GetMethodID总是报错NoSuchMethodError,如下:
jni部分代码
void native_jni_call_java_function(JNIEnv *env, jobject obj) {
jclass cls = env->FindClass(CLASS_PATH);
jmethodID mid = env->GetMethodID(cls, "callback", "()V");
if (mid == NULL) {
return;
}
env->CallVoidMethod(obj, mid);
}
android部分代码:
class InstanceMethodCall {
native void jniCallJavaMethod();
void callback() {
Log.d("abc","call back from jni");
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
InstanceMethodCall instance = new InstanceMethodCall();
instance.jniCallJavaMethod();
}
但是如果我在调用jniCallJavaMethod之前加一行:
instance.callback(),之后再执行instance.jniCallJavaMethod();就正确了。这是为何?
困扰好久了!!!