Android：如何更改DatePickerDialog标题栏的背景

Question

I managed to apply a custom theme to the DatePickerDialog but there's still a Blue part in the header of the DatePickerDialog

how can I change it ?

Please find the screenshot and my code below . .

This is the theme:

    <?xml version="1.0" encoding="utf-8"?>
    <resources>
        <style name="DiglrTheme" parent="android:Theme">        
            <item name="android:background">#3f863c</item>
        </style>
    </resources>

And this is where I applied it in the Activity :

 @Override
    protected Dialog onCreateDialog(int id) {

        switch (id) {
        case DATE_DIALOG_ID:            
            return  new DatePickerDialog(this, R.style.DiglrTheme ,mDateSetListener, mYear, mMonth, mDay);                
        }
        return null;
    }

Answer 1

尝试：

android:background = "@android:color/transparent"