Native Service的完整示例

1.http://blog.youkuaiyun.com/yongyu_it/article/details/54629675

2.http://blog.youkuaiyun.com/zhx6044/article/details/47342227

AOSP版本：Android-7-0-0_r6

项目结构：位于android-7-0-0_r6\frameworks\native\services\thinking_test下

1、service：native service的主体，即服务的实现部分

2、server：native service的载体，即启动和注册服务的部分。

3、client：客户端程序，服务调用封装。

4、test：测试client

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service

ThinkingService.h

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1. #ifndef THINKING_SERVICE_H  
2. #define THINKING_SERVICE_H  
3.   
4. #include <utils/RefBase.h>  
5. #include <binder/IInterface.h>  
6. #include <binder/Parcel.h>  
7.   
8. #include <android/log.h>  
9. #define LOGE(...) __android_log_print(ANDROID_LOG_ERROR  , "ProjectName", __VA_ARGS__)  
10.   
11. namespace android{  
12.     class ThinkingService : public BBinder  
13.     {  
14.         private:  
15.           
16.         public:  
17.         //单例模式  
18.         static int Instance();  
19.         ThinkingService();  
20.         virtual ~ThinkingService();  
21.         //预定义通信方法，签名写死  
22.         //参数意义是：通信状态，输入参数，输出参数，执行状态  
23.         virtual status_t onTransact(uint32_t, const Parcel&, Parcel*, uint32_t);  
24.     };  
25. }  
26.   
27. #endif  

ThinkingService.cpp

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1. #include <binder/IServiceManager.h>  
2. #include <binder/IPCThreadState.h>  
3. #include "ThinkingService.h"  
4.   
5. namespace android  
6. {  
7.     static pthread_key_t sigbuskey;  
8.     int ThinkingService::Instance()  
9.     {  
10.         LOGE("-----------ThinkingService-->Instance \n");  
11.         int ret=defaultServiceManager()->addService( String16("thinking.svc"),new ThinkingService());  
12.         LOGE("-----------ThinkingService-->Instance %d \n",ret);  
13.         return ret;  
14.     }  
15.       
16.     ThinkingService::ThinkingService()  
17.     {  
18.         LOGE("-----------ThinkingService");  
19.         pthread_key_create(&sigbuskey,NULL);  
20.     }  
21.       
22.     ThinkingService::~ThinkingService()  
23.     {  
24.         LOGE("-----------~ThinkingService");  
25.         pthread_key_delete(sigbuskey);  
26.     }  
27.       
28.     status_t ThinkingService::onTransact(uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)  
29.     {  
30.         switch(code)  
31.         {  
32.             case 0:  
33.             {  
34.                 int a=data.readInt32();  
35.                 int b=data.readInt32();  
36.                 reply->writeInt32(a*b);  
37.                 return NO_ERROR;  
38.             }  
39.             default:  
40.                 return BBinder::onTransact(code, data, reply, flags);  
41.         }  
42.     }  
43. }  

Android.mk

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1. LOCAL_PATH:=$(call my-dir)  
2. include $(CLEAR_VARS)  
3. LOCAL_SRC_FILES:=ThinkingService.cpp  
4. LOCAL_SHARED_LIBRARIES:=libutils libbinder  
5. LOCAL_MODULE_TAGS:=optional  
6. LOCAL_MODULE:=libThinkingService  
7. LOCAL_PRELINK_MODULE:=false  
8. LOCAL_LDLIBS +=  -llog  
9. include $(BUILD_SHARED_LIBRARY)  

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server

ThinkingServer.cpp

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1. #include <stdio.h>  
2. #include <sys/types.h>  
3. #include <unistd.h>  
4. #include <grp.h>  
5. #include <binder/IPCThreadState.h>  
6. #include <binder/ProcessState.h>  
7. #include <binder/IServiceManager.h>  
8. #include <utils/Log.h>  
9. #include "../service/ThinkingService.h"  
10.   
11. using namespace android;  
12.   
13. int main(int arg, char** argv)  
14. {  
15.     printf("ThinkingService start register \n");  
16.     sp<ProcessState> proc(ProcessState::self());  
17.     sp<IServiceManager> sm = defaultServiceManager();  
18.     int ret=ThinkingService::Instance();  
19.     ProcessState::self()->startThreadPool();  
20.     IPCThreadState::self()->joinThreadPool();  
21.     return 0;  
22. }  

Android.mk

[python]  view plain  copy

1. LOCAL_PATH:=$(call my-dir)  
2. include $(CLEAR_VARS)  
3. LOCAL_SRC_FILES:=ThinkingServer.cpp  
4. LOCAL_SHARED_LIBRARIES:=libutils libbinder libThinkingService  
5. LOCAL_MODULE_TAGS:=optional  
6. LOCAL_MODULE:=ThinkingServer  
7. include $(BUILD_EXECUTABLE)  

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client

ThinkingClient.h

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1. #ifndef THINKING_CLIENT_H  
2. #define THINKING_CLIENT_H  
3.   
4. namespace android  
5. {  
6.     class ThinkingClient  
7.     {  
8.         public:  
9.         int setData(int a,int b);  
10.         private:  
11.         static void getThinkingService();  
12.     };  
13. }  
14.   
15. #endif  

ThinkingClient.cpp

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1. #include <binder/IServiceManager.h>  
2. #include <binder/IPCThreadState.h>  
3. #include "ThinkingClient.h"  
4.   
5. namespace android  
6. {  
7.     sp<IBinder> binder;  
8.       
9.     int ThinkingClient::setData(int a,int b)  
10.     {  
11.         getThinkingService();  
12.         Parcel data,reply;  
13.         data.writeInt32(a);  
14.         data.writeInt32(b);  
15.         binder->transact(0, data, &reply);  
16.         int result=reply.readInt32();  
17.         return result;  
18.     }  
19.       
20.     void ThinkingClient::getThinkingService()  
21.     {  
22.         sp<IServiceManager> sm = defaultServiceManager();  
23.         binder = sm->getService(String16("thinking.svc"));  
24.         if(binder == 0)  
25.             return;  
26.     }  
27. }  

Android.mk

[python]  view plain  copy

1. LOCAL_PATH:=$(call my-dir)  
2. include $(CLEAR_VARS)  
3. LOCAL_SRC_FILES:=ThinkingClient.cpp  
4. LOCAL_SHARED_LIBRARIES:=libutils libbinder  
5. LOCAL_MODULE_TAGS:=optional  
6. LOCAL_MODULE:=libThinkingClient  
7. LOCAL_PRELINK_MODULE:=false  
8. include $(BUILD_SHARED_LIBRARY)  

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test

test.cpp

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1. #include <stdio.h>  
2. #include "../client/ThinkingClient.h"  
3.   
4. using namespace android;  
5.   
6. int main(int argc, char** argv)  
7. {  
8.     ThinkingClient client;  
9.     int result=client.setData(1,2);  
10.     printf("result is %d \n",result);  
11.     return 0;  
12. }  

Android.mk

[python]  view plain  copy

1. LOCAL_PATH:=$(call my-dir)  
2. include $(CLEAR_VARS)  
3. LOCAL_SRC_FILES:=test.cpp  
4. LOCAL_SHARED_LIBRARIES:=libThinkingClient  
5. LOCAL_MODULE_TAGS:=optional  
6. LOCAL_MODULE:=ThinkingTest  
7. include $(BUILD_EXECUTABLE)  

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整个项目的Android.mk文件（即android-7-0-0_r6\frameworks\native\services\thinking_test\Android.mk）

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1. include $(call all-subdir-makefiles)  

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实际验证

1、把这4个部分编译出来

[yong@localhost android-7-0-0_r6]$ cd frameworks/native/services/thinking_test
[yong@localhost thinking_test]$ mm

[yong@localhost android-7-0-0_r6]$ ls out/target/product/angler/system/lib

可以看到

[yong@localhost android-7-0-0_r6]$ ls out/target/product/angler/system/bin

可以看到

2、用adb命令将编译结果push到测试手机里面去

Z:\AndroidSourceCode\android-7-0-0_r6>adb push .\out\target\product\angler\system\lib\libThinkingClient.so /system/lib/
[100%] /system/lib/libThinkingClient.so


Z:\AndroidSourceCode\android-7-0-0_r6>adb push .\out\target\product\angler\system\lib\libThinkingService.so /system/lib/
[100%] /system/lib/libThinkingService.so

Z:\AndroidSourceCode\android-7-0-0_r6>adb push .\out\target\product\angler\system\bin\ThinkingServer /system/bin/
[100%] /system/bin/ThinkingServer


Z:\AndroidSourceCode\android-7-0-0_r6>adb push .\out\target\product\angler\system\bin\ThinkingTest /system/bin/
[100%] /system/bin/ThinkingTest

3、测试

Z:\AndroidSourceCode\android-7-0-0_r6>adb shell

angler:/system/bin # ./ThinkingServer &
[1] 16230
angler:/system/bin # ThinkingService start register

angler:/system/bin # ./ThinkingTest
result is 2

angler:/system/bin #

编译优化

如果嫌mm的方式麻烦

可在android-7-0-0_r6\build\target\product\base.mk添加如下代码

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1. PRODUCT_PACKAGES += \  
2. ......  
3.     libThinkingService \  
4.     libThinkingClient \  
5.     ThinkingServer \  
6.     ThinkingTest \  
7. ......  

即可将这些模块加入AOSP编译系统，这样直接make，就可得到包含这些模块的输出结果（system.img）