android日期选择器在api 19中工作，而它在棒棒糖中工作

Question

我已经使用DatePickerDialog来显示在Lollipop手机中工作的对话框，但是在android api 19中没有工作。在Android谷歌地图中也存在问题。地图在棒棒糖中可见，但在kitkat中不显示黑屏。

这里是代码：

final DatePickerDialog.OnDateSetListener datePickerListener=new DatePickerDialog.OnDateSetListener() {
    @Override
    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
        date.setText(Integer.toString(dayOfMonth));
        month.setText(Integer.toString(monthOfYear));
        yearr.setText(Integer.toString(year));
        //SimpleDateFormat simpleDateFormat=new SimpleDateFormat("dd-MMM-yyyy");
        //chosenDate=simpleDateFormat.parse(Integer.toString(dayOfMonth)+"/"+Integer.toString(monthOfYear)+"/"+Integer.toString(year));
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.YEAR, year);
        cal.set(Calendar.MONTH,monthOfYear);
        cal.set(Calendar.DAY_OF_MONTH, dayOfMonth);
        chosenDate=cal.getTime();
        for(int i=0;i<7;i++) {
            Calendar c=Calendar.getInstance();
            c.set(year,monthOfYear,dayOfMonth,10+i*2,0,0);
            times[i]=new Date();
            times[i] = c.getTime();
        }
    }
};
final TextView time = (TextView) findViewById(R.id.et_time);
datepicker.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
Calendar cal = Calendar.getInstance();
        time.setText("");
        DatePickerDialog datePicker = new DatePickerDialog(BookingService.this, datePickerListener,
                cal.get(Calendar.YEAR),
                cal.get(Calendar.MONTH),
                cal.get(Calendar.DAY_OF_MONTH));
        datePicker.setCancelable(false);
        datePicker.getDatePicker().setMinDate(new Date().getTime());
        Dialog dialog=datePicker;
        dialog.show();
    }
});