AIDL

创建一个接口，再里面定义方法

package com.example.taidl;  
interface ICalcAIDL  
{  
    int add(int x , int y);  
    int min(int x , int y );  
}

build一下gen目录下会生成ICalcAIDL.java文件

/*
 * This file is auto-generated.  DO NOT MODIFY.
 * Original file: /Users/dream/Downloads/android/androidProject/TAIDL/src/com/example/taidl/ICalcAIDL.aidl
 */
package com.example.taidl;
public interface ICalcAIDL extends android.os.IInterface
{
/** Local-side IPC implementation stub class. */
public static abstract class Stub extends android.os.Binder implements com.example.taidl.ICalcAIDL
{
private static final java.lang.String DESCRIPTOR = "com.example.taidl.ICalcAIDL";
/** Construct the stub at attach it to the interface. */
public Stub()
{
this.attachInterface(this, DESCRIPTOR);
}
/**
 * Cast an IBinder object into an com.example.taidl.ICalcAIDL interface,
 * generating a proxy if needed.
 */
public static com.example.taidl.ICalcAIDL asInterface(android.os.IBinder obj)
{
if ((obj==null)) {
return null;
}
android.os.IInterface iin = obj.queryLocalInterface(DESCRIPTOR);
if (((iin!=null)&&(iin instanceof com.example.taidl.ICalcAIDL))) {
return ((com.example.taidl.ICalcAIDL)iin);
}
return new com.example.taidl.ICalcAIDL.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_add:
{
data.enforceInterface(DESCRIPTOR);
int _arg0;
_arg0 = data.readInt();
int _arg1;
_arg1 = data.readInt();
int _result = this.add(_arg0, _arg1);
reply.writeNoException();
reply.writeInt(_result);
return true;
}
case TRANSACTION_min:
{
data.enforceInterface(DESCRIPTOR);
int _arg0;
_arg0 = data.readInt();
int _arg1;
_arg1 = data.readInt();
int _result = this.min(_arg0, _arg1);
reply.writeNoException();
reply.writeInt(_result);
return true;
}
}
return super.onTransact(code, data, reply, flags);
}
private static class Proxy implements com.example.taidl.ICalcAIDL
{
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 int add(int x, int y) 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.writeInt(x);
_data.writeInt(y);
mRemote.transact(Stub.TRANSACTION_add, _data, _reply, 0);
_reply.readException();
_result = _reply.readInt();
}
finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
@Override public int min(int x, int y) 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.writeInt(x);
_data.writeInt(y);
mRemote.transact(Stub.TRANSACTION_min, _data, _reply, 0);
_reply.readException();
_result = _reply.readInt();
}
finally {
_reply.recycle();
_data.recycle();
}
return _result;
}
}
static final int TRANSACTION_add = (android.os.IBinder.FIRST_CALL_TRANSACTION + 0);
static final int TRANSACTION_min = (android.os.IBinder.FIRST_CALL_TRANSACTION + 1);
}
public int add(int x, int y) throws android.os.RemoteException;
public int min(int x, int y) throws android.os.RemoteException;
}

新建一个Service

package com.example.taidl;

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;

public class CalcService extends Service{

    private static final String TAG = "server";  

    public void onCreate()  
    {  
        Log.e(TAG, "onCreate");  
    }  

    public IBinder onBind(Intent t)  
    {  
        Log.e(TAG, "onBind");  
        return mBinder;  
    }  

    public void onDestroy()  
    {  
        Log.e(TAG, "onDestroy");  
        super.onDestroy();  
    }  

    public boolean onUnbind(Intent intent)  
    {  
        Log.e(TAG, "onUnbind");  
        return super.onUnbind(intent);  
    }  

    public void onRebind(Intent intent)  
    {  
        Log.e(TAG, "onRebind");  
        super.onRebind(intent);  
    }  
    private final ICalcAIDL.Stub mBinder = new ICalcAIDL.Stub() {

        @Override
        public int min(int x, int y) throws RemoteException {
            return x + y;
        }

        @Override
        public int add(int x, int y) throws RemoteException {
            // TODO Auto-generated method stub
            return x - y;
        }
    };
}

创建了一个mBinder对象，并在Service的onBind方法中返回
注册Service

<service android:name="com.example.taidl.CalcService">
            <intent-filter>  
               <action android:name="com.example.taidl.calc" />  

               <category android:name="android.intent.category.DEFAULT" />  
           </intent-filter>  
</service>

我们一会会在别的应用程序中通过Intent来查找此Service；这个不需要Activity，所以我也就没写Activity，安装完成也看不到安装图标，悄悄在后台运行着。服务端编写完毕。下面开始编写客户端:

package com.example.tclient;

import com.example.taidl.ICalcAIDL;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends Activity {

    private ICalcAIDL mCalcAidl;

    private ServiceConnection mServiceConn = new ServiceConnection()
    {
        @Override
        public void onServiceDisconnected(ComponentName name)
        {
            Log.e("client", "onServiceDisconnected");
            mCalcAidl = null;
        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service)
        {
            Log.e("client", "onServiceConnected");
            mCalcAidl = ICalcAIDL.Stub.asInterface(service);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

    }

    /**
     * 点击BindService按钮时调用
     * @param view
     */
    public void bindService(View view)
    {
        Intent intent = new Intent();
        intent.setAction("com.example.taidl.calc");
        bindService(intent, mServiceConn, Context.BIND_AUTO_CREATE);
    }
    /**
     * 点击unBindService按钮时调用
     * @param view
     */
    public void unbindService(View view)
    {
        unbindService(mServiceConn);
    }
    /**
     * 点击12+12按钮时调用
     * @param view
     */
    public void addInvoked(View view) throws Exception
    {

        if (mCalcAidl != null)
        {
            int addRes = mCalcAidl.add(12, 12);
            Toast.makeText(this, addRes + "", Toast.LENGTH_SHORT).show();
        } else
        {
            Toast.makeText(this, "服务器被异常杀死，请重新绑定服务端", Toast.LENGTH_SHORT)
                    .show();

        }

    }
    /**
     * 点击50-12按钮时调用
     * @param view
     */
    public void minInvoked(View view) throws Exception
    {

        if (mCalcAidl != null)
        {
            int addRes = mCalcAidl.min(50, 12);
            Toast.makeText(this, addRes + "", Toast.LENGTH_SHORT).show();
        } else
        {
            Toast.makeText(this, "服务器未绑定或被异常杀死，请重新绑定服务端", Toast.LENGTH_SHORT)
                    .show();

        }

    }
}

将服务端的aidl文件完整的复制过来，包名一定要一致。