android binder c++层 - 回调客户端服务 - 客户端(c++层) 调用 服务端(c++层) 例子，服务端回调客户端服务

binder c++层 服务端回调客户端

sampleClient.cpp

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#include <binder/IServiceManager.h>

#include <binder/IBinder.h>

#include <binder/Parcel.h>

#include <binder/ProcessState.h>

#include <binder/IPCThreadState.h>

#include <private/binder/binder_module.h>

using namespace android;

#ifdef LOG_TAG

#undef LOG_TAG

#endif

#define LOG_TAG "sampleCallback"

#define SAMPLE_SERIVCE_DES "sample.hello"

#define SAMPLE_CB_SERIVCE_DES "android.os.SampleCallback"

#define SRV_CODE 1

#define CB_CODE 1

class SampeCallback : public BBinder

{

     public:

     SampeCallback()

     {

          mydescriptor = String16(SAMPLE_CB_SERIVCE_DES);

     }

     virtual ~SampeCallback() {

          

     }

     virtual const String16& getInterfaceDescriptor() const{

           return mydescriptor;

     }

     protected:

     

     void callbackFunction() {

          LOGI( "Client callback function called-----------cb" );

     }

     

     virtual status_t onTransact( uint32_t code,

               const Parcel& data,Parcel* reply,uint32_t flags = 0){

          LOGD( "Client onTransact, code = %d", code);   

         

           switch (code){

           case CB_CODE:

              callbackFunction();

               break;

           default:

               return BBinder::onTransact(code, data, reply, flags);

          }

           return 0;

     }

     private:

     String16 mydescriptor;

};

int main()

{

     sp<IServiceManager> sm = defaultServiceManager();

     sp<IBinder> ibinder = sm->getService(String16(SAMPLE_SERIVCE_DES));

     if (ibinder == NULL){

          LOGW( "Client can't find Service"" );

           return -1;

     }

     Parcel _data,_reply;

     SampeCallback *callback = new SampeCallback();

     _data.writeStrongBinder(sp<IBinder>(callback));

     int ret = ibinder->transact(SRV_CODE, _data, &_reply, 0);

//     ProcessState::self()->startThreadPool();

//     IPCThreadState::self()->joinThreadPool();

     while(1);

     return 0;

}

sampleService.cpp

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#include <binder/IServiceManager.h>

#include <binder/IBinder.h>

#include <binder/Parcel.h>

#include <binder/ProcessState.h>

#include <binder/IPCThreadState.h>

using namespace android;

#ifdef LOG_TAG

#undef LOG_TAG

#endif

#define LOG_TAG "sampleService"

#define SAMPLE_SERIVCE_DES "sample.hello"

#define SAMPLE_CB_SERIVCE_DES "android.os.SampleCallback"

#define SRV_CODE 1

#define CB_CODE 1

class SampleService: public BBinder {

public:

     SampleService() {

          mydescriptor = String16(SAMPLE_SERIVCE_DES);

     }

     

     virtual ~SampleService() {

     }

     virtual const String16& getInterfaceDescriptor() const {

           return mydescriptor;

     }

     

protected:

     

     void callFunction() {

          LOGE( "Service callFunction-----------");

     }

     

     virtual status_t onTransact(uint32_t code, const Parcel& data,

              Parcel* reply, uint32_t flags = 0) {

          LOGD( "Service onTransact, code = %d" , code);

           switch (code) {

           case SRV_CODE:

              callback = data.readStrongBinder();

               if (callback != NULL)

              {

                   Parcel _data, _reply;

                   _data.writeInterfaceToken(String16(SAMPLE_CB_SERIVCE_DES));

                    int ret = callback->transact(CB_CODE, _data, &_reply, 0);

              }

              callFunction();

               break;

           default:

               return BBinder::onTransact(code, data, reply, flags);

          }

           return 0;

     }

private:

     String16 mydescriptor;

     sp<IBinder> callback;

};

int main() {

     sp < IServiceManager > sm = defaultServiceManager();

     SampleService* samServ = new SampleService();

     status_t ret = sm->addService(String16(SAMPLE_SERIVCE_DES), samServ);

     LOGD("Service addservice");

     ProcessState::self()->startThreadPool();

//     IPCThreadState::self()->joinThreadPool( true);

     while(1);

     return 0;

}

Android.mk

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LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := eng

LOCAL_SRC_FILES:= \

       sampleClient.cpp

LOCAL_C_INCLUDES += \

        $(LOCAL_PATH) \

LOCAL_SHARED_LIBRARIES : = \

    libcutils \

    libbinder \

    libutils \

    libhardware

LOCAL_CFLAGS := -DRIL_SHLIB

LOCAL_MODULE:= sampleClient

include $(BUILD_EXECUTABLE)

include $(CLEAR_VARS)

LOCAL_MODULE_TAGS := eng

LOCAL_SRC_FILES:= \

           sampleService.cpp

LOCAL_C_INCLUDES += \

        $(LOCAL_PATH) \

LOCAL_SHARED_LIBRARIES : = \

    libcutils \

    libbinder \

    libutils \

    libhardware

LOCAL_CFLAGS := -DRIL_SHLIB

LOCAL_MODULE:= sampleService

include $(BUILD_EXECUTABLE)

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1、新建文件夹binderSample

2、将以上三个文件放入ics-4.x\external\binderSample

3、编译，拷贝到开发环境中，chmod，然后各自运行

 4、看log