android开发分享Android常用定时器的实现方式

public class handlerandsleep {        // 1、定义一个handler类，用于处理接受到的message.      handler handler = new handler(looper.getmainlooper()) {          @override          public void handlemessage(@nonnull message msg) {              super.handlemessage(msg);              // do something eg.              log.d("handlerandsleep", "handlerandsleep");          }      };        // 2、新建一个实现runnable接口的线程类      class mythread implements runnable {          @override          public void run() {              while (true) {                  try {                      thread.sleep(10000);                      message message = new message();                      message.what = 1;                      handler.sendmessage(message);                  } catch (exception e) {                      e.printstacktrace();                  }              }          }      }        public handlerandsleep() {          //3、在需要启动线程的地方加入下面语句,启动线程后，线程每10s发送一次消息          new thread(new mythread()).start();      }  }  

public class handleandpostdelayed {        handler handler = new handler(){          @override          public boolean sendmessageattime(@nonnull message msg, long uptimemillis) {              log.d("handleandpostdelayed", "handleandpostdelayed");              return super.sendmessageattime(msg, uptimemillis);          }      };        runnable runnable = new runnable() {          @override          public void run() {              // do something              handler.postdelayed(this, 2000);          }      };        handleandpostdelayed() {      	// 开启定时器          handler.postdelayed(runnable, 2000);  		// 停止定时器  //        handler.removecallbacks(runnable);      }  }  

public class handlerandtimer {        private final timer timer = new timer();      private timertask task;      handler handler = new handler() {            @override          public void handlemessage(@nonnull message msg) {              // do something              log.d("handlerandtimer", "handlerandtimer");              super.handlemessage(msg);          }      };        public handlerandtimer() {          task = new timertask() {              @override              public void run() {                  message message = new message();                  message.what = 1;                  handler.sendmessage(message);              }          };          //启动定时器 参数对应为 timertask 延迟时间 间隔时间          timer.schedule(task, 2000, 2000);      }  }  

public class mainactivity extends appcompatactivity {        handler handler = new handler() {          @override          public void handlemessage(@nonnull message msg) {              tcount++;              timertv.settext(tcount+"");              super.handlemessage(msg);          }      };        timer timer = new timer();      int tcount = 0;      int scount = 0;      textview timertv;      textview servicetv;        string alarm_receiver_action = "com.yh.study.alarmreceiver";      @override      protected void oncreate(bundle savedinstancestate) {          super.oncreate(savedinstancestate);          setcontentview(r.layout.activity_main);          timertv = findviewbyid(r.id.timer_tv);          servicetv = findviewbyid(r.id.service_tv);            timer.schedule(new timertask() {              @override              public void run() {                  handler.sendemptymessage(0);              }          }, 2*1000, 5*1000);            alarmreceiver alarmreceiver = new alarmreceiver(new handler() {              @override              public void handlemessage(@nonnull message msg) {                  scount++;                  servicetv.settext(scount+"");                  super.handlemessage(msg);              }          });          intentfilter intentfilter = new intentfilter();          intentfilter.addaction(alarm_receiver_action);          registerreceiver(alarmreceiver, intentfilter);            intent intent = new intent(alarm_receiver_action);          pendingintent pendingintent = pendingintent.getbroadcast(mainactivity.this, 0, intent, 0);  //          alarmmanager alarmmanager = (alarmmanager) getsystemservice(alarm_service);          alarmmanager.setexactandallowwhileidle(alarmmanager.elapsed_realtime_wakeup, systemclock.elapsedrealtime(),                  pendingintent);      }  }  

public class alarmreceiver extends broadcastreceiver {      handler handler;      alarmreceiver(handler handler) {          this.handler = handler;      }        @override      public void onreceive(context context, intent intent) {          log.d("onreceive", "onreceive");          handler.sendemptymessage(0);          intent serviceintent = new intent(context, myservice.class);          context.startservice(serviceintent);      }  }  

public class myservice extends intentservice {      public myservice() {          super("myservice");      }        @override      protected void onhandleintent(@nullable intent intent) {          alarmmanager alarmmanager = (alarmmanager) getsystemservice(context.alarm_service);            intent alarmintent = new intent("com.yh.study.alarmreceiver");          pendingintent pendingintent = pendingintent.getbroadcast(this, 0, alarmintent, 0);          alarmmanager.setexactandallowwhileidle(alarmmanager.rtc_wakeup, system.currenttimemillis()+5*1000,                  pendingintent);      }  }  

private final timer timer = new timer();  private timertask task;  handler handler = new handler() {      @override      public void handlemessage(message msg) {          // todo auto-generated method stub          // 要做的事情          super.handlemessage(msg);      }  };  

task = new timertask() {      @override      public void run() {          // todo auto-generated method stub          message message = new message();          message.what = 1;          handler.sendmessage(message);      }  };  

timer.schedule(task, 2000, 2000);