Android App Injections on Android

I am in the process of implementing an in-app for my eclipse app but Im stuck at this part where you need to call getSkuDetails

Bundle skuDetails = mService.getSkuDetails(3, getPackageName(), "inapp", querySkus);

      

        
        
        
      

    

Android implementation guide -> http://developer.android.com/google/play/billing/billing_integrate.html

Tells me

"Warning: Do not call the getSkuDetails method on the main thread. Calling this method triggers a network request that might block your main thread. Instead, create a separate thread and call the getSkuDetails method from within that thread."

My only problem is that I don't know how to call another thread inside my main activity or how to do this as I have never done this before, thanks to someone who can help me get stuck on this last week

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    connection = new ServiceConnection() {

           @Override
           public void onServiceDisconnected(ComponentName name) {

               mService = null;

           }

           @Override
           public void onServiceConnected(ComponentName name, IBinder service) {

               mService = IInAppBillingService.Stub.asInterface(service);

           }
        };


        Intent serviceIntent = new Intent("com.android.vending.billing.InAppBillingService.BIND");

        serviceIntent.setPackage("com.android.vending");
        bindService(serviceIntent, connection, Context.BIND_AUTO_CREATE);


}

public void levelTwoButtonClicked(){

    Assets.click.play(1.00f);

    new LoadIconTask().execute();

}

class LoadIconTask extends AsyncTask<Integer, Integer, Long> {

    @Override
    protected Long doInBackground(Integer... params) {

        ArrayList<String> skuList = new ArrayList<String>();
        skuList.add(inappid);
        Bundle querySkus = new Bundle();
        querySkus.putStringArrayList("ITEM_ID_LIST", skuList);
        Bundle skuDetails;      

    try{

            skuDetails = mService.getSkuDetails(3, getPackageName(), "inapp", querySkus);

            int response = skuDetails.getInt("RESPONSE_CODE");
            if(response == 0){

                ArrayList<String> responseList = skuDetails.getStringArrayList("DETAILS_LIST");

                for(String thisResponse : responseList){

                    JSONObject object = new JSONObject(thisResponse);
                    String sku = object.getString("productID");
                    String price = object.getString("price");

                    if(sku.equals(inappid)){

                        System.out.println("price" + price);
                        Bundle buyIntentBundle = mService.getBuyIntent(3, getPackageName(), sku, "inapp", "bGoa+V7g/yqDXvKRqq+JTFn4uQZbPiQJo4pf9RzJ");
                        PendingIntent pendingIntent = buyIntentBundle.getParcelable("BUY_INTENT");
                        startIntentSenderForResult(pendingIntent.getIntentSender(), 1001, new Intent(), Integer.valueOf(0), Integer.valueOf(0), Integer.valueOf(0));

                    }

                }

            }
        } catch (RemoteException e){
            e.printStackTrace();
        } catch (JSONException e){
            e.printStackTrace();
        } catch (SendIntentException e){
            e.printStackTrace();
        }


        return null;
    }


}

      

        
        
        
      

    

Every time I run and click the Buy Level Two button, I get this error

06-07 20:16:26.102: E/AndroidRuntime(19783): FATAL EXCEPTION: AsyncTask #2
06-07 20:16:26.102: E/AndroidRuntime(19783): java.lang.RuntimeException: An error occured while executing doInBackground()
06-07 20:16:26.102: E/AndroidRuntime(19783):    at android.os.AsyncTask$3.done(AsyncTask.java:278)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.lang.Thread.run(Thread.java:856)
06-07 20:16:26.102: E/AndroidRuntime(19783): Caused by: java.lang.NullPointerException
06-07 20:16:26.102: E/AndroidRuntime(19783):    at com.izzymachado.framework.implementation.AndroidGame$LoadIconTask.doInBackground(AndroidGame.java:198)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at com.izzymachado.framework.implementation.AndroidGame$LoadIconTask.doInBackground(AndroidGame.java:1)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at android.os.AsyncTask$2.call(AsyncTask.java:264)
06-07 20:16:26.102: E/AndroidRuntime(19783):    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)

      

        
        
        
      

    

line 198 is skuDetails = mService.getSkuDetails (3, getPackageName (), "inapp", querySkus);