将PayPal Checkout集成到Android应用中

如何解决将PayPal Checkout集成到Android应用中

我正在使用load_profile_data提供的REST APIs将Paypal结帐功能集成到Android应用中，并且我的国家是印度，因此我关注PayPal的this guide。
我如何按照文档进行操作：
1. 获取访问令牌（Paypal）以进行进一步的api调用。
2. 使用/v1/oauth2/token创建付款（Create Order API），然后在响应中我们将获得批准 v2/checkout/orders ，您需要在此处重定向用户以进行付款付款。
3. url是如何知道移动应用程序中的付款交易是否成功的原因，因为我正在应用程序中使用WebView来加载批准Now my question。

订单是这样创建的，我将href加载到webview中：

url

解决方法

我这样做：

客户成功完成付款后，将使用查询参数return_url和PayerID（ orderID ）调用token。届时，我们可以在数据库中更新用户的付款状态（由于尚未批准或捕获订单，因此尚未扣除金额。）
此后，我们可以捕获我们的订单（确保发票编号不重复），否则状态将不会完成。

如果在截获时未批准订单，则会出现此类错误：

 {
 "name": "UNPROCESSABLE_ENTITY","details": [
     {
         "issue": "ORDER_NOT_APPROVED","description": "Payer has not yet approved the Order for payment. Please redirect the payer to the 'rel':'approve' url returned as part of the HATEOAS links within the Create Order call or provide a valid payment_source in the request."
     }
 ],"message": "The requested action could not be performed,semantically incorrect,or failed business validation.","debug_id": "47af43e..","links": [
     {
         "href": "https://developer.paypal.com/docs/api/orders/v2/#error-ORDER_NOT_APPROVED","rel": "information_link","method": "GET"
     }
 ]

}

如果发票号重复，则捕获时会看到错误：

 {
 "name": "UNPROCESSABLE_ENTITY","details": [
     {
         "issue": "DUPLICATE_INVOICE_ID","description": "Duplicate Invoice ID detected. To avoid a potential duplicate transaction your account setting requires that Invoice Id be unique for each transaction."
     }
 ],"debug_id": "86e0cc7f....","links": [
     {
         "href": "https://developer.paypal.com/docs/api/orders/v2/#error-DUPLICATE_INVOICE_ID","method": "GET"
     }
 ]

}

如果存在基于货币的问题：

    {
    "name": "UNPROCESSABLE_ENTITY","details": [
        {
            "location": "body","issue": "CURRENCY_NOT_SUPPORTED","description": "Currency code is not currently supported. Please refer https://developer.paypal.com/docs/integration/direct/rest/currency-codes/ for list of supported currency codes."
        }
    ],"debug_id": "d666b5e5eb0c0","links": [
        {
            "href": "https://developer.paypal.com/docs/api/orders/v2/#error-CURRENCY_NOT_SUPPORTED","method": "GET"
        }
    ]
}

如果成功捕获到状态为COMPLETED的订单：

{
  "id": "8G0042477K865063U","status": "COMPLETED","purchase_units": [
    {
      "reference_id": "default","shipping": {
        "name": {
          "full_name": "John Doe"
        },"address": {
          "address_line_1": "10,east street","address_line_2": "first building","admin_area_2": "Mumbai","admin_area_1": "Maharashtra","postal_code": "400029","country_code": "NZ"
        }
      },"payments": {
        "captures": [
          {
            "id": "4K670967VH2547504","status": "PENDING","status_details": {
              "reason": "RECEIVING_PREFERENCE_MANDATES_MANUAL_ACTION"
            },"amount": {
              "currency_code": "NZD","value": "170.00"
            },"final_capture": true,"seller_protection": {
              "status": "ELIGIBLE","dispute_categories": [
                "ITEM_NOT_RECEIVED","UNAUTHORIZED_TRANSACTION"
              ]
            },"invoice_id": "INV-1234567888","links": [
              {
                "href": "https://api.sandbox.paypal.com/v2/payments/captures/4K670967VH2547504","rel": "self","method": "GET"
              },{
                "href": "https://api.sandbox.paypal.com/v2/payments/captures/4K670967VH2547504/refund","rel": "refund","method": "POST"
              },{
                "href": "https://api.sandbox.paypal.com/v2/checkout/orders/8G0042477K865063U","rel": "up","method": "GET"
              }
            ],"create_time": "2020-10-31T13:35:58Z","update_time": "2020-10-31T13:35:58Z"
          }
        ]
      }
    }
  ],"payer": {
    "name": {
      "given_name": "Sumit","surname": "Shukla"
    },"email_address": "testg32@gmail.com","payer_id": "VW87TYSM2GMZ4","address": {
      "address_line_1": "10,"country_code": "NZ"
    }
  },"links": [
    {
      "href": "https://api.sandbox.paypal.com/v2/checkout/orders/8G0042477K865063U","method": "GET"
    }
  ]
}

之后，您可以将用户重定向到“谢谢”页面，并根据数据库值更新移动应用程序屏幕。