PayPal MPL library

pp.Initialize("APP-12345678901234567", False, "Paypal")

package anywheresoftware.b4a.paypal;

import java.lang.ref.WeakReference;
import java.math.BigDecimal;
import java.util.ArrayList;

import com.paypal.android.MEP.CheckoutButton;
import com.paypal.android.MEP.PayPal;
import com.paypal.android.MEP.PayPalActivity;
import com.paypal.android.MEP.PayPalPayment;

import android.app.Activity;
import android.content.Intent;
import android.view.View;
import anywheresoftware.b4a.BA;
import anywheresoftware.b4a.IOnActivityResult;
import anywheresoftware.b4a.BA.ActivityObject;
import anywheresoftware.b4a.BA.DependsOn;
import anywheresoftware.b4a.BA.Events;
import anywheresoftware.b4a.BA.Permissions;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.BA.Version;
import anywheresoftware.b4a.keywords.Common;
import anywheresoftware.b4a.objects.ViewWrapper;

@Version(1.0f)
@Permissions(values={"android.permission.INTERNET", "android.permission.READ_PHONE_STATE", "android.permission.ACCESS_WIFI_STATE"})
@DependsOn(values={"PayPal_MPL"})
@ShortName("PayPal")
@ActivityObject
@Events(values={"Ready (Success As Boolean)", "Result (Success As Boolean, Extra As String)", "Click"})
public class PayPalWrapper {
   public static final int PAYMENT_TYPE_GOODS = 0;
   public static final int PAYMENT_TYPE_SERVICE = 1;
   public static final int PAYMENT_TYPE_PERSONAL = 2;
   public static final int PAYMENT_TYPE_NONE = 3;
   
   private static IOnActivityResult ion;
   private String eventName;
   private ArrayList<CheckoutButton> buttons = new ArrayList<CheckoutButton>();
   /**
    * Initializes the PayPal object. The Ready event will be raised when the service is ready.
    *AppId - PayPal app id.
    *Sandbox - Whether to run in sandbox mode.
    *EventName - Sets the subs that will handle the events.
    */
   public void Initialize(final BA ba,final String AppId,final boolean Sandbox,final String EventName) {
     eventName = EventName.toLowerCase(BA.cul);
     Runnable r = new Runnable() {

       @Override
       public void run() {
         try {
           if (PayPal.getInstance() == null) {
             PayPal pp;
             pp = PayPal.initWithAppID(ba.context, AppId, Sandbox ? PayPal.ENV_SANDBOX : PayPal.ENV_LIVE);
             pp.setLanguage("en_US");
           }
           ba.raiseEventFromDifferentThread(PayPalWrapper.this, null, 0, eventName + "_ready", false,
               new Object[] {PayPal.getInstance().isLibraryInitialized()});
         } catch (Exception e) {
           BA.printException(e, true);
           ba.raiseEventFromDifferentThread(PayPalWrapper.this, null, 0, eventName + "_ready", false,
               new Object[] {false});
         }

       }

     };
     ba.submitRunnable(r, null, 0);

   }
   /**
    * Gets the PayPal button.
    *Donate - Whether to show a Donate button or Pay button.
    */
   public View GetPayPalButton(final BA ba, boolean Donate) {
     final CheckoutButton v = PayPal.getInstance().getCheckoutButton(ba.activity, PayPal.BUTTON_278x43, Donate ?
         CheckoutButton.TEXT_DONATE : CheckoutButton.TEXT_PAY);
     v.setOnClickListener(new View.OnClickListener() {

       @Override
       public void onClick(View arg0) {
         ba.raiseEvent(PayPalWrapper.this, eventName + "_click");
       }

     });
     buttons.add(v);
     return v;
   }
   /**
    * Makes a payment request.
    *The Result event will be raised after the payment is processed.
    *Currency - 3 characters currency code.
    *Total - Payment amount.
    *Recipient - Recipient email address.
    *MerchantName - Merchant name.
    *PaymentType - One of the PAYMENT_TYPE constants.
    */
   public void RequestPayment(BA ba, String Currency, String Total, String Recipient, String MerchantName, int PaymentType) {
     for (CheckoutButton cb : buttons) {
       cb.updateButton();
     }
     PayPalPayment pay = new PayPalPayment();
     pay.setSubtotal(new BigDecimal(Total));
     pay.setCurrencyType(Currency);
     pay.setRecipient(Recipient);
     pay.setPaymentType(PaymentType);
     pay.setMerchantName(MerchantName);
     final BA processBA = ba.processBA;
     ion = new IOnActivityResult() {

       @Override
       public void ResultArrived(int resultCode, Intent intent) {
         String extra = "";
         boolean success = false;
         switch (resultCode) {
         case Activity.RESULT_OK:
           success = true;
           extra = intent.getStringExtra(PayPalActivity.EXTRA_PAY_KEY);
           break;

         case Activity.RESULT_CANCELED:
           extra = "canceled";
           break;
         case PayPalActivity.RESULT_FAILURE:
           String errorID =
             intent.getStringExtra(PayPalActivity.EXTRA_ERROR_ID);
           String errorMessage =
             intent.getStringExtra(PayPalActivity.EXTRA_ERROR_MESSAGE);
           extra = errorID + ": " + errorMessage;
         }
         processBA.raiseEvent(PayPalWrapper.this, eventName + "_result", success, extra);
       }

     };
     Intent ppIntent = PayPal.getInstance().checkout(pay, ba.context);
     ba.startActivityForResult(ion, ppIntent);
   }
}