如何定制自己的native service： example (C++)

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IMyService.h:

#ifndef MY_SERVICE_DEMO

#define MY_SERVICE_DEMO

#include <stdio.h>

#include <binder/IInterface.h>

#include <binder/Parcel.h>

#include <binder/IBinder.h>

#include <binder/ProcessState.h>

#include <binder/IPCThreadState.h>

#include <binder/IServiceManager.h>

using namespace android;

namespace android

{

class IMyService: public IInterface {

public:

DECLARE_META_INTERFACE(MyService);

virtual void sayHello() = 0;

};

enum {

HELLO = IBinder::FIRST_CALL_TRANSACTION,

};

class BpMyService: public BpInterface<IMyService> {

public:

BpMyService(const sp<IBinder>& impl);

virtual void sayHello();

};

class BnMyService: public BnInterface<IMyService> {

public:

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

uint32_t flags = 0);

virtual void sayHello();

};

}

#endif

IMyService.cpp:

#include "IMyService.h"

namespace android

{

IMPLEMENT_META_INTERFACE(MyService, "android.demo.IMyService");

// client

BpMyService::BpMyService(const sp<IBinder>& impl):BpInterface<IMyService>(impl)

{

}

// to implement client's sayhello method

void BpMyService::sayHello() {

printf("BpMyService::SayHello\n");

Parcel data, reply;

data.writeInterfaceToken(IMyService::getInterfaceDescriptor());

remote()->transact(HELLO, data, &reply);

printf("get num from BnService: %d\n", reply.readInt32());

}

//Server side: receive remote msg, and handle onTransact()

status_t BnMyService::onTransact(uint_t code, const Parcel& data,

Parcel* reply, uint32_t flags) {

switch(code) {

case HELLO:

printf("BnMyService:: got the client hello\n");

CHECK_INTERFACE(IMyService, data, reply);

sayHello();

reply->writeInt32(2016);

return NO_ERROR;

break;

default:

break;

}

return NO_ERROR;

}

// Server side: sayHello()

void BnMyService::sayHello() {

printf("BnMyService::sayHello\n");

};

}

ServerDemo.cpp:

#include "IMyService.h"

int main() {

sp <IServiceManager> sm = defaultServiceManager();

sm->addService(String16("service.myservice"), new BnMyService());

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

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

return 0;

}

将名为”service.myservice”的BnMyService服务添加到ServiceManager，并启动服务

ClientDemo.cpp

#include "IMyService.h"

int main () {

sp <IServiceManager> sm = defaultServiceManager();

sp <IBinder> binder = sm->getService(String16("service.myservice"));

sp <IMyService> cs = interface_cast <IMyService> (binder);

cs->sayHello(); // Remote call

return 0;

}

编译好后，adb push到手机目录中/system/bin

之后开2个终端：

root@:/ # /system/bin/ServerDemo

BnMyService:: got the client hello

BnMyService::sayHello

root@:/ # /system/bin/ClientDemo

BpMyService::SayHello

get num from BnService: 2016

https://www.processon.com/view/link/583feda2e4b08e313590a25d

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