Service1

原来 service 是指界面被关掉 还能继续运行的意思，运行在后台。

startservice
stopservice

绑定服务(关闭界面，会退出当前的app)

bindservice
unbindservice

基本用法如下：
package zhbit.test;

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.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class Using_ServiceActivity extends Activity implements OnClickListener, ServiceConnection {
/* Called when the activity is first created. /
private Button btnstartservice, btnstopservice, btnbindservice,
btnunbindservice;
private Intent intent1;

@Overridepublic void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    intent1 = new Intent(Using_ServiceActivity.this, Second.class);    btnstartservice = (Button) findViewById(R.id.StartService);    btnstopservice = (Button) findViewById(R.id.stopService);    btnbindservice = (Button) findViewById(R.id.BindService);    btnunbindservice = (Button) findViewById(R.id.UnBindService);    btnstartservice.setOnClickListener(this);    btnstopservice.setOnClickListener(this);    btnbindservice.setOnClickListener(this);    btnunbindservice.setOnClickListener(this);}public void onClick(View v) {    // TODO Auto-generated method stub    switch (v.getId()) {    case R.id.StartService:        startService(intent1);        break;    case R.id.stopService:        stopService(intent1);        break;    case R.id.BindService:        bindService(intent1, this, Context.BIND_AUTO_CREATE);        break;    case R.id.UnBindService:        unbindService(this);    //  stopService(intent1);        break;    default:        break;    }}public void onServiceConnected(ComponentName name, IBinder service) {    // TODO Auto-generated method stub    Toast.makeText(this, "onserviceconnected", Toast.LENGTH_LONG).show();}public void onServiceDisconnected(ComponentName name) {    // TODO Auto-generated method stub    Toast.makeText(this, "onservicedisconnected", Toast.LENGTH_LONG).show();}

}

---

package zhbit.test;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.widget.Toast;

public class Second extends Service{

@Overridepublic void onCreate() {    Toast.makeText(this, "onCreate", Toast.LENGTH_LONG).show();    System.out.print("onCrate");    super.onCreate();}@Overridepublic void onDestroy() {    Toast.makeText(this, "onDestroy", Toast.LENGTH_LONG).show();    System.out.print("onDestroy");    super.onDestroy();}private final EchServiceBinder echservicebinder = new EchServiceBinder();public class EchServiceBinder extends Binder{}@Overridepublic IBinder onBind(Intent intent) {    Toast.makeText(this, "onBind", Toast.LENGTH_LONG).show();    return echservicebinder;}

}