Android(安卓)AppWidget组件

res/xml/example_appwidget_info.xml 定义了AppWidget必要属性

<?xml version="1.0" encoding="utf-8"?><appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"  android:minWidth="160dp"  android:minHeight="72dp"  android:updatePeriodMillis="86400000"  android:initialLayout="@layout/appwidget_provider_layout"></appwidget-provider>

res/xml/appwidget_provider_layout.xml AppWidget的控件布局文件

<?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:text="WidgetTextView" android:textColor="@android:color/black"android:id="@+id/myWidgetTextView"android:layout_width="wrap_content" android:layout_height="wrap_content"/></LinearLayout>

ExampleAppWidgetProvider.java

package com.zeph.android.widget;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 ExampleAppWidgetProvider extends AppWidgetProvider {@Overridepublic void onDeleted(Context context, int[] appWidgetIds) {super.onDeleted(context, appWidgetIds);}@Overridepublic void onDisabled(Context context) {super.onDisabled(context);}@Overridepublic void onEnabled(Context context) {super.onEnabled(context);}@Overridepublic void onReceive(Context context, Intent intent) {super.onReceive(context, intent);}@Overridepublic void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {final int N = appWidgetIds.length;//循环的更新所有与这个Provider有关的AppWidgetfor (int i = 0; i < N; i++) {int appWidgetId = appWidgetIds[i];// 设置Widget被点击之后，启动的ActivityIntent intent = new Intent(context, WidgetActivity.class);PendingIntent pendingIntent = PendingIntent.getActivity(context, 0,intent, 0);RemoteViews views = new RemoteViews(context.getPackageName(),R.layout.appwidget_provider_layout);views.setOnClickPendingIntent(R.id.myWidgetTextView, pendingIntent);appWidgetManager.updateAppWidget(appWidgetId, views);}}}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.zeph.android.widget"      android:versionCode="1"      android:versionName="1.0">    <uses-sdk android:minSdkVersion="4" />    <application android:icon="@drawable/icon" android:label="@string/app_name">        <activity android:label="@string/app_name" android:name="WidgetActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <receiver android:name="ExampleAppWidgetProvider">            <intent-filter>                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"></action>            </intent-filter>            <meta-data android:name="android.appwidget.provider"             android:resource="@xml/example_appwidget_info">            </meta-data>        </receiver>    </application></manifest>

AppWidgetProvider继承自BroadcastReceiver

所以使用receiver注册AppWidgetProvider

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