public class Pay {

                 /**以下四項(xiàng)這些數(shù)值機(jī)密填入自己申請(qǐng)的就好**/
  // 商戶PID
  public static final String PARTNER = "";
  // 商戶收款賬號(hào)
  public static final String SELLER = "";
  // 商戶私鑰，pkcs8格式
  public static final String RSA_PRIVATE = "";
  // 支付寶公鑰
  public static final String RSA_PUBLIC = "";

  private Activity context;
  private String mgoods,mprice,micon;
  private int mtype;
  private String mOutTradeNo;
  public Pay(Activity activity, String goods,String goodsmore,String price,String icon,int type, String outTradeNo) {
    context = activity;
    mprice = price;
    pay(price);
  }


  private Handler mHandler = new Handler() {

    public void handleMessage(Message msg) {
      switch (msg.what) {
        case SDK_PAY_FLAG: {
          PayResult payResult = new PayResult((String) msg.obj);
          /**
           * 同步返回的結(jié)果必須放置到服務(wù)端進(jìn)行驗(yàn)證（驗(yàn)證的規(guī)則請(qǐng)看https://doc.open.alipay.com/doc2/
           * detail.htm?spm=0.0.0.0.xdvAU6&treeId=59&articleId=103665&
           * docType=1) 建議商戶依賴異步通知
           */
          String resultInfo = payResult.getResult();// 同步返回需要驗(yàn)證的信息

          String resultStatus = payResult.getResultStatus();
          // 判斷resultStatus 為“9000”則代表支付成功，具體狀態(tài)碼代表含義可參考接口文檔
          if (TextUtils.equals(resultStatus, "9000")) {
            Toast.makeText(context, "支付成功", Toast.LENGTH_SHORT).show();

          } else {
            // 判斷resultStatus 為非"9000"則代表可能支付失敗
            // "8000"代表支付結(jié)果因?yàn)橹Ц肚涝蚧蛘呦到y(tǒng)原因還在等待支付結(jié)果確認(rèn)，最終交易是否成功以服務(wù)端異步通知為準(zhǔn)（小概率狀態(tài)）
            if (TextUtils.equals(resultStatus, "8000")) {
              Toast.makeText(context, "支付結(jié)果確認(rèn)中", Toast.LENGTH_SHORT).show();

            } else {
              // 其他值就可以判斷為支付失敗，包括用戶主動(dòng)取消支付，或者系統(tǒng)返回的錯(cuò)誤
              Toast.makeText(context, "支付失敗", Toast.LENGTH_SHORT).show();

            }
          }
          break;
        }
        default:
          break;
      }
    };
  };


  /**
   * call alipay sdk pay. 調(diào)用SDK支付
   *
   */
  public void pay(String goods,String goodsmore,String price) {
    if (TextUtils.isEmpty(PARTNER) || TextUtils.isEmpty(RSA_PRIVATE) || TextUtils.isEmpty(SELLER)) {
      new AlertDialog.Builder(context).setTitle("警告").setMessage("需要配置PARTNER | RSA_PRIVATE| SELLER")
          .setPositiveButton("確定", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialoginterface, int i) {
              //
//              finish();
            }
          }).show();
      return;
    }
    String orderInfo = getOrderInfo(goods, goodsmore, price);

    String sign = sign(orderInfo);

    try {
      /**
       * 僅需對(duì)sign 做URL編碼
       */
      sign = URLEncoder.encode(sign, "UTF-8");

    } catch (UnsupportedEncodingException e) {
      e.printStackTrace();
    }

    /**
     * 完整的符合支付寶參數(shù)規(guī)范的訂單信息
     */
    final String payInfo = orderInfo + "&sign=\"" + sign + "\"&" + getSignType();
    Log.i("lff", "orderInfo == " +orderInfo);
    Log.i("lff", "sign == " +sign);    Runnable payRunnable = new Runnable() {

      @Override
      public void run() {
        // 構(gòu)造PayTask 對(duì)象
        PayTask alipay = new PayTask(context);
        // 調(diào)用支付接口，獲取支付結(jié)果
        String result = alipay.pay(payInfo, true);

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

    // 必須異步調(diào)用
    Thread payThread = new Thread(payRunnable);
    payThread.start();
  }

  /**
   * get the sdk version. 獲取SDK版本號(hào)
   *
   */
  public void getSDKVersion() {
    PayTask payTask = new PayTask(context);
    String version = payTask.getVersion();
    Toast.makeText(context, version, Toast.LENGTH_SHORT).show();
  }




  /**
   * create the order info. 創(chuàng)建訂單信息
   *
   */
  private String getOrderInfo(String subject, String body, String price) {

    // 簽約合作者身份ID
    String orderInfo = "partner=" + "\"" + PARTNER + "\"";

    // 簽約賣家支付寶賬號(hào)
    orderInfo += "&seller_id=" + "\"" + SELLER + "\"";

    // 商戶網(wǎng)站唯一訂單號(hào)
    orderInfo += "&out_trade_no=" + "\"" + getOutTradeNo() + "\"";

    // 商品名稱
    orderInfo += "&subject=" + "\"" + subject + "\"";

    // 商品詳情
    orderInfo += "&body=" + "\"" + body + "\"";

    // 商品金額
    orderInfo += "&total_fee=" + "\"" + "0.01" + "\"";

    // 服務(wù)器異步通知頁面路徑
//    orderInfo += "&notify_url=" + "\"" + "http://notify.msp.hk/notify.htm" + "\"";
    orderInfo += "&notify_url=" + "\"" + "http://112.74.129.252/new/zfbCallback" + "\"";
    // 服務(wù)接口名稱， 固定值
    orderInfo += "&service=\"mobile.securitypay.pay\"";

    // 支付類型， 固定值
    orderInfo += "&payment_type=\"1\"";

    // 參數(shù)編碼， 固定值
    orderInfo += "&_input_charset=\"utf-8\"";

    // 設(shè)置未付款交易的超時(shí)時(shí)間
    // 默認(rèn)30分鐘，一旦超時(shí)，該筆交易就會(huì)自動(dòng)被關(guān)閉。
    // 取值范圍：1m～15d。
    // m-分鐘，h-小時(shí)，d-天，1c-當(dāng)天（無論交易何時(shí)創(chuàng)建，都在0點(diǎn)關(guān)閉）。
    // 該參數(shù)數(shù)值不接受小數(shù)點(diǎn)，如1.5h，可轉(zhuǎn)換為90m。
    orderInfo += "&it_b_pay=\"30m\"";

    // extern_token為經(jīng)過快登授權(quán)獲取到的alipay_open_id,帶上此參數(shù)用戶將使用授權(quán)的賬戶進(jìn)行支付
    // orderInfo += "&extern_token=" + "\"" + extern_token + "\"";

    // 支付寶處理完請(qǐng)求后，當(dāng)前頁面跳轉(zhuǎn)到商戶指定頁面的路徑，可空
    orderInfo += "&return_url=\"m.alipay.com\"";

    // 調(diào)用銀行卡支付，需配置此參數(shù)，參與簽名， 固定值 （需要簽約《無線銀行卡快捷支付》才能使用）
    // orderInfo += "&paymethod=\"expressGateway\"";
    return orderInfo;
  }

  /**
   * get the out_trade_no for an order. 生成商戶訂單號(hào)，該值在商戶端應(yīng)保持唯一（可自定義格式規(guī)范）
   *
   */
  private 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;
    return mOutTradeNo;
  }

  /**
   * sign the order info. 對(duì)訂單信息進(jìn)行簽名
   *
   * @param content
   *      待簽名訂單信息
   */
  private String sign(String content) {
    return SignUtils.sign(content, RSA_PRIVATE);
  }

  /**
   * get the sign type we use. 獲取簽名方式
   *
   */
  private String getSignType() {
    return "sign_type=\"RSA\"";
  }

}

package com.easyhomework.teacher.ui;

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;
  }
}