AppWidget的范例

首先在res文件夹下新建一目录，命名为xml。然后在这个目录下新建一个xml文件（如下图）：

example_appwidget.xml的内容如下：

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

然后创建一个类：ExampleAppWidget。ExampleAppWidget.java如下：

package com.kevin.appwidget.test1;

import android.app.PendingIntent;

import android.appwidget.AppWidgetManager;

import android.appwidget.AppWidgetProvider;

import android.content.Context;

import android.content.Intent;

import android.util.Log;

import android.widget.RemoteViews;

public class ExampleAppWidget extends AppWidgetProvider {

    @Override

    public void onUpdate(Context context, AppWidgetManager appWidgetManager,

            int[] appWidgetIds) {

        super.onUpdate(context, appWidgetManager, appWidgetIds);

        Log.v("tag", "------------------------>onUpdate()");

        Intent intent = new Intent(context, AppWidget01Activity.class);

        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,

                intent, 0);

        RemoteViews view = new RemoteViews(context.getPackageName(),

                R.layout.appwidget_layout);

        view.setOnClickPendingIntent(R.id.btnStartActivity, pendingIntent);

        appWidgetManager.updateAppWidget(appWidgetIds, view);

    }

    @Override

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

        super.onDeleted(context, appWidgetIds);

        Log.v("tag", "------------------------>onDeleted()");

    }

    @Override

    public void onEnabled(Context context) {

        super.onEnabled(context);

        Log.v("tag", "------------------------>onEnabled()");

    }

    @Override

    public void onDisabled(Context context) {

        super.onDisabled(context);

        Log.v("tag", "------------------------>onDisabled()");

    }

}

最后配置Manifest.xml文件。如下：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.kevin.appwidget.test1"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="8" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".AppWidget01Activity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />

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

        <receiver android:name=".ExampleAppWidget" >
            <intent-filter >
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            </intent-filter>

            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/example_appwidget" />
        </receiver>
    </application>

</manifest>

这样就可以看到appwidget的效果了。