使用日历获取前一天的名称而不是今天的名称

Question

美好的一天。我有一个 class，它应该在一个字符串中给我当前日期的名称，但不是给我当前日期的名称，而是给我前一天的名称。

我一直在调试器上检查发生了什么，显然开关在当天（目前是星期日）确实有效，并将正确的文本和图像放在我的 TextView 和 ImageView 上。但是一旦调试器完成，显示的图像和文本就是星期六的图像和文本。

这是我的 class:

private void checkWeekday() {

    String week_day;
    Locale loc = new Locale("es","MX");
    SimpleDateFormat day_format = new SimpleDateFormat("EEEE", loc);

    Calendar calendar = Calendar.getInstance();
    week_day = day_format.format(calendar.getTime());
    week_day = week_day.toLowerCase();

    switch (week_day) {
        case "domingo":
            textView_weekday_name.setText(sunday);
            imageView_diets_weekday.setImageDrawable(drawable_sunday);
        case "lunes":
            textView_weekday_name.setText(monday);
            imageView_diets_weekday.setImageDrawable(drawable_monday);
        case "marter":
            textView_weekday_name.setText(tuesday);
            imageView_diets_weekday.setImageDrawable(drawable_tuesday);
        case "miércoles":
            textView_weekday_name.setText(wednesday);
            imageView_diets_weekday.setImageDrawable(drawable_wednesday);
        case "jueves":
            textView_weekday_name.setText(thursday);
            imageView_diets_weekday.setImageDrawable(drawable_thursday);
        case "viernes":
            textView_weekday_name.setText(friday);
            imageView_diets_weekday.setImageDrawable(drawable_friday);
        case "sábado":
            textView_weekday_name.setText(saturday);
            imageView_diets_weekday.setImageDrawable(drawable_saturday);
    }

}

注意事项：此方法是在 Fragment 内的 @AfterViews 方法上调用的。

我已经尝试将日历位带到我的主要@AfterViews 方法中，但它仍然获取前一天的名称。

我怀疑我试图把日期名称放在错误的地方，但无论我把它放在哪里，它仍然会给我星期六。

作为参考，这是我的@AfterViews 方法的样子：

@AfterViews
protected void init() {

    checkWeekday();

    boolean logged = Prefs.getBoolean(user_logged, false);
    boolean subbed = Prefs.getBoolean(user_subscribed, false);
    String email = Prefs.getString(user_mail, "");

    mixpanel = MixpanelAPI.getInstance(getContext(), mixpanel_token);

    setHasOptionsMenu(true);

    if (logged && subbed) {

        List<UserMeals> meals = new RushSearch().find(UserMeals.class);

        if(meals.size() != 0) {

            setDataFromLocal();
            onClickHandler();

        } else {

            try {
                checkIfNewPlan(email, "fetch");
            } catch (JSONException e) {
                e.printStackTrace();
            }
            onClickHandler();
        }
    } else {
        emptyLayout("nosub");
    }

}

谢谢。

编辑

我在 switch 的每个案例中都缺少 break。太尴尬了！非常感谢！

Answer 1

要使用日历实例获取当前日期，请使用此方法：

public static String getCurrentDate(){
    final Calendar c = Calendar.getInstance();
    int year = c.get(Calendar.YEAR);
    int month = c.get(Calendar.MONTH);
    int day = c.get(Calendar.DAY_OF_MONTH);

    return (month+1) +"/"+ day + "/" + year;
}

由于日历月是从 0 开始的，这意味着一月实际上是 0 而不是 1，所以您需要给它加 1！

更新

我刚看了你的 switch 语句，它在 case 语句中没有 break 吗？

switch (week_day) {
    case "domingo":
        textView_weekday_name.setText(sunday);
        imageView_diets_weekday.setImageDrawable(drawable_sunday);
        break;
    case "lunes":
        textView_weekday_name.setText(monday);
        imageView_diets_weekday.setImageDrawable(drawable_monday);
        break;
    case "marter":
        textView_weekday_name.setText(tuesday);
        imageView_diets_weekday.setImageDrawable(drawable_tuesday);
        break;
    case "miércoles":
        textView_weekday_name.setText(wednesday);
        imageView_diets_weekday.setImageDrawable(drawable_wednesday);
        break;
    case "jueves":
        textView_weekday_name.setText(thursday);
        imageView_diets_weekday.setImageDrawable(drawable_thursday);
        break;
    case "viernes":
        textView_weekday_name.setText(friday);
        imageView_diets_weekday.setImageDrawable(drawable_friday);
        break;
    case "sábado":
        textView_weekday_name.setText(saturday);
        imageView_diets_weekday.setImageDrawable(drawable_saturday);
        break;
}

我感觉这就是问题所在！

使用日历获取前一天的名称而不是今天的名称

Getting the name of the day before instead of today's with Calendar

android

android-calendar