Mahavir,
You should use the debugger to find out what happens in
FBQueryAsyncTask.java on line 50. The next thing on the stack is
Facebook API methods, which eventually crash with a null pointer exception.
A probable cause for this is that you're passing a null pointer to
Facebook APIs from doInBackground. Use the debugger to confirm this and
find out why this happens.
-- Kostya
19.03.2011 14:43, Mahavir Jain пишет:
No, I am not calling from onReceive() method of app-widget.
I will tell you step-by-step what I am doing:
1) There is my configuration Activity of my AppWidget class which
perform the FB authentication and then retrieves the wall post using
FBQueryAsyncTask. It do this successfully.
2) In my updateAppWidget() method, I update the remote views and
assign the following pending intents to "next" button of my app-widget.
Intent intent=new Intent(context,GetPostService.class);
//GetPostService is service class
Bundle b=new Bundle();
b.putInt(MyWidgetProvider.APP_WIDGET_ID, id);
b.putInt(MyWidgetProvider.REQUEST_CODE,
MyWidgetProvider.NEXT_FB_POST);
intent.putExtras(b);
PendingIntent
nextPostService=PendingIntent.getService(context, 0, intent,
PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.next_button, nextPostService);
3) In GetPostService, I am using the same FBQueryAsync class which I
have used in configuration activity (to authenticate and retrieve the
post) and with same parameter. But it throwing exception in my service
class and it running perfectly in my configuration activity.
I may be missing something. Following is my ManifestXML where I have
mentioned service, widget provider and cofiguration activity:
<activity android:name=".FBCredentialsActivity"
android:theme="@style/Theme.Transparent">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />
</intent-filter>
</activity>
<receiver android:name="MyWidgetProvider">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data android:name="android.appwidget.provider"
android:resource="@xml/widget_provider"/>
</receiver>
<service android:name=".GetPostService"></service>
Thanks for giving time.
Regards,
Mahavir
On Sat, Mar 19, 2011 at 4:43 PM, Kostya Vasilyev <[email protected]
<mailto:[email protected]>> wrote:
19.03.2011 13:57, Mahavir Jain пишет:
Is it valid to call AsyncTask from PendingIntent service or
activity?
AsyncTask has nothing to do with pending intents or activities.
It's just a utility class.
Check your logcat more carefully:
ERROR/AndroidRuntime(473): Caused by:
java.lang.NullPointerException
ERROR/AndroidRuntime(473): at
java.net.URLEncoder.encode(URLEncoder.java:53)
ERROR/AndroidRuntime(473): at
com.facebook.android.Util.encodeUrl(Util.java:86)
ERROR/AndroidRuntime(473): at
com.facebook.android.Util.openUrl(Util.java:146)
ERROR/AndroidRuntime(473): at
com.mobisys.android.app_widget.FBQueryAsyncTask.doInBackground(FBQueryAsyncTask.java:50)
Assuming that com.mobisys is your application, look in
FBQueryAsync.java, line 50.
Are you somehow calling Facebook classes with a NULL pointer?
Are you using AsyncTask from a widget's onReceive?
--
Kostya Vasilyev -- http://kmansoft.wordpress.com
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