Android高手进阶教程(二十三)之---Android中的日历读写操作!!!

大家好,好久没有更新blog了，今天给大家分享一下Android中一些自带日历的操作方法,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):

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

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:

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:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns: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:

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 extends Activity implements OnClickListener {private Button mReadUserButton;private Button mReadEventButton;private Button mWriteEventButton;private static String calanderURL = "";private static String calanderEventURL = ""; private static String 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 public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); setupViews(); } private void setupViews(){ 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); } @Overridepublic void onClick(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();}}else if(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();}}else if(v == mWriteEventButton){//获取要出入的gmail账户的idString 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 = new ContentValues(); 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); long start = mCalendar.getTime().getTime(); mCalendar.set(Calendar.HOUR_OF_DAY,11); long end = mCalendar.getTime().getTime(); event.put("dtstart", start); event.put("dtend", end); event.put("hasAlarm",1); Uri newEvent = getContentResolver().insert(Uri.parse(calanderEventURL), event); long id = Long.parseLong( newEvent.getLastPathSegment() ); ContentValues values = new ContentValues(); 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:

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

第五步:运行上述Android工程,查看效果：

运行首界面获取登录账户名

获取事件title 插入一个事件

查看日历多了一条事件查看事件详情

Ok今天就讲到这里，呵呵~

源代码下载地址:http://download.csdn.net/source/3004309

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