Android实现简易闹钟功能

本文实例为大家分享了android通过广播来实现闹钟的具体代码，供大家参考，具体内容如下

1.创建广播接收repeatingalarm.java

import android.content.broadcastreceiver;
import android.content.context;
import android.content.intent;
import android.util.log;

public class repeatingalarm extends broadcastreceiver{

  @override
  public void onreceive(context context, intent intent) {
    if (intent.getaction()!=null&&intent.getaction().equals("com.gcc.alarm")) {//自定义的action
      intent = new intent(context,alarmactivity.class);
      intent.setflags(intent.flag_activity_new_task);
      context.startactivity(intent);
    }
  }
}

2.广播在manifest.xml中配置：

<receiver 
 android:name=".repeatingalarm"
  >
   <intent-filter > 
      <action android:name="com.gcc.alarm"/> 
     </intent-filter> 
</receiver>

3.通过代码设置一个闹钟

intent intent = new intent(this, repeatingalarm.class);
intent.setaction("com.gcc.alarm");
pendingintent sender = pendingintent.getbroadcast(this, 0, intent, 0);
// schedule the alarm!
alarmmanager am = (alarmmanager)getsystemservice(alarm_service);
          am.set(alarmmanager.rtc,
              c.gettimeinmillis(), sender);//c为设置闹钟的时间的calendar对象

4.通过代码取消一个闹钟：

/**
 * 取消闹钟
 */
private void canclealarm(){
  intent intent = new intent(alarmactivity.this,repeatingalarm.class);
  intent.setaction("com.gcc.alarm");
  pendingintent sender = pendingintent.getbroadcast(alarmactivity.this, 0, intent, 0);
  // and cancel the alarm.
  alarmmanager am = (alarmmanager)getsystemservice(alarm_service);
   am.cancel(sender);//取消闹钟
  }

5.闹钟响是弹出的对化框并播放音乐用alarmactivity.java类实现

import android.app.activity;
import android.app.alarmmanager;
import android.app.alertdialog;
import android.app.pendingintent;
import android.content.context;
import android.content.dialoginterface;
import android.content.intent;
import android.content.res.assetfiledescriptor;
import android.media.mediaplayer;
import android.os.bundle;

public class alarmactivity extends activity {

  mediaplayer mp;

  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.aty_alarm);
    mp = new mediaplayer();
    assetfiledescriptor file = getresources().openrawresourcefd(r.raw.beep);
    try {
      mp.setdatasource(file.getfiledescriptor(), file.getstartoffset(),
          file.getlength());
      mp.prepare();
      file.close();
    } catch (ioexception e) {
      e.printstacktrace();
    }
    mp.setvolume(0.5f, 0.5f);
    mp.setlooping(true);
    mp.start();
    alarmoialog();
  }

  @override
  protected void onresume() {
    super.onresume();
  }

  @override
  protected void ondestroy() {
    super.ondestroy();
    if (mp != null) {
      if (mp.isplaying()) {
        mp.stop();
      }
      mp.release();
    }
  }

  public void alarmoialog() {
    alertdialog.builder builder = new alertdialog.builder(this);
    builder.setmessage("你有未处理的事件");
    builder.setpositivebutton("稍后提醒",
        new dialoginterface.onclicklistener() {

          @override
          public void onclick(dialoginterface dialoginterface, int i) {
            alarm();
            finish();
          }
        });

    builder.setnegativebutton("停止", new dialoginterface.onclicklistener() {

      @override
      public void onclick(dialoginterface dialoginterface, int i) {
        canclealarm();
        finish();// 关闭窗口
      }
    });
    builder.show().setcanceledontouchoutside(false);
    ;

  }

  /**
   * 取消闹钟
   */
  private void canclealarm() {
    // create the same intent, and thus a matching intentsender, for
    // the one that was scheduled.
    intent intent = new intent(alarmactivity.this, repeatingalarm.class);
    intent.setaction("com.gcc.alarm");
    pendingintent sender = pendingintent.getbroadcast(alarmactivity.this,
        0, intent, 0);

    // and cancel the alarm.
    alarmmanager am = (alarmmanager) getsystemservice(alarm_service);
    am.cancel(sender);
  }

  private void alarm() {
    // 获取系统的闹钟服务
    alarmmanager am = (alarmmanager) getsystemservice(context.alarm_service);
    // 触发闹钟的时间（毫秒）
    long triggertime = system.currenttimemillis() + 10000;
    intent intent = new intent(this, repeatingalarm.class);
    intent.setaction("com.gcc.alarm");
    pendingintent op = pendingintent.getbroadcast(this, 0, intent, 0);
    // 启动一次只会执行一次的闹钟
    am.set(alarmmanager.rtc, triggertime, op);
    // 指定时间重复执行闹钟
    // am.setrepeating(alarmmanager.rtc,triggertime,2000,op);
  }

}

6.注：

1.aty_alarm.xml为空布局，不需添加任何组件
2.使用mediaplayer播放res/raw目录下音频文件的方法如下：

mp = new mediaplayer();
    assetfiledescriptor file = getresources().openrawresourcefd(r.raw.beep);
    try {
      mp.setdatasource(file.getfiledescriptor(), file.getstartoffset(),
          file.getlength());

7.功能不是很完善，需要的可以修改使用，闹钟时间设定可通过上篇博文来获取calendar对象。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。