日历视图使用

    <CalendarView
      android:id="@+id/calenderView"
      android:layout_width="match_parent"
      android:layout_height="match_parent">

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <CalendarView
        android:id="@+id/calenderView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:selectedWeekBackgroundColor="#aff"
        android:focusedMonthDateColor="#f00"
        android:weekSeparatorLineColor="#ff0"
        android:unfocusedMonthDateColor="#f9f" />


</android.support.constraint.ConstraintLayout>

package com.example.user.calender;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.CalendarView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    CalendarView calendarView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        calendarView = (CalendarView) findViewById(R.id.calenderView);
        //calendarView 监听事件
        calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
            @Override
            public void onSelectedDayChange( CalendarView view, int year, int month, int dayOfMonth) {
                //显示用户选择的日期
                Toast.makeText(MainActivity.this,year + "年" + month + "月" + dayOfMonth + "日",Toast.LENGTH_LONG).show();
            }
        });
    }
}