Android Google登录接入

一、接入准备

1、手机必须有Google套件
2、Google服务框架，Google Play商店，Google Play服务（使用su谷歌安装器下载安装）
3、手机必须可以翻墙
4、google开发者账号

二、官网文档

https://developers.google.com/identity/sign-in/android/start-integrating?hl=zh-cn

必看三方文档：https://blog.csdn.net/wangchaojing/article/details/125680497

三、接入步骤

1、依赖google play服务

implementation 'com.google.android.gms:play-services-auth:20.4.1'

2、配置 Google API 控制台项目

需要使用google开发者账号，创建项目，在项目中根据包名和SHA1值创建应用。

控制台: https://console.cloud.google.com/apis/credentials?hl=zh-cn

3、生成SHA1值

图片.png

注意：如果需要base64散列码，看下面

将SHA1值复制到剪贴板，如CD:A1:EA:A3:5C:5C:68:FB:FA:0A:6B:E5:5A:72:64:DD:26:8D:44:84所示，然后打开http://tomeko.net/online_tools/hex_to_base64.php将SHA1值转换为base64。这是Facebook所要求的，获取生成的哈希值********************=，并将密钥哈希值复制到Facebook应用程序。

在通过下面这个网站压缩：
SHA1转化为BASE64.php

图片.png

4、代码

1、 获取GoogleSignInClient 对象

    private final String TAG = getClass().getSimpleName();

    /**
     * google登录客户端对象
     */
    private GoogleSignInClient mGoogleSignInClient;

    private void initGoogleSignInClient() {
        // Configure sign-in to request the user's ID, email address, and basic
        // profile. ID and basic profile are included in DEFAULT_SIGN_IN.
        GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                //请求邮箱
                .requestEmail()
                //请求id token（web client id）
                .requestIdToken("660809532020-g7r2qsmjkjv0ttmje013otrb97s0qtil.apps.googleusercontent.com")
                .build();
        // Build a GoogleSignInClient with the options specified by gso.
        mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
    }

2、登录

/**
     * google登录
     */
    private void login() {
        //使用GoogleSignIn.getLastSignedInAccount方法为当前登录的用户请求个人资料信息。
        GoogleSignInAccount account = GoogleSignIn.getLastSignedInAccount(this);
        //不存在则请求登录
        if (account == null) {
            Intent signInIntent = mGoogleSignInClient.getSignInIntent();
            mActivityLauncher.launch(signInIntent);
        } else {
            showAccount(account);
        }
    }

    private final ActivityResultLauncher<Intent> mActivityLauncher = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), result -> {
        if (result.getResultCode() == RESULT_OK) {
            //回调成功
            Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(result.getData());
            handleSignInResult(task);
        }
    });

    /**
     * 处理数据
     *
     * @param completedTask
     */
    private void handleSignInResult(Task<GoogleSignInAccount> completedTask) {
        try {
            GoogleSignInAccount account = completedTask.getResult(ApiException.class);

            // Signed in successfully, show authenticated UI.
            showAccount(account);
        } catch (ApiException e) {
            // The ApiException status code indicates the detailed failure reason.
            // Please refer to the GoogleSignInStatusCodes class reference for more information.
            Log.e(TAG, "signInResult:failed code=" + e.getStatusCode());
            Log.e(TAG, "signInResult:failed msg=" + e.getStatusMessage());
        }
    }

    /**
     * 展示账户信息
     *
     * @param account
     */
    private void showAccount(GoogleSignInAccount account) {
        Log.e(TAG, "signInResult:success name:" + account.getDisplayName());
        Log.e(TAG, "signInResult:success id:" + account.getId());
        Log.e(TAG, "signInResult:success email:" + account.getEmail());
        Log.e(TAG, "signInResult:success token:" + account.getIdToken());
}

3、 登出

/**
     * 登出
     */
    private void logout() {
        mGoogleSignInClient.signOut()
                .addOnCompleteListener(this, new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {
                        Log.e(TAG, "退出登录");
                    }
                });
    }

4、断开账户

/**
     * 断开账户，撤销访问（如果用户删除其帐户，则必须删除您的应用程序从Google API获取的信息）。
     */
    private void revokeAccess() {
        mGoogleSignInClient.revokeAccess()
                .addOnCompleteListener(this, new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {
                        Log.e(TAG, "断开账户");
                    }
                });
    }

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参考：https://blog.csdn.net/liuxiaopang520/article/details/125508701