我需要在每个星期五展示祝酒词

Question

I want to show a text message in a textview on every friday of the week, and hide it all other days, it displays the whole day on fridays, and hide on all other days. How can i implement this, I have not tried any code since i do not know where to start from. Any example code?

Answer 1

perhaps store the last time the message was displayed in the app's preferences, and then only display the message on Fridays if the previous display time was on a different day.

Calendar calendar = Calendar.getInstance();

if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.FRIDAY) {
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    Calendar noticeDisplayTime = Calendar.getInstance();
    noticeDisplayTime.setTimeInMillis(prefs.getLong("noticeDisplayTime", 0));

    if (!(calendar.get(Calendar.DAY_OF_YEAR) == noticeDisplayTime.get(Calendar.DAY_OF_YEAR) &&
        calendar.get(Calendar.YEAR) == noticeDisplayTime.get(Calendar.YEAR)) {
        prefs.edit().putLong("noticeDisplayTime", calendar.getTimeInMillis()).apply();
        // Display the notice
    }
}

Answer 2

Better use WorkManager to schedule a PeriodicWorkRequest which displays a Notification (in order to provide you with the proper search terms). I use this to test my WorkManager schedules, which do not display any notifications in release mode. The reason is, that Toast is always silent - while these I can hear, eg. even when streaming music, because the stream audio ducks away.