android实现一个service

 

 

#include <binder/IBinder.h>#include <binder/IInterface.h>#include <binder/Parcel.h>#include <binder/IPCThreadState.h>#include <binder/ProcessState.h>#include <binder/IServiceManager.h>using namespace android;class Work;class IWork : public IInterface{public:DECLARE_META_INTERFACE(Work);virtual int add(int a, int b) = 0; enum { ADD_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION }; };class BnWork : public BnInterface<IWork>{public: status_t onTransact(uint32_t code, const Parcel& data,Parcel* reply, uint32_t flags){ switch(code) {case FIRST_CALL_TRANSACTION:{CHECK_INTERFACE(IWork, data, reply);int a = data.readInt32();int b = data.readInt32();int c = add(a, b);reply->writeInt32(c);return NO_ERROR;}break;default: return BBinder::onTransact(code, data, reply, flags);}}};class BpWork : public BpInterface<IWork>{ public: BpWork(const sp<IBinder>& impl): BpInterface<IWork>(impl) { } int add(int a, int b) { Parcel data; Parcel reply; data.writeInterfaceToken(IWork::getInterfaceDescriptor()); data.writeInt32(a); data.writeInt32(b); remote()->transact(ADD_TRANSACTION, data, &reply); int c = reply.readInt32(); LOGI("work:BpWork::add(%d, %d) = %d", a, b, c); return c; } };IMPLEMENT_META_INTERFACE(Work, "com.mywork"); class Work : public BnWork{public:int add(int a, int b){LOGI("Work::add(%d, %d) = %d", a, b, a + b);return a + b;}static void instantiate(){defaultServiceManager()->addService(String16("com.mywork"), new Work()); }};int main(int argc, char** argv){ sp<ProcessState> proc(ProcessState::self()); sp<IServiceManager> sm = defaultServiceManager(); LOGI("ServiceManager: %p", sm.get()); Work::instantiate(); ProcessState::self()->startThreadPool(); IPCThreadState::self()->joinThreadPool();}

编译需要binder, cutils, utils头文件和动态库. 这个可以从android源代码中copy出来

 

 

测试程序

#include <binder/IBinder.h>#include <binder/IInterface.h>#include <binder/Parcel.h>#include <binder/IPCThreadState.h>#include <binder/ProcessState.h>#include <binder/IServiceManager.h>using namespace android;class Work;class IWork : public IInterface{public:DECLARE_META_INTERFACE(Work);virtual int add(int a, int b) = 0; enum { ADD_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION }; };class BpWork : public BpInterface<IWork>{ public: BpWork(const sp<IBinder>& impl): BpInterface<IWork>(impl) { } int add(int a, int b) { Parcel data; Parcel reply; data.writeInterfaceToken(IWork::getInterfaceDescriptor()); data.writeInt32(a); data.writeInt32(b); remote()->transact(ADD_TRANSACTION, data, &reply); int c = reply.readInt32(); LOGI("test:BpWork::add(%d, %d) = %d", a, b, c); return c; } };IMPLEMENT_META_INTERFACE(Work, "com.mywork"); int main(int argc, char** argv){ sp<IServiceManager> sm = defaultServiceManager();sp<IWork> pwork = interface_cast<IWork>(sm->getService(String16("com.mywork")));LOGI("IWork::Add(1,2) = %d/n", pwork->add(1,2));}

 

 

用adb 分别push到模拟器上(2.1). 就可以执行了.

 

分别启动 work和test程序.