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 { @Override public void onDeleted(Context context, int[] appWidgetIds) { super.onDeleted(context, appWidgetIds); } @Override public void onDisabled(Context context) { super.onDisabled(context); } @Override public void onEnabled(Context context) { super.onEnabled(context); } @Override public void onReceive(Context context, Intent intent) { super.onReceive(context, intent); } @Override public 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AppWidget for (int i = 0; i < N; i++) { int appWidgetId = appWidgetIds[i]; // 设置Widget被点击之后，启动的Activity Intent 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