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如何实现Binder的客户端程序

2013年08月29日 ⁄ 综合 ⁄ 共 4341字 ⁄ 字号小中大 ⁄ 评论关闭

参考文献:

http://blog.csdn.net/baiyanning/article/details/6191682

前面一章介绍了如何Binder的服务器端.

接下来就是如何实现客户端程序了.我们将要介绍的客户端可执行程序为Example

第1步:

在framework/base目录下新建一个ExampleClient目录，用以保存客户端源代码:

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$cd framework/base/
$mkdir ExampleClient
$cd ExampleClient/

$cd framework/base/ $mkdir ExampleClient $cd ExampleClient/

第2步:

在这个ExampleClient目录下有3个源文件:Example.h,Example.cpp,Android.mk

其中Example.h的文件内容如下:

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// File: Example.h
#ifndef ANDROID_BYN_EXAMPLE_H
#define ANDROID_BYN_EXAMPLE_H
namespace android
{
class Example {
public:
void add100(int n);
private:
static const void getExampleService();
};
}; //namespace
#endif // ANDROID_BYN_EXAMPLE_H

// File: Example.h #ifndef ANDROID_BYN_EXAMPLE_H #define ANDROID_BYN_EXAMPLE_H namespace android { class Example { public: void add100(int n); private: static const void getExampleService(); }; }; //namespace #endif // ANDROID_BYN_EXAMPLE_H Example.cpp的文件内容如下:

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// File: Example.cpp
#include <binder/IServiceManager.h>
#include <binder/IPCThreadState.h>
#include "Example.h"
namespace android
{
sp<IBinder> binder;
void Example::add100(int n)
{
getExampleService();
Parcel data, reply;
int answer;
data.writeInt32(getpid());
data.writeInt32(n);
LOGE("BpExampleService::create remote()->transact()/n");
binder->transact(0, data, &reply);
answer = reply.readInt32();
printf("answner=%d/n", answer);
return;
}
const void Example::getExampleService()
{
sp<IServiceManager> sm = defaultServiceManager();
binder = sm->getService(String16("byn.example"));
LOGE("Example::getExampleService %p/n",sm.get());
if (binder == 0) {
LOGW("ExampleService not published, waiting...");
return;
}
}
}; //namespace
using namespace android;
int main(int argc, char** argv)
{
Example* p = new Example();
p->add100(1);
return 0;
}

// File: Example.cpp #include <binder/IServiceManager.h> #include <binder/IPCThreadState.h> #include "Example.h" namespace android { sp<IBinder> binder; void Example::add100(int n) { getExampleService(); Parcel data, reply; int answer; data.writeInt32(getpid()); data.writeInt32(n); LOGE("BpExampleService::create remote()->transact()/n"); binder->transact(0, data, &reply); answer = reply.readInt32(); printf("answner=%d/n", answer); return; } const void Example::getExampleService() { sp<IServiceManager> sm = defaultServiceManager(); binder = sm->getService(String16("byn.example")); LOGE("Example::getExampleService %p/n",sm.get()); if (binder == 0) { LOGW("ExampleService not published, waiting..."); return; } } }; //namespace using namespace android; int main(int argc, char** argv) { Example* p = new Example(); p->add100(1); return 0; } Android.mk文件的内容如下:

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# File: Example
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES:= \
Example.cpp
LOCAL_C_INCLUDES := $(JNI_H_INCLUDE)
LOCAL_SHARED_LIBRARIES := \
libutils libbinder libExample
LOCAL_MODULE_TAGS := optional
LOCAL_PRELINK_MODULE := false
LOCAL_MODULE := Example
include $(BUILD_EXECUTABLE)

# File: Example LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_SRC_FILES:= \ Example.cpp LOCAL_C_INCLUDES := $(JNI_H_INCLUDE) LOCAL_SHARED_LIBRARIES := \ libutils libbinder libExample LOCAL_MODULE_TAGS := optional LOCAL_PRELINK_MODULE := false LOCAL_MODULE := Example include $(BUILD_EXECUTABLE)