如何在 android 的特定时间安排服务

Question

我正在制作演示 android 项目，我想在其中安排每天 8:00 时钟的服务。我从我的启动器 activity 调用这个方法。每当我启动应用程序时，都会调用下面的方法，同时它会启动服务并显示通知。我只希望它应该以这样的方式安排它应该在 8:00 而不是每次我打开应用程序时执行。

public static void scheduleVerseNotificationService(Context mContext) {
    AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(mContext, Notification.class);
    PendingIntent pendingIntent = PendingIntent.getService(mContext, 0, intent, 0);

    // Set the alarm to start at approximately 08:00 morning.
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, 8);
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);

    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);

}

谢谢

Answer 1

我在理解你的问题时遇到了一些问题，所以：

 I only want it should schedule in such a way it should execute at 8:00 instead of everytime I open app.

我理解为 "I only want to execute an Activity at 8:00, and not when I start that Activity" 所以，一个建议是：

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Intent YOUR_INTENT = getIntent();
if (YOUR_INTENT!= null) {
 if(YOUR_INTENT.getStringExtra("YOUR_PACKAGE.A_VAR_NAME") != null){
  if (YOUR_INTENT.getStringExtra("YOUR_PACKAGE.A_VAR_NAME").equals("A VALUE")) {
   DO_THE_CODE_YOU_WANT();
  }
}

然后，根据您的意图，添加一个值：intent.putExtra("YOUR_PACKAGE.A_VAR_NAME", "A VALUE");

Answer 2

您似乎为已经过去的时间安排了计时器，所以它会在您请求时立即调用 alarmManager.setInexactRepeating

这是解决您的问题的代码：

public static void scheduleVerseNotificationService(Context mContext) {
    AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
    Intent intent = new Intent(mContext, Notification.class);
    PendingIntent pendingIntent = PendingIntent.getService(mContext, 0, intent, 0);

    // reset previous pending intent
    alarmManager.cancel(pendingIntent);

    // Set the alarm to start at approximately 08:00 morning.
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, 8);
    calendar.set(Calendar.MINUTE, 0);
    calendar.set(Calendar.SECOND, 0);

    // if the scheduler date is passed, move scheduler time to tomorrow
    if (System.currentTimeMillis() > calendar.getTimeInMillis()) {
        calendar.add(Calendar.DAY_OF_YEAR, 1);
    }

    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, pendingIntent);
}

Answer 3

尝试将此行用于 pendingIntent

pendingIntent= PendingIntent.getBroadcast(mContext, 0, intent, 0);

如何在 android 的特定时间安排服务

How to schedule at particular time service in android

android

android-service

alarmmanager

android-pendingintent