一般情况下我们使用startService(Intent service)来启动一个服务,但这种情况下无法得到Service对象的引用,通过bindService方法启动服务则可以实现此功能。下面给一个小例子演示一下:
1.调用者
package com.zhf.local; 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; /** * 此例的目的就是拿到MyService的引用,从而可以引用其内部的方法和变量 * @author Administrator * */ public class LocalServiceActivity extends Activity { /** Called when the activity is first created. */ private MyService myService; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Intent intent = new Intent(this, MyService.class); bindService(intent, connection, Context.BIND_AUTO_CREATE); } private ServiceConnection connection = new ServiceConnection() { @Override public void onServiceDisconnected(ComponentName name) { myService = null; } @Override public void onServiceConnected(ComponentName name, IBinder service) { myService = ((MyService.MyBinder) service).getService(); System.out.println("Service连接成功"); //执行Service内部自己的方法 myService.excute(); } }; protected void onDestroy() { super.onDestroy(); unbindService(connection); }; }
2:Service
package com.zhf.local; import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; public class MyService extends Service { private final IBinder binder=new MyBinder(); @Override public IBinder onBind(Intent intent) { return binder; } public class MyBinder extends Binder{ MyService getService(){ return MyService.this; } } public void excute(){ System.out.println("通过Binder得到Service的引用来调用Service内部的方法"); } @Override public void onDestroy() { //当调用者退出(即使没有调用unbindService)或者主动停止服务时会调用 super.onDestroy(); } @Override public boolean onUnbind(Intent intent) { //当调用者退出(即使没有调用unbindService)或者主动停止服务时会调用 System.out.println("调用者退出了"); return super.onUnbind(intent); } }转载自http://que2010.iteye.com/blog/1339791