动态检索NativeActivity的变量和参数值

public class MainActivity extends NativeActivity {
    static {
        System.loadLibrary("native-lib");
    }

    public native void retrieveVariablesAndParameters(NativeActivity activity);
    
    // ...
}

JNIEXPORT void JNICALL Java_com_example_MainActivity_retrieveVariablesAndParameters(JNIEnv* env, jobject obj, jobject activity) {
    jclass clazz = env->GetObjectClass(activity);
    
    // 获取变量的值
    jfieldID variableField = env->GetFieldID(clazz, "variableName", "variableType");
    variableType variableValue = env->GetVariableTypeField(activity, variableField);
    
    // 获取参数的值
    jmethodID method = env->GetMethodID(clazz, "methodName", "(parameterType)parameterReturnType");
    parameterReturnType parameterValue = env->CallparameterReturnTypeMethod(activity, method, parameterValue);
    
    // ...
}