Android Learning Note-service

* 1.Service is an application component

* 2.Service No graphical interface

* 3.Service is typically used to handle some long-consuming operations

* 4. You can use service update ContentProvider, send intent and boot system notifications, etc.

*

* 1.Service is not a separate process

* 2.Service is not a thread

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Interface Activity_main.xml

    <button          android:id= "@+id/startbutton"         android:layout_ Width= "Fill_parent"         android:layout_height= "Wrap_content"          android:text= "Start service"/>             <Button          Android:id= "@+id/stopbutton"         android:layout_width= "Fill_parent"         android:layout_height= "Wrap_content"          android:layout_below= "@id/startbutton"          android:text= "Stop service"/> 

Firstservice.java

public class FirstService extends service{@Overridepublic ibinder onbind (Intent Intent) {System.out.println ("Service Onbind "); return null;} @Overridepublic void OnCreate () {super.oncreate (); System.out.println ("Service onCreate");} @Overridepublic int Onstartcommand (Intent Intent, int flags, int startid) {System.out.println ("flags-->" + flags); System.out.println ("startid-->" + Startid); System.out.println ("Service Onstartcommand"); return Super.onstartcommand (Intent, flags, Startid);} @Overridepublic void OnDestroy () {System.out.println ("Service OnDestroy"); Super.ondestroy ();}}

mainactivity.java

Public class mainactivity extends activity {/** * 1.service is an application component  *  2.service does not have a graphical interface  * 3.service is often used to handle some long-time operation  * 4. You can use the service update ContentProvider. Send intent and boot system notifications etc.  *  * 1.service is not a separate process  * 2.service not a thread  *   *  start Context.startservice ()  *  stop Context.stopservice ()  *  Activity inherits from the context so you can call the StartService () and StopService () methods directly  */private button startbutton;private  Button stopButton; @Overrideprotected  void oncreate (bundle savedinstancestate)  { Super.oncreate (savedinstancestate); Setcontentview (R.layout.activity_main);startbutton =  (Button)  findviewbyid (R.id.startbutton);stopbutton =  (Button)  findviewbyid (R.id.stopButton); Startbutton.setonclicklistener (New startservicelistener ()); Stopbutton.setonclicklistener (new  Stopservicelistener ());} Class startservicelistener implements onclicklistener{@Overridepublic  void onclick (view v)  {Intent intent  = new intent (); Intent.setclass (Mainactivity.this, firstservice.class); StartService (Intent);}} class stopservicelistener implements onclicklistener{@Overridepublic  void onclick ( VIEW V)  {intent intent = new intent (); Intent.setclass (MainActivity.this,  Firstservice.class); StopService (intent);}}

Click the "Start Service" button, then click on the "Stop Service" button, the output of the console is as follows

11-26 12:42:27.697:i/system.out (1347): Service onCreate

11-26 12:42:35.057:i/system.out (1347): flags-->0

11-26 12:42:35.461:i/system.out (1347): startid-->1

11-26 12:42:35.937:i/system.out (1347): Service Onstartcommand

11-26 12:43:07.969:i/system.out (1347): Service OnDestroy

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Android Learning Note-service