DatePicker上半部分是空的

Question

我使用Android的本机DatePicker在以下方式，它工作正常，但视图不知何故变得不正确。

public class DatePickerFragment extends DialogFragment 
     implements DatePickerDialog.OnDateSetListener { 

    DatePickerDialog dialog; 

    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     // Use the current date as the default date in the picker 
     final Calendar c = Calendar.getInstance(); 
     int year = c.get(Calendar.YEAR); 
     int month = c.get(Calendar.MONTH); 
     int day = c.get(Calendar.DAY_OF_MONTH); 

     dialog= new DatePickerDialog(getActivity(), this, year, month, day); 
     dialog.getDatePicker().setMinDate(new Date().getTime()); 
     // Create a new instance of DatePickerDialog and return it 
     return dialog; 
    } 

    public void onDateSet(DatePicker view, int year, int month, int day) { 
     // Doing some stuff here 
    } 
} 

，并在调用它像这样：

DialogFragment datePickerFragment = new DatePickerFragment(); 
datePickerFragment.show(getActivity().getFragmentManager(), "startDate"); 

Answer 1

我从V21/styles.xml文件中删除此行解决我的问题。

<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> 
    <!--<item name="android:background">@android:color/white</item>--> 
</style> 

由于这条线所有自定义视图（片段，对话框等）是默认选择白色背景。