Android Studio 基础 之 获取系统Calendar 日历日程 （涉及指定日期时间判断是星期几的方法使用）的方法整理

 

目录

Android Studio 基础 之 获取系统Calendar 日历日程 （涉及指定日期时间判断是星期几的方法使用）的方法整理

一、简单介绍

二、实现原理

三、注意实现

四、效果预览

五、实现步骤

六、关键代码

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一、简单介绍

Android 开发中的一些基础操作，使用整理，便于后期使用。

本节介绍，Android 开发中，获取手机设备的系统Calendar 的 日历日程的方法，方法不唯一，欢迎指正。

 

二、实现原理

1、getContentResolver().query(Uri.parse(CALENDER_EVENT_URL), null, null, null, "dtstart"+" DESC");

获取日历日程事件 Cursor，然后循环获取每个日程事件

2、getContentResolver().query(Uri.parse(CALENDER_EVENT_URL), null, null, null, "dtstart"+" DESC");

"dtstart"+" DESC"，实现日历日程事件按日程事件开始时间降序排序得到日程事件结果

3、Cursor.getString(eventCursor.getColumnIndex("title")) 得到日程事件标题

4、Cursor.getString(eventCursor.getColumnIndex("description")) 得到日程事件描述

5、Cursor.getString(eventCursor.getColumnIndex("eventLocation")) 得到日程事件位置

6、Cursor.getString(eventCursor.getColumnIndex("dtstart"))  得到日程事件开始时间

7、Cursor.getString(eventCursor.getColumnIndex("dtend")) 得到日程事件结束时间

8、Calendar.getInstance().setTime(format.parse("yyyy-MM-dd HH:mm:ss")) 判断指定日期时间是星期几

 

三、注意实现

1、添加Calendar 相关权限

<uses-permission android:name="android.permission.READ_CALENDAR"/>

<uses-permission android:name="android.permission.WRITE_CALENDAR"/>

 

2、getContentResolver().query（） 最后一个参数进行数据排序，这里是 "dtstart"+" DESC" 日程事件开始时间降序排序， "dtstart"+" AXSC" 日程事件开始时间升序排序

 

四、效果预览

 

五、实现步骤

1、打开 Android Studio 新建一个工程，或者新建一个模块

 

2、默认操作，一路创建一个模块

 

3、创建一个 calendarUtil，编写获取日程日志事件的方法，CalenderDataStruct 日历日程事件的结构体

 

4、MainActivity ，测试 calendarUtil封装的方法

 

5、打包，在设备上测试，效果如上

 

六、关键代码

1、CalenderDataStruct

package com.example.calendartest;

/**
 * 日历日程数据结构
 */
public class CalenderDataStruct {
    String eventTitle = "";
    String startTime = "";
    String endTime = "";
    String description = "";
    String location = "";
    String week = "";

    public CalenderDataStruct(String eventTitle, String startTime, String endTime, String description, String location,String week) {
        this.eventTitle = eventTitle;
        this.startTime = startTime;
        this.endTime = endTime;
        this.description = description;
        this.location = location;
        this.week = week;
    }

    public String getEventTitle() {
        return eventTitle;
    }

    public void setEventTitle(String eventTitle) {
        this.eventTitle = eventTitle;
    }

    public String getStartTime() {
        return startTime;
    }

    public void setStartTime(String startTime) {
        this.startTime = startTime;
    }

    public String getEndTime() {
        return endTime;
    }

    public void setEndTime(String endTime) {
        this.endTime = endTime;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getLocation() {
        return location;
    }

    public void setLocation(String location) {
        this.location = location;
    }

    public String getWeek() {
        return week;
    }

    public void setWeek(String week) {
        this.week = week;
    }

    @Override
    public String toString() {
        return "CalenderDataStruct{" +
                "eventTitle='" + eventTitle + '\'' +
                ", startTime='" + startTime + '\'' +
                ", endTime='" + endTime + '\'' +
                ", description='" + description + '\'' +
                ", location='" + location + '\'' +
                ", week='" + week + '\'' +
                '}';
    }
}

 

2、calendarUtil

package com.example.calendartest;

import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.telephony.TelephonyManager;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;

public class calendarUtil {

    private static String CALENDER_URL = "content://com.android.calendar/calendars";
    private static String CALENDER_EVENT_URL = "content://com.android.calendar/events";
    private static String CALENDER_REMINDER_URL = "content://com.android.calendar/reminders";
    private static TelephonyManager mTm;


    public static ArrayList<CalenderDataStruct> GetCalenderSchedule(Context context){

        String startTime = "";
        String endTime = "";
        String eventTitle = "";
        String description = "";
        String location = "";
        String week = "";

        ArrayList<CalenderDataStruct> arr=new ArrayList<CalenderDataStruct>();
        Cursor eventCursor = context.getContentResolver().query(Uri.parse(CALENDER_EVENT_URL), null,
                null, null,  "dtstart"+" DESC");
        while (eventCursor.moveToNext()){

            eventTitle = eventCursor.getString(eventCursor.getColumnIndex("title"));
            description = eventCursor.getString(eventCursor.getColumnIndex("description"));
            location = eventCursor.getString(eventCursor.getColumnIndex("eventLocation"));
            startTime = timeStamp2Date(Long.parseLong(eventCursor.getString(eventCursor.getColumnIndex("dtstart"))));
            endTime = timeStamp2Date(Long.parseLong(eventCursor.getString(eventCursor.getColumnIndex("dtend"))));
            week = ""+ (getWeek(startTime));
            CalenderDataStruct item=new CalenderDataStruct(eventTitle, startTime, endTime,description, location,week);

            arr.add(item);
        }
        return arr;
    }


    private static JSONArray getcalendar(Context context){
        String startTime = "";
        String endTime = "";
        String eventTitle = "";
        String description = "";
        String location = "";

        JSONArray arr=new JSONArray();
        Cursor eventCursor = context.getContentResolver().query(Uri.parse(CALENDER_EVENT_URL), null,
                null, null, null);
        while (eventCursor.moveToNext()){
            JSONObject json=new JSONObject();
            eventTitle = eventCursor.getString(eventCursor.getColumnIndex("title"));
            description = eventCursor.getString(eventCursor.getColumnIndex("description"));
            location = eventCursor.getString(eventCursor.getColumnIndex("eventLocation"));
            startTime = timeStamp2Date(Long.parseLong(eventCursor.getString(eventCursor.getColumnIndex("dtstart"))));
            endTime = timeStamp2Date(Long.parseLong(eventCursor.getString(eventCursor.getColumnIndex("dtend"))));
            try {
                json.put("eventTitle",eventTitle);
                json.put("description",description);
                json.put("location",location);
                json.put("startTime",startTime);
                json.put("endTime",endTime);
            } catch (JSONException e) {
                e.printStackTrace();
            }
            arr.put(json);
        }
        return arr;
    }

    /**
     * 时间戳转换为字符串
     * @param time:时间戳
     * @return
     */
    private static String timeStamp2Date(long time) {
        String format = "yyyy-MM-dd HH:mm:ss";
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        return sdf.format(new Date(time));
    }

    /**
     * 判断当前日期是星期几
     *
     * @param  pTime     设置的需要判断的时间  //格式如2012-09-08
     *

     * @return dayForWeek 判断结果
     * @Exception 发生异常
     */

//  String pTime = "2012-03-12";
    private static int getWeek(String pTime) {


        int Week = 0;


        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Calendar c = Calendar.getInstance();
        try {

            c.setTime(format.parse(pTime));

        } catch (ParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        if (c.get(Calendar.DAY_OF_WEEK) == 1) {
            Week = 0;
        }
        if (c.get(Calendar.DAY_OF_WEEK) == 2) {
            Week = 1;
        }
        if (c.get(Calendar.DAY_OF_WEEK) == 3) {
            Week = 2;
        }
        if (c.get(Calendar.DAY_OF_WEEK) == 4) {
            Week = 3;
        }
        if (c.get(Calendar.DAY_OF_WEEK) == 5) {
            Week = 4;
        }
        if (c.get(Calendar.DAY_OF_WEEK) == 6) {
            Week = 5;
        }
        if (c.get(Calendar.DAY_OF_WEEK) == 7) {
            Week = 6;
        }



        return Week;
    }
}

 

3、MainActivity

package com.example.calendartest;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    private  static  final String TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ArrayList<CalenderDataStruct> calenderDataStructs = calendarUtil.GetCalenderSchedule(this);
        Log.i(TAG, "onCreate: calenderDataStructs "+ calenderDataStructs.size());
        for (CalenderDataStruct item : calenderDataStructs){


            Log.i(TAG, "onCreate: CalenderDataStruct "+ item.toString());
        }
    }
}

 

4、AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.calendartest">
<uses-permission android:name="android.permission.READ_CALENDAR"/>
    <uses-permission android:name="android.permission.WRITE_CALENDAR"/>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

 

本文地址：https://blog.csdn.net/u014361280/article/details/108152733