Problems when run on cordova-android@7

[LucaTrip]

hi,
I'm trying to make the test project work with [email protected] but when I run on Android device, the test app starts but outputs only deviceready.
In the Android Studio Logcat this warn comes back:

Rejecting re-init on previously-failed class java.lang.Class<com.example.HelloCJni>: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/base.apk"],nativeLibraryDirectories=[/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/lib/arm64, /system/lib64, /system/vendor/lib64]]] couldn't find "libhelloc.so"
java.lang.NoClassDefFoundError: com.example.HelloCJni
at com.example.HelloCJni.calculate(Native Method)
at com.example.HelloCPlugin.execute(HelloCPlugin.java:35)
at org.apache.cordova.CordovaPlugin.execute(CordovaPlugin.java:98)
at org.apache.cordova.PluginManager.exec(PluginManager.java:132)
at org.apache.cordova.CordovaBridge.jsExec(CordovaBridge.java:59)
at org.apache.cordova.engine.SystemExposedJsApi.exec(SystemExposedJsApi.java:41)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:325)
at android.os.Looper.loop(Looper.java:142)
at android.os.HandlerThread.run(HandlerThread.java:65)
Caused by: java.lang.UnsatisfiedLinkError: dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/base.apk"],nativeLibraryDirectories=[/data/app/io.cordova.hellocordova-uUJEPTqhZpGH28gw-fLRPg==/lib/arm64, /system/lib64, /system/vendor/lib64]]] couldn't find "libhelloc.so"
at java.lang.Runtime.loadLibrary0(Runtime.java:1011)
at java.lang.System.loadLibrary(System.java:1657)
at com.example.HelloCJni.(HelloCJni.java:12)
at com.example.HelloCJni.getArch(Native Method)
at com.example.HelloCPlugin.execute(HelloCPlugin.java:28)

I do not know if this is the problem but before the support at cordova-android@7, the test app worked with cordova-platform@6.

Thanks

[dpa99c]

Looks like the shared object libraries didn't get deployed to the Android project.
Try updating you CLI to cordova@8.

[LucaTrip]

I updated the Cordova CLI to the latest version (8.1.2) and re-added the cordova-android@7 but the situation is the same.

[dpa99c]

OK, I'll take a look. Maybe the SO's are not getting deployed into the right place for cordova-android@7 since I updated the platform version...

[dpa99c]

The Android libs path has changed in cordova-android@7 - the above commit updates this plugin to use the new path so it should now run OK with cordova-android@7

[LucaTrip]

Yeah now work! Thank you!

[brody4hire]

I think this needs a major version increase (breaking change), right?

[dpa99c]

@brodybits yeah, in a "real" plugin it would - cordova-android@7 has caused some really breaking changes.

But since this one is just an example plugin and isn't published to npm, the semantic versioning is redundant so I won't bother here.

BTW nice idea though to workaround it by wrapping all the .so files in a .jar

[LucaTrip]

One more thing that is not clear to me. I would like to add my .c and .h files and the general flow would be:

• replace by adding the C source codes to src/common/
• adapt the HelloCPlugin.java and HelloCJni.java files
• and recompile the new libraries plugins/cordova-plugin-hello-c/compile-android
  It's correct?

[dpa99c]

yep, but if you're doing this with the plugin in-place inside an app project (i.e. myapp/plugins/cordova-plugin-hello-c), then you'll need to remove/re-add the platform to make the changes take effect:

cordova platform rm android --nosave && cordova platform add android --nosave

Otherwise, if your plugin lives outside of the your app directory, you can do:

cordova plugin rm cordova-plugin-hello-c --nosave && cordova plugin add /local/path/to/cordova-plugin-hello-c --nosave

[LucaTrip]

Okay thank you

[brody4hire]

I just raised apache/cordova-docs#902 to get this documented properly.

[brody4hire]

FYI I just raised apache/cordova-android#547 to deal with the large number of plugins not working on cordova-android@7.

[dpa99c]

@brodybits thanks, I have had compatibility problems reported against [email protected] which appears to make some breaking changes, e.g dpa99c/cordova-android-support-gradle-release#32 (comment)

I've worked around that particular issue (change in deployment location of Gradle files) in a new plugin version.

As for this example plugin, it's now the new version 18 of the Android NDK which is causing me issues - although I've updated the plugin to deploy the so files to the new location used by cordova-android@7 the C implementations of the JNI interface functions are not being found at runtime. Hopefully it's just a question of updating the C function signatures.