Question

我正试图在某个时间和日期发出警报或通知。我希望能够为数组中的特定日期提供多个警报。我不知道在哪里继续我的按钮工作：

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

    //Button button = (Button)findViewById(R.id.button1);
   // button.setOnClickListener(this);
    final CheckBox checkBox = (CheckBox) findViewById(R.id.checkBox1);
    final Button button = (Button) findViewById(R.id.button1);
    button.setOnClickListener(new View.OnClickListener()
    {
        public void onClick(View v) {

             if (checkBox.isChecked()) {



             }

        }

提前感谢您帮助我。

Answer 1

您将要使用Alarm Manager

这个tutorial是一个非常简单的例子，如何使用它。

另一个简单的exmaple将其分解为

的基本步骤

创建活动
创建BroadcastReceiver以处理事件

修改
要发出通知，请修改广播接收器以在收到警报事件时创建通知。

Android Status Notification Documentation很好地展示了创建通知的基本步骤。

获取对NotificationManager的引用

创建通知实例。然后，您可以定义图像，文本和时间，这只是当前时间，因为警报事件已定义何时关闭

定义通知内容，例如在cliked
时启动的消息和意图
致电通知

String ns = Context.NOTIFICATION_SERVICE;
NotificationManager mNotificationManager =（NotificationManager）receiverContext.getSystemService（ns）;

Notification notification = new Notification(R.drawable.notification_icon, "Hello", System.currentTimeMillis()); CharSequence contentTitle = "My notification"; CharSequence contentText = "Hello World!"; Intent notificationIntent = new Intent(receiverContext, TargetActivity.class); PendingIntent contentIntent = PendingIntent.getActivity(receiverContext, 0, notificationIntent, 0); notification.setLatestEventInfo(receiverContext, contentTitle, contentText, contentIntent); private static final int notificationID = 1; mNotificationManager.notify(notificationID, notification);

编辑2
Creating notification at specified time using Alarm Manager

Answer 2

您可以尝试这样：

ArrayList<Calendar> alarmTimes = getAlarmTimes(); //Make your own function which returns alarm times as an array of Calendar type

for(int i=0; i<alarmTimes.size(); i++)
{
    Intent intent = new Intent(this, YourClass.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), requestCode, intent, PendingIntent.FLAG_UPDATE_CURRENT | Intent.FILL_IN_DATA);
    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
    alarmManager.set(AlarmManager.RTC_WAKEUP, alarmTimes[i].getTimeInMillis(), pendingIntent);
}

如果您想独立处理每个警报，请为每个警报使用不同的 requestCode 。此外，您可能需要查看 alarmManager.set（）函数中使用的不同标志。根据您的应用需求进行修改。

http://developer.android.com/reference/android/app/PendingIntent.html

你必须制作一个AlarmReceiver类来处理警报响起时你想做的事情（确保在AndroidManifest中将此类添加为 receiver ）。如果您想发送额外信息以及警报，那么您可以使用 intent extras ，如下所示：

intent.putExtra("info1", value1);
intent.putExtra("info2", value2);

其中 info1 是额外数据的名称，value1是您发送的值。

希望这有帮助！

编辑：

ArrayList<Calendar> alarmTimes = new ArrayList<Calendar>();

Calendar calendar = Calendar.getInstance();
calendar.set(CALENDAR.MONTH, 7);
calendar.set(CALENDAR.DAY_OF_MONTH, 17);
calendar.set(CALENDAR.HOUR_OF_DAY, 13);
calendar.set(CALENDAR.MINUTE, 0);

alarmTimes.add(calendar);

//Repeat the above code for all alarm times and then return array object
return alarmTimes;

Answer 3

   Calendar cal = Calendar.getInstance(); //retrieves a calendar object w/ current time
        cal.add(cal.MINUTE, 1); //adds 1 minute to current time

    Intent alarmIntent = new Intent(this, CustomAlarmReceiver.class); 

    /* creates a new PendingIntent using the static variable eventID. 
     *  using eventID allows you to create multiple events with the same code
     *  without a unique id the intent would just be updated with new extras each time its created
     */
    PendingIntent pendingAlarm = PendingIntent.getBroadcast(this, eventID, alarmIntent, 
      PendingIntent.FLAG_UPDATE_CURRENT);
    eventID+=1; 

    /* get the Alarm service and set the alarm with the time to go off and what to do when the
     * alarm is received */
    AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
    am.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pendingAlarm);
    Intent intent1=new Intent(getApplicationContext(),ListActivity.class);
    startActivity(intent1);
    intent1.putExtra("date", date);
    intent1.putExtra("task", message);
              }

在特定日期和时间创建警报

3 个答案: