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Fix logger on android #15
Description
Logger doesn't work on android.
A/.rocandroidsin: java_vm_ext.cc:570] JNI DETECTED ERROR IN APPLICATION: JNI GetStaticFieldID called with pending exception java.lang.ClassNotFoundException: Didn't find class "com.github.rocproject.roc.LogLevel" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/system/lib64, /system/product/lib64, /system/lib64, /system/product/lib64]]
java_vm_ext.cc:570] at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:196)
java_vm_ext.cc:570] at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
java_vm_ext.cc:570] at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
java_vm_ext.cc:570]
java_vm_ext.cc:570] in call to GetStaticFieldID
A/.rocandroidsin: thread.cc:2348] No pending exception expected: java.lang.ClassNotFoundException: Didn't find class "com.github.rocproject.roc.LogLevel" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/system/lib64, /system/product/lib64, /system/lib64, /system/product/lib64]]
thread.cc:2348] at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:196)
thread.cc:2348] at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:379)
thread.cc:2348] at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
thread.cc:2348]
This could help: https://developer.android.com/training/articles/perf-jni.html#faq:-why-didnt-findclass-find-my-class
Do your FindClass lookups once, in JNI_OnLoad, and cache the class references for later use. Any FindClass calls made as part of executing JNI_OnLoad will use the class loader associated with the function that called System.loadLibrary (this is a special rule, provided to make library initialization more convenient). If your app code is loading the library, FindClass will use the correct class loader.
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MatteoArella commentedon Jun 5, 2020
I've cached
LogLevelclass reference insideJNI_OnLoad👍