Android实现日历控件示例代码

做的是一个酒店的项目，可以选择入住和离开的日期。声明为了省事在网上找的资料，自己修改的逻辑，希望对需要的朋友有帮助。喜欢的给个好评。谢谢啦！祝生活愉快！

先上图

 

第一步，搭建布局xml

<ScrollView xmlns:Android="Http://schemas.android.com/apk/res/android"
  xmlns:app="http://schemas.android.com/apk/res-auto"
  android:layout_width="match_parent"
  android:layout_height="match_parent">
  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <FrameLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content">
      <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/days_detail"
        android:gravity="center"
        android:padding="16dp"
        android:text="选择住店离店日期"
        android:textColor="@color/white"
        android:textSize="18sp" />
      <ImageView
        android:id="@+id/back_to_up"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="10dp"
        android:src="@drawable/backto" />
    </FrameLayout>
    <FrameLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content">
      <View
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:background="@color/days_detail" />
      <android.support.v7.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:layout_marginTop="20dp"
        android:padding="10dp"
        app:cardCornerRadius="10dp"
        app:cardElevation="16dp">
        <LinearLayout
          android:id="@+id/ll"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:orientation="vertical" />
      </android.support.v7.widget.CardView>
    </FrameLayout>
  </LinearLayout>
</ScrollView>

第二部在编写逻辑

 LinearLayout ll;
  MyCalendar c1;
  Date date;
  String nowday;
  long nd = 1000 * 24L * 60L * 60L;//一天的毫秒数
  SimpleDateFORMat simpleDateFormat, sd1, sd2;
  SharedPreferences sp;
  SharedPreferences.Editor editor;
  private String inday, outday//日期
   sp_inday, sp_outday;//周几
 Activity  extends BaseActivity implements MyCalendar.OnDaySelectListener {

继承BaseActivity实现点击日历的监听回调

 private void init() {
    List<String> listDate = getDateList();
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
        ViewGroup.LayoutParams.WRAP_CONTENT);
    for (int i = 0; i < listDate.size(); i++) {
      c1 = new MyCalendar(this);
      c1.setLayoutParams(params);
      Date date = null;
      try {
        date = simpleDateFormat.parse(listDate.get(i));
      } catch (ParseException e) {
        e.printStackTrace();
      }
      if (!"".equals(sp_inday)) {
        c1.setInDay(sp_inday);
      }
      if (!"".equals(sp_outday)) {
        c1.setOutDay(sp_outday);
      }
      c1.setTheDay(date);
      c1.setOnDaySelectListener(this);
      ll.addView(c1);
    }
  }
  @Override
  public void onDaySelectListener(View view, String date) {
    //若日历日期小于当前日期，或日历日期-当前日期超过三个月，则不能点击
    try {
      if (simpleDateFormat.parse(date).getTime() < simpleDateFormat.parse(nowday).getTime()) {
        return;
      }
      long dayxc = (simpleDateFormat.parse(date).getTime() - simpleDateFormat.parse(nowday).getTime()) / nd;
      if (dayxc > 90) {
        return;
      }
    } catch (ParseException e) {
      e.printStackTrace();
    }
    //若以前已经选择了日期，则在进入日历后会显示以选择的日期，该部分作用则是重新点击日历时，清空以前选择的数据（包括背景图案）
    if (!"".equals(sp_inday)) {
      c1.viewIn.setBackgroundColor(Color.WHITE);
      ((TextView) c1.viewIn.findViewById(R.id.tv_calendar_day)).setTextColor(Color.BLACK);
      ((TextView) c1.viewIn.findViewById(R.id.tv_calendar)).setText("");
    }
    if (!"".equals(sp_outday)) {
      c1.viewOut.setBackgroundColor(Color.WHITE);
      ((TextView) c1.viewOut.findViewById(R.id.tv_calendar_day)).setTextColor(Color.BLACK);
      ((TextView) c1.viewOut.findViewById(R.id.tv_calendar)).setText("");
    }
    String dateDay = date.split("-")[2];
    if (Integer.parseInt(dateDay) < 10) {
      dateDay = date.split("-")[2].replace("0", "");
    }
    TextView textDayView = (TextView) view.findViewById(R.id.tv_calendar_day);
    TextView textView = (TextView) view.findViewById(R.id.tv_calendar);
    view.setBackgroundColor(Color.parseColor("#33B5E5"));
    textDayView.setTextColor(Color.WHITE);
    if (null == inday || inday.equals("")) {
      textDayView.setText(dateDay);
      textView.setText("入住");
      inday = date;
    } else {
      if (inday.equals(date)) {
        view.setBackgroundColor(Color.WHITE);
        textDayView.setText(dateDay);
        textDayView.setTextColor(Color.BLACK);
        textView.setText("");
        inday = "";
      } else {
        try {
          if (simpleDateFormat.parse(date).getTime() < simpleDateFormat.parse(inday).getTime()) {
            view.setBackgroundColor(Color.WHITE);
            textDayView.setTextColor(Color.BLACK);
            Toast.makeText(CalendarActivity.this, "离开日期不能小于入住日期", Toast.LENGTH_SHORT).show();
            return;
          }
        } catch (ParseException e) {
          e.printStackTrace();
        }
        textDayView.setText(dateDay);
        textView.setText("离开");
        outday = date;
        editor.putString("dateIn", inday);
        editor.putString("dateOut", outday);
        editor.commit();
        finish();
      }
    }
  }
  //根据当前日期，向后数三个月（若当前day不是1号，为满足至少90天，则需要向后数4个月）
  @SuppressLint("SimpleDateFormat")
  public List<String> getDateList() {
    List<String> list = new ArrayList<String>();
    Date date = new Date();
    int nowMon = date.getMonth() + 1;
    String yyyy = sd1.format(date);
    String dd = sd2.format(date);
    if (nowMon == 9) {
      list.add(simpleDateFormat.format(date));
      list.add(yyyy + "-10-" + dd);
      list.add(yyyy + "-11-" + dd);
      if (!dd.equals("01")) {
        list.add(yyyy + "-12-" + dd);
      }
    } else if (nowMon == 10) {
      list.add(yyyy + "-10-" + dd);
      list.add(yyyy + "-11-" + dd);
      list.add(yyyy + "-12-" + dd);
      if (!dd.equals("01")) {
        list.add((Integer.parseInt(yyyy) + 1) + "-01-" + dd);
      }
    } else if (nowMon == 11) {
      list.add(yyyy + "-11-" + dd);
      list.add(yyyy + "-12-" + dd);
      list.add((Integer.parseInt(yyyy) + 1) + "-01-" + dd);
      if (!dd.equals("01")) {
        list.add((Integer.parseInt(yyyy) + 1) + "-02-" + dd);
      }
    } else if (nowMon == 12) {
      list.add(yyyy + "-12-" + dd);
      list.add((Integer.parseInt(yyyy) + 1) + "-01-" + dd);
      list.add((Integer.parseInt(yyyy) + 1) + "-02-" + dd);
      if (!dd.equals("01")) {
        list.add((Integer.parseInt(yyyy) + 1) + "-03-" + dd);
      }
    } else {
      list.add(yyyy + "-" + getMon(nowMon) + "-" + dd);
      list.add(yyyy + "-" + getMon((nowMon + 1)) + "-" + dd);
      list.add(yyyy + "-" + getMon((nowMon + 2)) + "-" + dd);
      if (!dd.equals("01")) {
        list.add(yyyy + "-" + getMon((nowMon + 3)) + "-" + dd);
      }
    }
    return list;
  }
  public String getMon(int mon) {
    String month = "";
    if (mon < 10) {
      month = "0" + mon;
    } else {
      month = "" + mon;
    }
    return month;
  }

第三部 编写监听，自定义的控件

public class MyCalendar extends LinearLayout {
  private static Context context;
  private Date theInDay;
  private String inday = "", outday = "";
  public static View viewIn;
  public static View viewOut;
  public static String positionIn;
  public static String positionOut;
  public static final int WEEKDAYS = 7;
  public static String[] WEEK = {
      "周日",
      "周一",
      "周二",
      "周三",
      "周四",
      "周五",
      "周六"
  };
  static long nd = 1000 * 24L * 60L * 60L;//一天的毫秒数
  private List<String> gvList;//存放天
  private OnDaySelectListener callBack;//回调函数
  private static String nowday = new SimpleDateFormat("yyyy-MM-dd").format(new Date());
  private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMM");//日期格式化
  private static SimpleDateFormat dateFormat2 = new SimpleDateFormat("yyyy-MM-dd");//日期格式化
  
  public MyCalendar(Context context) {
    super(context);
    MyCalendar.context = context;
  }
  
  public static String DateToWeek(Date date) {
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(date);
    int dayIndex = calendar.get(Calendar.DAY_OF_WEEK);
    if (dayIndex < 1 || dayIndex > WEEKDAYS) {
      return null;
    }
    return WEEK[dayIndex - 1];
  }
  
  public static long getDayDiff(Date begin, Date end) {
    long day = 1;
    if (end.getTime() < begin.getTime()) {
      day = -1;
    } else if (end.getTime() == begin.getTime()) {
      day = 1;
    } else {
      day += (end.getTime() - begin.getTime()) / (24 * 60 * 60 * 1000);
    }
    return day;
  }
  
  public static String format1(String time) throws ParseException {
    SimpleDateFormat from = new SimpleDateFormat("yyyy-MM-dd", Locale.CHINA);
    SimpleDateFormat to = new SimpleDateFormat("MM.dd", Locale.CHINA);
    return to.format(from.parse(time));
  }
  
  public static String getSpecifiedDayAfter(String specifiedDay) {
    Calendar c = Calendar.getInstance();
    Date date = null;
    try {
      date = new SimpleDateFormat("yy-MM-dd").parse(specifiedDay);
    } catch (ParseException e) {
      e.printStackTrace();
    }
    c.setTime(date);
    int day = c.get(Calendar.DATE);
    c.set(Calendar.DATE, day + 1);
    String dayAfter = new SimpleDateFormat("yyyy-MM-dd")
        .format(c.getTime());
    return dayAfter;
  }
  
  public MyCalendar(Context context, AttributeSet attrs) {
    super(context, attrs);
    MyCalendar.context = context;
  }
  public void setInDay(String inday) {
    this.inday = inday;
  }
  public void setOutDay(String outday) {
    this.outday = outday;
  }
  public void setTheDay(Date dateIn) {
    this.theInDay = dateIn;
    init();
  }
  
  private void init() {
    gvList = new ArrayList<String>();//存放天
    final Calendar cal = Calendar.getInstance();//获取日历实例
    cal.setTime(theInDay);//cal设置为当天的
    cal.set(Calendar.DATE, 1);//cal设置当前day为当前月第一天
    int tempSum = countNeedHowMuchEmpety(cal);//获取当前月第一天为星期几
    int dayNumInMonth = getDayNumInMonth(cal);//获取当前月有多少天
    setGvListData(tempSum, dayNumInMonth, cal.get(Calendar.YEAR) + "-" + getMonth((cal.get(Calendar.MONTH) + 1)));
    View view = LayoutInflater.from(context).inflate(R.layout.comm_calendar, this, true);//获取布局，开始初始化
    TextView tv_year = (TextView) view.findViewById(R.id.tv_year);
    if (cal.get(Calendar.YEAR) > new Date().getYear()) {
      tv_year.setVisibility(View.VISIBLE);
      tv_year.setText(cal.get(Calendar.YEAR) + "年");
    }
    TextView tv_month = (TextView) view.findViewById(R.id.tv_month);
    tv_month.setText(String.valueOf(theInDay.getMonth() + 1));
    MyGridView gv = (MyGridView) view.findViewById(R.id.gv_calendar);
    calendarGridViewAdapter gridViewAdapter = new calendarGridViewAdapter(gvList, inday, outday);
    gv.setAdapter(gridViewAdapter);
    gv.setOnItemClickListener(new OnItemClickListener() {
      @Override
      public void onItemClick(AdapterView<?> adapterView, View arg1, int position, long arg3) {
        String choiceDay = (String) adapterView.getAdapter().getItem(position);
        String[] date = choiceDay.split(",");
        String day = date[1];
        if (!" ".equals(day)) {
          if (Integer.parseInt(day) < 10) {
            day = "0" + date[1];
          }
          choiceDay = date[0] + "-" + day;
          if (callBack != null) {//调用回调函数回调数据
            callBack.onDaySelectListener(arg1, choiceDay);
          }
        }
      }
    });
  }
  
  private void setGvListData(int tempSum, int dayNumInMonth, String YM) {
    gvList.clear();
    for (int i = 0; i < tempSum; i++) {
      gvList.add(" , ");
    }
    for (int j = 1; j <= dayNumInMonth; j++) {
      gvList.add(YM + "," + String.valueOf(j));
    }
  }
  private String getMonth(int month) {
    String mon = "";
    if (month < 10) {
      mon = "0" + month;
    } else {
      mon = "" + month;
    }
    return mon;
  }
  
  private int getDayNumInMonth(Calendar cal) {
    return cal.getActualMaximum(Calendar.DATE);
  }
  
  private int countNeedHowMuchEmpety(Calendar cal) {
    int firstDayInWeek = cal.get(Calendar.DAY_OF_WEEK) - 1;
    Log.e("MyCalendar", String.valueOf(firstDayInWeek));
    return firstDayInWeek;
  }
  
  static class GrideViewHolder {
    TextView tvDay, tv;
  }
  
  static class calendarGridViewAdapter extends BaseAdapter {
    List<String> gvList;//存放天
    String inday, outday;
    public calendarGridViewAdapter(List<String> gvList, String inday, String outday) {
      super();
      this.gvList = gvList;
      this.inday = inday;
      this.outday = outday;
    }
    @Override
    public int getCount() {
      return gvList.size();
    }
    @Override
    public String getItem(int position) {
      return gvList.get(position);
    }
    @Override
    public long getItemId(int position) {
      return position;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      GrideViewHolder holder;
      if (convertView == null) {
        holder = new GrideViewHolder();
        convertView = inflate(context, R.layout.common_calendar_gridview_item, null);
        holder.tv = (TextView) convertView.findViewById(R.id.tv_calendar);
        holder.tvDay = (TextView) convertView.findViewById(R.id.tv_calendar_day);
        convertView.setTag(holder);
      } else {
        holder = (GrideViewHolder) convertView.getTag();
      }
      String[] date = getItem(position).split(",");
      holder.tvDay.setText(date[1]);
      if ((position + 1) % 7 == 0 || (position) % 7 == 0) {
        holder.tvDay.setTextColor(Color.parseColor("#339900"));
      }
      if (!date[1].equals(" ")) {
        String day = date[1];
        if (Integer.parseInt(date[1]) < 10) {
          day = "0" + date[1];
        }
        if ((date[0] + "-" + day).equals(nowday)) {
          holder.tvDay.setTextColor(Color.parseColor("#FF6600"));
          holder.tvDay.setTextSize(15);
          holder.tvDay.setText("今天");
        }
        if (!"".equals(inday) && (date[0] + "-" + day).equals(inday)) {
          convertView.setBackgroundColor(Color.parseColor("#33B5E5"));
          holder.tvDay.setTextColor(Color.WHITE);
          holder.tvDay.setText(date[1]);
          holder.tv.setText("入住");
          viewIn = convertView;
          positionIn = date[1];
        }
        if (!"".equals(outday) && (date[0] + "-" + day).equals(outday)) {
          convertView.setBackgroundColor(Color.parseColor("#33B5E5"));
          holder.tvDay.setTextColor(Color.WHITE);
          holder.tvDay.setText(date[1]);
          holder.tv.setText("离开");
          viewOut = convertView;
          positionOut = date[1];
        }
        try {
          //若日历日期<当前日期，则不能选择
          if (dateFormat2.parse(date[0] + "-" + day).getTime() < dateFormat2.parse(nowday).getTime()) {
            holder.tvDay.setTextColor(Color.parseColor("#999999"));
          }
          //若日历日期-当前日期>90天，则不能选择
          long dayxc = (dateFormat2.parse(date[0] + "-" + day).getTime() - dateFormat2.parse(nowday).getTime()) / nd;
          if (dayxc > 90) {
            holder.tvDay.setTextColor(Color.parseColor("#999999"));
          }
        } catch (ParseException e) {
          e.printStackTrace();
        }
      }
      return convertView;
    }
  }
  
  public interface OnDaySelectListener {
    void onDaySelectListener(View view, String date);
  }
  
  public void setOnDaySelectListener(OnDaySelectListener o) {
    callBack = o;
  }
}

在界面显示选择的日期

 

接下来就是为了显示选择的日期进行逻辑判断，包括字符串的转换以及日期格式的转换，日期的计算等。

simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
    if ("".equals(home_into_date.getText().toString())
        && "".equals(home_out_date.getText().toString())) {
      inday = simpleDateFormat.format(new Date());
      try {
        //转换时间格式
        String changeDate = MyCalendar.format1(inday);
        Date dateIn = simpleDateFormat.parse(inday);
        //将日期转换成周
        String weekIn = MyCalendar.DateToWeek(dateIn);
        home_into_date.setText("" + changeDate + weekIn);
        String nextDay = MyCalendar.format1(MyCalendar.getSpecifiedDayAfter(inday));
        Date dateOut = simpleDateFormat.parse(MyCalendar.getSpecifiedDayAfter(inday));
        String weekOut = MyCalendar.DateToWeek(dateOut);
        home_out_date.setText("" + nextDay + weekOut);
        long days = MyCalendar.getDayDiff(dateIn, dateOut);
        home_total_days.setText("共" + (days - 1) + "晚");
      } catch (ParseException e) {
        e.printStackTrace();
      }
    } else {
    //这里使用sp传的值
      inday = pro.getString("dateIn", "");
      outday = pro.getString("dateOut", "");
      try {
        String changeDate = MyCalendar.format1(inday);
        Date dateIn = simpleDateFormat.parse(inday);
        //将日期转换成周
        String weekIn = MyCalendar.DateToWeek(dateIn);
        home_into_date.setText("" + changeDate + weekIn);
        String outDay = MyCalendar.format1(outday);
        Date dateOut = simpleDateFormat.parse(outday);
        String weekOut = MyCalendar.DateToWeek(dateOut);
        home_out_date.setText("" + outDay + weekOut);
        long days = MyCalendar.getDayDiff(dateIn, dateOut);
        home_total_days.setText("共" + (days - 1) + "晚");
      } catch (ParseException e) {
        e.printStackTrace();
      }

其中有几个布局，给图自己写吧

comm_calendar

 

common_calendar_gridview_item

<LinearLayout
    android:layout_width="0dp"
    android:layout_height="match_parent"
    android:layout_weight="1"
    android:gravity="center"
    android:orientation="vertical">
    <LinearLayout
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center"
      android:gravity="center"
      android:orientation="vertical">
      <TextView
        android:id="@+id/tv_calendar_day"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:textSize="15sp" />
      <TextView
        android:id="@+id/tv_calendar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:gravity="center"
        android:textColor="#FFFFFF"
        android:textSize="15sp" />
    </LinearLayout>
    <View
      android:layout_width="match_parent"
      android:layout_height="0.5dp"
      android:background="#E4E4E4" />
  </LinearLayout>

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