Android Three implementation of the timer detailed and implementation methods _android

method One: Handler+thread

Package Com.xunfang.handerDemo; 
Import android.app.Activity; 
Import Android.os.Bundle; 
Import Android.os.Handler; 
Import Android.os.Message; 
 
Import Android.widget.TextView; 
 /** * Handler Timer * * * * @author smalt * */public class Handerdemoactivity extends activity {TextView tvshow; 
 
 private int i = 0; 
  @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
  Setcontentview (R.layout.main); 
  Tvshow = (TextView) Findviewbyid (r.id.tv_show); 
 New Thread (New Threadshow ()). Start (); The//Handler class receives data Handler Handler = new Handler () {public void Handlemessage (msg) {if (Msg.what = = 
    1) {Tvshow.settext (integer.tostring (i++)); 
   SYSTEM.OUT.PRINTLN ("Receive ..."); 
 } 
  }; 
 
 }; Thread Classes Class Threadshow implements Runnable {@Override public void run () {//TODO auto-generated Method St 
     UB while (true) {try {thread.sleep (1000); Message msg = new MessAge (); 
     Msg.what = 1; 
     Handler.sendmessage (msg); 
    SYSTEM.OUT.PRINTLN ("Send ..."); 
     catch (Exception e) {//TODO auto-generated catch block E.printstacktrace (); 
    SYSTEM.OUT.PRINTLN ("Thread error ..."); 

 } 
   } 
  } 
 } 
}

Method Two: Handler class postdelyed

Package Com.xunfang.handerDemo; 
Import android.app.Activity; 
Import Android.os.Bundle; 
Import Android.os.Handler; 
 
Import Android.widget.TextView; /** * Handler timer using postdelyed implementation * * @author Smalt * */public class Handerdemoactivity extends activity {Text 
 View tvshow; 
 private int i = 0; 
 
 private int time = 1000; 
  @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
  Setcontentview (R.layout.main); 
  Tvshow = (TextView) Findviewbyid (r.id.tv_show); Handler.postdelayed (runnable, time); 
 every 1s execution} Handler Handler = new Handler (); Runnable Runnable = new Runnable () {@Override public void run () {//handler own method implementation timer try {handler. 
    Postdelayed (this, time); 
    Tvshow.settext (integer.tostring (i++)); 
   System.out.println ("do ..."); 
    catch (Exception e) {//TODO auto-generated catch block E.printstacktrace (); 
   SYSTEM.OUT.PRINTLN ("Exception ..."); 
 
} 
  } 
 };} 
 

method Three: Handler+timer+timertask

Package Com.xunfang.handerDemo; 
Import Java.util.Timer; 
 
Import Java.util.TimerTask; 
Import android.app.Activity; 
Import Android.os.Bundle; 
Import Android.os.Handler; 
Import Android.os.Message; 
 
Import Android.widget.TextView; 
 /** * Timer Implementation: Handler+timer+timertask * * @author smalt * */public class Handerdemoactivity extends activity { 
 TextView tvshow; 
 private int i = 0; 
 
 private int time = 1000; 
  @Override public void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
  Setcontentview (R.layout.main); 
  Tvshow = (TextView) Findviewbyid (r.id.tv_show); Timer.schedule (Task, 1000, 1000); 1s execute task after 1s execute again} Handler Handler = new Handler () {public void Handlemessage (msg) {if (MSG.WH 
   at = = 1) {Tvshow.settext (integer.tostring (i++)); 
  Super.handlemessage (msg); 
 }; 
 }; 
 Timer timer = new timer (); TimerTask task = new TimerTask () {@Override public void run () {//What needs to be done: send a message 
   Message message = new Message (); 
   Message.what = 1; 
  Handler.sendmessage (message); 
} 
 }; 
 }

Above is on the Android timer data collation follow-up to continue to supplement the relevant knowledge, thank you for your support to this site!