AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest package="com.erenutku.simplewidgetexample"
          xmlns:android="http://schemas.android.com/apk/res/android">

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

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

</manifest>