Hide day from datepicker

Question

I need hide the day field from a datepicker, I found this method, but the problems is in the version of Android 2.3.3, works fine, but in the version 4x of android not hides the day field. I guess is the library "java.lang.reflect.Field" is obsolete , but I'm not sure of this.

I found this solution here

may be going on here?

final DatePicker datePicker = new DatePicker(this);                                     
                LLayout.addView(datePicker);

                hideDayField(datePicker, "mDayPicker");


    private void hideDayField(DatePicker datePicker, String name) {
    try {
        java.lang.reflect.Field field = DatePicker.class.getDeclaredField(name);
        field.setAccessible(true);
        View fieldInstance = (View) field.get(datePicker);
        fieldInstance.setVisibility(View.GONE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Answer 1

That approach you're taking uses reflection to mess with some hidden fields of the DatePicker-class. The problem with this is, that when the internals of a class change (e.g. the name of the field you're getting changed) this won't work anymore.

See the Docs on Reflection.

In your linked question, there are some other options provided, which might be better suited.

Answer 2

I have done something similar hiding the day and the month, found the solution here

try {
    java.lang.reflect.Field[] f = picker.getClass().getDeclaredFields();
    for (java.lang.reflect.Field field : f) {
        if (field.getName().equals("mDayPicker") || field.getName().equals("mDaySpinner")
           || field.getName().equals("mMonthPicker") || field.getName().equals("mMonthSpinner")) {
           field.setAccessible(true);
           Object dmPicker = new Object();
           dmPicker = field.get(picker);
           ((View) dmPicker).setVisibility(View.GONE);
        }
    }
}

Hope it helps.