App isnt installed widget android -


trying test widget.the widget appear in widget tab when click on it, app not installed toast message in emulator don't understand how widget works , 1 more sub-question : followed http://kasperholtze.com/android/how-to-make-a-simple-android-widget/ tutorial -> have source code , perhaps need run once activity , how code compiled widget anyway?

below manifest. 

    <receiver         android:name=".timewidget"         android:label="time" >         <intent-filter>             <action android:name="android.intent.action.airplane_mode"/>             <action android:name="android.appwidget.action.appwidget_update" />         </intent-filter>          <meta-data             android:name="android.appwidget.provider"             android:resource="@xml/time_widget_provider" />     </receiver>      <activity         android:name="com.example.ass3.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=".configurationactivity" >         <intent-filter>             <action android:name="android.appwidget.action.appwidget_configure" />         </intent-filter>     </activity>      <activity android:name="inccallhistory" android:label="incoming call history"></activity>     <activity android:name="timewidget" android:label="time widget"></activity> </application>


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