今天我們要寫一下Android Widget的開發,由於快點淩晨,我就不說的太具體了,同志們就模仿吧!首先看一下:
下面是Demo的詳細步驟:
一、建立一個Android工程命名為:WidgetDemo.
二、準備素材,一個是Widget的表徵圖,一個是Widget的背景。存放目錄如:
三、修改string.xml檔案如下:
<?xml version="1.0" encoding="utf-8"?><br /><resources><br /> <string name="hello">Hello World, WidetDemo!</string><br /> <string name="app_name">DaysToWorldCup</string><br /></resources><br />
四、建立Widget內容提供者檔案,我們在res下建立xml檔案夾,並且建立一個widget_provider.xml代碼入下:
<?xml version="1.0" encoding="utf-8"?><br /><appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"<br />android:minWidth="50dip"<br />android:minHeight="50dip"<br />android:updatePeriodMillis="10000"<br />android:initialLayout="@layout/main"<br />/>
五、修改main.xml布局,代碼如下:
<?xml version="1.0" encoding="utf-8"?><br /><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> android:background="@drawable/wordcup"<br /> ><br /><TextView<br />android:id="@+id/wordcup"<br /> android:layout_width="fill_parent"<br /> android:layout_height="wrap_content"<br /> android:text="@string/hello"<br /> android:textSize="12px"<br /> android:textColor="#ff0000"<br /> /><br /></LinearLayout><br />
六、修改WidgetDemo.java代碼如下:
package com.android.tutor;<br />import java.util.Calendar;<br />import java.util.Date;<br />import java.util.GregorianCalendar;<br />import java.util.Timer;<br />import java.util.TimerTask;<br />import android.appwidget.AppWidgetManager;<br />import android.appwidget.AppWidgetProvider;<br />import android.content.ComponentName;<br />import android.content.Context;<br />import android.widget.RemoteViews;<br />public class WidetDemo extends AppWidgetProvider {<br /> /** Called when the activity is first created. */</p><p>@Override<br />public void onUpdate(Context context, AppWidgetManager appWidgetManager,<br />int[] appWidgetIds) {</p><p>Timer timer = new Timer();<br />timer.scheduleAtFixedRate(new MyTime(context,appWidgetManager), 1, 60000);<br />super.onUpdate(context, appWidgetManager, appWidgetIds);<br />}</p><p>private class MyTime extends TimerTask{<br />RemoteViews remoteViews;<br />AppWidgetManager appWidgetManager;<br />ComponentName thisWidget;</p><p>public MyTime(Context context,AppWidgetManager appWidgetManager){<br />this.appWidgetManager = appWidgetManager;<br />remoteViews = new RemoteViews(context.getPackageName(),R.layout.main);</p><p>thisWidget = new ComponentName(context,WidetDemo.class);<br />}<br />public void run() {</p><p>Date date = new Date();<br />Calendar calendar = new GregorianCalendar(2010,06,11);<br />long days = (((calendar.getTimeInMillis()-date.getTime())/1000))/86400;<br />remoteViews.setTextViewText(R.id.wordcup, "距離南非世界盃還有" + days+"天");<br />appWidgetManager.updateAppWidget(thisWidget, remoteViews);</p><p>}</p><p>}</p><p>}
七、修改設定檔AndroidManifest.xml,代碼如下:
<?xml version="1.0" encoding="utf-8"?><br /><manifest xmlns:android="http://schemas.android.com/apk/res/android"<br /> package="com.android.tutor"<br /> android:versionCode="1"<br /> android:versionName="1.0"><br /> <application android:icon="@drawable/icon" android:label="@string/app_name"><br /> <receiver android:name=".WidetDemo"<br /> android:label="@string/app_name"><br /> <intent-filter><br /> <action android:name="android.appwidget.action.APPWIDGET_UPDATE" /><br /> </intent-filter><br /> <meta-data android:name="android.appwidget.provider"<br /> android:resource="@xml/widget_provider"<br /> /><br /> </receiver><br /> </application><br /> <uses-sdk android:minSdkVersion="7" /><br /></manifest>
八、點擊運行(Ctrl+F11),之,運行成功後,我們長時間點擊案頭,會出現如下倆個,依次點擊,就可以看到最上面的:
今天就到這裡了,我困了呵呵,我發現時間好像不對勁,lol~我也不去多想了,大家知道的告訴我下!對日曆這些東西不是太瞭解,謝謝!!