Android 在DatePickerDialog中以数字格式而不是字母格式显示月份字段

下面的图片显示了我在android应用程序中的当前日期选择器，但是我想将所有月份显示为01、02、03…12，而不是1月、2月、3月。。。十二月

任何帮助都将不胜感激

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您可以使用数字选择器来实现这一点：

1）创建字符串数组：

String mValues[] = { "01","02","03","04","05","06","07","08","09","10","11","12"};

private void setNubmerPicker(NumberPicker nubmerPicker,String [] numbers ){
nubmerPicker.setMaxValue(numbers.length-1);
nubmerPicker.setMinValue(0);
nubmerPicker.setWrapSelectorWheel(true);
nubmerPicker.setDisplayedValues(numbers);
}

2）创建使用自定义值创建数字选择器的方法：

String mValues[] = { "01","02","03","04","05","06","07","08","09","10","11","12"};

private void setNubmerPicker(NumberPicker nubmerPicker,String [] numbers ){
nubmerPicker.setMaxValue(numbers.length-1);
nubmerPicker.setMinValue(0);
nubmerPicker.setWrapSelectorWheel(true);
nubmerPicker.setDisplayedValues(numbers);
}

3）使用自定义值调用数字选择器方法：

String mValues[] = { "01","02","03","04","05","06","07","08","09","10","11","12"};

private void setNubmerPicker(NumberPicker nubmerPicker,String [] numbers ){
nubmerPicker.setMaxValue(numbers.length-1);
nubmerPicker.setMinValue(0);
nubmerPicker.setWrapSelectorWheel(true);
nubmerPicker.setDisplayedValues(numbers);
}

setnumberpicker（yourNumberPicker，mValues）

数字选择器的优点：


添加到API级别11中，因此您可以在所有设备上使用它
你不需要打开一个对话框，它会让你的应用程序更简单（想象一下，你想下订单，以及打开对话框的每一个小细节），当然，如果你愿意，你每次都可以把你的号码选择器放在对话框中
如果你使用我的答案，你可以在你的数据数组中使用Unicode字符（在我的例子中是-mValues），我认为这真的是一个很好的加法，几乎不费吹灰之力
您可以使用
NumberPicker
设计自己的
对话框
，但如果您仍然想使用
DatePickerDialog
，这应该可以：

DatePickerDialog mDatePicker = new DatePickerDialog(MainActivity.this, android.R.style.Theme_Holo_Light_Dialog, new DatePickerDialog.OnDateSetListener() {
    public void onDateSet(DatePicker view, int selectedyear, int selectedmonth, int selectedday) {
        // Stuff
    }
}, mYear, mMonth, mDayOfMonth) {

    final int month = getContext().getResources().getIdentifier("android:id/month", null, null);
    final String[] monthNumbers = new String[]{ "01","02","03","04","05","06","07","08","09","10","11","12"}

    @Override
    public void onDateChanged(@NonNull DatePicker view, int y, int m, int d) {
        super.onDateChanged(view, y, m, d);
        // Since DatePickerCalendarDelegate updates the month spinner too, we need to change months as numbers here also
        if(month != 0){
            NumberPicker monthPicker = findViewById(month);
            if(monthPicker != null){
                monthPicker.setDisplayedValues(monthNumbers);
            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        // Hide day spinner
        int day = getContext().getResources().getIdentifier("android:id/day", null, null);
        if(day != 0){
            NumberPicker dayPicker = findViewById(day);
            if(dayPicker != null){
                dayPicker.setVisibility(View.GONE);
            }
        }
        // Show months as Numbers
        if(month != 0){
            NumberPicker monthPicker = findViewById(month);
            if(monthPicker != null){
                monthPicker.setDisplayedValues(monthNumbers);
            }
        }
    }
};
mDatePicker.setTitle("Select Date");
mDatePicker.show();

我使用了@Dispew answer，但我将monthPicker设置为null，因此我更改了此选项：

final int month = getContext().getResources().getIdentifier("android:id/month", null, null);

// Show months as Numbers
        if(month != 0){
            NumberPicker monthPicker = findViewById(month);
            if(monthPicker != null){
                monthPicker.setDisplayedValues(monthNumbers);
            }
        }

为此：

NumberPicker monthPicker = mDatePicker.findViewById((Resources.getSystem().getIdentifier("month", "id", "android")));
    if (monthPicker != null){
        monthPicker.setDisplayedValues(monthNumbers);
    }

尝试使用以下方法：