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Alarm的简单使用

MainActivity.java代码如下：

    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 MainActivity extends Activity {

    private TextView tv = null;  
    private Button setTime,cancelTime;  
    private Calendar c = null;  

    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);

        //判断是否是从点击通知触发的
        String alarm = getIntent().getStringExtra("alarm");
        if(alarm != null&&alarm.equals("alarm")){
            //关闭音乐
            stopService(new Intent("com.yqy.yqy_alarm.MUSIC"));  
        }

        tv = (TextView)findViewById(R.id.tv);  
        setTime = (Button)findViewById(R.id.setAlarm);  //设置闹钟
        cancelTime = (Button)findViewById(R.id.cancelAlarm);  //取消闹钟
        //得到日历实例，主要是为了下面的获取时间  
        c = Calendar.getInstance();  
        setTime.setOnClickListener(new Button.OnClickListener()  
        {  

            @Override  
            public void onClick(View arg0) {  
                c.setTimeInMillis(System.currentTimeMillis());  
                int hour = c.get(Calendar.HOUR_OF_DAY);  
                int minute = c.get(Calendar.MINUTE);  
                new TimePickerDialog(MainActivity.this, minute, new TimePickerDialog.OnTimeSetListener() {  
                    @Override  
                    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {  
                        //是设置日历的时间，主要是让日历的年月日和当前同步  
                        c.setTimeInMillis(System.currentTimeMillis());  
                        //设置小时分钟，秒和毫秒都设置为0  
                        c.set(Calendar.HOUR_OF_DAY, hourOfDay);  
                        c.set(Calendar.MINUTE, minute);  
                        c.set(Calendar.SECOND, 0);  
                        c.set(Calendar.MILLISECOND, 0);  

                        int requestCode = 0;//闹钟的唯一标示
                        Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);  
                        intent.putExtra("requestCode", requestCode);
                        PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, requestCode, intent, 0);  
                        //得到AlarmManager实例  
                        AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);  
                        //根据当前时间预设一个警报  
//                        am.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pi);  
                        /** 
                         * 第一个参数是警报类型；第二个参数是第一次执行的延迟时间，可以延迟，也可以马上执行；第三个参数是重复周期为一天 
                         * 这句话的意思是设置闹铃重复周期，也就是执行警报的间隔时间 
                         */  
//                      am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+(60*1000),   
//                              (24*60*60*1000), pi);  
                        am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(),   
                                1000*60*5, pi);  

                        String msg = hourOfDay+":"+minute;  
                        tv.setText("当前设置的闹钟时间："+msg);  
                    }  
                }, hour, minute, true).show();  
                //上面的TimePickerDialog中的5个参数参考：http://blog.csdn.net/yang_hui1986527/article/details/6839342  
            }  

        });  

        cancelTime.setOnClickListener(new Button.OnClickListener()  
        {  

            @Override  
            public void onClick(View v) {  
                Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);  
                PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0,  
                        intent, 0);  
                AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);  
                //取消闹钟  
                am.cancel(pi);  
                tv.setText("闹钟取消");  
                //取消闹钟的同时取消音乐  
                stopService(new Intent("com.yqy.yqy_alarm.MUSIC"));  
            }  

        });  
    }  
}  

AlarmReceiver闹钟接收器

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