本篇文章为大家展示了Android中怎么接入支付宝实现支付功能，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
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
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
创建成果之后有很多的选项包括需要你上传
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
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
我们按照图中的配置拿到了公钥和私钥
那我们可以配置了，我们找到项目详情
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
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
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
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 { 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; } 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; } 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(); } 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(); } 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; } 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
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
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
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
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
好的，现在订单详情已经有了我们就可以把订单加密了
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); } 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); } 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; } 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
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 + "}"; } public String getResultStatus() { return resultStatus; } public String getMemo() { return memo; } 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
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