我必须开发一个购物车应用程序并集成Paypal. 如何设置Paypal付款发票数据？
如何在 Paypal 付款发票中添加产品名称、数量、价格？.
这是我添加到购物车页面的产品代码：
public class SingleMenuItem extends Activity {
static final String KEY_TITLE = "Name";
static final String KEY_COST = "Price";
static final String KEY_TOTAL = "total";
static final String KEY_QTY = "qty";
static final String KEY_THUMB_URL = "Image";
private EditText edit_qty_code;
private TextView txt_total;
private TextView text_cost_code;
private double itemamount = 0;
private double itemquantity = 0;
String mTitle, mQty, mCost, mTotal;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.single);
Intent in = getIntent();
String title = in.getStringExtra(KEY_TITLE);
String thumb_url = in.getStringExtra(KEY_THUMB_URL);
String cost = in.getStringExtra(KEY_COST);
String total = in.getStringExtra(KEY_TOTAL);
ImageLoader imageLoader = new ImageLoader(getApplicationContext());
ImageView imgv = (ImageView) findViewById(R.id.single_thumb);
final TextView txttitle = (TextView) findViewById(R.id.single_title);
TextView txtheader = (TextView) findViewById(R.id.actionbar);
text_cost_code = (TextView) findViewById(R.id.single_cost);
edit_qty_code = (EditText) findViewById(R.id.single_qty);
edit_qty_code.setText("1");
txt_total = (TextView) findViewById(R.id.single_total);
txttitle.setText(title);
txtheader.setText(title);
text_cost_code.setText(cost);
txt_total.setText(total);
imageLoader.DisplayImage(thumb_url, imgv);
itemamount = Double.parseDouble(text_cost_code.getText().toString());
txt_total.setText(Double.toString(itemamount));
edit_qty_code.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
if (!edit_qty_code.getText().toString().equals("")
|| !edit_qty_code.getText().toString().equals("")) {
itemquantity = Double.parseDouble(edit_qty_code.getText()
.toString());
itemamount = Double.parseDouble(text_cost_code.getText()
.toString());
txt_total.setText(Double
.toString(itemquantity * itemamount));
} else {
txt_total.setText("0.00");
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
public void afterTextChanged(Editable s) {
}
});
ImageButton mImgAddCart = (ImageButton) findViewById(R.id.img_add);
mImgAddCart.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
mTitle = txttitle.getText().toString();
mCost = text_cost_code.getText().toString();
mCost = mCost.replace("From ", "");
mTotal = txt_total.getText().toString();
mTotal = mTotal.replace("From ", "");
mQty = edit_qty_code.getText().toString();
if (Constants.mItem_Detail.size() <= 0) {
HashMap<String, String> mTempObj = new HashMap<String, String>();
mTempObj.put(KEY_TITLE, mTitle);
mTempObj.put(KEY_QTY, mQty);
mTempObj.put(KEY_COST, mCost);
mTempObj.put(KEY_TOTAL, mTotal);
Constants.mItem_Detail.add(mTempObj);
} else {
for (int i = 0; i < Constants.mItem_Detail.size(); i++) {
if (Constants.mItem_Detail.get(i).get(KEY_TITLE)
.equals(mTitle)) {
Constants.mItem_Detail.remove(i);
break;
} else {
}
}
HashMap<String, String> mTempObj = new HashMap<String, String>();
mTempObj.put(KEY_TITLE, mTitle);
mTempObj.put(KEY_QTY, mQty);
mTempObj.put(KEY_COST, mCost);
mTempObj.put(KEY_TOTAL, mTotal);
Constants.mItem_Detail.add(mTempObj);
}
AlertDialog.Builder alertdialog = new AlertDialog.Builder(
SingleMenuItem.this);
alertdialog.setTitle(getResources()
.getString(R.string.app_name));
alertdialog.setMessage("Add in ViewCart");
alertdialog.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
//finish();
return;
}
});
alertdialog.show();
}
});
ImageButton mImgViewCart = (ImageButton) findViewById(R.id.img_view);
mImgViewCart.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent mInViewCart = new Intent(SingleMenuItem.this,
ViewCartActivity.class);
startActivity(mInViewCart);
}
});
这是产品代码添加到购物车：
ListView mLstView1 = (ListView) findViewById(R.id.listView1);
TextView mTxtViewGrandTotal = (TextView) findViewById(R.id.mTxtViewGrandTotalValue);
Button mBtnSubmit = (Button) findViewById(R.id.mBtnSubmit);
ViewCartAdapter mViewCartAdpt = new ViewCartAdapter(
ViewCartActivity.this);
mLstView1.setAdapter(mViewCartAdpt);
if (Constants.mItem_Detail.size() > 0) {
Double mGTotal = Double.parseDouble(Constants.mItem_Detail.get(0)
.get(SingleMenuItem.KEY_TOTAL));
for (int i = 1; i < Constants.mItem_Detail.size(); i++) {
mGTotal = mGTotal
+ Double.parseDouble(Constants.mItem_Detail.get(i).get(
SingleMenuItem.KEY_TOTAL));
}
mGrandTotal = String.valueOf(mGTotal);
mTxtViewGrandTotal.setText("$" + mGrandTotal);
}
mBtnSubmit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent i = new Intent(getApplicationContext(), CustomerLogin.class);
startActivity(i);
}
});
这是我的支付宝整合活动：
public class PayPalIntegrationActivity extends Activity implements OnClickListener {
private PayPal mPayPal;
private CheckoutButton launchPayPalButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_pay_pal_integration);
mPayPal=PayPal.initWithAppID(this,Constants.PAYPAL_APP_ID,PayPal.ENV_SANDBOX);
initUI();
}
private void initUI() {
launchPayPalButton = mPayPal.getCheckoutButton(this,
PayPal.BUTTON_278x43, CheckoutButton.TEXT_PAY);
RelativeLayout.LayoutParams params = new
RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.CENTER_IN_PARENT);
params.bottomMargin = 10;
launchPayPalButton.setLayoutParams(params);
launchPayPalButton.setOnClickListener(this);
((RelativeLayout)findViewById(R.id.main_layout)).addView(launchPayPalButton);
}
@Override
public void onClick(View v) {
payWithPaypal();
}
private PayPalPayment payWithPaypal() {
PayPalPayment newPayment = new PayPalPayment();
BigDecimal bigDecimal=new BigDecimal(10);
newPayment.setSubtotal(bigDecimal);
newPayment.setCurrencyType(Currency.getInstance(Locale.US));
newPayment.setRecipient("krishnaveni.veeman@mercuryminds.com");
newPayment.setMerchantName("My Merchant");
newPayment.setSubtotal(new BigDecimal(mTotal));
newPayment.setPaymentType(PayPal.PAYMENT_TYPE_GOODS);
Intent paypalIntent = PayPal.getInstance().checkout(newPayment, this);
this.startActivityForResult(paypalIntent, 1);
PayPalInvoiceData invoice = new PayPalInvoiceData();
return newPayment;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch(resultCode) {
case Activity.RESULT_OK:
String payKey =
data.getStringExtra(PayPalActivity.EXTRA_PAY_KEY);
Toast.makeText(this,"Payment Successful",Toast.LENGTH_LONG).show();
break;
case Activity.RESULT_CANCELED:
Toast.makeText(this,"Payment Cancel",Toast.LENGTH_LONG).show();
break;
case PayPalActivity.RESULT_FAILURE:
Toast.makeText(this,"Payment Failed",Toast.LENGTH_LONG).show();
String errorID =
data.getStringExtra(PayPalActivity.EXTRA_ERROR_ID);
String errorMessage =
data.getStringExtra(PayPalActivity.EXTRA_ERROR_MESSAGE);
break;
}
在这里，我如何将产品名称添加到 paypalpayment 发票。请帮助我。