接入前准备

接入APP支付能力前，开发者需要完成以下前置步骤。

本文档展示了如何从零开始，使用支付宝开放平台服务端 SDK 快速接入App支付产品，完成与支付宝对接的部分。

接入准备——支付宝开发能力

一.下载官方sdk，将sdk放入自己工程libs文件中：

并且在我们的app/build.gradle里配置一下

    // 支付宝 SDK AAR 包所需的配置compile (name: 'alipaysdk-15.8.03.210428205839', ext: 'aar')//这里alipaysdk-15.8.03.210428205839必须和导入的sdk名字一样

二.配置清单文件AndroidManifest.xml：
①添加Activity声明：

        <activityandroid:name="com.alipay.sdk.pay.demo.PayDemoActivity"android:label="@string/app_name" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activityandroid:name="com.alipay.sdk.pay.demo.H5PayDemoActivity"android:configChanges="orientation|keyboardHidden|navigation"android:exported="false"android:screenOrientation="behind" ></activity>

②添加权限声明：

<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" />

<!-- 如果您的 App 的 targetSdkVersion 大于或等于 30，则需要在 AndroidManifest.xml 中提供下面的应用可见性声明，让支付宝 SDK 感知设备上是否已经安装了支付宝 App。同时，您可能还需要升级 Gradle Plugin 到最新版本。关于 Android 11 的 "应用可见性" 机制，参见 https://developer.android.com/about/versions/11/privacy/package-visibility?hl=zh-cn --><queries><package android:name="com.eg.android.AlipayGphone" /> <!-- 支付宝 --><package android:name="hk.alipay.wallet" /> <!-- AlipayHK --></queries>

如果想混淆代码，在工程proguard-rules.pro添加如下代码：

-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 *;}
-keep class com.alipay.sdk.app.H5PayCallback {
<fields>;
<methods>;
}
-keep class com.alipay.android.phone.mrpc.core.** { *; }
-keep class com.alipay.apmobilesecuritysdk.** { *; }
-keep class com.alipay.mobile.framework.service.annotation.** { *; }
-keep class com.alipay.mobilesecuritysdk.face.** { *; }
-keep class com.alipay.tscenter.biz.rpc.** { *; }
-keep class org.json.alipay.** { *; }
-keep class com.alipay.tscenter.** { *; }
-keep class com.ta.utdid2.** { *;}
-keep class com.ut.device.** { *;}

三.支付接口调用

PayDemoActivity.java


public class PayDemoActivity extends AppCompatActivity {public static int price=100;/*** 用于支付宝支付业务的入参 app_id。*/public static final String APPID = "************";/*** 用于支付宝账户登录授权业务的入参 pid。*/public static final String PID = "************";/*** 用于支付宝账户登录授权业务的入参 target_id。商家的收款账号*/public static final String TARGET_ID = "************";/***  pkcs8 格式的商户私钥。** 	如下私钥，RSA2_PRIVATE 或者 RSA_PRIVATE 只需要填入一个，如果两个都设置了，本 Demo 将优先* 	使用 RSA2_PRIVATE。RSA2_PRIVATE 可以保证商户交易在更加安全的环境下进行，建议商户使用* 	RSA2_PRIVATE。** 	建议使用支付宝提供的公私钥生成工具生成和获取 RSA2_PRIVATE。* 	工具地址：https://doc.open.alipay.com/docs/doc.htm?treeId=291&articleId=106097&docType=1*/public static final String RSA2_PRIVATE = "************";//密钥public static final String RSA_PRIVATE = "";private static final int SDK_PAY_FLAG = 1;private static final int SDK_AUTH_FLAG = 2;@SuppressLint("HandlerLeak")private Handler mHandler = new Handler() {@SuppressWarnings("unused")public void handleMessage(Message msg) {switch (msg.what) {case SDK_PAY_FLAG: {@SuppressWarnings("unchecked")PayResult payResult = new PayResult((Map<String, String>) msg.obj);/*** 对于支付结果，请商户依赖服务端的异步通知结果。同步通知结果，仅作为支付结束的通知。*/String resultInfo = payResult.getResult();// 同步返回需要验证的信息String resultStatus = payResult.getResultStatus();// 判断resultStatus 为9000则代表支付成功if (TextUtils.equals(resultStatus, "9000")) {// 该笔订单是否真实支付成功，需要依赖服务端的异步通知。showAlert(PayDemoActivity.this, getString(R.string.pay_success) + payResult);} else {// 该笔订单真实的支付结果，需要依赖服务端的异步通知。showAlert(PayDemoActivity.this, getString(R.string.pay_failed) + payResult);}break;}}};};@Overrideprotected void onCreate(Bundle savedInstanceState) {
//		EnvUtils.setEnv(EnvUtils.EnvEnum.SANDBOX);//沙箱环境需要的代码super.onCreate(savedInstanceState);setContentView(R.layout.pay_main);Button button = findViewById(R.id.payV2);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {payV2(v);}});}/*** 支付宝支付业务示例*/public void payV2(View v) {if (TextUtils.isEmpty(APPID) || (TextUtils.isEmpty(RSA2_PRIVATE) && TextUtils.isEmpty(RSA_PRIVATE))) {showAlert(this, getString(R.string.error_missing_appid_rsa_private));return;}/** 这里只是为了方便直接向商户展示支付宝的整个支付流程；所以Demo中加签过程直接放在客户端完成；* 真实App里，privateKey等数据严禁放在客户端，加签过程务必要放在服务端完成；* 防止商户私密数据泄露，造成不必要的资金损失，及面临各种安全风险； * * orderInfo 的获取必须来自服务端；*/boolean rsa2 = (RSA2_PRIVATE.length() > 0);Map<String, String> params = OrderInfoUtil2_0.buildOrderParamMap(APPID, rsa2,price);String orderParam = OrderInfoUtil2_0.buildOrderParam(params);String privateKey = rsa2 ? RSA2_PRIVATE : RSA_PRIVATE;String sign = OrderInfoUtil2_0.getSign(params, privateKey, rsa2);final String orderInfo = orderParam + "&" + sign;final Runnable payRunnable = new Runnable() {@Overridepublic void run() {PayTask alipay = new PayTask(PayDemoActivity.this);Map<String, String> result = alipay.payV2(orderInfo, true);Log.i("msp", result.toString());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();}private static void showAlert(Context ctx, String info) {showAlert(ctx, info, null);}private static void showAlert(Context ctx, String info, DialogInterface.OnDismissListener onDismiss) {new AlertDialog.Builder(ctx).setMessage(info).setPositiveButton(R.string.confirm, null).setOnDismissListener(onDismiss).show();}private static void showToast(Context ctx, String msg) {Toast.makeText(ctx, msg, Toast.LENGTH_LONG).show();}private static String bundleToString(Bundle bundle) {if (bundle == null) {return "null";}final StringBuilder sb = new StringBuilder();for (String key: bundle.keySet()) {sb.append(key).append("=>").append(bundle.get(key)).append("\n");}return sb.toString();}
}

OrderInfoUtil2_0.java


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：2013081700024223keyValues.put("app_id", app_id);// 商户签约拿到的pid，如：2088102123816631keyValues.put("pid", pid);// 服务接口名称， 固定值keyValues.put("apiname", "com.alipay.account.auth");// 服务接口名称， 固定值keyValues.put("methodname", "alipay.open.auth.sdk.code.get");// 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：kkkkk091125keyValues.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*/public static Map<String, String> buildOrderParamMap(String app_id, boolean rsa2,int price) {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\":\""+price+"\",\"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;}}

工具类

1.SignUtils.java


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;}}

2.PayResult.java


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);}}}@Overridepublic 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;}
}

3.ExternalFragment.java


public class ExternalFragment extends Fragment {@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {return inflater.inflate(R.layout.pay_external, container, false);}
}

4.在 Android_Demo中移过来这三个

五.布局文件

pay_external.xml

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent" ><LinearLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:orientation="vertical"><Buttonandroid:id="@+id/payV2"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_margin="10dp"android:onClick="payV2"android:textAllCaps="false"android:text="@string/pay_with_alipay" /></LinearLayout></ScrollView>

pay_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"android:gravity="center_horizontal"android:background="#FFFFFF"><ImageViewandroid:layout_marginTop="16dp"android:layout_marginBottom="16dp"android:layout_width="wrap_content"android:layout_height="wrap_content"android:scaleType="centerInside"android:src="@drawable/alipay_logo" /><fragmentandroid:id="@+id/fragment"android:name="com.alipay.sdk.pay.demo.ExternalFragment"android:layout_width="fill_parent"android:layout_height="wrap_content"tools:layout="@layout/pay_external" /></LinearLayout>