简单日期格式的星期几显示同一天 [英] Simple date format day of week displays same day

问题描述

我在以下代码中遇到问题，而不考虑日期，星期四显示为dayOfTheWeek.有什么想法让我错了吗?

I'm having issues with the below code displays Thursday as the dayOfTheWeek regardless of the date. Any ideas where I've gone wrong with this?

public void CreatePlan() {
    editPlanName = findViewById(R.id.editPlanName);
    String plan_name = editPlanName.getText().toString();
    DatabaseManager db;
    int day = datepicker.getDayOfMonth();
    int month = datepicker.getMonth();
    int year = datepicker.getYear();
    SimpleDateFormat sdf = new SimpleDateFormat("EEEE");
    Integer d_name = day;
    Integer plan_recipe = 0;
    Log.d("Date", String.valueOf(d_name));
    String dayOfTheWeek = sdf.format(d_name);
    String date = day + "/" + month + "/" +year;
    db = new DatabaseManager(getApplicationContext());
    Log.d("Recipe name", recipe_name);
    db.createPlanRecipe(d_name, date, dayOfTheWeek, recipe_name);
    db.createPlan(plan_name, plan_recipe);
}

推荐答案

您必须从您的 datepicker 创建 Date ，然后将其格式化以查找如下日期:

You have to create Date from your datepicker, then format it to find day like below:

  int day = datePicker.getDayOfMonth();
  int month = datePicker.getMonth();
  int year =  datePicker.getYear();

  Calendar calendar = Calendar.getInstance();
  calendar.set(year, month - 1, day);

  SimpleDateFormat sdf = new SimpleDateFormat("EEEE");
  dayOfTheWeek = sdf.format(calendar.getTime());

这篇关于简单日期格式的星期几显示同一天的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！