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1、获取PrepayId

@Override

protected Map<String,String>  doInBackground(Void... params) {

String url = String.format("https://api.mch.weixin.qq.com/pay/unifiedorder");

String entity = genProductArgs();

Log.e("orion",entity);

byte[] buf = Util.httpPost(url, entity);

String content = new String(buf);

Log.e("orion", content);

Map<String,String> xml=decodeXml(content);

return xml;

}

2、生成支付参数

private void genPayReq() {

req.appId = Constants.APP_ID;

req.partnerId = Constants.MCH_ID;

req.prepayId = resultunifiedorder.get("prepay_id");

req.packageValue = "Sign=WXPay";

req.nonceStr = genNonceStr();

req.timeStamp = String.valueOf(genTimeStamp());

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));

req.sign = genAppSign(signParams);

sb.append("sign\n"+req.sign+"\n\n");

show.setText(sb.toString());

Log.e("orion", signParams.toString());

}

3、发送支付请求

private void sendPayReq() {

msgApi.registerApp(Constants.APP_ID);

msgApi.sendReq(req);

}

4、检查回调结果

在net.sourceforge.simcpux.wxapi包路径中实现WXPayEntryActivity类(包名或类名不一致会造成无法回调)

public void onResp(BaseResp resp) {

if (resp.getType() == ConstantsAPI.COMMAND_PAY_BY_WX) {

  Log.d(TAG, "onPayFinish, errCode = " + resp.errCode);

    AlertDialog.Builder builder = new AlertDialog.Builder(this);

    builder.setTitle(R.string.app_tip);

}

}

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