Question

我在Android中创建了一个包含日期，月份和年份的Spinner。我想将Spinner的数据显示为格式为String的{{1}}。但它总是包含错误：

dd/mm/yyyy

XML布局的一部分：

public static int compare(int lhs, int rhs) {
    return lhs < rhs ? -1 : (lhs == rhs ? 0 : 1);
}

private static NumberFormatException invalidInt(String s) {
    throw new NumberFormatException("Invalid int: \"" + s + "\"");
}

代码

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" >

    <Spinner
        android:id="@+id/datePayment"
        android:layout_width="75dp"
        android:layout_height="44dp"
        android:layout_marginRight="20dp"
        android:background="#FFFFFF" />

    <Spinner
        android:id="@+id/monthPayment"
        android:layout_width="100dp"
        android:layout_height="46dp"
        android:layout_marginRight="20dp"
        android:background="#FFFFFF" />

    <Spinner
        android:id="@+id/yearPayment"
        android:layout_width="60dp"
        android:layout_height="48dp"
        android:background="#FFFFFF" />

</LinearLayout>

<LinearLayout 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:layout_marginLeft="25dp"
    android:layout_marginRight="25dp"
    android:layout_marginTop="10dp">

    <Button
        android:id="@+id/bsubmit"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:gravity="center"
        android:background="#6b6b6b"
        android:text="Submit"
        android:textColor="#ffffff" />

    <Button
        android:id="@+id/breset"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:textColor="#ffffff"
        android:background="#6b6b6b"
        android:text="Reset"/> 

</LinearLayout>

Answer 1

下面的代码可以帮助您获得所需格式的日期。

final String[] month = {"Januari", "Februari", "Maret", "April", "Mei", "Juni", 
        "Juli", "Agustus", "September", "Oktober", "November", "Desember"};

final String[] date = {"01","02","03","04","05","06","07","08","09","10","11","12","13","14","15",
        "16","17","18","19","20","21","22","23","24","25","26","27","28","29","30","31"};

final String[] year = {"2014", "2015"};


    // This method identifies the month from the array
    // Use this function instead of numMonth function in your original code. 
    // Its easier to maintain.


public int getMonth(String passedMonth) {
    for (int i = 0; i < month.length; i++) {
        // Returns the array index of the passedMonth from month Array
        if (month[i].equals(passedMonth)) {
            return (i+1);
        }
    }
    return (-1);  // Invalid month
}


   // This method would get the input from your spinner and print the date as
   // per your desired format.

    public void printDateInMyFormat (String date, String month, String year)
   {
            // This is the format you are requesting for.
            SimpleDateFormat formatter = new SimpleDateFormat("dd/MM/yyyy");

            String dateInString = date +"/"+ getMonth(month) +"/"+ year;
    System.out.println("dateInString : "+dateInString);

    try {

        Date dt = formatter.parse(dateInString);
        System.out.println("My Date ::"+dt);
        System.out.println("My Required Date String :: " +formatter.format(dt));

    } catch (ParseException e) {
        e.printStackTrace();
    }

}

<强>结果：

Input:
test.printDateInMyFormat ("01", "September", "2015");

<强>输出：

Month is : 9
dateInString : 01/9/2015
My Date :: Tue Sep 01 00:00:00 IST 2015
My Required Date String :: 01/09/2015

代码处理无效日期，如下所示：

Input:
test.printDateInMyFormat ("31", "September", "2015");

<强>输出：

Month is : 9
dateInString : 31/9/2015
My Date :: Thu Oct 01 00:00:00 IST 2015
My Required Date String :: 01/10/2015

将Spinner转换为String中的日期格式

1 个答案: