微信刷卡支付

准备工作：

1.首先，想要了解微信支付的流程，我们先通过微信开发平台，根据我们的需求，找到所需文档；
2.通过需求了解到，需要创建移动应用，根据自己的需求开通商户，并且开通微信支付功能；
3.根据开发文档下载java版的sdk，当然这一般情况下服务器端做的，可以通过pom.xml文件了解sdk详情；
4.所需值的路径或出处：

appId:应用appId
mactchId :商户号
key:商户平台->账号中心->账户设置->API安全->然后自己设置
证书路径:商户平台->账号中心->账户设置->API安全->下载证书

开发过程

a.添加依赖：

compile 'com.github.wxpay:WXPay-SDK-Java:0.0.4'
b.然后实现WXPayConfig 类；

public class WXConfig implements WXPayConfig {
    private  byte[] certData;

    public WXConfig() throws Exception {
        String certPath = iExec.getCertPath() + "/apiclient_cert.p12";
        File file = new File(certPath);
        InputStream certStream = new FileInputStream(file);
        this.certData = new byte[(int) file.length()];
        certStream.read(this.certData);
        certStream.close();
    }
    @Override
    public String getAppID() {
        return "wx234444";
    }

    @Override
    public String getMchID() {
        return "11111111";
    }

    @Override
    public String getKey() {
        return "kluDqARvZg3LLNfffffffffffffffffffffff";
    }

    @Override
    public InputStream getCertStream() {
        ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
        return certBis;
    }

    @Override
    public int getHttpConnectTimeoutMs() {
        return 8000;
    }

    @Override
    public int getHttpReadTimeoutMs() {
        return 10000;
    }
}

c.申请支付接口：

        WXConfig config = null;
        try {
            config = new WXConfig();
        } catch (Exception e) {
            e.printStackTrace();
        }
      WXPay mPay = new WXPay(config); 

d.最后调用微信支付接口，可以通过sdk中README.md了解；
微信开发文档
通过native支付文档中模式2可以知道整个的步骤；
对于编代码简单来说：

1，统一订单，展示二维码

 public void unitOrder() {
       Map<String, String>  data = new HashMap<String, String>();
        data.put("body", "commodity");
        final String outTradeNo = getOutTradeNo();
        data.put("out_trade_no", outTradeNo);
        data.put("device_info", "roy");
        data.put("fee_type", "CNY");
        data.put("total_fee", "1");
        String ip = IpUtils.getIpAddress(mContext);
        Log.e("www", "ip = " + ip);
        data.put("spbill_create_ip", ip);
        data.put("notify_url", "http://www.example.com/wxpay/notify");
        data.put("trade_type", "NATIVE");  // 此处指定为扫码支付
        data.put("product_id", "12");
        Log.e("www", "data = " + data.toString());
        new Thread() {
            @Override
            public void run() {
                super.run();
                Map<String, String> resp = null;
                try {
                    resp = mPay.unifiedOrder(data);
                    Log.e("www", "resp = " + resp.toString());
                    String result_code_value = resp.get(RESULT_CODE_KEY);
                    Log.e("www", "result_code_value = " + result_code_value);
                    if (RESULT_SUCCESS.equals(result_code_value)) {
                        String codeUrl = resp.get(CODE_URL_KEY);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                    Log.e("www", "Exception = " + e.getMessage());
                }
            }
        }.start();
    }

2，查询订单

 /***查询订单**/
    public void queryPay(String outTradeNo) {
      Map<String, String>  data = new HashMap<String, String>();
        data.put("out_trade_no", outTradeNo);
        new Thread() {
            @Override
            public void run() {
                super.run();
                try {
                    Map<String, String> resp = mPay.orderQuery(data,1000, 1000);
                    Log.e("www", "queryPay , resp = " + resp.toString());
                    String tradeStateValue = resp.get(TRADE_STATE_KEY);
                    String outTradeNo = resp.get(OUT_TRADE_NO);
                    boolean isSucess = tradeStateValue.equals(RESULT_SUCCESS);
                    listener.onOrderQuery(isSucess,outTradeNo);
                    udpsender.getInstance().push("139.196.34.81", 7001, "queryPay , resp = " + resp.toString());
                } catch (Exception e) {
                    e.printStackTrace();
                    Log.e("www", "Exception = " + e.getMessage());
                    udpsender.getInstance().push("139.196.34.81", 7001, "queryPay , Exception = " + e.getMessage());
                }
            }
        }.start();
    }

备注：欢迎大家一起讨论。