PayPal MPL Integration into an Art Store

MPL_1.java

//Full source code is available at https://github.com/saranyan/PayPal-Code-Examples

//---------------------------------------------------------------------
//Step 1 - Initialize. 
//Do this before anything else.

 public void initLibrary() {
    	PayPal pp = PayPal.getInstance();
    	if (pp == null) {
    		// This is the main initialization call that takes in your Context,
    		// the Application ID, and the server you would like to connect to.
			pp = PayPal.initWithAppID(this, "APP-80W284485P519543T",
					PayPal.ENV_SANDBOX);

			// -- These are required settings.
			pp.setLanguage("en_US"); // Sets the language for the library.
			// --

			// -- These are a few of the optional settings.
			// Sets the fees payer. If there are fees for the transaction, this
			// person will pay for them. Possible values are FEEPAYER_SENDER,
			// FEEPAYER_PRIMARYRECEIVER, FEEPAYER_EACHRECEIVER, and
			// FEEPAYER_SECONDARYONLY.
			pp.setFeesPayer(PayPal.FEEPAYER_EACHRECEIVER);
			// Set to true if the transaction will require shipping.
			pp.setShippingEnabled(true);
			// Dynamic Amount Calculation allows you to set tax and shipping
			// amounts based on the user's shipping address. Shipping must be
			// enabled for Dynamic Amount Calculation. This also requires you to
			// create a class that implements PaymentAdjuster and Serializable.
			pp.setDynamicAmountCalculationEnabled(false);
			// --
			_paypalLibraryInit = true;
			
			//if dialog is running, close it
			if (_progressDialog.isShowing()) {
        		_progressDialog.dismiss();
        		_progressDialogRunning = false;
        	}
    	}
    }

//---------------------------------------------------------------------
//Step 2 -
//Show a PayPal button.
//Note that the removePayPalButton is called. This is to ensure that there is no exception when 
//the parent view is called more than once
//This is important to do or else your onClick will not get registered after the first time.

 public void showPayPalButton() {
    	
    	removePayPalButton();
		// Back in the UI thread -- show the "Pay with PayPal" button
		// Generate the PayPal Checkout button and save it for later use
		PayPal pp = PayPal.getInstance();
		//get the checkoutbutton
    	launchPayPalButton = pp.getCheckoutButton(Android_PP_Test1Activity.this, PayPal.BUTTON_194x37, CheckoutButton.TEXT_PAY);
    	//add it to layout
    	RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    	//position this at the bottom
    	params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 
    	//some margins for visual goodness
    	params.bottomMargin = 5;
    	params.leftMargin= 50;
    	
    	launchPayPalButton.setLayoutParams(params); 
   		launchPayPalButton.setId(PAYPAL_BUTTON_ID);
    	launchPayPalButton.setOnClickListener(Android_PP_Test1Activity.this);
    	
    	((RelativeLayout)findViewById(R.id.RelativeLayout01)).addView(launchPayPalButton);
    }
    
    
    /* this method removes the PayPal button from the view
	 */
	private void removePayPalButton() {
		// Avoid an exception for setting a parent more than once
		if (launchPayPalButton != null) {
			((RelativeLayout) findViewById(R.id.RelativeLayout01))
					.removeView(launchPayPalButton);
		}
	}

//---------------------------------------------------------------------
//Step 3-
//Handling the return from MPL

// PayPal Activity Results. This handles all the responses from the PayPal
 	// Payments Library
 	@Override
 	public void onActivityResult(int requestCode, int resultCode, Intent intent) {
 		AlertDialog alertDialog = new AlertDialog.Builder(this).create();
 		if (requestCode == REQUEST_PAYPAL_CHECKOUT) {
 			mPurchase[_value] = true;
 			
 			alertDialog.setTitle("Success");
			alertDialog.setMessage("This item will be shipped to you in one week!");
			alertDialog.show();
			
 		} else {
 			super.onActivityResult(requestCode, resultCode, intent);
 		}

 	}

//---------------------------------------------------------------------

//Bonus Code - Display an Image Gallery
//Gallery code

    public class ImageAdapter extends BaseAdapter {
        int mGalleryItemBackground;
        private Context mContext;

        private Integer[] mImageIds = {
                R.drawable.picasso1,
                R.drawable.picasso2,
                R.drawable.picasso3       
        };

        public ImageAdapter(Context c) {
            mContext = c;
            TypedArray attr = mContext.obtainStyledAttributes(R.styleable.Android_PP_Test1);
            mGalleryItemBackground = attr.getResourceId(
                    R.styleable.Android_PP_Test1_android_galleryItemBackground, 0);
            attr.recycle();
        }

        public int getCount() {
            return mImageIds.length;
        }

        public Object getItem(int position) {
            return position;
        }

        public long getItemId(int position) {
            return position;
        }

        public View getView(int position, View convertView, ViewGroup parent) {
            ImageView imageView = new ImageView(mContext);

            imageView.setImageResource(mImageIds[position]);
            imageView.setLayoutParams(new Gallery.LayoutParams(150, 100));
            imageView.setScaleType(ImageView.ScaleType.FIT_XY);
            imageView.setBackgroundResource(mGalleryItemBackground);

            return imageView;
        }
    }