I need an exception handling implemented in JNI code. I am not good at jni and can't find any good example. So, please provide full example for this.
This is what I am doing:
jint JNI_OnLoad(JavaVM* vm, void* reserved) { jint result = -1; g_JavaVM = vm; if (vm->GetEnv((void **) &envLocal, JNI_VERSION_1_6) != JNI_OK) { return -1; } jclass clazz; **clazz = envLocal->FindClass("com/graphics/myclass/MyClass");** if (clazz == NULL) __android_log_print(ANDROID_LOG_ERROR, "MyClass", "clazz value is null"); g_clazz = (jclass) envLocal->NewGlobalRef(clazz); // STEP 3/3 : Delete the no longer needed local reference envLocal->DeleteLocalRef(clazz); result = JNI_VERSION_1_6; return result; } Now I have a need where if this MyClass is not available (because app developer does not have corresponding jar file) then, there should not be any app crash. JNI_OnLoad will be called when loading a library using System.LoadLibrary("libmyclass.so") and this "com/graphics/myclass/MyClass" class.
Currently, if this jar is not included in the app this causes and app to crash with below exception
F/art (14708): sart/runtime/check_jni.cc:65] JNI DETECTED ERROR IN APPLICATION: JNI NewGlobalRef called with pending exception 'java.lang.ClassNotFoundException' thrown in unknown throw location F/art (14708): sart/runtime/check_jni.cc:65] in call to NewGlobalRef F/art (14708): sart/runtime/check_jni.cc:65] from java.lang.String java.lang.Runtime.nativeLoad(java.lang.String, java.lang.ClassLoader, java.lang.String) F/art (14708): sart/runtime/check_jni.cc:65] "main" prio=5 tid=1 Runnable What I need is rather this exception handled by android somewhere, it should be handled in JNI_OnLoad so that app does not crash. I don't want exception handling by java.
so my thinking is if I catch exception thrown by " clazz = envLocal->FindClass("com/graphics/systemOp/SystemOp");" be handled in JNI_OnLoad after this.
Can someone suggest an example (complete one) because I can't implement it. With full source code please. Ask me if you need more information.