大家好,又见面了,我是全栈君。
日历控件大家应该不陌生,github 上面一搜一大堆,但是我们拿到 github 上面的一个日历控件,想动手改改功能改改需求,有时可能会觉得无从下手,(当然了,老司机就忽略我说的 —。—)那么,如果想知道一个日历控件是如何从无到有构建起来的,不妨各位看官快速浏览一下我的这篇文章。 文章主要是带大家一步一步熟悉构建的流程,并没有什么特别酷炫狂拽的效果。
先上一个效果图镇镇楼。
一、数据准备
1、实体类 MyCalendarBean
/**
* Created by deeson.woo
*/
public class MyCalendarBean {
private int year;
private int month;//1-12
private int day;//1-31
public MyCalendarBean(int year, int month, int day) {
this.year = year;
this.month = month;
this.day = day;
}
public int getYear() {
return year;
}
public int getMonth() {
return month;
}
public int getDay() {
return day;
}
}
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2、构建日期实体
/**
* 构建具体一天的对象
* @param year
* @param month
* @param day
* @return
*/
public MyCalendarBean generateCalendarBean(int year, int month, int day) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, day);
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH) + 1;
day = calendar.get(Calendar.DATE);
return new MyCalendarBean(year, month, day);
}
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3、打印当前月份的所有日期
/**
* 获取当前月份的日期列表
* @param year
* @param month
* @return
*/
public List<MyCalendarBean> getDaysListOfMonth(int year, int month) {
List<MyCalendarBean> list = new ArrayList<>();
int daysOfMonth = getDaysOfCertainMonth(year, month);
for (int i = 0; i < daysOfMonth; i++) {
MyCalendarBean bean = generateCalendarBean(year, month, i + 1);
list.add(bean);
}
return list;
}
/**
* 获取具体月份的最大天数
*
* @param year
* @param month
* @return
*/
public static int getDaysOfCertainMonth(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, 1);
return calendar.getActualMaximum(Calendar.DATE);
}
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//测试打印2018年2月份
printDaysList(getDaysListOfMonth(2018, 2));
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2018年2月 = { 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28 }
二、展示日期
1、将月份的所有日期按照7列展示
自定义ViewGroup(MonthCalendarView)
/**
* Created by deeson.woo
* 月份视图
*/
public class MonthCalendarView extends ViewGroup {
private int column = 7;
public MonthCalendarView(Context context) {
super(context);
}
public MonthCalendarView(Context context, AttributeSet attrs) {
super(context, attrs);
}
}
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(1)onMeasure()方法
- 拿到控件的宽度,分成七份,赋给 item 的宽度和高度
- 同时计算控件所需的高度
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int parentWidth = MeasureSpec.getSize(MeasureSpec.makeMeasureSpec(widthMeasureSpec, MeasureSpec.EXACTLY));
//将宽度平均分成七份,每个item的宽高都等于它
int itemWidth = parentWidth / column;
int itemHeight = itemWidth;
int parentHeight = 0;
for (int i = 0; i < getChildCount(); i++) {
View childView = getChildAt(i);
childView.measure(MeasureSpec.makeMeasureSpec(itemWidth, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(itemHeight, MeasureSpec.EXACTLY));
//计算控件所需的高度
if (i % column == 0) {
parentHeight += childView.getMeasuredHeight();
}
}
setMeasuredDimension(parentWidth, parentHeight);
}
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(2)onLayout()方法
- 按照七列布局的设计,计算出每个 item 的 left, top, right, bottom,精确地添加到控件里
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
for (int i = 0; i < getChildCount(); i++) {
View itemView = getChildAt(i);
int columnCount = i % column;
int rowCount = i / column;
int itemWidth = itemView.getMeasuredWidth();
int itemHeight = itemView.getMeasuredHeight();
left = columnCount * itemWidth;
top = rowCount * itemHeight;
right = left + itemWidth;
bottom = top + itemHeight;
itemView.layout(left, top, right, bottom);
}
}
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(3)填充月份日期数据
- 暴露一个公共方法用于填充数据
- 根据传进来的年、月,构建日期列表
- 逐一构建 itemView,填充到控件里
- 调用requestLayout()方法,重新绘制
public void setMonth(int year, int month) {
mList = calendarUtils.getDaysListOfMonth(year, month);
addAllItem();
requestLayout();
}
private void addAllItem() {
for (int i = 0; i < mList.size(); i++) {
MyCalendarBean bean = mList.get(i);
View itemView = generateDateView(bean);
addViewInLayout(itemView, i, itemView.getLayoutParams(), true);
}
}
private View generateDateView(MyCalendarBean bean) {
View itemView = LayoutInflater.from(getContext()).inflate(R.layout.item_date_view, null);
if (bean.isCurrentMonth()) {
TextView date = itemView.findViewById(R.id.date);
date.setText(String.valueOf(bean.getDay()));
}
return itemView;
}
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把 item_date_view.xml 布局也放出来
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:gravity="center"
android:textSize="14sp"
android:textColor="@color/text_black"
/>
</RelativeLayout>
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2、在布局中使用
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/background_white"
>
<com.example.deesonwoo.mysimplecalendar.calendar.MonthCalendarView
android:id="@+id/month_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorAccent">
</com.example.deesonwoo.mysimplecalendar.calendar.MonthCalendarView>
</LinearLayout>
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3、在 MainActivity 中的使用
package com.example.deesonwoo.mysimplecalendar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.example.deesonwoo.mysimplecalendar.calendar.MonthCalendarView;
import com.example.deesonwoo.mysimplecalendar.calendar.MyCalendarBean;
import com.example.deesonwoo.mysimplecalendar.calendar.MyCalendarUtils;
import java.util.List;
public class MainActivity extends AppCompatActivity {
MonthCalendarView monthView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
monthView = findViewById(R.id.month_view);
initCalendar();
}
private void initCalendar() {
//测试显示2018年3月
monthView.setMonth(2018, 3);
}
}
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效果展示如下:
4、添加顶部周布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="@color/background_white"
>
<LinearLayout
android:id="@+id/week_layout"
android:layout_width="match_parent"
android:layout_height="40dp"
android:orientation="horizontal"
android:background="@color/white"
>
<TextView
android:id="@+id/week_00"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="周日"
android:textColor="@color/text_black"
android:textSize="12sp" />
<TextView
android:id="@+id/week_01"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="周一"
android:textColor="@color/text_black"
android:textSize="12sp" />
<TextView
android:id="@+id/week_02"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="周二"
android:textColor="@color/text_black"
android:textSize="12sp" />
<TextView
android:id="@+id/week_03"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="周三"
android:textColor="@color/text_black"
android:textSize="12sp" />
<TextView
android:id="@+id/week_04"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="周四"
android:textColor="@color/text_black"
android:textSize="12sp" />
<TextView
android:id="@+id/week_05"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="周五"
android:textColor="@color/text_black"
android:textSize="12sp" />
<TextView
android:id="@+id/week_06"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:text="周六"
android:textColor="@color/text_black"
android:textSize="12sp" />
</LinearLayout>
<com.example.deesonwoo.mysimplecalendar.calendar.MonthCalendarView
android:id="@+id/month_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorAccent">
</com.example.deesonwoo.mysimplecalendar.calendar.MonthCalendarView>
</LinearLayout>
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效果如下:
5、优化日期与星期的对应关系
相信你们已经发现,上面展示的效果中,日期与星期并没有进行一一对应的排布。接下来,一起我们优化一下。
- 找到当前月份第一天对应的星期
- 修改工具类方法 getDaysListOfMonth(), 将前面空缺的上一个月的日期填充到月份列表中
- 将上个月的日期隐藏
(1)在 MyCalendarUtils 工具类中添加下面“获取具体一天对应的星期”的方法
/**
* 获取具体一天对应的星期
*
* @param year
* @param month
* @param day
* @return 1-7(周日-周六)
*/
private int getWeekDayOnCertainDate(int year, int month, int day) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, day);
return calendar.get(Calendar.DAY_OF_WEEK);
}
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(2)修改 getDaysListOfMonth()方法,将前面空缺的上一个月的日期填充到月份列表中
/**
* 获取当前月份的日期列表
*
* @param year
* @param month
* @return
*/
public List<MyCalendarBean> getDaysListOfMonth(int year, int month) {
List<MyCalendarBean> list = new ArrayList<>();
int daysOfMonth = getDaysOfCertainMonth(year, month);
//找到当前月第一天的星期,计算出前面空缺的上个月的日期个数,填充到当月日期列表中
int weekDayOfFirstDay = getWeekDayOnCertainDate(year, month, 1);
int preMonthDays = weekDayOfFirstDay - 1;
for (int i = preMonthDays; i > 0; i--) {
MyCalendarBean preMonthBean = generateCalendarBean(year, month, 1 - i);
list.add(preMonthBean);
}
for (int i = 0; i < daysOfMonth; i++) {
MyCalendarBean monthBean = generateCalendarBean(year, month, i + 1);
list.add(monthBean);
}
return list;
}
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展示效果如下:
显然,上一个月的日期在这里是需要区别展示或者需要隐藏的,不然会给用户造成视觉上的困扰,这里,我直接做隐藏操作。
(3)给日期实体类增加当前月标识,isCurrentMonth,并在构建数据的时候给标识赋值。
实体类如下:
/**
* Created by deeson.woo
*/
public class MyCalendarBean {
private int year;
private int month;//1-12
private int day;//1-31
private boolean isCurrentMonth = true;//是否为当前月份的日期
public MyCalendarBean(int year, int month, int day) {
this.year = year;
this.month = month;
this.day = day;
}
public int getYear() {
return year;
}
public int getMonth() {
return month;
}
public int getDay() {
return day;
}
public boolean isCurrentMonth() {
return isCurrentMonth;
}
public void setCurrentMonth(boolean currentMonth) {
isCurrentMonth = currentMonth;
}
}
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给标识赋值,在 getDaysListOfMonth()中赋值:
/**
* 获取当前月份的日期列表
*
* @param year
* @param month
* @return
*/
public List<MyCalendarBean> getDaysListOfMonth(int year, int month) {
List<MyCalendarBean> list = new ArrayList<>();
int daysOfMonth = getDaysOfCertainMonth(year, month);
//找到当前月第一天的星期,计算出前面空缺的上个月的日期个数,填充到当月日期列表中
int weekDayOfFirstDay = getWeekDayOnCertainDate(year, month, 1);
int preMonthDays = weekDayOfFirstDay - 1;
for (int i = preMonthDays; i > 0; i--) {
MyCalendarBean preMonthBean = generateCalendarBean(year, month, 1 - i);
preMonthBean.setCurrentMonth(false);
list.add(preMonthBean);
}
for (int i = 0; i < daysOfMonth; i++) {
MyCalendarBean monthBean = generateCalendarBean(year, month, i + 1);
monthBean.setCurrentMonth(true);
list.add(monthBean);
}
return list;
}
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最后修改我们自定义月历类中 generateDateView()方法,不显示上个月的日期:
private View generateDateView(MyCalendarBean bean) {
View itemView = LayoutInflater.from(getContext()).inflate(R.layout.item_date_view, null);
if(bean.isCurrentMonth()){
TextView date = itemView.findViewById(R.id.date);
date.setText(String.valueOf(bean.getDay()));
}
return itemView;
}
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效果如下:
三、持续优化改进
1、将静态日历改成动态可切换显示
(1)添加头部布局,用于显示当前月份以及翻页
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@color/background_blue"
>
<TextView
android:id="@+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:textSize="20sp"
android:textColor="@color/white"
/>
<ImageView
android:id="@+id/pre_month"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_alignParentLeft="true"
android:src="@mipmap/btn_preview"
/>
<ImageView
android:id="@+id/next_month"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:src="@mipmap/btn_next"
/>
</RelativeLayout>
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#####(2)修改自定义月历类
- 增加当前显示的年月成员变量
private int mYear, mMonth;
- 修改构造方法和填充数据的方法
public MonthCalendarView(Context context) {
super(context);
calendarUtils = new MyCalendarUtils(context);
}
public MonthCalendarView(Context context, AttributeSet attrs) {
super(context, attrs);
calendarUtils = new MyCalendarUtils(context);
}
public void setMonth(int year, int month) {
this.mYear = year;
this.mMonth = month;
invalidateMonth();
}
private void invalidateMonth() {
mList = calendarUtils.getDaysListOfMonth(mYear, mMonth);
removeAllViews();
addAllItem();
requestLayout();
}
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- 增加前翻页、后翻页方法
/**
* 展示上一个月
*/
public void moveToPreMonth() {
mMonth -= 1;
invalidateMonth();
}
/**
* 展示下一个月
*/
public void moveToNextMonth() {
mMonth += 1;
invalidateMonth();
}
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- 增加获取当前显示年月的方法
public String getCurrentYearAndMonth() {
return MyCalendarUtils.formatYearAndMonth(mYear, mMonth);
}
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(3)增加工具类方法
/**
* 格式化标题展示
* @param year
* @param month
* @return
*/
public static String formatYearAndMonth(int year, int month) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, month - 1, 1);
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH) + 1;
return year + "年" + month + "月";
}
/**
* 获取系统当前年月日
*
* @return
*/
public static int[] getNowDayFromSystem() {
Calendar cal = Calendar.getInstance();
cal.setTime(new Date());
return new int[]{cal.get(Calendar.YEAR), cal.get(Calendar.MONTH) + 1, cal.get(Calendar.DATE)};
}
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(4)修改 MainActivity 类
- 修改主题样式
- 增加头部布局相关
- 默认显示系统当前年月
package com.example.deesonwoo.mysimplecalendar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.deesonwoo.mysimplecalendar.calendar.MonthCalendarView;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
MonthCalendarView monthView;
ImageView btnPreMonth, btnNextMonth;
TextView title;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
monthView = findViewById(R.id.month_view);
initCalendar();
initTitleView();
updateTitle();
}
private void initCalendar() {
int[] nowDay = MyCalendarUtils.getNowDayFromSystem();
monthView.setMonth(nowDay[0], nowDay[1]);
}
private void initTitleView() {
title = findViewById(R.id.title);
btnPreMonth = findViewById(R.id.pre_month);
btnNextMonth = findViewById(R.id.next_month);
btnPreMonth.setOnClickListener(this);
btnNextMonth.setOnClickListener(this);
}
/**
* 刷新标题显示年月
*/
private void updateTitle() {
String yearAndMonth = monthView.getCurrentYearAndMonth();
title.setText(yearAndMonth);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.pre_month:
monthView.moveToPreMonth();
updateTitle();
break;
case R.id.next_month:
monthView.moveToNextMonth();
updateTitle();
break;
}
}
}
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最后显示的效果如下动图:
2、增加高亮显示系统当天日期
- 增加工具类方法
/**
* 判断是否为系统当天
* @param bean
* @return
*/
public static boolean isToday(MyCalendarBean bean) {
int[] nowDay = getNowDayFromSystem();
return bean.getYear() == nowDay[0] && bean.getMonth() == nowDay[1] && bean.getDay() == nowDay[2];
}
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- 修改自定义月历类构建日期的方法
private View generateDateView(MyCalendarBean bean) {
View itemView = LayoutInflater.from(getContext()).inflate(R.layout.item_date_view, null);
if (bean.isCurrentMonth()) {
TextView date = itemView.findViewById(R.id.date);
if (MyCalendarUtils.isToday(bean)) {
date.setBackgroundResource(R.drawable.item_today_bg);
}
date.setText(String.valueOf(bean.getDay()));
}
return itemView;
}
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- 系统当天高亮显示的背景 item_today_bg.xml
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="oval">
<solid
android:color="@color/theme_color" />
</shape>
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效果如下:
3、增加点击日期效果
(1)修改自定义月历类
- 修改构建日期方法
private View generateDateView(MyCalendarBean bean) {
View itemView = LayoutInflater.from(getContext()).inflate(R.layout.item_date_view, null);
if (bean.isCurrentMonth()) {
TextView date = itemView.findViewById(R.id.date);
if (MyCalendarUtils.isToday(bean)) {
date.setBackgroundResource(R.drawable.item_today_bg);
} else {
date.setBackgroundResource(R.drawable.item_pick_up);
}
date.setText(String.valueOf(bean.getDay()));
}
return itemView;
}
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- item_pick_up.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_selected="true">
<shape android:shape="oval">
<stroke android:color="@color/theme_color" android:width="1dp"/>
</shape>
</item>
<item android:drawable="@android:color/transparent" />
</selector>
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- 增加在主界面点击的回调接口方法
private OnDatePickUpListener onDatePickUpListener;
public void setOnDatePickUpListener(OnDatePickUpListener onDatePickUpListener) {
this.onDatePickUpListener = onDatePickUpListener;
}
public interface OnDatePickUpListener {
void onDatePickUp(MyCalendarBean bean);
}
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- 修改添加日期的方法,增加点击监听
private void addAllItem() {
for (int i = 0; i < mList.size(); i++) {
final MyCalendarBean bean = mList.get(i);
final View itemView = generateDateView(bean);
addViewInLayout(itemView, i, itemView.getLayoutParams(), true);
final int position = i;
itemView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (pickUpPosition == position) {
return;
}
if (pickUpPosition != -1) {
getChildAt(pickUpPosition).setSelected(false);
}
itemView.setSelected(true);
if (null != onDatePickUpListener) {
onDatePickUpListener.onOnDatePickUp(bean);
}
pickUpPosition = position;
}
});
}
}
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(2)在MainActivity中调用
private void initCalendar() {
int[] nowDay = MyCalendarUtils.getNowDayFromSystem();
monthView.setMonth(nowDay[0], nowDay[1]);
monthView.setOnDatePickUpListener(new MonthCalendarView.OnDatePickUpListener() {
@Override
public void onDatePickUp(MyCalendarBean bean) {
Toast.makeText(MainActivity.this, bean.toString(), Toast.LENGTH_SHORT).show();
}
});
}
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效果如下动图:
四、整合自定义控件
大家可能觉得我们的自定义控件到这里就完结了,但是young、simple、naive……(瞎bb) 秉着高内聚低耦合的原则(再次瞎bb),我将刚刚出现的操作全部整合到一个控件SimpleCalendarView 中。 直接上代码吧,也没几行,就不做什么解释了。
1、SimpleCalendarView 类
- 无非就是将标题视图、星期视图、月历视图逐一添加到自定义SimpleCalendarView 类中,再将相关接口补上,请看下面代码
package com.example.deesonwoo.mysimplecalendar.calendar;
import android.content.Context;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.example.deesonwoo.mysimplecalendar.R;
public class SimpleCalendarView extends LinearLayout implements View.OnClickListener, MonthCalendarView.OnDatePickUpListener {
private MonthCalendarView monthCalendarView;// 月历
private OnDatePickListener onDatePickListener;
private TextView title;
public SimpleCalendarView(Context context) {
this(context, null);
}
public SimpleCalendarView(Context context, AttributeSet attrs) {
super(context, attrs);
setOrientation(VERTICAL);
setBackgroundColor(context.getResources().getColor(R.color.white));
// 年月标题、翻页按钮
LayoutParams titleParams = new LayoutParams(LayoutParams.MATCH_PARENT, MyCalendarUtils.dp2px(context, 50));
RelativeLayout titleLayout = (RelativeLayout) LayoutInflater.from(context).inflate(R.layout.title_layout, null);
title = titleLayout.findViewById(R.id.title);
ImageView preMonth = titleLayout.findViewById(R.id.pre_month);
ImageView nextMonth = titleLayout.findViewById(R.id.next_month);
preMonth.setOnClickListener(this);
nextMonth.setOnClickListener(this);
addView(titleLayout, titleParams);
//星期布局
LayoutParams weekParams = new LayoutParams(LayoutParams.MATCH_PARENT, MyCalendarUtils.dp2px(context, 40));
LinearLayout weekLayout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.week_layout, null);
addView(weekLayout, weekParams);
//月历视图
LayoutParams monthParams = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
monthCalendarView = new MonthCalendarView(context);
initCalendarDate();
monthCalendarView.setOnDatePickUpListener(this);
addView(monthCalendarView, monthParams);
}
private void initCalendarDate() {
int[] nowDay = MyCalendarUtils.getNowDayFromSystem();
monthCalendarView.setMonth(nowDay[0], nowDay[1]);
updateTitle();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.pre_month:
if (null != monthCalendarView) {
monthCalendarView.moveToPreMonth();
}
updateTitle();
break;
case R.id.next_month:
if (null != monthCalendarView) {
monthCalendarView.moveToNextMonth();
}
updateTitle();
break;
}
}
private void updateTitle() {
if (null != title && null != monthCalendarView) {
title.setText(monthCalendarView.getCurrentYearAndMonth());
}
}
@Override
public void onDatePickUp(MyCalendarBean bean) {
if (null != onDatePickListener) {
onDatePickListener.onDatePick(bean);
}
}
public void setOnDatePickListener(OnDatePickListener onDatePickListener) {
this.onDatePickListener = onDatePickListener;
}
public interface OnDatePickListener {
void onDatePick(MyCalendarBean bean);
}
}
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2、在布局中使用,非常简单
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/background_white"
android:orientation="vertical">
<com.example.deesonwoo.mysimplecalendar.calendar.SimpleCalendarView
android:id="@+id/calendarView"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</com.example.deesonwoo.mysimplecalendar.calendar.SimpleCalendarView>
</LinearLayout>
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3、在MainActivity 中调用
package com.example.deesonwoo.mysimplecalendar;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Toast;
import com.example.deesonwoo.mysimplecalendar.calendar.MyCalendarBean;
import com.example.deesonwoo.mysimplecalendar.calendar.SimpleCalendarView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
SimpleCalendarView calendarView = findViewById(R.id.calendarView);
calendarView.setOnDatePickListener(new SimpleCalendarView.OnDatePickListener() {
@Override
public void onDatePick(MyCalendarBean bean) {
Toast.makeText(MainActivity.this, bean.toString(), Toast.LENGTH_SHORT).show();
}
});
}
}
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最后的效果就是文章开头的动态图。
五、后续
- 还有很多可以扩展修改的地方,这里就留给大家去做吧。
- 源码链接在这里
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