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):

"android.permission.READ_CALENDAR"/>
"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:

"1.0" encoding="utf-8"?>
"http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

    android:layout_width="fill_parent"
        android:layout_height="wrap_content"
    android:text="@string/hello"
    />

        android:id="@+id/readUserButton"
        android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Get a User"
    />

        android:id="@+id/readEventButton"
        android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Get a Event"
    />

        android:id="@+id/writeEventButton"
        android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Input a Event"
    />

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:

"1.0" encoding="utf-8"?>
"http://schemas.android.com/apk/res/android"
      package="com.tutor.calendardemo"
      android:versionCode="1"
      android:versionName="1.0">
    "@drawable/icon" android:label="@string/app_name">
        ".CalendarDemo"
                  android:label="@string/app_name">

                "android.intent.action.MAIN" />
                "android.intent.category.LAUNCHER" />



    "7" />
    "android.permission.READ_CALENDAR"/>
    "android.permission.WRITE_CALENDAR"/>

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