支付宝alipaySdk-20170922集成

支付宝支付很简单，但是新的sdk还是有些坑要去踩下才知道。

• 1.省略一些步骤。下载最新sdk。

• 2.调用本地支付方法 zfbPay();方法参数都是后台接口返回，具体参数如下：

{
    "code": 200,
    "data": {
        "acctId": "",
        "amount": "",
        "callback": "", //回调地址
        "keyWord": "", 
        "orderid": "", //订单号
        "privatekey": "", //私钥
        "sellerId": "" //商户id
    },
    "flag": true,
    "info": "",
    "msg": ""
}

    private void zfbPay(String privateKey, String sellerId, String out_trade_no, String body, String notify_url, String price) {

        boolean rsa2 = true; 
        Map<String, String> params = OrderInfoUtil2_0.buildOrderParamMap(sellerId, body, out_trade_no, notify_url, price, rsa2);
        String orderParam = OrderInfoUtil2_0.buildOrderParam(params);
        String sign = OrderInfoUtil2_0.getSign(params, privateKey, rsa2);
        // 完整的符合支付宝参数规范的订单信息
        final String orderInfo = orderParam + "&" + sign;
        Runnable payRunnable = new Runnable() {
            @Override
            public void run() {
                PayTask alipay = new PayTask(SelectPayTypeActivity.this);
                Map<String, String> result = alipay.payV2(orderInfo, true);
                LogUtil.i("msp", result.toString());

                Message msg = new Message();
                msg.what = SDK_PAY_FLAG;
                msg.obj = result;
                mHandler.sendMessage(msg);
            }
        };

        Thread payThread = new Thread(payRunnable);
        payThread.start();
    }

• 3.在支付宝sdk demo中找到这个类

public class OrderInfoUtil2_0 {


    /**
     * 构造支付订单参数列表
     *
     * @param app_id
     * @return
     */
    public static Map buildOrderParamMap(String app_id, String body, String out_trade_no, String notify_url, String money, boolean rsa2) {
        Map keyValues = new HashMap();

        //商户签约拿到的app_id，如：2013081700024223
        keyValues.put("app_id", app_id);

        keyValues.put("biz_content", "{\"timeout_express\":\"30m\"," +
                "\"product_code\":\"QUICK_MSECURITY_PAY\"," +
                "\"total_amount\":\""+money+"\"," +
                "\"subject\":\"" + "支付订单" + "\"," +
                "\"body\":\"支付\"," +
                "\"out_trade_no\":\"" + out_trade_no + "\"}");

        keyValues.put("charset", "utf-8");

        keyValues.put("method", "alipay.trade.app.pay");

        keyValues.put("sign_type", rsa2 ? "RSA2" : "RSA");

        keyValues.put("notify_url", notify_url);

        keyValues.put("timestamp", getTimeStamp());  // 2016-07-29 16:55:53

        keyValues.put("body", body);

        keyValues.put("version", AppData.APP_VERSION);

        return keyValues;
    }

    private static String getTimeStamp() {
        Date d = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String dateNowStr = sdf.format(d);
        return dateNowStr;
    }

    /**
     * 构造支付订单参数信息
     *
     * @param map 支付订单参数
     * @return
     */
    public static String buildOrderParam(Map map) {
        List keys = new ArrayList(map.keySet());

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < keys.size() - 1; i++) {
            String key = keys.get(i);
            String value = map.get(key);
            sb.append(buildKeyValue(key, value, true));
            sb.append("&");
        }

        String tailKey = keys.get(keys.size() - 1);
        String tailValue = map.get(tailKey);
        sb.append(buildKeyValue(tailKey, tailValue, true));

        return sb.toString();
    }

    /**
     * 拼接键值对
     *
     * @param key
     * @param value
     * @param isEncode
     * @return
     */
    private static String buildKeyValue(String key, String value, boolean isEncode) {
        StringBuilder sb = new StringBuilder();
        sb.append(key);
        sb.append("=");
        if (isEncode) {
            try {
                sb.append(URLEncoder.encode(value, "UTF-8"));
            } catch (UnsupportedEncodingException e) {
                sb.append(value);
            }
        } else {
            sb.append(value);
        }
        return sb.toString();
    }

    /**
     * 对支付参数信息进行签名
     *
     * @param map 待签名授权信息
     * @return
     */
    public static String getSign(Map map, String rsaKey, boolean rsa2) {
        List keys = new ArrayList(map.keySet());
        // key排序
        Collections.sort(keys);

        StringBuilder authInfo = new StringBuilder();
        for (int i = 0; i < keys.size() - 1; i++) {
            String key = keys.get(i);
            String value = map.get(key);
            authInfo.append(buildKeyValue(key, value, false));
            authInfo.append("&");
        }

        String tailKey = keys.get(keys.size() - 1);
        String tailValue = map.get(tailKey);
        authInfo.append(buildKeyValue(tailKey, tailValue, false));

        String oriSign = SignUtils.sign(authInfo.toString(), rsaKey, rsa2);
        String encodedSign = "";

        try {
            encodedSign = URLEncoder.encode(oriSign, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return "sign=" + encodedSign;
    }

    /**
     * 要求外部订单号必须唯一。
     *
     * @return
     */
    private static String getOutTradeNo() {
        SimpleDateFormat format = new SimpleDateFormat("MMddHHmmss", Locale.getDefault());
        Date date = new Date();
        String key = format.format(date);

        Random r = new Random();
        key = key + r.nextInt();
        key = key.substring(0, 15);
        return key;
    }

}

• 4.支付结果回调

private Handler mHandler = new Handler() {
        @SuppressWarnings("unused")
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case SDK_PAY_FLAG: {
                    @SuppressWarnings("unchecked")
                    PayResult payResult = new PayResult((Map) msg.obj);
                    /**
                     对于支付结果，请商户依赖服务端的异步通知结果。同步通知结果，仅作为支付结束的通知。
                     */
                    String resultInfo = payResult.getResult();// 同步返回需要验证的信息
                    String resultStatus = payResult.getResultStatus();
                    // 判断resultStatus 为9000则代表支付成功
                    if (TextUtils.equals(resultStatus, "9000")) {
                        // 该笔订单是否真实支付成功，需要依赖服务端的异步通知。
                        Toast.makeText(SelectPayTypeActivity.this, "支付成功", Toast.LENGTH_SHORT).show();
                        finish();
                    } else {
                        // 该笔订单真实的支付结果，需要依赖服务端的异步通知。
                        Toast.makeText(SelectPayTypeActivity.this, "支付失败", Toast.LENGTH_SHORT).show();
                    }
                    break;
                }
                default:
                    break;
            }
        }

        ;
    };