activity数据接口负责启动该服务包。service获取数据。手术。

详细demo如下面：

package com.example.android_service_trance;

import android.annotation.SuppressLint;

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.os.Parcel;

import android.os.RemoteException;

import android.util.Log;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import com.example.android_service_trance.MyService.LocalBinder;

@SuppressLint("Recycle")

public class MainActivity extends Activity {

	private Button bindService=null;

	private Button callService=null;

	private Button communicationService=null;

	private TextView tv=null;

	private boolean flag=false;//默觉得不绑定

	private MyService myService=null;

	private LocalBinder binder;//服务里的对象

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		bindService=(Button)this.findViewById(R.id.button1);

		callService=(Button)this.findViewById(R.id.button2);

		communicationService=(Button)this.findViewById(R.id.button3);

		tv=(TextView)this.findViewById(R.id.textView1);

		bindService.setOnClickListener(new OnClickListener() {

			@Override

			public void onClick(View v) {

					//获得意图

					Intent intent=new Intent(MainActivity.this,MyService.class);

					//绑定服务

					bindService(intent, connection, Context.BIND_AUTO_CREATE);

			}

		});

		callService.setOnClickListener(new OnClickListener() {

			@Override

			public void onClick(View v) {

				if(flag){

					int result=myService.getRandom();

					tv.setText("<<<<<<<<"+result);

				}

			}

		});

		communicationService.setOnClickListener(new OnClickListener() {

			@Override

			public void onClick(View v) {

				//往service中传递值的对象

				Parcel data=Parcel.obtain();

				data.writeInt(10086);

				data.writeString("李华");

				Parcel reply=Parcel.obtain();

				try {

					binder.transact(IBinder.LAST_CALL_TRANSACTION, data, reply, 0);

				} catch (RemoteException e) {

					// TODO Auto-generated catch block

					e.printStackTrace();

				}

				//从service里读数据

				Log.i("Main<<<<<<<<",reply.readString());

				Log.i("Main<<<<<<<<<",reply.readInt()+"");

			}

		});

	}

	//解除绑定

	@Override

	protected void onStop() {

		super.onStop();

		if(flag)

		{

			//解除绑定

			unbindService(connection);

			flag=false;

		}

	}

	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		// Inflate the menu; this adds items to the action bar if it is present.

		getMenuInflater().inflate(R.menu.main, menu);

		return true;

	}

	//连接activity和service的桥梁

	private ServiceConnection connection=new ServiceConnection(){

		@Override

		public void onServiceConnected(ComponentName arg0, IBinder iBinder) {

			//连接

				//获得LocalBinder

				 binder=(LocalBinder)iBinder;

				//获得MyService实例

				myService=binder.getService();

			flag=true;

		}

		@Override

		public void onServiceDisconnected(ComponentName arg0) {

			//不连接

				flag=false;

		}};

}

service端：

/**

 *Version:

 *author:YangQuanqing

 *Data:

 */

package com.example.android_service_trance;

import java.util.Random;

import android.app.Service;

import android.content.Intent;

import android.os.Binder;

import android.os.IBinder;

import android.os.Parcel;

import android.os.RemoteException;

import android.util.Log;

/**

 * @author YangQuanqing yqq

 *

 */

public class MyService extends Service {

	//定义一个随机数用于測试

	private Random random=new Random();

	private LocalBinder lb=new LocalBinder();

	//获得当前类的实例

	public class LocalBinder extends Binder{

		public MyService getService()

		{

			return MyService.this;

		}

		@Override

		protected boolean onTransact(int code, Parcel data, Parcel reply,

				int flags) throws RemoteException {

			//Activity里获取数据

			Log.i("SERVICE<<<<<<<<",data.readString());

			Log.i("SERVICE<<<<<<<<<",data.readInt()+"");

			reply.writeString("小名");

			reply.writeInt(1990);

			return super.onTransact(code, data, reply, flags);

		}

	}

	@Override

	public void onCreate() {

		// TODO Auto-generated method stub

		super.onCreate();

	}

	@Override

	public void onDestroy() {

		// TODO Auto-generated method stub

		super.onDestroy();

	}

	@Override

	public IBinder onBind(Intent intent) {

		// TODO Auto-generated method stub

		return lb;

	}

	//获得一个随机数

	public int getRandom()

	{

		return random.nextInt(22);

	}

}