错误：未知类型名称"类对象"

我正试图用android本地代码替换android系统调用我的自定义方法，通过谷歌我发现了几个博客，但在尝试给定代码时我得到错误。

通过关注博客

我正在创建android Native方法使用以下代码从这个博客

#include "com_appwrapping_tunneling_SimpleActivity.h"
int Java_com_appwrapping_tunneling_SimpleActivity_swap_1virtual_1methods(char *origclass, char *origmeth, char *newclass, char *newmeth) {
  int i = 0;
  ClassObject *newclazz = g_dvmfindloadedclass(newclass);
  if (!newclazz) {
    return 0;
  }
  ClassObject *oldclazz = g_dvmfindclass(origclass, newclazz->classLoader);
  if (!oldclazz) {
    return 0;
  }
  struct Method *oldm = NULL, *newm = NULL;
  if (newclazz) {
    for (i = 0; i < newclazz->vtableCount; i++) {
        if(!strcmp(newclazz->vtable[i]->name, newmeth))
           // this is the new method
           newm = newclazz->vtable[i];
    }
  }
  if (oldclazz) {
    for (i = 0; i < oldclazz->vtableCount; i++) {
        if(!strcmp(oldclazz->vtable[i]->name, origmeth)) {
           // save old method
           oldm = oldclazz->vtable[i];
           // put new method in place of old
           oldclazz->vtable[i] = newm;
        }
    }
  }
  if (!newm || !oldm) {
    __android_log_print(ANDROID_LOG_ERROR, MYLOG_TAG, "failed to find methods/objects");
    return 0;
  }
  // add some space for original method
  oldclazz->vtable = g_dvmlinearrealloc(oldclazz->classLoader,
                      oldclazz->vtable,
                      sizeof(*(oldclazz->vtable)) * (oldclazz->vtableCount + 1));
  // we put it at the end of the table
  oldclazz->vtableCount++;
  oldclazz->vtable[oldclazz->vtableCount - 1] = oldm;
  // now new method gets old method name
  newm->name = oldm->name;
  char *fname = NULL;
  // leaking memory here
  fname = (char*) malloc(strlen(origmeth) + strlen(FAKE_PREFIX) + 1);
  sprintf(fname, "%s%s", FAKE_PREFIX, origmeth);
  // now old method will get _orig_ prefix, so it can be looked up later
  oldm->name = fname;
  // swap method indexes
  newm->methodIndex = oldm->methodIndex;
  // now old method gets proper index
  oldm->methodIndex = oldclazz->vtableCount - 1;
  g_dvmdumpclass(oldclazz, 1);
  g_dvmdumpclass(newclazz, 1);
  __android_log_write(ANDROID_LOG_DEBUG, MYLOG_TAG, "swap successful!");
  return 1;
}

一切正常，但在生成。so文件时使用以下命令:

<NDK-Home>$ ndk-build

我得到以下错误:

JNIApp/jni/testLib.c: In function 'swap_1virtual_1methods':
JNIApp/jni/testLib.c:6:3: error: unknown type name 'ClassObject'
JNIApp/jni/testLib.c:6:27: warning: initialization makes pointer from integer without a cast [enabled by default]
JNIApp/jni/testLib.c:10:3: error: unknown type name 'ClassObject'
JNIApp/jni/testLib.c:10:61: error: request for member 'classLoader' in something not a structure or union
JNIApp/jni/testLib.c:14:25: error: 'NULL' undeclared (first use in this function)
JNIApp/jni/testLib.c:14:25: note: each undeclared identifier is reported only once for each function it appears in
JNIApp/jni/testLib.c:16:29: error: request for member 'vtableCount' in something not a structure or union
JNIApp/jni/testLib.c:17:28: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:19:27: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:23:29: error: request for member 'vtableCount' in something not a structure or union
JNIApp/jni/testLib.c:24:28: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:26:27: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:28:20: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:33:25: error: 'ANDROID_LOG_ERROR' undeclared (first use in this function)
JNIApp/jni/testLib.c:33:44: error: 'MYLOG_TAG' undeclared (first use in this function)
JNIApp/jni/testLib.c:37:11: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:37:49: error: request for member 'classLoader' in something not a structure or union
JNIApp/jni/testLib.c:38:31: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:39:40: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:39:62: error: request for member 'vtableCount' in something not a structure or union
JNIApp/jni/testLib.c:41:11: error: request for member 'vtableCount' in something not a structure or union
JNIApp/jni/testLib.c:42:11: error: request for member 'vtable' in something not a structure or union
JNIApp/jni/testLib.c:42:28: error: request for member 'vtableCount' in something not a structure or union
JNIApp/jni/testLib.c:44:7: error: dereferencing pointer to incomplete type
JNIApp/jni/testLib.c:44:20: error: dereferencing pointer to incomplete type
JNIApp/jni/testLib.c:47:19: warning: incompatible implicit declaration of built-in function 'malloc' [enabled by default]
JNIApp/jni/testLib.c:47:26: warning: incompatible implicit declaration of built-in function 'strlen' [enabled by default]
JNIApp/jni/testLib.c:47:52: error: 'FAKE_PREFIX' undeclared (first use in this function)
JNIApp/jni/testLib.c:48:3: warning: incompatible implicit declaration of built-in function 'sprintf' [enabled by default]
JNIApp/jni/testLib.c:50:7: error: dereferencing pointer to incomplete type
JNIApp/jni/testLib.c:52:7: error: dereferencing pointer to incomplete type
JNIApp/jni/testLib.c:52:27: error: dereferencing pointer to incomplete type
JNIApp/jni/testLib.c:54:7: error: dereferencing pointer to incomplete type
JNIApp/jni/testLib.c:54:31: error: request for member 'vtableCount' in something not a structure or union
JNIApp/jni/testLib.c:57:23: error: 'ANDROID_LOG_DEBUG' undeclared (first use in this function)
make: *** [JNIApp/obj/local/armeabi-v7a/objs/testLib/testLib.o] Error 1

请帮帮我。