getProductData throws nullPointerException

[preeti.s.patil]

Hi,


I am trying to implement IAP api's in my existing MIDlet. For this,I setup my Nokia SDK1.1 emulator.
But, when i run it, I am unable to get the instance of IAPClientPaymentManager.

My code is like this,
manager = IAPClientPaymentManager.getIAPClientPaymentManager();



Please help...

[skalogir]

Hi preeti,

This looks correct. What is the error that you get?

Would you still have trouble, if you were to use this sample code:

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import com.nokia.mid.payment.IAPClientPaymentException;
import com.nokia.mid.payment.IAPClientPaymentListener;
import com.nokia.mid.payment.IAPClientPaymentManager;
import com.nokia.mid.payment.IAPClientProductData;
import com.nokia.mid.payment.IAPClientUserAndDeviceData;

public class IAPtest 
	extends MIDlet 
	implements IAPClientPaymentListener, CommandListener {
	
	Form mainForm;
	Display display;
	Command retrieveCommand = new Command("Info", Command.OK, 0);
	Command exitCommand = new Command("Exit", Command.EXIT, 0);
	StringItem info = new StringItem("Product Data", ""); //Displays either Product Data or Error messages
	
	protected void startApp() throws MIDletStateChangeException {
		//The main Screen's components
		display = Display.getDisplay(this);
		mainForm = new Form("In App Purchase");
		mainForm.addCommand(exitCommand);
		mainForm.addCommand(retrieveCommand);
		mainForm.setCommandListener(this);
		mainForm.append(info);
		display.setCurrent(mainForm);
	}
	
	//Call back method that is asynchronously called after invoking the getProductData method
	public void productDataReceived(int status, IAPClientProductData pd) {
	    if (status == IAPClientPaymentListener.OK) {
	    	
	    	String title = pd.getTitle();
	        String price = pd.getPrice();
	        String sdesc = pd.getShortDescription();
	        
	        String output = "";
	        output = "Title:"+title+"\n";
	        output = output + "Price:"+price+"\n";
	        output = output + "Short Description:" + sdesc + "\n";
	        
	        info.setText(output);
	    }	
	    else {
	    	mainForm.append("Product data retrieval failed with code:" + status);
	    }
	}

	public void commandAction(Command c, Displayable d) {
		if(c == retrieveCommand) {
			
			try {
			    IAPClientPaymentManager manager = IAPClientPaymentManager.getIAPClientPaymentManager();
			    IAPClientPaymentManager.setIAPClientPaymentListener(this);
			    int status = manager.getProductData("681803"); //BattleTank's Product ID
			    if (status != IAPClientPaymentManager.SUCCESS) {
			    	info.setText("Do not expect a callback \n");
			    }
			} 
			catch (IAPClientPaymentException e) {
				info.setText("IAPClientPaymentException:" + e.getMessage() + "\n");
			}
			catch(Exception e) {
				info.setText("Exception:" + e.getMessage() + "\n");
			}
		}
		
		if(c == exitCommand) {
			notifyDestroyed();
		}
		
	}
	
	public void purchaseCompleted(int arg0, String arg1) {
		//To do
	}
	
	public void userAndDeviceDataReceived(int arg0,IAPClientUserAndDeviceData arg1) {
		//To do
	}
	
	public void productDataListReceived(int arg0, IAPClientProductData[] arg1) {
		//To do
	}
	
	public void restorableProductsReceived(int arg0, IAPClientProductData[] arg1) {
		//To do
	}
	
	public void restorationCompleted(int arg0, String arg1) {
		//To do
	}
	
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		//To do
	}
	protected void pauseApp() {
		//To do
	}	
}

and you ensured that you created your In-App resource files according to this guide ?