Android 闹钟实现

首先AndroidManifest.xml

<!-- 在其它应用上显示的权限  -->    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

<!-- android:process=":remote" 新开一个进程 -->        <receiver android:name=".AlarmReceiver" android:process=":remote" /> 

AlarmTool.java

package com.zc.test;import java.util.Calendar;import java.util.Locale;import android.app.AlarmManager;import android.app.AlertDialog;import android.app.PendingIntent;import android.app.TimePickerDialog;import android.app.AlertDialog.Builder;import android.content.Context;import android.content.DialogInterface;import android.content.DialogInterface.OnClickListener;import android.content.Intent;import android.util.Log;import android.view.WindowManager;import android.widget.TimePicker;import android.widget.Toast;public class AlarmTool{//设置闹钟public void setAlarm(final Context context){Log.d("zc", "设置闹钟");  //获取日历实例对象final Calendar calendar = Calendar.getInstance(Locale.CHINESE);//设置日历时间为当前系统时间calendar.setTimeInMillis(System.currentTimeMillis());//MyTimePickerDialog为 自定义TimePickerDialog 为了解决TimePickerDialog的bug    MyTimePickerDialog mt = new MyTimePickerDialog(context,new TimePickerDialog.OnTimeSetListener() {    @Overridepublic void onTimeSet(TimePicker arg0, int hourOfDay, int minute) {// TODO onTimeSet();//设置日历的时间，主要是让日历的年月日和当前同步              calendar.setTimeInMillis(System.currentTimeMillis());             //设置时间//            calendar.add(Calendar.SECOND, 5);//            calendar.add(Calendar.MINUTE, 30);            //设置日历的小时和分钟              calendar.set(Calendar.HOUR_OF_DAY, hourOfDay);              calendar.set(Calendar.MINUTE, minute);              //将秒和毫秒设置为0  //            calendar.set(Calendar.SECOND, 0);  //            calendar.set(Calendar.MILLISECOND, 0);              //建立Intent和PendingIntent来调用闹钟管理器              Intent intent = new Intent(context,AlarmReceiver.class);             //pendingIntent 待定的Intent 不会立刻执行            PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);              //获取闹钟管理器              AlarmManager alarmManager = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);             //设置闹钟,AlarmManager.RTC_WAKEUP表示闹钟在睡眠状态下会唤醒系统并执行提示功能,该状态下闹钟使用绝对时间,状态值为0.            alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);             //设置闹钟 setRepeating 重复闹钟//            alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), 10*1000, pendingIntent);              Toast.makeText(context, "设置闹钟的时间为："+String.valueOf(hourOfDay)+":"+String.valueOf(minute), Toast.LENGTH_SHORT).show();}},calendar.get(Calendar.HOUR_OF_DAY),calendar.get(Calendar.MINUTE),true);    mt.setButton(DialogInterface.BUTTON_NEUTRAL, "cancle", new OnClickListener() {    //取消按钮@Overridepublic void onClick(DialogInterface arg0, int arg1) {}});    mt.show();    }//TODO timeOutShow();public void timeOutShow(Context con){Log.i("zc", "timeOutShow");AlertDialog.Builder ader =  new Builder(con);ader.setTitle("Time Out:").setMessage("时间用完了").setNegativeButton("取消", new DialogInterface.OnClickListener(){@Overridepublic void onClick(DialogInterface arg0, int arg1) {} });//设置Type属性才能在Receiver中调用AlertDialog ad = ader.create();ad.getWindow().setType( WindowManager.LayoutParams.TYPE_SYSTEM_ALERT );ad.show();}//自定义TimePickerDialog,//Android的版本bug,TimePickerDialog在结束时必定会调用onTimeSet();//点击按钮,或者空白处都会调用onTimeSet(),点击按钮会多调用一次,即效果为有两个同时间的闹钟class MyTimePickerDialog extends TimePickerDialog{public MyTimePickerDialog(Context context, OnTimeSetListener onTimeSetListener,int hourOfDay, int minute, boolean is24HourView) {super(context, onTimeSetListener, hourOfDay, minute, is24HourView);}//复写onStop(); 注掉super.onStop();  否则onTimeSet()会执行两次@Overrideprotected void onStop(){//super.onStop();}}}

AlarmRecevice.java

package com.zc.test;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;import android.widget.Toast;public class AlarmReceiver extends BroadcastReceiver{@Overridepublic void onReceive(Context con, Intent arg1) {// TODO Auto-generated method stubLog.i("zc", "onReceive");Toast.makeText(con, "alarmTimeOut", Toast.LENGTH_SHORT).show();new AlarmTool().timeOutShow(con);    }}

如果要固定闹钟时间,比如30min

直接用onClickListener();  不需要设置时间onTimeSet();