resolve corresponding JNI function"

To be clear, the app does build and run just fine. It's just that Android Studio thinks that this symbol can't be resolved.

Upvotes: 0

Views: 802

Answers (1)

Edward Falk
Edward Falk

Reputation: 10063

OK, I figured it out. If my function is defined using the standard naming convention, e.g.

extern "C"
JNIEXPORT void JNICALL
Java_com_example_myapplication_MainActivity_runTests(JNIEnv *env, jclass cls, jstring path)

Then Android Studio figures it out.

My problem was that I was just defining it as

static void
runTests(JNIEnv *env, jclass cls, jstring path)

and using env->RegisterNatives() to link it into Java. It was too much to ask of Android Studio to figure that out.

Upvotes: 2

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