Android编程闹钟设置方法详解

程序员文章站 2024-03-02 21:28:34

本文实例讲述了android编程闹钟设置方法。分享给大家供大家参考，具体如下：闹钟在生活中最常见了，在android中可以通过alarmmanager来实现闹钟，ala...

本文实例讲述了android编程闹钟设置方法。分享给大家供大家参考，具体如下：

闹钟在生活中最常见了，在android中可以通过alarmmanager来实现闹钟，alarmmanager类专门用来设置在某个指定的时间去完成指定的时间。alarmmanager就会通过onreceive()方法去执行这些事件，就算系统处于待机状态，同样不会影响运行。可以通过context.getsystemservice方法来获得该服务。alarmmanager中的方法不少，如下：

方法	说明
cancel	取消alarmmanager服务
set	设置alarmmanager服务
setinexactrepeating	设置不精确周期
setrepeating	设置重复周期
settimezone	设置时区

要实现闹钟，首先需要创建一个继承自broadcastreceiver的类，实现onreceive方法来接受这个alarm服务，然后通过建立intent和pendingintent连接来调用alarm组件。通过timerpickerdialog来设置闹铃时间，当时间到了我们指定的时间后onreceiver方法接受到alarm服务后的界面。

首先实现接受alarm服务的alarmreceiver类，用toast类提示用户

public class alarmreceiver extends broadcastreceiver {
  @override
  public void onreceive(context arg0, intent arg1) {
    // todo auto-generated method stub
    toast.maketext(arg0, "你设置的闹铃时间到了", toast.length_long).show();
  }
}

由于使用了broadcastreceiver服务，因此需要再androidmanifest.xml中进行声明：

<receiver
  android:name=".alarmreceiver"
  android:process=":remote">
</receiver>

然后需要设置闹铃和取消闹铃的时间进行监听：

package cn.edu.pku;
import java.util.calendar;
import android.app.activity;
import android.app.alarmmanager;
import android.app.pendingintent;
import android.app.timepickerdialog;
import android.content.intent;
import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.textview;
import android.widget.timepicker;
public class alarmactivity extends activity {
  /** called when the activity is first created. */
  button mbutton1;
  button mbutton2;
  textview mtextview;
  calendar calendar;
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    calendar=calendar.getinstance();
    mtextview=(textview)findviewbyid(r.id.textview01);
    mbutton1=(button)findviewbyid(r.id.button01);
    mbutton2=(button)findviewbyid(r.id.button02);
    mbutton1.setonclicklistener(new view.onclicklistener() {
      public void onclick(view v) {
        // todo auto-generated method stub
        calendar.settimeinmillis(system.currenttimemillis());
        int hour = calendar.get(calendar.hour_of_day);
        int minute = calendar.get(calendar.minute);
        new timepickerdialog(alarmactivity.this, new timepickerdialog.ontimesetlistener() {
          public void ontimeset(timepicker view, int hourofday, int minute) {
            // todo auto-generated method stub
            calendar.settimeinmillis(system.currenttimemillis());
            calendar.set(calendar.hour_of_day, hourofday);
            calendar.set(calendar.minute, minute);
            calendar.set(calendar.second, 0);
            calendar.set(calendar.millisecond, 0);
            intent intent = new intent(alarmactivity.this, alarmreceiver.class);
            pendingintent pendingintent = pendingintent.getbroadcast(alarmactivity.this, 0, intent, 0);
            alarmmanager alarmmanager = (alarmmanager)getsystemservice(alarm_service);
            alarmmanager.set(alarmmanager.rtc_wakeup, calendar.gettimeinmillis(), pendingintent);
            alarmmanager.setrepeating(alarmmanager.rtc_wakeup, system.currenttimemillis() + (10 * 1000),
                (24 * 60 * 60 * 1000), pendingintent);
            string tmps = "设置闹钟时间为" + format(hourofday) + ":" +format(minute);
            mtextview.settext(tmps);
          }
        }, hour, minute, true).show();
      }
    });
    mbutton2.setonclicklistener(new view.onclicklistener() {
      public void onclick(view v) {
        // todo auto-generated method stub
        intent intent = new intent(alarmactivity.this, alarmreceiver.class);
        pendingintent pendingintent = pendingintent.getbroadcast(alarmactivity.this, 0, intent, 0);
        alarmmanager alarmmanager = (alarmmanager)getsystemservice(alarm_service);
        alarmmanager.cancel(pendingintent);
        mtextview.settext("闹铃已取消！");
      }
    });
  }
  private string format(int time){
    string str = "" + time;
    if(str.length() == 1){
      str = "0" + str;
    }
    return str;
  }
}

效果如下：

设置闹铃

Android编程闹钟设置方法详解