Android高手進階教程(二十三)之---Android中的日曆讀寫操作!!!

大家好,好久沒有更新blog了，今天給大家分享一下Android中一些自帶日曆的操作方法,這裡主要用到了ContentProiver的知識.如果大家不明白ContentProvider建議先查一下資料，知道它是幹什麼的。這樣更容易下面的例子.

好了廢話不說,這裡提個醒，Android中的日曆,只有真機才有，模擬上是沒有的，所以測試環境一定要真機！！

因為日曆是系統自帶的，所以我們讀寫它一定要申請許可權,也就是在AndroidManifest.xml加如下兩行程式碼(一個讀一個寫):

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

Android中日曆用了三個URL,分別是日曆使用者的URL,事件的URL，事件提醒URL,三個URL在Android2.1之前是如下的樣子：

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

但是在Android2.2版本以後,三個URL有了改變，變成如下的樣子:

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

還是老樣子,為了讓大家更好的理解，我寫了一個簡單的Demo,大家按照我的步驟一步一步的來:

第一步:新建一個Android工程命名為CalendarDemo.

第二步:修改main.xml佈局檔案,增加了三個按鈕,程式碼如下:

<?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:修改主核心程式CalendarDemo.java，程式碼如下:

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 = ""; //為了相容不同版本的日曆,2.2以後url發生改變 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){ //獲取要出入的gmail賬戶的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", "與蒼井空小姐動作交流"); event.put("description", "Frankie受空姐邀請,今天晚上10點以後將在Sheraton動作交流.lol~"); //插入hoohbood@gmail.com這個賬戶 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分鐘有提醒 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中申請許可權,程式碼如下:

<?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:執行上述Android工程,檢視效果：

                  執行首介面                                                      獲取登入賬戶名

 

                         獲取事件title                                             插入一個事件

 

                     檢視日曆多了一條事件                                       檢視事件詳情

 

Ok今天就講到這裡，呵呵~

原始碼下載地址:http://download.csdn.net/source/3004309