#自定义日历控件的使用
一．DatePicker日期选择类的使用
DatePicker常用xml属性：
自定义布局文件xml展示： item_data_picker
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:layout_width="match_parent"android:layout_height="wrap_content"android:background="@mipmap/dialog_bg"android:orientation="vertical"android:padding="@dimen/dp_20"><TextViewandroid:layout_width="220dp"android:layout_height="45dp"android:layout_gravity="center_horizontal"android:background="@mipmap/icon_dialog_title_bg"android:gravity="center"android:padding="10dp"android:text="选择日期"android:textColor="@color/white"android:textSize="@dimen/sp_18"android:textStyle="bold" /><DatePickerandroid:id="@+id/date_picker"android:layout_width="match_parent"android:layout_height="200dp"android:background="@null"android:calendarTextColor="@color/white"android:calendarViewShown="false"android:datePickerMode="spinner"android:theme="@style/MyDatePicker"android:yearListSelectorColor="@color/white" /><androidx.appcompat.widget.LinearLayoutCompatandroid:layout_width="match_parent"android:layout_height="wrap_content"android:layout_marginTop="@dimen/dp_20"android:orientation="horizontal"><TextViewandroid:id="@+id/tv_data_cancel"android:layout_width="60dp"android:layout_height="35dp"android:layout_marginEnd="@dimen/dp_10"android:layout_weight="1"android:background="@mipmap/icon_dialog_bt_bg"android:gravity="center"android:text="取消"android:textColor="@color/white"android:textSize="@dimen/sp_16" /><TextViewandroid:id="@+id/tv_data_sure"android:layout_width="60dp"android:layout_height="35dp"android:layout_marginStart="@dimen/dp_10"android:layout_weight="1"android:background="@mipmap/icon_dialog_bt_bg"android:gravity="center"android:text="确定"android:textColor="@color/white"android:textSize="@dimen/sp_16" /></androidx.appcompat.widget.LinearLayoutCompat></LinearLayout>
这里关键代码是设置DataPicker主题颜色为白色：
在style中自定义：
<style name="MyDatePicker" parent="Theme.AppCompat.Light.NoActionBar"><item name="android:textColorPrimary">@color/white</item></style>
然后通过：
android:theme="@style/MyDatePicker"
引入
对应图片：
接下来是通过AlertDialog对其进行加载：
AlertDialog.Builder builder = new AlertDialog.Builder(context);final View view = LayoutInflater.from(context).inflate(R.layout.item_data_picker, null);final DatePicker datePicker = view.findViewById(R.id.date_picker);final TextView textView = view.findViewById(R.id.tv_data_sure);final TextView mTvCancel = view.findViewById(R.id.tv_data_cancel);datePicker.setMaxDate(new Date().getTime());//设置日期的上限日期datePicker.setMinDate(lastMonth.getTime());//设置日期的下限日期builder.setView(view);AlertDialog alertDialog = builder.create();alertDialog.show();mTvCancel.setOnClickListener(v -> alertDialog.cancel());textView.setOnClickListener(v -> {//数据回调：显示在自己想要的位置mTvTime.setText(datePicker.getYear() + "-" + (datePicker.getMonth() + 1) + "-" + datePicker.getDayOfMonth());alertDialog.cancel();});//设置日历间隔线的颜色DataPickerDivderUtils.setDataPickerDivderColor(datePicker, context.getResources().getColor(R.color.color00FFFF));//设置dialog的背景色为透明 ，dialog有个初始背景，view是叠加在上面的，如果不这样加载，则无法正常显示Objects.requireNonNull(alertDialog.getWindow()).setBackgroundDrawableResource(android.R.color.transparent);
上述代码主要是加载自定义的view，到这儿差不多就已经实现了自己想要的背景样式
下面是设置dataPicker 间隔线颜色辅助类
DataPickerDivderUtils
package com.tofly.gygps.uitils;import android.content.res.Resources;import android.graphics.drawable.ColorDrawable;import android.widget.DatePicker;import android.widget.LinearLayout;import android.widget.NumberPicker;import java.lang.reflect.Field;//设置dataPicker 间隔线颜色辅助类public class DataPickerDivderUtils {public static void setDataPickerDivderColor(DatePicker datePicker,int color){// Divider changing:// 获取 mSpinnersLinearLayout llFirst = (LinearLayout) datePicker.getChildAt(0);// 获取 NumberPickerLinearLayout mSpinners = (LinearLayout) llFirst.getChildAt(0);for (int i = 0; i < mSpinners.getChildCount(); i++) {NumberPicker picker = (NumberPicker) mSpinners.getChildAt(i);Field[] pickerFields = NumberPicker.class.getDeclaredFields();for (Field pf : pickerFields) {if (pf.getName().equals("mSelectionDivider")) {pf.setAccessible(true);try {pf.set(picker, new ColorDrawable(color));//设置分割线颜色} catch (IllegalArgumentException | Resources.NotFoundException | IllegalAccessException e) {e.printStackTrace();}break;}}}}}
日历弹窗工具类完整代码如下：
package com.tofly.gygps.uitils;import android.annotation.SuppressLint;import android.app.AlertDialog;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.widget.DatePicker;import android.widget.TextView;import com.tofly.gygps.R;import java.util.Calendar;import java.util.Date;import java.util.Objects;/*** @ClassName:DataPickerUtils* @Description: 日历弹窗工具类* @Author: Rivan* @CreateDate:/9/14 0:20* @UpdateDate:/9/14 0:20*/public class DataPickerUtils {@SuppressLint("SetTextI18n")public static void createDataPicker(Context context, TextView mTvTime){Calendar ca = Calendar.getInstance();//得到一个Calendar的实例ca.setTime(new Date());// 设置最小时间为当前年份-1ca.add(Calendar.YEAR, -1);// 年份减1Date lastMonth = ca.getTime(); //结果AlertDialog.Builder builder = new AlertDialog.Builder(context);final View view = LayoutInflater.from(context).inflate(R.layout.item_data_picker, null);final DatePicker datePicker = view.findViewById(R.id.date_picker);final TextView textView = view.findViewById(R.id.tv_data_sure);final TextView mTvCancel = view.findViewById(R.id.tv_data_cancel);datePicker.setMaxDate(new Date().getTime());//设置日期的上限日期为当前日期datePicker.setMinDate(lastMonth.getTime());//设置日期的下限日期builder.setView(view);AlertDialog alertDialog = builder.create();alertDialog.show();mTvCancel.setOnClickListener(v -> alertDialog.cancel());textView.setOnClickListener(v -> {mTvTime.setText(datePicker.getYear() + "-" + (datePicker.getMonth() + 1) + "-" + datePicker.getDayOfMonth());alertDialog.cancel();});DataPickerDivderUtils.setDataPickerDivderColor(datePicker, context.getResources().getColor(R.color.color00FFFF));Objects.requireNonNull(alertDialog.getWindow()).setBackgroundDrawableResource(android.R.color.transparent);}}
最终实现效果：
