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：

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());