Android 集成开发google登录

这是我参与新手入门的第2篇文章

背景

项目在要Google Play上架,并支持全球下载,加了google登录

一.准备

google登录集成地址

在google登录中创建并配置项目:console.developers.google.com 在控制面板选择Credentials → New Project,会提示创建项目名称和组织名称,如下图

2. 创建项目成功后开始创建OAuth client ID 应用类型选择为Android

根据系统提示,名称, packageName以及SHA-1值获取SHA-1值的方式: keytool -keystore path-to-debug-or-production-keystore -list -v

创建成功后会生成一个Client ID 一定要保存好,集成的时候要用

PS: 如果是通过集成文档创建成功的,会提示下载credentials.json文件,一定要下,不然可能会坑

二.集成开发

PS: google登录需要运行在Android 4.1及以上且Google Play 服务 15.0.0及以上版本

把刚才下载的credentials.json文件放入app路径的根目录
检查项目顶级build.gradle中包含Maven库

allprojects {
    repositories {
        google()

        // If you're using a version of Gradle lower than 4.1, you must instead use:
        // maven {
        //     url 'https://maven.google.com'
        // }
    }
}

在app的build.gradle中引用google play服务

dependencies {
        implementation 'com.google.android.gms:play-services-auth:19.0.0'
   }

添加登录

配置 Google Sign-in 和 GoogleSignInClient 对象

var mGoogleSignInClient: GoogleSignInClient? = null
private fun initGoogle() {
        val gso = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
            .requestIdToken(CommonConstants.GOOGLE_CLIENT_ID)
            .requestEmail()
            .build()
        mGoogleSignInClient = GoogleSignIn.getClient(requireActivity(), gso)
    }

CommonConstants.GOOGLE_CLIENT_ID 为创建项目成功后的Client ID

调起登录

private fun signIn() {
        val signInIntent: Intent = mGoogleSignInClient?.signInIntent!!
        startActivityForResult(signInIntent, RC_SIGN_IN)
    }

在onActivityResult中接收消息

    private val RC_SIGN_IN: Int = 3000
    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if (requestCode == RC_SIGN_IN) {
            // The Task returned from this call is always completed, no need to attach
            // a listener.
            val task: Task<GoogleSignInAccount> = GoogleSignIn.getSignedInAccountFromIntent(data)
            handleSignInResult(task)
        }
        super.onActivityResult(requestCode, resultCode, data)
    }
    
    private fun handleSignInResult(completedTask: Task<GoogleSignInAccount>) {
        try {
            val account = completedTask.getResult(ApiException::class.java)
            // Signed in successfully, show authenticated UI.
            Log.e("handleSignInResult", account.toString())
            Log.e("handleSignInResult_displayName", account?.displayName!!)
            Log.e("handleSignInResult_email", account?.email!!)
            Log.e("handleSignInResult_familyName", account?.familyName!!)
            Log.e("handleSignInResult_givenName", account?.givenName!!)
            Log.e("handleSignInResult_id", account?.id!!)
            Log.e("handleSignInResult_idToken", account?.idToken!!)
            Log.e("handleSignInResult_isExpired", account?.isExpired.toString())
            Log.e("handleSignInResult_photoUrl", account?.photoUrl.toString())
        } catch (e: ApiException) {
            // The ApiException status code indicates the detailed failure reason.
            // Please refer to the GoogleSignInStatusCodes class reference for more information.
            Log.e("handleSignInResult", "signInResult:failed code=" + e.statusCode)
        }
    }

检查现有用户是否登录

 val account = GoogleSignIn.getLastSignedInAccount(activity)
 updateUI(account);

退出登录

val gso = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
                    .requestIdToken(CommonConstants.GOOGLE_CLIENT_ID)
                    .requestEmail()
                    .build()
                val mGoogleSignInClient = GoogleSignIn.getClient(activity, gso)
                mGoogleSignInClient.signOut().addOnCompleteListener(activity) {  }

拿到token信息后发送至自己的服务进行校验,至此google登录完成