在开发中可能会遇到某些情况下需要用到日历的功能,并且还要在日历上加标签什么的,最重要的就是android自带的日历由于各个系统版本不同导致日历的样式也不同,这样就会导致使用起来比较麻烦..而且在日历中加标签也不好实现...所以很多时候日历都是自己去实现的...由于自定义日历会比较麻烦...这里就教大家使用GridView来实现,主要是我们比较熟悉这个控件...到时候也可以根据自己的情况进行封装为自定义View

下面就先看看效果图.由于是从项目中抽取出来的,某些地方定制性比较强, 可以根据需求自行修改

效果图

图中的红点就是标签,蓝色背景就是选中的意思.

下面开始撸代码:

先上核心的GridView的适配器:

CalendarAdapter.java

/**

* 日历gridview中的每一个item显示的textview

*/

public class CalendarAdapter extends BaseAdapter {

private static String TAG = "CalendarAdapter";

private boolean isLeapyear = false; //是否为闰年

private int daysOfMonth = 0; //某月的天数

private int dayOfWeek = 0; //具体某一天是星期几

private int lastDaysOfMonth = 0; //上一个月的总天数

private Context context;

private String[] dayNumber = new String[42]; //一个gridview中的日期存入此数组中

private SpecialCalendar sc = null;

private int currentYear = 0;

private int currentMonth = 0;

/**

* 当前选中的日期位置

*/

private int currentFlag = -1;

/**

* 当前选中天的字符串 例:20170830

*/

private String currentDayStr;

private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-M-d");

private Set schDateTagFlag = new ArraySet<>(); //存储当月所有的日程日期(标签)

private String showYear = ""; //用于在头部显示的年份

private String showMonth = ""; //用于在头部显示的月份

private String animalsYear = "";

private String leapMonth = ""; //闰哪一个月

private Set mSet = null;

/**

* 距离当前月的差(上一个月-1,当前月0,下一个月+1)

*/

private int jumpMonth = 0;

public CalendarAdapter(Context context, int year, int month, String currentDayStr) {

this.context = context;

sc = new SpecialCalendar();

currentYear = year;

currentMonth = month; //得到跳转到的月份

this.currentDayStr = currentDayStr;

getCalendar(currentYear, currentMonth);

}

@Override

public int getCount() {

return dayNumber.length;

}

@Override

public Object getItem(int position) {

return position;

}

@Override

public long getItemId(int position) {

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder myViewHolder = null;

if (convertView == null || convertView.getTag() == null) {

convertView = LayoutInflater.from(context).inflate(R.layout.item_select_time, null);

myViewHolder = new ViewHolder(convertView);

convertView.setTag(myViewHolder);

} else {

myViewHolder = (ViewHolder) convertView.getTag();

}

myViewHolder.mIdTvItemSelectTimeDay.setText(dayNumber[position]);

myViewHolder.mIdTvItemSelectTimeDay.setTextColor(Color.GRAY);//不是当前月为灰

if (position < daysOfMonth + dayOfWeek && position >= dayOfWeek) {

// 当前月信息显示

myViewHolder.mIdTvItemSelectTimeDay.setTextColor(Color.BLACK);// 当月字体设黑

myViewHolder.mIdTvItemSelectTimeDay.setTag(true);// 当月字体设黑

}else {

myViewHolder.mIdTvItemSelectTimeDay.setTag(false);// 当月字体设黑

}

if (currentFlag != -1 && currentFlag == position) {

//设置当天的背景

myViewHolder.mIdTvItemSelectTimeDay.setBackgroundResource(R.color.mainMenu);

myViewHolder.mIdTvItemSelectTimeDay.setTextColor(Color.WHITE);

} else {

myViewHolder.mIdTvItemSelectTimeDay.setBackgroundColor(0);

}

//显示小圆点

if (schDateTagFlag != null && schDateTagFlag.size() > 0) {

if (schDateTagFlag.contains(position)) {

if (myViewHolder.mIdImgItemSelectTimeLogo.getVisibility()!=View.VISIBLE) {

myViewHolder.mIdImgItemSelectTimeLogo.setVisibility(View.VISIBLE);

}

} else {

if (myViewHolder.mIdImgItemSelectTimeLogo.getVisibility()!=View.GONE) {

myViewHolder.mIdImgItemSelectTimeLogo.setVisibility(View.GONE);

}

}

} else {

if (myViewHolder.mIdImgItemSelectTimeLogo.getVisibility()!=View.GONE) {

myViewHolder.mIdImgItemSelectTimeLogo.setVisibility(View.GONE);

}

}

return convertView;

}

/**

* 下一个月

*/

public void addMonth() {

jumpMonth++;

}

/**

* 上一个月

*/

public void lessMonth() {

jumpMonth--;

}

/**

* 更新日历数据

*/

public void upDataMonth() {

int stepYear;

int stepMonth = currentMonth + jumpMonth;

if (stepMonth > 0) {

//下一个月

if (stepMonth % 12 == 0) {

stepYear = currentYear + stepMonth / 12 - 1;

stepMonth = 12;

} else {

stepYear = currentYear + stepMonth / 12;

stepMonth = stepMonth % 12;

}

} else {

//上一个月

stepYear = currentYear - 1 + stepMonth / 12;

stepMonth = stepMonth % 12 + 12;

}

getCalendar(stepYear, stepMonth);

}

/**

* 得到某年的某月的天数且这月的第一天是星期几

*

* @param year

* @param month

*/

private void getCalendar(int year, int month) {

isLeapyear = sc.isLeapYear(year); //是否为闰年

daysOfMonth = sc.getDaysOfMonth(isLeapyear, month); //某月的总天数

dayOfWeek = sc.getWeekdayOfMonth(year, month); //某月第一天为星期几

lastDaysOfMonth = sc.getDaysOfMonth(isLeapyear, month - 1); //上一个月的总天数

getWeek(year, month);

}

/**

* 将一个月中的每一天的值添加入数组dayNuber中

*

* @param year

* @param month

*/

private void getWeek(int year, int month) {

schDateTagFlag.clear();

currentFlag = -1;

int j = 1;

//得到当前月的所有日程日期(这些日期需要标记)

for (int i = 0; i < dayNumber.length; i++) {

if (i < dayOfWeek) { //前一个月

int temp = lastDaysOfMonth - dayOfWeek + 1;

dayNumber[i] = (temp + i) + "";

} else if (i < daysOfMonth + dayOfWeek) {//本月

int day = i - dayOfWeek + 1; //得到的日期

dayNumber[i] = i - dayOfWeek + 1 + "";

//对于当前月才去标记当前日期

String yearStr = String.valueOf(year);

String monthStr =getStr(String.valueOf(month),2);

String dayStr =getStr(String.valueOf(day),2);

String timeAll = yearStr + monthStr + dayStr;

if (timeAll.equals(currentDayStr)) {//判断选中的位置

currentFlag = i;

}

if (mSet != null && mSet.size() > 0) {

for (String s : mSet) {//迭代器遍历判断是否需要带标签

if (timeAll.equals(s)) {

schDateTagFlag.add(i);

}

}

}

setShowYear(yearStr);

setShowMonth(String.valueOf(month));

} else { //下一个月

dayNumber[i] = j + "";

j++;

}

}

}

/**

* 获取当前时间 样式:20170830

* @param position

* @return

*/

public String getItemTime(int position) {

String month = getStr(getShowMonth(), 2);

String day = getStr(getDateByClickItem(position), 2);

return getShowYear() + month + day;

}

/**

* 保留N位整数,不足前面补0

*

* @param file String

* @param bit 位数

* @return

*/

public static String getStr(String file,int bit) {

while (file.length() < bit)

file = "0" + file;

return file;

}

/**

* 点击每一个item时返回item中的日期

*

* @param position

* @return

*/

public String getDateByClickItem(int position) {

return dayNumber[position];

}

/**

* 在点击gridView时，得到这个月中第一天的位置

*

* @return

*/

public int getStartPositon() {

return dayOfWeek + 7;

}

/**

* 在点击gridView时，得到这个月中最后一天的位置

*

* @return

*/

public int getEndPosition() {

return (dayOfWeek + daysOfMonth + 7) - 1;

}

public String getShowYear() {

return showYear;

}

public void setShowYear(String showYear) {

this.showYear = showYear;

}

public String getShowMonth() {

return showMonth;

}

public void setShowMonth(String showMonth) {

this.showMonth = showMonth;

}

public String getAnimalsYear() {

return animalsYear;

}

public void setAnimalsYear(String animalsYear) {

this.animalsYear = animalsYear;

}

public String getLeapMonth() {

return leapMonth;

}

public void setLeapMonth(String leapMonth) {

this.leapMonth = leapMonth;

}

public Set getSet() {

return mSet;

}

public void setSet(Set set) {

mSet = set;

}

static class ViewHolder {

@BindView(R.id.id_img_item_select_time_logo)

ImageView mIdImgItemSelectTimeLogo;

@BindView(R.id.id_tv_item_select_time_day)

TextView mIdTvItemSelectTimeDay;

ViewHolder(View view) {

ButterKnife.bind(this, view);

}

}

}

日历工具类:

/**

* 日历工具类

*/

public class SpecialCalendar {

private int daysOfMonth = 0; //某月的天数

private int dayOfWeek = 0; //具体某一天是星期几

/**

* 判断是否为闰年

* @param year

* @return

*/

public boolean isLeapYear(int year) {

if (year % 100 == 0 && year % 400 == 0) {

return true;

} else if (year % 100 != 0 && year % 4 == 0) {

return true;

}

return false;

}

/**

* 得到某月有多少天数

* @param isLeapyear

* @param month

* @return

*/

public int getDaysOfMonth(boolean isLeapyear, int month) {

switch (month) {

case 1:

case 3:

case 5:

case 7:

case 8:

case 10:

case 12:

daysOfMonth = 31;

break;

case 4:

case 6:

case 9:

case 11:

daysOfMonth = 30;

break;

case 2:

if (isLeapyear) {

daysOfMonth = 29;

} else {

daysOfMonth = 28;

}

}

return daysOfMonth;

}

/**

* 指定某年中的某月的第一天是星期几

* @param year

* @param month

* @return

*/

public int getWeekdayOfMonth(int year, int month){

Calendar cal = Calendar.getInstance();

cal.set(year, month-1, 1);

dayOfWeek = cal.get(Calendar.DAY_OF_WEEK)-1;

return dayOfWeek;

}

}

布局文件:

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

layout="@layout/layout_public_finish_menu"

/>

android:layout_width="match_parent"

android:layout_height="40dp"

android:background="@color/bg_home_gone_menu"

android:gravity="center"

android:orientation="horizontal"

>

android:id="@+id/id_img_select_time_less"

android:layout_width="wrap_content"

android:layout_height="match_parent"

android:layout_weight="1"

android:padding="5dp"

android:src="@mipmap/ic_sd_time_less"

android:background="@drawable/selector_public_btn_bg"

/>

android:id="@+id/id_tv_select_time_show"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_weight="4"

android:gravity="center"

android:text="年月"

android:textColor="@color/white"

android:textSize="@dimen/default_big"

/>

android:id="@+id/id_img_select_time_add"

android:layout_width="wrap_content"

android:layout_height="match_parent"

android:layout_weight="1"

android:padding="5dp"

android:src="@mipmap/ic_sd_time_add"

android:background="@drawable/selector_public_btn_bg"

/>

android:id="@+id/id_gv_select_item"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:background="@drawable/bg_rectangle_null_black_1"

android:clickable="true"

android:gravity="center"

android:layout_gravity="center"

android:clipChildren="true"

android:listSelector="@null"

android:numColumns="7"

android:padding="1dp"

android:layout_margin="5dp"

android:stretchMode="columnWidth"

/>

Item布局

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="@drawable/bg_rectangle_null_black_1">

android:id="@+id/id_tv_item_select_time_day"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:gravity="center"

android:text="天"

android:textSize="@dimen/default_big"

android:layout_margin="1dp"

android:textStyle="bold"

/>

android:id="@+id/id_img_item_select_time_logo"

android:layout_width="5dp"

android:layout_height="5dp"

android:layout_margin="3dp"

android:src="@drawable/shap_doorbell_oval_red"

android:visibility="gone"

/>

布局只供参考...可以根据需求进行修改

下面就看看简单的调用

//传入当前的年,月..已经选中的时间(20170830)

mAdapter = new CalendarAdapter(mContext, year_c, month_c, currentDayStr);

mIdGvSelectItem.setAdapter(mAdapter);

/**

* GridView Item的点击事件

*/

private class MyGvListener implements AdapterView.OnItemClickListener {

@Override

public void onItemClick(AdapterView> parent, View view, int position, long id) {

TextView mTv = (TextView) view.findViewById(R.id.id_tv_item_select_time_day);

boolean isOnClick = (boolean) mTv.getTag();

if (isOnClick) {

String time = mAdapter.getItemTime(position);

Intent mIntent = getIntent();

mIntent.putExtra("fileDate", time);

setResult(AppStart.SDVA_SDTA, mIntent);

finish();

Log.i(TAG,"当前选择的时间:" + time);

}

}

}

/**

* 点击事件逻辑处理

*/

private class MyListener implements View.OnClickListener {

@Override

public void onClick(View v) {

switch (v.getId()) {

//上一个月

case R.id.id_img_select_time_less:

mAdapter.lessMonth();

mHandler.sendEmptyMessage(UPDATA_TIME);

addTextToTopTextView(mIdTvSelectTimeShow);

break;

//下一个月

case R.id.id_img_select_time_add:

mAdapter.addMonth();

mHandler.sendEmptyMessage(UPDATA_TIME);

addTextToTopTextView(mIdTvSelectTimeShow);

break;

}

}

}

private Set dayEventCount = new HashSet<>();

//设置需要显示标签的实际

mAdapter.setSet(dayEventCount);

//更新

@Override

protected void uiHandlerMessage(Message msg) {

switch (msg.what) {

case UPDATA_TIME:

mAdapter.upDataMonth();

mAdapter.notifyDataSetChanged();

break;

}

}

调用部分的代码由于是从项目中直接复制出来的..代码的前后没有什么关联性,主要是说明功能的..请根据自己的项目进行调整..

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。