java编写binder服务实例

文件目录结果如下：

一、 编写AIDL文件

IHelloService.aidl：

 /** {@hide} */
 interface IHelloService
 {
     void sayhello();
     int sayhello_to(String name);
 }

1. 把 IHelloService.aidl 放入 frameworks/base/core/java/android/os
2. 修改 frameworks/base/Android.mk 添加一行
core/java/android/os/IVibratorService.aidl \
+ core/java/android/os/IHelloService.aidl \

3. mmm frameworks/base

4. 它会生成: ./out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/src/core/java/android/os/IHelloService.java

IHelloService.java自动生成，无需修改

 /*
  * This file is auto-generated.  DO NOT MODIFY.
  * Original file: frameworks/base/core/java/android/os/IHelloService.aidl
  */
 /** {@hide} */
 public interface IHelloService extends android.os.IInterface
 {
     /** Local-side IPC implementation stub class. */
     public static abstract class Stub extends android.os.Binder implements IHelloService
     {
         private static final java.lang.String DESCRIPTOR = "IHelloService";
         /** Construct the stub at attach it to the interface. */
         public Stub()
         {
             this.attachInterface(this, DESCRIPTOR);
         }
         /**
          * Cast an IBinder object into an IHelloService interface,
          * generating a proxy if needed.
          */
         public static IHelloService asInterface(android.os.IBinder obj)
         {
             if ((obj==null)) {
             return null;
             }
             android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
             if (((iin!=null)&&(iin instanceof IHelloService))) {
             return ((IHelloService)iin);
             }
             return new IHelloService.Stub.Proxy(obj);
         }

         @Override public android.os.IBinder asBinder()
         {
             return this;
         }
         @Override public boolean onTransact(int code, android.os.Parcel data, android.os.Parcel reply, int flags) throws android.os.RemoteException
         {
             switch (code)
             {
                 case INTERFACE_TRANSACTION:
                 {
                     reply.writeString(DESCRIPTOR);
                     return true;
                 }
                 case TRANSACTION_sayhello:
                 {
                     data.enforceInterface(DESCRIPTOR);
                     this.sayhello();
                     reply.writeNoException();
                     return true;
                 }
                 case TRANSACTION_sayhello_to:
                 {
                     data.enforceInterface(DESCRIPTOR);
                     java.lang.String _arg0;
                     _arg0 = data.readString();
                     int _result = this.sayhello_to(_arg0);
                     reply.writeNoException();
                     reply.writeInt(_result);
                     return true;
                 }
             }
             return super.onTransact(code, data, reply, flags);
         }

         private static class Proxy implements IHelloService
         {
             private android.os.IBinder mRemote;
             Proxy(android.os.IBinder remote)
             {
                 mRemote = remote;
             }
             @Override public android.os.IBinder asBinder()
             {
                 return mRemote;
             }
             public java.lang.String getInterfaceDescriptor()
             {
                 return DESCRIPTOR;
             }
             @Override public void sayhello() throws android.os.RemoteException
             {
                 android.os.Parcel _data = android.os.Parcel.obtain();
                 android.os.Parcel _reply = android.os.Parcel.obtain();
                 try {
                     _data.writeInterfaceToken(DESCRIPTOR);
                     mRemote.transact(Stub.TRANSACTION_sayhello, _data, _reply, 0);
                     _reply.readException();
                 }
                 finally {
                     _reply.recycle();
                     _data.recycle();
                 }
             }
             @Override public int sayhello_to(java.lang.String name) throws android.os.RemoteException
             {
                 android.os.Parcel _data = android.os.Parcel.obtain();
                 android.os.Parcel _reply = android.os.Parcel.obtain();
                 int _result;
                 try {
                     _data.writeInterfaceToken(DESCRIPTOR);
                     _data.writeString(name);
                     mRemote.transact(Stub.TRANSACTION_sayhello_to, _data, _reply, 0);
                     _reply.readException();
                     _result = _reply.readInt();
                 }
                 finally {
                     _reply.recycle();
                     _data.recycle();
                 }
                     return _result;
             }
         }

         static final int TRANSACTION_sayhello = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
         static final int TRANSACTION_sayhello_to = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);

     }

     public void sayhello() throws android.os.RemoteException;
     public int sayhello_to(java.lang.String name) throws android.os.RemoteException;
 }

HelloService.java

 import android.util.Slog;

 /* 实现Hello服务的函数 */

 public class HelloService extends IHelloService.Stub {
     private static final String TAG = "HelloService";
     private int cnt1 = 0;
     private int cnt2 = 0;

     public void sayhello() throws android.os.RemoteException {
         cnt1++;
         Slog.i(TAG, "sayhello : cnt = "+cnt1);
     }

     public int sayhello_to(java.lang.String name) throws android.os.RemoteException {
         cnt2++;
         Slog.i(TAG, "sayhello_to "+name+" : cnt = "+cnt2);
         return cnt2;
     }
 }

TestServer.java 服务端测试程序

 import android.util.Slog;
 import android.os.ServiceManager;

 /* 1. addService
  * 2. while(true) { read data, parse data, call function, reply }
  */

 public class TestServer {
     private static final String TAG = "TestServer";

     public static void main(String args[])
     {
         /* add Service */
         Slog.i(TAG, "add hello service");
         ServiceManager.addService("hello", new HelloService());

         while (true)
         {
             try {
                 Thread.sleep(100);
               } catch (Exception e){}
         }

     }
 }
  

TestClient.java 客户端测试程序

 import android.util.Slog;
 import android.os.ServiceManager;
 import android.os.IBinder;

 /* 1. getService
  * 2. 调用服务的sayhello,sayhello_to
  *
  */

 /* test_client <hello|goodbye> [name] */

 public class TestClient {
     private static final String TAG = "TestClient";

     public static void main(String args[])
     {
         if (args.length == 0)
         {
             System.out.println("Usage: need parameter: <hello|goodbye> [name]");
             return;
         }

         if (args[0].equals("hello"))
         {
             /* 1. getService */
             IBinder binder = ServiceManager.getService("hello");
             if (binder == null)
             {
                 System.out.println("can not get hello service");
                 Slog.i(TAG, "can not get hello service");
                 return;
             }

             IHelloService svr = IHelloService.Stub.asInterface(binder);

             if (args.length == 1)
             {
                     try {
                     svr.sayhello();
                     System.out.println("call sayhello");
                     Slog.i(TAG, "call sayhello");
                   } catch (Exception e) {}
             }
             else
             {
                     try {
                     int cnt = svr.sayhello_to(args[1]);
                     System.out.println("call sayhello_to "+args[1]+" : cnt = "+cnt);
                     Slog.i(TAG, "call sayhello_to "+args[1]+" : cnt = "+cnt);
                   } catch (Exception e) {}
             }
         }
     }
 }

Android.mk文件

# Copyright 2008 The Android Open Source Project
#
LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)
LOCAL_SRC_FILES := HelloService.java IHelloService.java TestServer.java
LOCAL_MODULE := TestServer
include $(BUILD_JAVA_LIBRARY)

include $(CLEAR_VARS)
LOCAL_SRC_FILES := HelloService.java IHelloService.java TestClient.java
LOCAL_MODULE := TestClient
include $(BUILD_JAVA_LIBRARY)

二、编译:
把程序放到 /work/android-5.0.2/frameworks/testing/APP_Binder_JAVA_App
执行:

. setenv
lunch // 选择单板

mmm frameworks/testing/APP_Binder_JAVA_App
在out目录下它会生成 TestServer.jar, TestClient.jar

(3) 测试:
logcat TestServer:* TestClient:* HelloService:* *:S &
CLASSPATH=/mnt/android_fs/TestServer.jar app_process / TestServer &
CLASSPATH=/mnt/android_fs/TestClient.jar app_process / TestClient hello
CLASSPATH=/mnt/android_fs/TestClient.jar app_process / TestClient hello winfu