布局样式

<LinearLayout
                android:id="@+id/select_day_layout"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginTop="10dp"
                android:gravity="center_vertical"
                android:orientation="horizontal">

                <LinearLayout
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:layout_weight="1"
                    android:orientation="horizontal">

                    <TextView
                        android:id="@+id/start_day_tv"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:text="4月14日"
                        android:textColor="#242424"
                        android:textSize="18sp" />

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:text="入店"
                        android:textColor="#242424"
                        android:textSize="12sp" />

                </LinearLayout>


                <TextView
                    android:layout_width="21dp"
                    android:layout_height="1dp"
                    android:layout_marginLeft="@dimen/dp_12"
                    android:layout_marginRight="@dimen/dp_12"
                    android:background="#242424" />

                <LinearLayout
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:layout_weight="1"
                    android:gravity="center"
                    android:orientation="horizontal">

                    <TextView
                        android:id="@+id/end_day_tv"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:text="4月15日"
                        android:textColor="#242424"
                        android:textSize="18sp" />
                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center"
                        android:text="离店"
                        android:textColor="#242424"
                        android:textSize="12sp" />
                </LinearLayout>

                <TextView
                    android:id="@+id/total_day_tv"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center"
                    android:drawablePadding="@dimen/dp_4"
                    android:gravity="center"
                    android:text="共1晚"
                    android:drawableRight="@mipmap/hoteljump"
                    android:textColor="#242424"
                    android:textSize="13sp" />

            </LinearLayout>

Activity调用

 /**
     * 日历选择器
     */
    private int startGroup = -1;
    private int endGroup = -1;
    private int startChild = -1;
    private int endChild = -1;
    private DatePopupWindow datePopupWindow;//入住酒店的日历选择器

    private void showDatePopupWindow() {

        if (null == datePopupWindow) {
            datePopupWindow = new DatePopupWindow.Builder(mActivity, Calendar.getInstance().getTime(), mRootView)//初始化
                    .setInitSelect(startGroup, startChild, endGroup, endChild)//设置上一次选中的区间状态
                    .setInitDay(false)//默认为true，UI内容为共几天、开始、结束；当为false时,UI内容为共几晚、入住、离开
                    .setDateOnClickListener(new DatePopupWindow.DateOnClickListener() {//设置监听
                        //点击完成按钮后回调返回方法
                        @Override
                        public void getDate(String startDate, String endDate, int startGroupPosition, int
                                startChildPosition, int endGroupPosition, int endChildPosition) {
                            startGroup = startGroupPosition;//开始月份位置
                            startChild = startChildPosition;//开始对应月份中日的位置
                            endGroup = endGroupPosition;//结束月份位置
                            endChild = endChildPosition;//结束对应月份中日的位置
                            String mStartTime = DateUtils.FormatDateMD(startDate);
                            String mEndTime = DateUtils.FormatDateMD(endDate);

                            startDayTv.setText(mStartTime);
                            endDayTv.setText(mEndTime);
                            //需要格式化日期 转成接口需要的日期格式
                            checkInDate = DateUtils.formatDate(startDate);
                            checkOutDate = DateUtils.formatDate(endDate);
                            totalDay = Integer.parseInt(CalendarUtil.getTwoDay(endDate, startDate));
                            totalDayTv.setText(totalDay + "晚");

                            page = 1;
                            initMap();
                            mPresenter.getNewHotelList(true, map, lat, lng);
                        }
                    }).builder();

        } else {
            datePopupWindow.showAsDropDown(selectDayLayout);
        }
    }