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Android接入支付宝 Android接入支付宝实现支付功能实例

刘某人程序员 人气:0
想了解Android接入支付宝实现支付功能实例的相关内容吗,刘某人程序员在本文为您仔细讲解Android接入支付宝的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Android接入支付宝,Android支付宝实现支付,下面大家一起来学习吧。

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

这里写图片描述

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

这里写图片描述

创建成果之后有很多的选项包括需要你上传

这里写图片描述

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

这里写图片描述

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

https://docs.open.alipay.com/291/105971

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

这里写图片描述

我们按照图中的配置拿到了公钥和私钥

这里写图片描述

那我们可以配置了,我们找到项目详情

这里写图片描述

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

这里写图片描述

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

这里写图片描述

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')

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

这里写图片描述

但是还是提示有错误,我们来看一下他的返回值

复制代码 代码如下:

{"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

  1. app_id(key)
  2. biz_content(内容)
  3. charset(编码)
  4. method(方法)
  5. sign_type(签名类型)
  6. timestamp(时间戳)
  7. 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

这里写图片描述

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

这里写图片描述

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

这里写图片描述

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

这里写图片描述

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

这里写图片描述

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,比微信稍微要简单点,我们下次细聊下微信支付,我们感觉去注册个账号去~~~

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