Android build: No implementation found for int com.zerotier.sockets.ZeroTierNative.zts_init()

[zhaoqp]

there is no zts_init() in libzt.so
but in ZeroTierNative.java, there is a call to zts_init().

    if (zts_init() != ZeroTierNative.ZTS_ERR_OK) {
        throw new ExceptionInInitializerError("JNI init() failed (see GetJavaVM())");
    }

Please help~

[joseph-henry]

Hmm, it's there. Welcome to the wonderful world of Java JNI: https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/design.html

Can you paste the full build log?

[zhaoqp]

: )
Here's the build log and aar:
dist.zip

Hmm, it's there. Welcome to the wonderful world of Java JNI: https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/design.html

Can you paste the full build log?

[zhaoqp]

My Java code:

val node = ZeroTierNode()
node.start()

and then Exception was thrown:

java.lang.UnsatisfiedLinkError: No implementation found for int com.zerotier.sockets.ZeroTierNative.zts_init()
(tried Java_com_zerotier_sockets_ZeroTierNative_zts_1init and Java_com_zerotier_sockets_ZeroTierNative_zts_1init__)

[zhaoqp]

Hmm, it's there. Welcome to the wonderful world of Java JNI: https://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/design.html

Can you paste the full build log?

Hi Joe, have you got a chance to look into this? thanks

[tejas238]

@zhaoqp Have you managed to solve this? I'm having the same error but I'm unable to look into libzt.so in the .aar to see if the method is present. I wonder if there is a linking problem between the native C++ and the java. Sadly, I'm not good enough at CMake to find if there's a misconfiguration. I'm using the latest libzt release 1.8.10.

[tejas238]

@zhaoqp @joseph-henry created #201 to address this- ./build.sh android-aar with latest gradle and cmake versions is now building correctly. It looked like the .cxx interface update to the Java JNI build was missing for android which was included in CMakeLists.txt.