Android - 如何将闹钟设置为特定日期

Question

我已经看过很多教程并尝试了 2 个小时，但仍然有问题。我现在很紧张 :) 我想设置闹钟，例如到16:25就出发了，但什么也没有发生。我有这个代码：

   Calendar cur_cal = new GregorianCalendar();
    cur_cal.setTimeInMillis(System.currentTimeMillis());

    Calendar cal = new GregorianCalendar();
    cal.add(Calendar.DAY_OF_YEAR, cur_cal.get(Calendar.DAY_OF_YEAR));
    cal.set(Calendar.HOUR_OF_DAY, 16);
    cal.set(Calendar.MINUTE, 25);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);

    alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);

我也试过这个：

 cal.set(Calendar.AM_PM, cur_cal.get(Calendar.AM_PM));
    cal.set(Calendar.HOUR, 4);

我的最终目标是让它成为一个重复的警报，例如它应该每天在设定的时间关闭。

更新 01.17.2011。还是行不通。我有这个代码：

           Calendar cal = Calendar.getInstance();
            cal.set(Calendar.YEAR, 2011);
            cal.set(Calendar.MONTH, Calendar.JANUARY); 
            cal.set(Calendar.DAY_OF_MONTH, 17);
            cal.set(Calendar.HOUR_OF_DAY, 16);
            cal.set(Calendar.MINUTE, 58);
         cal.set(Calendar.SECOND, 0);
          cal.set(Calendar.MILLISECOND, 0);

我也试过这个：

 cal.set(Calendar.HOUR, 4);
 cal.set(Calendar.AM_PM, Calendar.PM);

还有这个：

cal.set(Calendar.HOUR_OF_DAY, 4 );
            cal.set(Calendar.AM_PM, Calendar.PM);

Answer 1

通常你不应该像你一样获得Calendar，有Calendar.getInstance()方法：

Calendar cal = Calendar.getInstance();

这为您提供了一个所有字段都设置为当前日期的日历，然后只需：

cal.set(Calendar.HOUR_OF_DAY, 16);
cal.set(Calendar.MINUTE, 25);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MILLISECOND, 0);

alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);

Answer 2

package your.pack.name;

import java.util.Calendar;

import android.app.Activity;
import android.app.AlarmManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;

public class AlarmActivity extends Activity {
    /** Called when the activity is first created. */

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

        Calendar cal = Calendar.getInstance();

        cal.setTimeInMillis(System.currentTimeMillis());
        cal.clear();
        cal.set(2012,2,8,18,16);

        AlarmManager alarmMgr = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        Intent intent = new Intent(this, AlarmReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
       // cal.add(Calendar.SECOND, 5);
        alarmMgr.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingIntent);


    }
}

Answer 3

以下代码非常适合警报。 我在这里提到的日期和时间是：2012-6-28，11:20:00 AM。 最重要的是，月份仅从 0 t0 11 指定。表示六月应由 5 指定。

        AlarmManager objAlarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);              
        Calendar objCalendar = Calendar.getInstance();
        objCalendar.set(Calendar.YEAR, 2012);
        //objCalendar.set(Calendar.YEAR, objCalendar.get(Calendar.YEAR));
        objCalendar.set(Calendar.MONTH, 5);
        objCalendar.set(Calendar.DAY_OF_MONTH, 28);
        objCalendar.set(Calendar.HOUR_OF_DAY, 11);
        objCalendar.set(Calendar.MINUTE, 20);
        objCalendar.set(Calendar.SECOND, 0);
        objCalendar.set(Calendar.MILLISECOND, 0);
        objCalendar.set(Calendar.AM_PM, Calendar.AM);         

        Intent alamShowIntent = new Intent(this,AlarmActivity.class);
        PendingIntent alarmPendingIntent = PendingIntent.getActivity(this, 0,alamShowIntent,0 );

        objAlarmManager.set(AlarmManager.RTC_WAKEUP,objCalendar.getTimeInMillis(), alarmPendingIntent);