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);
     }

     @Override
     public 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 = 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[email protected]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