Okay, so my suspicion was right!
How can I achieve passing the parent activity to it?
Does this involve Intents? Or should the CPAddressbook simply extend
the parent activity?
Thanks for your help so far,
Flo.
On 3 Jan., 02:17, Dmitri Plotnikov <dplotni...@google.com> wrote:
> Actually, no need for a stack trace. You are manually allocating an
> activity. This should never be done. It would be best to all the work
> in the activity allocated by the system. Of course you can delegate
> the work to a helper object like CPAddressbook, but you will need to
> pass the parent activity to it.
>
> Cheers,
> Dmitri
>
> On Saturday, January 2, 2010, Dmitri Plotnikov <dplotni...@google.com> wrote:
> > Could you post the exception stack trace?
>
> > Thank you,
> > Dmitri
>
> > On Saturday, January 2, 2010, Flo <flo.schw...@gmail.com> wrote:
> >> Hey there!
>
> >> I'm currently working on a component that's retrieving contact
> >> information and creating an RDF model (FOAF tbe) from the data
> >> provided. I started off with the HelloAndroid example and tried some
> >> code in there. Everything worked out fine, so I wanted to put
> >> everything in a seperate class which can be accessed via an interface.
>
> >> However, now I'm getting a NullPointer Exception when I want to call a
> >> managedQuery().
> >> So I tried to create a ContentResolver in order to perform a query().
> >> But as soon as I call the getContentResolver() I'm getting a
> >> NullPointer Exception as well.
>
> >> I think this could be a problem concerning the AndroidManifest.xml or
> >> lack of knowledge about how to handle Activities and the likes? I've
> >> been struggling with that for quite some hours now and think that I
> >> won't solve this on my own, so I'd like to get your opinions and
> >> ideas!
>
> >> However, here's my code:
> >> --------------------------------------------------------------------------
> >> package com.example.helloandroid;
>
> >> import it.polimi.elet.contextaddict.microjena.rdf.model.Model;
> >> import it.polimi.elet.contextaddict.microjena.rdf.model.ModelFactory;
> >> import it.polimi.elet.contextaddict.microjena.rdf.model.Resource;
> >> import it.polimi.elet.contextaddict.microjena.vocabulary.RDF;
> >> import android.app.Activity;
> >> import android.database.Cursor;
> >> import android.net.Uri;
> >> import android.os.Bundle;
> >> import android.provider.ContactsContract;
>
> >> public class CPAddressbook extends Activity implements
> >> IBasicContextProvider {
>
> >> Model contextModel;
>
> >> public void onCreate(Bundle savedInstanceState) {
> >> super.onCreate(savedInstanceState);
> >> contextModel = ModelFactory.createDefaultModel();
> >> }
>
> >> @Override
> >> public void detectContext(Model model) {
>
> >> Uri contactsURI = ContactsContract.Data.CONTENT_URI;
>
> >> String[] projection = new String[] {
> >> ContactsContract.Data._ID,
> >> ContactsContract.Data.CONTACT_ID,
> >> ContactsContract.Data.MIMETYPE,
> >> ContactsContract.Data.DATA1,
> >> ContactsContract.Data.DATA2,
> >> ContactsContract.Data.DATA3,
> >> ContactsContract.Data.DATA4,
> >> ContactsContract.Data.DATA5,
> >> ContactsContract.Data.DATA_VERSION
> >> };
> >> String where = ContactsContract.Data.MIMETYPE + " = ?
> >> OR " +
> >> ContactsContract.Data.MIMETYPE + " = ?
> >> OR " +
> >> ContactsContract.Data.MIMETYPE + " = ?
> >> OR " +
> >> ContactsContract.Data.MIMETYPE + " = ?";
>
> >> String[] whereArgs = new String[] {
>
> >> ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE,
>
> >> ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE,
>
> >> ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE,
>
> >> ContactsContr
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