Android WeChat payment-precautions: android payment

Android payment-precautions: android payment

Pitfall 1: Generation of the PayReq parameter sign

The PayReq object has a parameter packageValue.

PackageValue is used when sign is generated, but the corresponding Key is package. The key here is easy to make a mistake.

List<NameValuePair> signParams = new LinkedList<NameValuePair>();signParams.add(new BasicNameValuePair("appid", req.appId));signParams.add(new BasicNameValuePair("noncestr", req.nonceStr));signParams.add(new BasicNameValuePair("package", req.packageValue));signParams.add(new BasicNameValuePair("partnerid", req.partnerId));signParams.add(new BasicNameValuePair("prepayid", req.prepayId));signParams.add(new BasicNameValuePair("timestamp", req.timeStamp));

 

Pitfall 2: Payment callback Method

Use reflection to find the corresponding class and implement the callback

The official descriptions are as follows:

Refer to the SDK Sample in. net. sourceforge. simcpux. implement the WXPayEntryActivity class in the wxapi package path (inconsistent package names or class names will cause callback failure). Implement the onResp function in the WXPayEntryActivity class. After the payment is complete, the APP returns to the merchant APP and calls back the onResp function. The developer needs to receive the notification in the function to determine whether the error code is returned. If the payment is successful, go to the background to query the payment result and then display the user's actual payment result.

Meaning:

1. You need to create a packageName +. wxapi package, for example, your project registration: com. android. qq. Then you need to create a wxapi package under the package name.

2. Create an Activity class named WXPayEntryActivity under the package and implement the interface IWXAPIEventHandler. The payment callback is carried out in the onResp (BaseResp resp) method of the interface.

Package com. android. qq. wxapi; public class WXPayEntryActivity extends Activity implements IWXAPIEventHandler {@ Override public void onResp (BaseResp resp) {// process payment callback }}

 

Iii. Signature Test

This is not a pitfall. Many third parties have to test it in this way.

The paid test must correspond to the signed package; otherwise, the payment function cannot be tested.