Android应用实例之（二）----->Android Widget开发案例（worldcup）

今天我们要写一下Android Widget的开发，由于时间关系，同志们就模仿吧！首先看一下效果图:





下面是Demo的详细步骤:



一、新建一个Android工程命名为:WidgetDemo.



二、准备素材，一个是Widget的图标，一个是Widget的背景。存放目录如下图:







三、修改string.xml文件如下:

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<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World, WidgetDemo!</string>
<string name="app_name">WorldCup</string>
</resources>



四、建立Widget内容提供者文件，我们在res下建立xml文件夹，并且新建一个example_appwidget_info.xml代码入下:

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:minWidth="294dp"
    android:minHeight="72dp"
    android:updatePeriodMillis="86400000"
    android:initialLayout="@layout/example_appwidget"
    >
</appwidget-provider>

五、修改main.xml布局，代码如下:



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<?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"

/>

</LinearLayout>



六、修改WidgetDemo.java代码如下:

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import android.app.PendingIntent;

import android.appwidget.AppWidgetManager;

import android.appwidget.AppWidgetProvider;

import android.content.Context;

import android.content.Intent;

import android.widget.RemoteViews;

public class appWidgetProvider extends AppWidgetProvider{
@Override

public void onDeleted(Context context, int[] appWidgetIds) {

// TODO Auto-generated method stub

super.onDeleted(context, appWidgetIds);

}

@Override

public void onDisabled(Context context) {

// TODO Auto-generated method stub

super.onDisabled(context);

}

@Override

public void onEnabled(Context context) {

// TODO Auto-generated method stub

super.onEnabled(context);

}

@Override

public void onReceive(Context context, Intent intent) {

// TODO Auto-generated method stub

super.onReceive(context, intent);

}

@Override

public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {

for(int i = 0;i < appWidgetIds.length;i++){

System.out.println(appWidgetIds[i]);

Intent intent = new Intent(context,TargetActivity.class);

PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);

RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.example_appwidget);

remoteViews.setOnClickPendingIntent(R.id.widgetButtonId, pendingIntent);

appWidgetManager.updateAppWidget(appWidgetIds[i], remoteViews);



}



super.onUpdate(context, appWidgetManager, appWidgetIds);

}

}



七、修改配置文件AndroidManifest.xml，代码如下:

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

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.peter.test"

android:versionCode="1"

android:versionName="1.0">

<uses-sdk android:minSdkVersion="10" />

<application android:icon="@drawable/worldcup" android:label="@string/app_name">

<activity android:name=".MainActivity"

android:label="@string/app_name">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

<activity android:name=".TargetActivity"></activity>

<receiver android:name=".appWidgetProvider">

<intent-filter >

<action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>

</intent-filter>

<meta-data android:name="android.appwidget.provider"

android:resource="@xml/example_appwidget_info"

/>

</receiver>

</application>

</manifest>



八、点击运行(Ctrl+F11),之，运行成功后，我们长时间点击桌面，会出现如下，依次点击，就可以看到最上面的效果图: