In App Purchase: Diese App-Version ist nicht für die Zahlung über Google Play konf.

base64EncodedPublicKey
		iabHelper = new IabHelper(this, base64EncodedPublicKey);
		iabHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
			    @Override
				public void onIabSetupFinished(IabResult result) {
				      if (!result.isSuccess()) {
				         // Oh noes, there was a problem.
				         Log.d(PURCHASE_TAG, "Problem setting up In-app Billing: " + result);
				      } else if (result.isSuccess()){
				         // Hooray, IAB is fully set up!
				      	Log.d(PURCHASE_TAG, "Setup completed: " + result);
				      	iabHelper.queryInventoryAsync(true, null, queryFinishedListener);
				      }
				   }

				});

	    if (iabHelper.handleActivityResult(requestCode, resultCode, data)) {
	        Log.d("TAG", "onActivityResult handled by IABUtil.");
	        return;
	    }

if(isPremium){
				saveImageToGallery(imageState.image);
			} else if (iabHelper != null) {
				iabHelper.flagEndAsync();
				purchaseItem(SKU_TEST);

	private void purchaseItem(String sku) {
		iabHelper.launchPurchaseFlow(this, sku, 10001,   
				   purchaseFinishedListener);
	}

	IabHelper.QueryInventoryFinishedListener 
	   queryFinishedListener = new IabHelper.QueryInventoryFinishedListener() {
	   public void onQueryInventoryFinished(IabResult result, Inventory inventory)   
	   {
	      if (result.isFailure()) {
	         // handle error
	         return;
	       } else if (result.isSuccess()){
	    	   Log.d("$$$$$$$$$$$$$$$", "" + result);
	       }
	   }
	};
	
	IabHelper.OnIabPurchaseFinishedListener purchaseFinishedListener 
	   = new IabHelper.OnIabPurchaseFinishedListener() {
	   public void onIabPurchaseFinished(IabResult result, Purchase purchase) 
	   {
	      if (result.isFailure()) {
	         Log.d("ERROR_TAG", "Error purchasing: " + result);
	         return;
	      }      
	      else if (purchase.getSku().equals(SKU_TEST)) {
	         // give user access to premium content and update the UI
	    	  isPremium = purchase.getSku().equals(SKU_TEST);        
	      }
	   }

	};
	
	IabHelper.QueryInventoryFinishedListener gotInventoryListener 
	   = new IabHelper.QueryInventoryFinishedListener() {
	   public void onQueryInventoryFinished(IabResult result,
	      Inventory inventory) {

	      if (result.isFailure()) {
	        // handle error here
	      }
	      else {
	        // does the user have the premium upgrade?
	    	Log.d("$$$$$$$$$$$$$$$", "Is premium: " + isPremium);
	        // update UI accordingly
	      }
	   }
	};

Purchase premiumPurchase = inventory.getPurchase(SKU_PREMIUM);
mIsPremium = (premiumPurchase != null && verifyDeveloperPayload(premiumPurchase));