開發前提：

擁有支付寶賬戶登錄授權業務入參pid值。擁有APPID、App支付寶登錄功能併成功簽約

一、需求

用戶在APP點擊登錄後，選擇第三方登錄中的“支付寶”，跳轉到支付寶客戶端進行授權登錄（手機安裝了支付寶客戶端），或網頁端掃碼登錄（手機未安裝支付寶客戶端）。用戶同意登錄後獲取到用戶的基本信息。

二、開發流程

APP支付寶授權登錄獲取用戶信息流程圖：

1. Android客戶端調用支付寶無線賬戶授權接口，引導用戶授權，獲取會員授權碼（auth_code）與支付寶會員ID（user_id）。若匹配user_id成功，則完成登錄；否則繼續下一步。

2. 服務端調用授權令牌接口（alipay.system.oauth.token），通過auth_code換取access_token。auth_code作爲換取access_token的票據，auth_code只能使用一次，一天未被使用自動過期。

3. 服務端調用用戶信息共享接口(alipay.user.info.share)，通過access_token獲取用戶的userId、暱稱、頭像等基礎信息。access_token只能使用一次

三、開發環境及使用到的技術

1、後端採用IDEA2017 進行開發

2、前端使用Android Studio 3.1.3 進行開發

3、後端必須基於JDK7以上版本，採用JDK8開發，前端基於Android SDK4.4

4、使用fastJson對json數據進行處理

四、具體實現步驟

1.前端(Android)

目錄結構

1).Android微信授權登錄開發環境配置

I.添加支付寶sdk包

將alipaySdk-xxxxxxxx.jar包放入應用工程的libs目錄下。

將jar包添加入環境，將libs目錄下jar包導入。

Build.gradle中，導入包

dependencies {

// 支付寶相關

implementation files('libs/alipaySdk-20180601.jar')

}

II.修改Manifest文件

添加聲明：

<!--添加聲明-->

<activity

    android:name="com.alipay.sdk.app.H5PayActivity"

    android:configChanges="orientation|keyboardHidden|navigation|screenSize"

    android:exported="false"

    android:screenOrientation="behind"

    android:windowSoftInputMode="adjustResize|stateHidden" >

</activity>

<activity

    android:name="com.alipay.sdk.app.H5AuthActivity"

    android:configChanges="orientation|keyboardHidden|navigation"

    android:exported="false"

    android:screenOrientation="behind"

    android:windowSoftInputMode="adjustResize|stateHidden" >

</activity>

添加權限聲明：

<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" />

III.添加混淆規則：

在proguard-rules.pro文件中添加相關規則：

-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.** { *;}

2).引導用戶點擊的按鈕

新建login.xml.添加按鈕

        <!--支付寶相關-->

        <Button

            android:id="@+id/authV2"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:layout_margin="10dp"

            android:onClick="authV2"

            android:text="支付寶授權登錄"

            tools:ignore="HardcodedText" />

當用戶點擊後，會調用authV2方法

3).loginActivity.java

public class AliPayLoginActivity extends FragmentActivity {

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

I.相關配置參數：

private static final int SDK_PAY_FLAG = 1;
private static final int SDK_AUTH_FLAG = 2;

II．auth2方法

商戶重要信息需要存放在服務端。

Auth2方法中需要做的就是請求我方服務端獲取參數，根據參數請求螞蟻金服開放平臺服務端。

    public void authV2(View v) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                final String authInfo = ApacheHttpUtil.get("http://exzg5x.natappfree.cc"+"/alipay/sign/android");
                Runnable authRunnable = new Runnable() {
                    @Override
                    public void run() {
                        // 構造AuthTask 對象
                        AuthTask authTask = new AuthTask(AliPayLoginActivity.this);
                        // 調用授權接口，獲取授權結果
                        Map<String, String> result = authTask.authV2(authInfo, true);
                        Message msg = new Message();
                        msg.what = SDK_AUTH_FLAG;   //
                        msg.obj = result;
                        mHandler.sendMessage(msg);  // 請求成功後將會發送消息到handler處理
                    }
                };
                // 必須異步調用
                Thread authThread = new Thread(authRunnable);
                authThread.start();
            }
        }).start();
    }

III.Handler屬性

如果獲取到SDK_AUTH_FLAG消息，判斷狀態碼成功後，表明授權成功，螞蟻金服開放平臺將會返回code和openid，根據這兩個參數向服務端發送請求，獲取用戶信息。

根據請求獲取到的數據進行解析處理，然後跳轉到個人信息頁。

@SuppressLint("HandlerLeak")
    private Handler mHandler = new Handler() {
        @SuppressWarnings("unused")
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case SDK_AUTH_FLAG: {
                    @SuppressWarnings("unchecked")
                    final AuthResult authResult = new AuthResult((Map<String, String>) msg.obj, true);
                    String resultStatus = authResult.getResultStatus();
                    // 判斷resultStatus 爲“9000”且result_code
                    // 爲“200”則代表授權成功，具體狀態碼代表含義可參考授權接口文檔
                    if (TextUtils.equals(resultStatus, "9000") && TextUtils.equals(authResult.getResultCode(), "200")) {
                        // 獲取alipay_open_id，調支付時作爲參數extern_token 的value
                        // 傳入，則支付賬戶爲該授權賬戶
                        Toast.makeText(AliPayLoginActivity.this, "授權成功\n" + String.format("authCode:%s", authResult.getAuthCode()), Toast.LENGTH_SHORT) show();
                        new Thread(new Runnable() {
                            @Override
                            public void run() {
                 // 向服務端發送請求,預計返回用戶信息數據，返回給前端進行顯示。
                                String url = "http://exzg5x.natappfree.cc" +
                                        "/alipay/getalipayMobileUserInfo" + "?" +
                                        "app_id=" + Constants.ALPAY_APP_ID +
                                       "&auth_code=" + authResult.getAuthCode() +
                                        "&scope=auth_user";
                                String str = ApacheHttpUtil.get(url);
                                JSONObject jsonObject =  (JSONObject) JSONObject.parse(str);
                                aliPayUserInfo = (AliPayUserInfo)JSON.parseObject(jsonObject.get("data").toString(), new TypeReference<AliPayUserInfo>() {});
                            }
                        }).start();

                        while (true){
                            // TODO: 這裏處理方案不是很合理，死循環或將造成界面卡死
                            if (aliPayUserInfo!=null){
                                Intent intent = new Intent(AliPayLoginActivity.this, listviewItem.class);
                                /* 通過Bundle對象存儲需要傳遞的數據 */
                                Bundle bundle = new Bundle();
                                bundle.putString("alipayUserId", aliPayUserInfo.getUserId());
                                bundle.putString("alipayAvatar", aliPayUserInfo.getAvatar());
                                bundle.putString("alipayNickName", aliPayUserInfo.getNickName());
                                bundle.putString("alipayCity", aliPayUserInfo.getCity());
                                bundle.putString("alipayGender", aliPayUserInfo.getGender());
                                bundle.putString("alipayIsCertified", aliPayUserInfo.getIs_certified());
                                bundle.putString("alipayIsStudentCertified", aliPayUserInfo.getIs_student_certified());
                                bundle.putString("alipayProvince", aliPayUserInfo.getProvince());
                                bundle.putString("alipayUserStatus", aliPayUserInfo.getUser_status());
                                bundle.putString("alipayUserType", aliPayUserInfo.getUser_type());
                                /*把bundle對象assign給Intent*/
                                intent.putExtras(bundle);
                                startActivity(intent);
                                break;
                            }
                        }
                    } else {
                        // 其他狀態值則爲授權失敗
                        Toast.makeText(AliPayLoginActivity.this, "授權失敗" + String.format("authCode:%s", authResult.getAuthCode()), Toast.LENGTH_SHORT).show();
                    }
                    break;
                }
                default:
                    break;
            }
        }
        ;
    };

4).AliPayUserInfoViewItem.java：

需要獲取Bundle，然後將數據設置到對應控件中。

public class listviewItem extends FragmentActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listview_item);
        Bundle bundle = this.getIntent().getExtras();
        TextView alipayUserId = (TextView) findViewById(R.id.alipayUserId);
        alipayUserId.setText(bundle.getString("alipayUserId"));

        TextView alipayNickName = (TextView) findViewById(R.id.alipayNickName);
        alipayNickName.setText(bundle.getString("alipayNickName"));

        TextView alipayCity = (TextView) findViewById(R.id.alipayCity);
        alipayCity.setText(bundle.getString("alipayCity"));

        TextView alipayGender = (TextView) findViewById(R.id.alipayGender);
        alipayGender.setText(bundle.getString("alipayGender"));

        TextView alipayIsCertified = (TextView) findViewById(R.id.alipayIsCertified);
        alipayIsCertified.setText(bundle.getString("alipayIsCertified"));

        TextView alipayIsStudentCertified = (TextView) findViewById(R.id.alipayIsStudentCertified);
   alipayIsStudentCertified.setText(bundle.getString("alipayIsStudentCertified"));
        TextView alipayProvince = (TextView) findViewById(R.id.alipayProvince);
        alipayProvince.setText(bundle.getString("alipayProvince"));

        TextView alipayUserStatus = (TextView) findViewById(R.id.alipayUserStatus);
        alipayUserStatus.setText(bundle.getString("alipayUserStatus"));

        TextView alipayUserType = (TextView) findViewById(R.id.alipayUserType);
        alipayUserType.setText(bundle.getString("alipayUserType"));
    }

2.服務端(Java)

1).服務端加簽

@ResponseBody
@RequestMapping("/sign/{type}")
public String sign(@PathVariable("type") String type){
    if (!StringUtils.isEmpty(type)&&type.equals("android")){
        Map<String, String> authInfoMap = OrderInfoUtil2_0.buildAuthInfoMap(
                env.getProperty("alipay.pid"),
                env.getProperty("alipay.appid"),
                env.getProperty("alipay.targetId"), true);
        String info = OrderInfoUtil2_0.buildOrderParam(authInfoMap);
        String privateKey = env.getProperty("alipay.privatekey");
        String sign = OrderInfoUtil2_0.getSign(authInfoMap, privateKey, true);
        final String authInfo = info + "&" + sign;
        return authInfo;
    }
    return null;
}

2).配置

增加配置pid以及targetId。

其中pid爲商戶pid，targetId爲商戶自定義的id

# 商戶pid
alipay.pid =

# TARGET_ID
# 支付寶賬戶登錄授權業務：入參target_id值，這個target_id參數是商戶自定義的，不需要獲取。
alipay.targetId =

3).獲取用戶信息

@ResponseBody
    @RequestMapping("/getalipayMobileUserInfo")
    public Result getALiPayMobileUserInfo(HttpServletRequest httpServletRequest) {
        String appId = httpServletRequest.getParameter("app_id");
        String scope = httpServletRequest.getParameter("scope");
        String authCode = httpServletRequest.getParameter("auth_code");
        if (appId == null || scope == null || authCode == null ){
            Result.error(CodeMsg.PARAM_ISNULL);
        }
        // 判定appid是否是我們的 Android傳過來的Appid和服務單Appid有點差異
        if(!appId.contains(env.getProperty("alipay.appid").trim())){
            Result.error(CodeMsg.ILLEGAL_PARAM);
        }
        AlipayClient alipayClient = new DefaultAlipayClient(
                env.getProperty("alipay.serverUrl"),
                env.getProperty("alipay.appid"),
                env.getProperty("alipay.privatekey"),
                "json", "UTF-8",
                env.getProperty("alipay.publickey"),
                "RSA2"); //獲得初始化的AlipayClient

        AlipaySystemOauthTokenRequest request = new AlipaySystemOauthTokenRequest();//創建API對應的request類
        request.setCode(authCode);
        request.setGrantType("authorization_code");
        try {
            AlipaySystemOauthTokenResponse oauthTokenResponse = alipayClient.execute(request);//通過alipayClient調用API，獲得對應的response類
            log.info("AccessToken："+oauthTokenResponse.getAccessToken());
            // 獲取用戶信息
            AliPayUserInfo aliPayUserInfo = getAliPayUserInfo(alipayClient,oauthTokenResponse.getAccessToken());
            if (aliPayUserInfo==null){
                Result.error(CodeMsg.FAIL_GETUSERINFO);
            }
            // 統一返回結果。
            return Result.success(aliPayUserInfo);
        } catch (AlipayApiException e) {
            //處理異常
            e.printStackTrace();
        }
        return Result.error(CodeMsg.UNKNOW_ERROR);
    }

五、注意事項：

1.Android4.0以上版本,發送網絡請求時，必須是以線程異步的方式發送請求，否則發送請求會失敗。

附錄：

App支付寶登錄授權參數

https://docs.open.alipay.com/218/105327

螞蟻開放平臺開發第三方授權登陸（三）：Android端

一、需求

二、開發流程

三、開發環境及使用到的技術

四、具體實現步驟

1.前端(Android)

1).Android微信授權登錄開發環境配置

2).引導用戶點擊的按鈕

3).loginActivity.java

4).AliPayUserInfoViewItem.java：

2.服務端(Java)

1).服務端加簽

2).配置

3).獲取用戶信息

五、注意事項：

附錄：

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微信開放平臺開發第三方授權登陸（四）：微信公衆號

螞蟻開放平臺開發第三方授權登陸（三）：Android端

微信開放平臺開發第三方授權登陸（五）：微信小程序

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