Question

我有两个编辑文本框，我想验证结束日期，该日期小于开始日期。

我已经完成了简单的验证，因此我应该如何验证，例如，我的开始日期是“ 2019-05-08”，我的结束日期是“ 2019-04-05”，如果结束日期短于错误消息“结束日期小于开始日期”。

这是我的代码：

  ExpStDt = (EditText) findViewById(R.id.ExpStDt);
    textInputExpStDt = (TextInputLayout)findViewById(R.id.textInputExpStDt);
    ExpEndDt = (EditText) findViewById(R.id.ExpEndDt);
    textInputExpEndDt = (TextInputLayout)findViewById(R.id.textInputExpEndDt);


 if (validate()){
                // Get values from edit text fields.
 String Exp_St_Dt = ExpStDt.getText().toString();
               String Exp_End_Dt = ExpEndDt.getText().toString();

// Data inserted in the database
      .......
// This method is used to validate input given by user
  String Exp_St_Dt = ExpStDt.getText().toString();
            String Exp_End_Dt = ExpEndDt.getText().toString();
 // Handling validation for User Name field.
  if (Exp_St_Dt.isEmpty()) {
                valid = false;
                textInputExpStDt.setError("Please Enter The Expected Date Where you want to start Your leave");
                textInputExpStDt.requestFocus();
            } else {

                valid = true;
                textInputExpStDt.setError(null);
            }
            if (Exp_End_Dt.isEmpty()) {
                valid = false;
                textInputExpEndDt.setError("Please Enter the Expected Date Where you want to End Your leave");
                textInputExpEndDt.requestFocus();
            } else {
                valid = true;
                textInputExpEndDt.setError(null);
            }
 // Check validation for end date that is greater than start date
            SimpleDateFormat dfDate  = new SimpleDateFormat("yyyy-MM-dd");

                boolean b = false;
            try {
                if(dfDate.parse(Exp_St_Dt).before(dfDate.parse(Exp_End_Dt)))
                {
                    b = true;//If start date is before end date
                }
                else if(dfDate.parse(Exp_St_Dt).equals(dfDate.parse(Exp_End_Dt)))
                {
                    b = true;//If two dates are equal
                }
                else if (dfDate.parse(Exp_End_Dt).before(dfDate.parse(Exp_St_Dt)))
                {
                    b = false; //If start date is after the end date

                }
            } catch (Exception e) {
                e.printStackTrace();
            }
            return valid;
        }

请帮助我，谢谢：）

Answer 1

您可以执行以下操作比较两个日期：

SimpleDateFormat dfDate  = new SimpleDateFormat("yyyy-MM-dd");
public static boolean CheckDates("2012-07-12", "2012-06-12)"    {
    boolean b = false;
    try {
        if(dfDate.parse(d1).before(dfDate.parse(d2)))
        {
            b = true;//If start date is before end date
        }
        else if(dfDate.parse(d1).equals(dfDate.parse(d2)))
        {
            b = true;//If two dates are equal
        }
        else
        {
            b = false; //If start date is after the end date
        }
    } catch (ParseException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return b;
}

Answer 2

只需将两个日期转换为Date类型，然后使用Date＃getTime（）方法进行比较

如何验证小于Android中开始日期的结束日期？

2 个答案: