关于android：In-App-Billing：无法设置IAB Helper异常

           // compute your public key and store it in base64EncodedPublicKey
           mHelper = new IabHelper(this, base64EncodedPublicKey);

        // enable debug logging (for a production application, you should set this to false).
            mHelper.enableDebugLogging(true);

           //perform service binding to Google Bill ser and return ny errors with IabResult object and listener

            mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
                public void onIabSetupFinished(IabResult result) {
                    Log.d(TAG,"Setup finished.");

                    if (!result.isSuccess()) {
                        // Oh noes, there was a problem.
                        alert("Problem setting up in-app billing:" + result);
                        return;
                    }

                    // Have we been disposed of in the meantime? If so, quit.
                    if (mHelper == null) return;

                    // IAB is fully set up. Now, let’s get an inventory of stuff we own.
                    Log.d(TAG,"Setup successful. Querying inventory.");
                    //mHelper.queryInventoryAsync(mGotInventoryListener);
                }
            });

           //ILLEGALSTAEEXCEPTION THROWN HERE

           mHelper.launchPurchaseFlow(this, testProduct, RC_REQUEST,  
                   new IabHelper.OnIabPurchaseFinishedListener() {
                       public void onIabPurchaseFinished(IabResult result, Purchase purchase)
                       {
                          if (result.isFailure()) {
                             Log.d(TAG,"Error purchasing:" + result);
                             return;
                          }
                          else if (purchase.getSku().equals(testProduct)) {
                             // give user access to premium content and update the UI
                              //set the purchaesd booean to true

                            //when purcajsed add this code
                                editor.putBoolean("purchased", true);
                                editor.commit();
                                Toast.makeText(getApplicationContext(),"ADD FREE VERSION PURCAHSED!!!" +
                                       " Details OrderID:"+purchase.getOrderId() +" Payload ID:"+purchase.mDeveloperPayload, Toast.LENGTH_LONG).show();
                                Log.d("CONNECT TO GOOGLE BILL","ITEM PURCAHSED! :"+purchased);
                          }
                       }
                    },"diveAppPurchase");

    }//onCreate
@Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            Log.d(TAG,"onActivityResult(" + requestCode +"," + resultCode +"," + data);
            if (mHelper == null) return;

            // Pass on the activity result to the helper for handling
            if (!mHelper.handleActivityResult(requestCode, resultCode, data)) {
                // not handled, so handle it ourselves (here’s where you’d
                // perform any handling of activity results not related to in-app
                // billing…
                super.onActivityResult(requestCode, resultCode, data);
            }
            else {
                Log.d(TAG,"onActivityResult handled by IABUtil.");
            }
        }