20.Android中的日历读写操作

最新推荐文章于 2025-06-18 11:58:18 发布

转载最新推荐文章于 2025-06-18 11:58:18 发布 · 5.8k 阅读

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#layout #android #null #日历 #calendar

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本文详细介绍如何在Android应用中实现日历的读写功能，包括权限申请、使用ContentProvider进行读写操作，并提供了一个完整的示例代码。

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大家好，好久没有更新blog了，今天给大家分享一下Android日历读写的操作方法，这里主要用到了ContentProiver的知识。如果大家不明白ContentProvider建议先查一下资料，知道它是干什么的。这样更容易下面的例子。

好了废话不说，这里提个醒，Android中的日历只有真机才有，模拟上是没有的，所以测试环境一定要真机！！

因为日历是系统自带的，所以我们读写它一定要申请权限，也就是在AndroidManifest.xml加如下两行代码(一个读一个写)：

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

Android中日历用了三个URL，分别是日历用户的URL，事件的URL，事件提醒URL，三个URL在Android2.1之前是如下的样子：

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calanderURL = 
"content://calendar/calendars";
calanderEventURL ="content://calendar/events";
calanderRemiderURL="content://calendar/reminders";

但是在Android2.2版本以后，三个URL有了改变，变成如下的样子：

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calanderURL = 
"content://com.android.calendar/calendars";
calanderEventURL ="content://com.android.calendar/events";
calanderRemiderURL ="content://com.android.calendar/reminders";

还是老样子，为了让大家更好的理解，我写了一个简单的Demo,大家按照我的步骤一步一步的来：

第一步：新建一个Android工程命名为CalendarDemo

第二步：修改main.xml布局文件，增加了三个按钮，代码如下：

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<?xmlversion="1.0"encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hello"
        />
    <Button
        android:id="@+id/readUserButton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Get a User"
        />
    <Button
        android:id="@+id/readEventButton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Get a Event"
        />
    <Button
        android:id="@+id/writeEventButton"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Input a Event"
        />
</LinearLayout>

第三步：修改主核心程序CalendarDemo.java，代码如下：

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package 
com.tutor.calendardemo;
 
import 
java.util.Calendar;
 
import 
android.app.Activity;
import 
android.content.ContentValues;
import 
android.database.Cursor;
import 
android.net.Uri;
import 
android.os.Build;
import 
android.os.Bundle;
import 
android.view.View;
import 
android.view.View.OnClickListener;
import 
android.widget.Button;
import 
android.widget.Toast;
 
public 
class CalendarDemo extendsActivityimplementsOnClickListener {
    privateButton mReadUserButton;
    privateButton mReadEventButton;
    privateButton mWriteEventButton;
 
    privatestaticString calanderURL ="";
    privatestaticString calanderEventURL ="";
    privatestaticString calanderRemiderURL ="";
    // 为了兼容不同版本的日历,2.2以后url发生改变
    static{
        if(Integer.parseInt(Build.VERSION.SDK) >=8) {
            calanderURL ="content://com.android.calendar/calendars";
            calanderEventURL ="content://com.android.calendar/events";
            calanderRemiderURL ="content://com.android.calendar/reminders";
 
        }else{
            calanderURL ="content://calendar/calendars";
            calanderEventURL ="content://calendar/events";
            calanderRemiderURL ="content://calendar/reminders";
        }
    }
 
    @Override
    publicvoidonCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
 
        setupViews();
    }
 
    privatevoidsetupViews() {
        mReadUserButton = (Button) findViewById(R.id.readUserButton);
        mReadEventButton = (Button) findViewById(R.id.readEventButton);
        mWriteEventButton = (Button) findViewById(R.id.writeEventButton);
        mReadUserButton.setOnClickListener(this);
        mReadEventButton.setOnClickListener(this);
        mWriteEventButton.setOnClickListener(this);
    }
 
    @Override
    publicvoidonClick(View v) {
        if(v == mReadUserButton) {
 
            Cursor userCursor = getContentResolver().query(
                    Uri.parse(calanderURL),null,null,null,null);
            if(userCursor.getCount() >0) {
                userCursor.moveToFirst();
                String userName = userCursor.getString(userCursor
                        .getColumnIndex("name"));
                Toast.makeText(CalendarDemo.this, userName, Toast.LENGTH_LONG)
                        .show();
            }
        }elseif(v == mReadEventButton) {
            Cursor eventCursor = getContentResolver().query(
                    Uri.parse(calanderEventURL),null,null,null,null);
            if(eventCursor.getCount() >0) {
                eventCursor.moveToLast();
                String eventTitle = eventCursor.getString(eventCursor
                        .getColumnIndex("title"));
                Toast.makeText(CalendarDemo.this, eventTitle, Toast.LENGTH_LONG)
                        .show();
            }
        }elseif(v == mWriteEventButton) {
            // 获取要出入的gmail账户的id
            String calId ="";
            Cursor userCursor = getContentResolver().query(
                    Uri.parse(calanderURL),null,null,null,null);
            if(userCursor.getCount() >0) {
                userCursor.moveToFirst();
                calId = userCursor.getString(userCursor.getColumnIndex("_id"));
 
            }
            ContentValues event =newContentValues();
            event.put("title","与苍井空小姐动作交流");
            event.put("description",
                    "Frankie受空姐邀请,今天晚上10点以后将在Sheraton动作交流.lol~");
            // 插入hoohbood@gmail.com这个账户
            event.put("calendar_id", calId);
 
            Calendar mCalendar = Calendar.getInstance();
            mCalendar.set(Calendar.HOUR_OF_DAY,10);
            longstart = mCalendar.getTime().getTime();
            mCalendar.set(Calendar.HOUR_OF_DAY,11);
            longend = mCalendar.getTime().getTime();
 
            event.put("dtstart", start);
            event.put("dtend", end);
            event.put("hasAlarm",1);
 
            Uri newEvent = getContentResolver().insert(
                    Uri.parse(calanderEventURL), event);
            longid = Long.parseLong(newEvent.getLastPathSegment());
            ContentValues values =newContentValues();
            values.put("event_id", id);
            // 提前10分钟有提醒
            values.put("minutes",10);
            getContentResolver().insert(Uri.parse(calanderRemiderURL), values);
            Toast.makeText(CalendarDemo.this,"插入事件成功!!!",
 Toast.LENGTH_LONG)
                    .show();
        }
    }
}

第四步：在AndroidManifest.xml中申请权限，代码如下：

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<?xmlversion="1.0"encoding="utf-8"?>
<manifestxmlns:android="http://schemas.android.com/apk/res/android"
    package="com.tutor.calendardemo"android:versionCode="1"
    android:versionName="1.0">
    <applicationandroid:icon="@drawable/icon"android:label="@string/app_name">
        <activityandroid:name=".CalendarDemo"android:label="@string/app_name">
            <intent-filter>
                <actionandroid:name="android.intent.action.MAIN"/>
                <categoryandroid:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
        </activity>
    </application>
    <uses-sdkandroid:minSdkVersion="7"/>
    <uses-permissionandroid:name="android.permission.READ_CALENDAR"/>
    <uses-permissionandroid:name="android.permission.WRITE_CALENDAR"/>
</manifest>