Android接入支付宝实现支付功能

Android接入支付宝实现支付功能

Android接入支付宝实现支付功能

我本来是想直接讲Android支付这一块的,包括支付宝,微信,其他第三方整合支付等,但是微信开放平台他对我的账号做了限制,所有我今天就先把重心放在支付宝的支付上,也算是写得尽可能详细些吧,毕竟是第三方的SDK,只要我们耐心的阅读文档和开发引导,这个其实不是很难的,我也是没有用过支付宝的支付,但是我相信,你看完这篇博客,也会对他了如指掌的,好的,我们正文开始

一.准备步骤

  • 1.登录官网

他的官网就是蚂蚁金服的开放平台了,我们可以访问 蚂蚁金服开放平台 ,并且注册账号进行登录

Android接入支付宝实现支付功能

  • 创建应用

如果你是现有的应用直接接入支付功能的话,可以不看这里,我这里是因为需要讲博客所有重新创建了一个项目并且在Android Studio里也重新创建了一个项目,Android Studio里创建的项目我把他叫做SimpleMall,简单商城的意思,那在开放平台我们又是如何去创建应用呢,点击-进入我的开放平台-应用,就可以看到应用管理了。我们点击创建应用

Android接入支付宝实现支付功能

创建成果之后有很多的选项包括需要你上传

Android接入支付宝实现支付功能

这些先不管,我们这个时候可以看到已经拿到了APPID: 2017062807585767,这样我们就可以继续下一步的准备了

  • 3.签约

大部分的功能需要签约才能使用,很遗憾,我这个个体户就不行了

Android接入支付宝实现支付功能

  • 4.配置密钥

配置秘钥是支付这一环节很重要的因素,也是分了两个步骤,生成秘钥和配置秘钥,这里使用的RAS非对称加密

生成RSA秘钥

我们按照文档上来,首先是下载工具了,这里有win和mac两个地址,我是win,下载下来是这个样子的

Android接入支付宝实现支付功能

我们按照图中的配置拿到了公钥和私钥

Android接入支付宝实现支付功能

那我们可以配置了,我们找到项目详情

Android接入支付宝实现支付功能

然后这里是两种方式,我们选择的是RSA方式么其实哪种方式都是可以的

Android接入支付宝实现支付功能

到这里,这个也配置好了

  • 5.SDK 下载

到这里,我们就可以直接去下载他的SDK了SDK下载地址

这个压缩包下载下来什么都有,要找到Android的部分

Android接入支付宝实现支付功能

二.SDK集成

我们现在就开始来把jar集成进去,支付宝给我们提供的就是一个jar,我们放进我们的工程里面去

并且在我们的app/build.gradle里配置一下

compile files('libs/alipaySdk-20170623-proguard.jar')
  • 1

这样Jar就集成好了,然后配置一下清单文件

        <activity
            android:name="com.alipay.sdk.app.H5PayActivity"
            android:configChanges="orientation|keyboardHidden|navigation"
            android:exported="false"
            android:screenOrientation="behind"/>

        <activity
            android:name="com.alipay.sdk.auth.AuthActivity"
            android:configChanges="orientation|keyboardHidden|navigation"
            android:exported="false"
            android:screenOrientation="behind"/>

并且添加权限

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

如大于等于Android6.0,还需要动态申请下权限

如果你的项目需要混淆,需要添加混淆规则

-libraryjars libs/alipaySDK-20150602.jar

-keep class com.alipay.android.app.IAlixPay{*;}
-keep class com.alipay.android.app.IAlixPay$Stub{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback{*;}
-keep class com.alipay.android.app.IRemoteServiceCallback$Stub{*;}
-keep class com.alipay.sdk.app.PayTask{ public *;}
-keep class com.alipay.sdk.app.AuthTask{ public *;}

嗯,可以说得上是比较简单的,我们继续

三.支付接口调用

其实支付宝的调用还是比较简单的,我们来看一下我的调用方式

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

    private Button btnPay;
    private static final int SDK_PAY_FLAG = 1001;
    private String RSA_PRIVATE = "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";
    public static final String APPID = "2017062807585767";

    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            switch (msg.what) {
                case SDK_PAY_FLAG:
                    PayResult payResult = new PayResult((Map<String, String>) msg.obj);
                    //同步获取结果
                    String resultInfo = payResult.getResult();
                    Log.i("Pay", "Pay:" + resultInfo);
                    String resultStatus = payResult.getResultStatus();
                    // 判断resultStatus 为9000则代表支付成功
                    if (TextUtils.equals(resultStatus, "9000")) {
                        Toast.makeText(MainActivity.this, "支付成功", Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(MainActivity.this, "支付失败", Toast.LENGTH_SHORT).show();
                    }
                    break;
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        btnPay = (Button) findViewById(R.id.btnPay);
        btnPay.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.btnPay:
                //秘钥验证的类型 true:RSA2 false:RSA
                boolean rsa = false;
                //构造支付订单参数列表
                Map<String, String> params = OrderInfoUtil2_0.buildOrderParamMap(APPID, rsa);
                //构造支付订单参数信息
                String orderParam = OrderInfoUtil2_0.buildOrderParam(params);
                //对支付参数信息进行签名
                String sign = OrderInfoUtil2_0.getSign(params, RSA_PRIVATE, rsa);
                //订单信息
                final String orderInfo = orderParam + "&" + sign;
                //异步处理
                Runnable payRunnable = new Runnable() {

                    @Override
                    public void run() {
                        //新建任务
                        PayTask alipay = new PayTask(MainActivity.this);
                        //获取支付结果
                        Map<String, String> result = alipay.payV2(orderInfo, true);
                        Message msg = new Message();
                        msg.what = SDK_PAY_FLAG;
                        msg.obj = result;
                        mHandler.sendMessage(msg);
                    }
                };
                // 必须异步调用
                Thread payThread = new Thread(payRunnable);
                payThread.start();
                break;
        }
    }
}

可以看到我们并没有多少代码,调用起来

Android接入支付宝实现支付功能

但是还是提示有错误,我们来看一下他的返回值

{"alipay_trade_app_pay_response":{"code":"40006","msg":"Insufficient Permissions","sub_code":"isv.insufficient-isv-permissions","sub_msg":"ISV权限不足"}}

这是因为我们这个应用并没有去签约功能,所有并没有这个权限,好的,但是起码可以看出我们已经可以调用支持包的支付了,那我们继续来了解他的功能吧

四.Api

首先我们看下他提供的OrderInfoUtil2_0这个工具类

public class OrderInfoUtil2_0 {

    /**
     * 构造授权参数列表
     * 
     * @param pid
     * @param app_id
     * @param target_id
     * @return
     */
    public static Map<String, String> buildAuthInfoMap(String pid, String app_id, String target_id, boolean rsa2) {
        Map<String, String> keyValues = new HashMap<String, String>();

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

        // 商户签约拿到的pid,如:2088102123816631
        keyValues.put("pid", pid);

        // 服务接口名称, 固定值
        keyValues.put("apiname", "com.alipay.account.auth");

        // 商户类型标识, 固定值
        keyValues.put("app_name", "mc");

        // 业务类型, 固定值
        keyValues.put("biz_type", "openservice");

        // 产品码, 固定值
        keyValues.put("product_id", "APP_FAST_LOGIN");

        // 授权范围, 固定值
        keyValues.put("scope", "kuaijie");

        // 商户唯一标识,如:kkkkk091125
        keyValues.put("target_id", target_id);

        // 授权类型, 固定值
        keyValues.put("auth_type", "AUTHACCOUNT");

        // 签名类型
        keyValues.put("sign_type", rsa2 ? "RSA2" : "RSA");

        return keyValues;
    }

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

        keyValues.put("app_id", app_id);

        keyValues.put("biz_content", "{\"timeout_express\":\"30m\",\"product_code\":\"QUICK_MSECURITY_PAY\",\"total_amount\":\"0.01\",\"subject\":\"1\",\"body\":\"我是测试数据\",\"out_trade_no\":\"" + getOutTradeNo() +  "\"}");

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

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

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

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

        keyValues.put("version", "1.0");

        return keyValues;
    }

    /**
     * 构造支付订单参数信息
     * 
     * @param map
     * 支付订单参数
     * @return
     */
    public static String buildOrderParam(Map<String, String> map) {
        List<String> keys = new ArrayList<String>(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<String, String> map, String rsaKey, boolean rsa2) {
        List<String> keys = new ArrayList<String>(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;
    }

}

而我们一开始就需要构建订单参数列表,就是这个方法

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

        keyValues.put("app_id", app_id);

        keyValues.put("biz_content", "{\"timeout_express\":\"30m\",\"product_code\":\"QUICK_MSECURITY_PAY\",\"total_amount\":\"0.01\",\"subject\":\"1\",\"body\":\"我是测试数据\",\"out_trade_no\":\"" + getOutTradeNo() +  "\"}");

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

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

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

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

        keyValues.put("version", "1.0");

        return keyValues;
    }

这个方法我们来解读一下吧,他其实就是构建一个Map的键值对,都有哪些内容呢

  • app_id(key)
  • biz_content(内容)
  • charset(编码)
  • method(方法)
  • sign_type(签名类型)
  • timestamp(时间戳)
  • version(版本)

这个demo里面可能都是写死了,但是如果我们真的要在实际应用中开发支付的话,这里要填写正确,我们主要关心的有方法和签名类型还有版本这三个

方法有几个类型,要注意一下

Android接入支付宝实现支付功能

其次就是签名方式了,有两种,RSA和RSA2

最后就是版本,版本可以通过PayTask去获取

    //获取版本
    private String getPlayVersion(PayTask payTask){
        return payTask.getVersion();
    }

而关于biz_content,就需要你们自己去定义了,我们来看下全部的参数说明

Android接入支付宝实现支付功能

当我们拿到map之后就可以转换成一个string作为请求信息了,可以看到我们使用的是这个方法

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

他的本质就是拼接出最后的订单信息,如图

Android接入支付宝实现支付功能

好的,现在订单详情已经有了我们就可以把订单加密了

    /**
     * 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<String, String> map, String rsaKey, boolean rsa2) {
        List<String> keys = new ArrayList<String>(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;
    }

这里的加密主要还是用到了SignUtils

public class SignUtils {

    private static final String ALGORITHM = "RSA";

    private static final String SIGN_ALGORITHMS = "SHA1WithRSA";

    private static final String SIGN_SHA256RSA_ALGORITHMS = "SHA256WithRSA";

    private static final String DEFAULT_CHARSET = "UTF-8";

    private static String getAlgorithms(boolean rsa2) {
        return rsa2 ? SIGN_SHA256RSA_ALGORITHMS : SIGN_ALGORITHMS;
    }

    public static String sign(String content, String privateKey, boolean rsa2) {
        try {
            PKCS8EncodedKeySpec priPKCS8 = new PKCS8EncodedKeySpec(
                    Base64.decode(privateKey));
            KeyFactory keyf = KeyFactory.getInstance(ALGORITHM);
            PrivateKey priKey = keyf.generatePrivate(priPKCS8);

            java.security.Signature signature = java.security.Signature
                    .getInstance(getAlgorithms(rsa2));

            signature.initSign(priKey);
            signature.update(content.getBytes(DEFAULT_CHARSET));

            byte[] signed = signature.sign();

            return Base64.encode(signed);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }

}

而SignUtils则启动了Base64

public final class Base64 {

    private static final int BASELENGTH = 128;
    private static final int LOOKUPLENGTH = 64;
    private static final int TWENTYFOURBITGROUP = 24;
    private static final int EIGHTBIT = 8;
    private static final int SIXTEENBIT = 16;
    private static final int FOURBYTE = 4;
    private static final int SIGN = -128;
    private static char PAD = '=';
    private static byte[] base64Alphabet = new byte[BASELENGTH];
    private static char[] lookUpBase64Alphabet = new char[LOOKUPLENGTH];

    static {
        for (int i = 0; i < BASELENGTH; ++i) {
            base64Alphabet[i] = -1;
        }
        for (int i = 'Z'; i >= 'A'; i--) {
            base64Alphabet[i] = (byte) (i - 'A');
        }
        for (int i = 'z'; i >= 'a'; i--) {
            base64Alphabet[i] = (byte) (i - 'a' + 26);
        }

        for (int i = '9'; i >= '0'; i--) {
            base64Alphabet[i] = (byte) (i - '0' + 52);
        }

        base64Alphabet['+'] = 62;
        base64Alphabet['/'] = 63;

        for (int i = 0; i <= 25; i++) {
            lookUpBase64Alphabet[i] = (char) ('A' + i);
        }

        for (int i = 26, j = 0; i <= 51; i++, j++) {
            lookUpBase64Alphabet[i] = (char) ('a' + j);
        }

        for (int i = 52, j = 0; i <= 61; i++, j++) {
            lookUpBase64Alphabet[i] = (char) ('0' + j);
        }
        lookUpBase64Alphabet[62] = (char) '+';
        lookUpBase64Alphabet[63] = (char) '/';

    }

    private static boolean isWhiteSpace(char octect) {
        return (octect == 0x20 || octect == 0xd || octect == 0xa || octect == 0x9);
    }

    private static boolean isPad(char octect) {
        return (octect == PAD);
    }

    private static boolean isData(char octect) {
        return (octect < BASELENGTH && base64Alphabet[octect] != -1);
    }

    /**
     * Encodes hex octects into Base64
     * 
     * @param binaryData
     *            Array containing binaryData
     * @return Encoded Base64 array
     */
    public static String encode(byte[] binaryData) {

        if (binaryData == null) {
            return null;
        }

        int lengthDataBits = binaryData.length * EIGHTBIT;
        if (lengthDataBits == 0) {
            return "";
        }

        int fewerThan24bits = lengthDataBits % TWENTYFOURBITGROUP;
        int numberTriplets = lengthDataBits / TWENTYFOURBITGROUP;
        int numberQuartet = fewerThan24bits != 0 ? numberTriplets + 1
                : numberTriplets;
        char encodedData[] = null;

        encodedData = new char[numberQuartet * 4];

        byte k = 0, l = 0, b1 = 0, b2 = 0, b3 = 0;

        int encodedIndex = 0;
        int dataIndex = 0;

        for (int i = 0; i < numberTriplets; i++) {
            b1 = binaryData[dataIndex++];
            b2 = binaryData[dataIndex++];
            b3 = binaryData[dataIndex++];

            l = (byte) (b2 & 0x0f);
            k = (byte) (b1 & 0x03);

            byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
                    : (byte) ((b1) >> 2 ^ 0xc0);
            byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4)
                    : (byte) ((b2) >> 4 ^ 0xf0);
            byte val3 = ((b3 & SIGN) == 0) ? (byte) (b3 >> 6)
                    : (byte) ((b3) >> 6 ^ 0xfc);

            encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[(l << 2) | val3];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[b3 & 0x3f];
        }

        // form integral number of 6-bit groups
        if (fewerThan24bits == EIGHTBIT) {
            b1 = binaryData[dataIndex];
            k = (byte) (b1 & 0x03);

            byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
                    : (byte) ((b1) >> 2 ^ 0xc0);
            encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[k << 4];
            encodedData[encodedIndex++] = PAD;
            encodedData[encodedIndex++] = PAD;
        } else if (fewerThan24bits == SIXTEENBIT) {
            b1 = binaryData[dataIndex];
            b2 = binaryData[dataIndex + 1];
            l = (byte) (b2 & 0x0f);
            k = (byte) (b1 & 0x03);

            byte val1 = ((b1 & SIGN) == 0) ? (byte) (b1 >> 2)
                    : (byte) ((b1) >> 2 ^ 0xc0);
            byte val2 = ((b2 & SIGN) == 0) ? (byte) (b2 >> 4)
                    : (byte) ((b2) >> 4 ^ 0xf0);

            encodedData[encodedIndex++] = lookUpBase64Alphabet[val1];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[val2 | (k << 4)];
            encodedData[encodedIndex++] = lookUpBase64Alphabet[l << 2];
            encodedData[encodedIndex++] = PAD;
        }

        return new String(encodedData);
    }

    /**
     * Decodes Base64 data into octects
     * 
     * @param encoded
     *            string containing Base64 data
     * @return Array containind decoded data.
     */
    public static byte[] decode(String encoded) {

        if (encoded == null) {
            return null;
        }

        char[] base64Data = encoded.toCharArray();
        // remove white spaces
        int len = removeWhiteSpace(base64Data);

        if (len % FOURBYTE != 0) {
            return null;// should be divisible by four
        }

        int numberQuadruple = (len / FOURBYTE);

        if (numberQuadruple == 0) {
            return new byte[0];
        }

        byte decodedData[] = null;
        byte b1 = 0, b2 = 0, b3 = 0, b4 = 0;
        char d1 = 0, d2 = 0, d3 = 0, d4 = 0;

        int i = 0;
        int encodedIndex = 0;
        int dataIndex = 0;
        decodedData = new byte[(numberQuadruple) * 3];

        for (; i < numberQuadruple - 1; i++) {

            if (!isData((d1 = base64Data[dataIndex++]))
                    || !isData((d2 = base64Data[dataIndex++]))
                    || !isData((d3 = base64Data[dataIndex++]))
                    || !isData((d4 = base64Data[dataIndex++]))) {
                return null;
            }// if found "no data" just return null

            b1 = base64Alphabet[d1];
            b2 = base64Alphabet[d2];
            b3 = base64Alphabet[d3];
            b4 = base64Alphabet[d4];

            decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
            decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
            decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);
        }

        if (!isData((d1 = base64Data[dataIndex++]))
                || !isData((d2 = base64Data[dataIndex++]))) {
            return null;// if found "no data" just return null
        }

        b1 = base64Alphabet[d1];
        b2 = base64Alphabet[d2];

        d3 = base64Data[dataIndex++];
        d4 = base64Data[dataIndex++];
        if (!isData((d3)) || !isData((d4))) {// Check if they are PAD characters
            if (isPad(d3) && isPad(d4)) {
                if ((b2 & 0xf) != 0)// last 4 bits should be zero
                {
                    return null;
                }
                byte[] tmp = new byte[i * 3 + 1];
                System.arraycopy(decodedData, 0, tmp, 0, i * 3);
                tmp[encodedIndex] = (byte) (b1 << 2 | b2 >> 4);
                return tmp;
            } else if (!isPad(d3) && isPad(d4)) {
                b3 = base64Alphabet[d3];
                if ((b3 & 0x3) != 0)// last 2 bits should be zero
                {
                    return null;
                }
                byte[] tmp = new byte[i * 3 + 2];
                System.arraycopy(decodedData, 0, tmp, 0, i * 3);
                tmp[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
                tmp[encodedIndex] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
                return tmp;
            } else {
                return null;
            }
        } else { // No PAD e.g 3cQl
            b3 = base64Alphabet[d3];
            b4 = base64Alphabet[d4];
            decodedData[encodedIndex++] = (byte) (b1 << 2 | b2 >> 4);
            decodedData[encodedIndex++] = (byte) (((b2 & 0xf) << 4) | ((b3 >> 2) & 0xf));
            decodedData[encodedIndex++] = (byte) (b3 << 6 | b4);

        }

        return decodedData;
    }

    /**
     * remove WhiteSpace from MIME containing encoded Base64 data.
     * 
     * @param data
     *            the byte array of base64 data (with WS)
     * @return the new length
     */
    private static int removeWhiteSpace(char[] data) {
        if (data == null) {
            return 0;
        }

        // count characters that's not whitespace
        int newSize = 0;
        int len = data.length;
        for (int i = 0; i < len; i++) {
            if (!isWhiteSpace(data[i])) {
                data[newSize++] = data[i];
            }
        }
        return newSize;
    }
}

这些你都可以在我写的demo里获取到的,我们继续分析就是了,当加密成功之后他会返回一个sign的字符串给我,这就是加密信息,然后通过 订单信息 & 加密订单这种公式就拼接出商品信息

//订单信息
 String orderInfo = orderParam + "&" + sign;

好的,我们的下单需要在异步中操作,也就是我们所见到的Runnable

                Runnable payRunnable = new Runnable() {

                    @Override
                    public void run() {
                        //新建任务
                        PayTask alipay = new PayTask(MainActivity.this);
                        //获取支付结果
                        Map<String, String> result = alipay.payV2(orderInfo, true);
                        Message msg = new Message();
                        msg.what = SDK_PAY_FLAG;
                        msg.obj = result;
                        mHandler.sendMessage(msg);
                    }
                };

在这里他同样的是构建一个PayTask 区调用payV2,里面的参数就是订单信息和一个boolean值,具体参数可以参考

Android接入支付宝实现支付功能

好的,当我们拿到结果后通过Handler回到UI线程

    PayResult payResult = new PayResult((Map<String, String>) msg.obj);
    //同步获取结果
    String resultInfo = payResult.getResult();
    Log.i("Pay", "Pay:" + resultInfo);
    String resultStatus = payResult.getResultStatus();
    // 判断resultStatus 为9000则代表支付成功
    if (TextUtils.equals(resultStatus, "9000")) {
       Toast.makeText(MainActivity.this, "支付成功", Toast.LENGTH_SHORT).show();
    } else {
       Toast.makeText(MainActivity.this, "支付失败", Toast.LENGTH_SHORT).show();
    }

这里其实PayResult只是把结果几个关键信息提取出来了

public class PayResult {
    private String resultStatus;
    private String result;
    private String memo;

    public PayResult(Map<String, String> rawResult) {
        if (rawResult == null) {
            return;
        }

        for (String key : rawResult.keySet()) {
            if (TextUtils.equals(key, "resultStatus")) {
                resultStatus = rawResult.get(key);
            } else if (TextUtils.equals(key, "result")) {
                result = rawResult.get(key);
            } else if (TextUtils.equals(key, "memo")) {
                memo = rawResult.get(key);
            }
        }
    }

    @Override
    public String toString() {
        return "resultStatus={" + resultStatus + "};memo={" + memo
                + "};result={" + result + "}";
    }

    /**
     * @return the resultStatus
     */
    public String getResultStatus() {
        return resultStatus;
    }

    /**
     * @return the memo
     */
    public String getMemo() {
        return memo;
    }

    /**
     * @return the result
     */
    public String getResult() {
        return result;
    }
}

我们如果想看详细的结果,可以打印resultInfo,好的,关于返回参数,可以参考App支付同步通知参数说明

Android接入支付宝实现支付功能

好的,事实上在实际开发中,要做的准备工作并不只是这么点,毕竟涉及到支付这个敏感话题,我这边也只是个人商户,没办法给大家展示正确的结果了,可能有些疏漏,但是大体就是这样

原文地址http://www.bieryun.com/2601.html

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