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service与activity交互的方式有多种,这里说说使用messenger来实现两者之间的交互。
service程序:
public class messengerservice extends service { final messenger mmessenger = new messenger(new incominghandler()); @override public ibinder onbind(intent intent) { return mmessenger.getbinder(); } @suppresslint("handlerleak") class incominghandler extends handler { @override public void handlemessage(message msg) { switch (msg.what) { case 0: toast.maketext(messengerservice.this,"hello lenve!", toast.length_long).show(); break; case 1: toast.maketext(messengerservice.this,"hello lenve!hello world!", toast.length_long).show(); break; default: break; } } } }
mainactivity.javal:
public class mainactivity extends activity { private messenger mmessenger; private serviceconnection conn; private intent intent; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); intent = new intent(this,messengerservice.class); conn = new serviceconnection() { @override public void onservicedisconnected(componentname name) { mmessenger = null; } @override public void onserviceconnected(componentname name, ibinder service) { mmessenger = new messenger(service); } }; } @override protected void onstart() { super.onstart(); bindservice(intent, conn, bind_auto_create); } @override protected void onstop() { super.onstop(); unbindservice(conn); } public void onclick(view v){ message msg = null; switch (v.getid()) { case r.id.button1: msg = message.obtain(null, 0, 0, 0); try { mmessenger.send(msg); } catch (remoteexception e) { e.printstacktrace(); } break; case r.id.button01: msg = message.obtain(null, 1, 0, 0); try { mmessenger.send(msg); } catch (remoteexception e) { e.printstacktrace(); } break; default: break; } } }
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