jni编译错误：Native registration unable to find class
跟着老罗的那个从内核驱动到上层的开发一直做到为上层提供jni接口这，就这在出了问题，哪位高手能帮个忙，告诉我问题出在哪里？都以及2天了03-02 22:35:34.677: I/Zygote(171): ...preloaded 379 resources in 3944ms.
03-02 22:35:34.757: D/dalvikvm(171): GC_EXPLICIT freed 20K, 2% free 6461K/6531K, paused 3ms+3ms
03-02 22:35:34.807: I/Zygote(171): ...preloaded 31 resources in 123ms.
03-02 22:35:34.857: D/dalvikvm(171): GC_EXPLICIT freed 14K, 2% free 6463K/6531K, paused 5ms+4ms
03-02 22:35:34.917: D/dalvikvm(171): GC_EXPLICIT freed 6K, 2% free 6457K/6531K, paused 3ms+3ms
03-02 22:35:34.977: D/dalvikvm(171): GC_EXPLICIT freed <1K, 2% free 6457K/6531K, paused 3ms+4ms
03-02 22:35:34.997: I/dalvikvm(171): System server process 184 has been created
03-02 22:35:35.007: I/Zygote(171): Accepting command socket connections
03-02 22:35:35.238: E/BatteryService(184): usbOnlinePath not found
03-02 22:35:35.238: E/BatteryService(184): batteryVoltagePath not found
03-02 22:35:35.238: E/BatteryService(184): batteryTemperaturePath not found
03-02 22:35:35.248: E/UsbHostManagerJNI(184): hellousbhost
03-02 22:35:35.258: E/(184): onhello
03-02 22:35:35.258: I/HelloService(184): hellpeng
03-02 22:35:35.258: E/JNIHelp(184): Native registration unable to find class 'com/android/server/HelloService', aborting
03-02 22:35:35.258: A/libc(184): Fatal signal 11 (SIGSEGV) at 0xdeadbaad (code=1)
03-02 22:35:35.767: I/DEBUG(33): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
这个是错误信息
我的jni是这样写的：
#define LOG_TAG "HelloService"
#include "jni.h"
#include "JNIHelp.h"
#include "android_runtime/AndroidRuntime.h"
#include "utils/Vector.h"
#include <utils/misc.h>
#include <utils/Log.h>
#include <hardware/hardware.h>
#include <hardware/hello.h>
#include <stdio.h>
namespace android
{
/*在硬件抽象层中定义的硬件访问结构体，参考<hardware/hello.h>*/
struct hello_device_t* hello_device = NULL;
/*通过硬件抽象层定义的硬件访问接口设置硬件寄存器val的值*/
static void hello_setVal(JNIEnv* env, jobject clazz, jint value) {
int val = value;
LOGI("Hello JNI: set value %d to device.", val);
if(!hello_device) {
LOGI("Hello JNI: device is not open.");
return;
}
hello_device->set_val(hello_device, val);
}
/*通过硬件抽象层定义的硬件访问接口读取硬件寄存器val的值*/
static jint hello_getVal(JNIEnv* env, jobject clazz) {
int val = 0;
if(!hello_device) {
LOGI("Hello JNI: device is not open.");
return val;
}
hello_device->get_val(hello_device, &val);
LOGI("Hello JNI: get value %d from device.", val);
return val;
}
/*通过硬件抽象层定义的硬件模块打开接口打开硬件设备*/
static inline int hello_device_open(const hw_module_t* module, struct hello_device_t** device) {
return module->methods->open(module, HELLO_HARDWARE_MODULE_ID, (struct hw_device_t**)device);
}
/*通过硬件模块ID来加载指定的硬件抽象层模块并打开硬件*/
static jboolean hello_init(JNIEnv* env, jclass clazz) {
hello_module_t* module;
LOGI("Hello JNI: initializing......");
if(hw_get_module(HELLO_HARDWARE_MODULE_ID, (const struct hw_module_t**)&module) == 0) {
LOGI("Hello JNI: hello Stub found.");
if(hello_device_open(&(module->common), &hello_device) == 0) {
LOGI("Hello JNI: hello device is open.");
return 0;
}
LOGE("Hello JNI: failed to open hello device.");
return -1;
}
LOGE("Hello JNI: failed to get hello stub module.");
return -1;
}
/*JNI方法表*/
static const JNINativeMethod method_table[] = {
{"init_native", "()Z", (void*)hello_init},
{"setVal_native", "(I)V", (void*)hello_setVal},
{"getVal_native", "()I", (void*)hello_getVal},
};
/*注册JNI方法*/
int register_android_server_HelloService(JNIEnv *env) {
LOGI("hellpeng");
return jniRegisterNativeMethods(env, "com/android/server/HelloService", method_table, NELEM(method_table));
}
};
然后在onload.cpp里这样加的
/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "JNIHelp.h"
#include "jni.h"
#include "utils/Log.h"
#include "utils/misc.h"
namespace android {
int register_android_server_AlarmManagerService(JNIEnv* env);
int register_android_server_BatteryService(JNIEnv* env);
int register_android_server_InputApplicationHandle(JNIEnv* env);
int register_android_server_InputWindowHandle(JNIEnv* env);
int register_android_server_InputManager(JNIEnv* env);
int register_android_server_LightsService(JNIEnv* env);
int register_android_server_PowerManagerService(JNIEnv* env);
int register_android_server_UsbDeviceManager(JNIEnv* env);
int register_android_server_UsbHostManager(JNIEnv* env);
int register_android_server_VibratorService(JNIEnv* env);
int register_android_server_SystemServer(JNIEnv* env);
int register_android_server_HelloService(JNIEnv* env);
int register_android_server_location_GpsLocationProvider(JNIEnv* env);
int register_android_server_connectivity_Vpn(JNIEnv* env);
};
using namespace android;
extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
JNIEnv* env = NULL;
jint result = -1;
if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
LOGE("GetEnv failed!");
return result;
}
LOG_ASSERT(env, "Could not retrieve the env!");
register_android_server_PowerManagerService(env);
register_android_server_InputApplicationHandle(env);
register_android_server_InputWindowHandle(env);
register_android_server_InputManager(env);
register_android_server_LightsService(env);
register_android_server_AlarmManagerService(env);
register_android_server_BatteryService(env);
register_android_server_UsbDeviceManager(env);
register_android_server_UsbHostManager(env);
register_android_server_VibratorService(env);
register_android_server_SystemServer(env);
LOGE("onhello");
register_android_server_HelloService(env);
LOGE("onhelloend");
register_android_server_location_GpsLocationProvider(env);
register_android_server_connectivity_Vpn(env);
return JNI_VERSION_1_4;
}
红色的是我加的，makefile文件也没问题，因为我以及看到成才的so文件了，但是一致报那个错，模拟器在android那几个字的开机界面起不来，看门口一直不断尝试重启
还有，这个onload.cpp加载的是jni下面的方法还是java下的方法？能否告诉我原理 --------------------编程问答-------------------- 没有人知道吗？ --------------------编程问答-------------------- 没做过，老罗的书？指的是那一本？说一下让大家学习一下高级技术！ --------------------编程问答-------------------- 03-02 22:35:35.258: E/JNIHelp(184): Native registration unable to find class 'com/android/server/HelloService', aborting
这句不是说了吗？你regist了没啊 --------------------编程问答-------------------- Android硬件抽象层（HAL）概要介绍和学习计划
http://blog.csdn.net/luoshengyang/article/details/6567257
一. 在Android内核源代码工程中编写硬件驱动程序。
二. 在Android系统中增加C可执行程序来访问硬件驱动程序。
三. 在Android硬件抽象层增加接口模块访问硬件驱动程序。
四. 在Android系统中编写JNI方法在应用程序框架层提供Java接口访问硬件。
五. 在Android系统的应用程序框架层增加硬件服务接口。
六. 在Android系统中编写APP通过应用程序框架层访问硬件服务。
--------------------编程问答-------------------- 楼主 解决了没 我出现相同错误啊 --------------------编程问答-------------------- register时无法找到指定目录下的service “com/android/server/HelloService”
补充：移动开发 , Android
