【问题标题】：Firebase Authentication - Initializing Multiple Projects (FirebaseUiException: Code 10)Firebase 身份验证 - 初始化多个项目（FirebaseUiException：代码 10）
【发布时间】：2019-07-31 00:55:53
【问题描述】：

预期

为Coinverse Android 应用初始化多个 Firebase 项目，以允许用户下载此StackOverflow answer 中所述的开源GitHub 项目。
允许用户设置自己的 Firebase 项目进行身份验证
运行应用程序的 open 构建变体并使用 Firebase 登录 AuthUI
为共享的 Firestore 和 Cloud Functions 启用第二个预设 Firebase 项目

观察到

一个 Firebase 项目的身份验证有效，初始化第二个项目时在下面抛出错误

 fun initialize(context: Context) {
    if (BuildConfig.BUILD_TYPE == open.name)
        FirebaseApp.initializeApp(
                context,
                FirebaseOptions.Builder()
                        .setApplicationId(APP_ID_OPEN)
                        .setApiKey(APP_API_KEY_OPEN)
                        .setDatabaseUrl(DATABASE_URL_OPEN)
                        .setProjectId(PROJECT_ID_OPEN)
                        .setStorageBucket(STORAGE_BUCKET_OPEN)
                        .build(),
                open.name)
    Firebase.setAndroidContext(context)
    initializeRemoteConfig()
}

匿名用户身份验证在初始化多个 Firebase 项目时起作用

初始化两个 Firebase 项目并尝试 Google 登录时出错。

登录失败 com.firebase.ui.auth.FirebaseUiException：代码：10，消息：10：

完整日志

2019-07-29 16:34:08.130 12406-12406/app.coinverse.open E/AuthUI: A sign-in error occurred.
com.firebase.ui.auth.FirebaseUiException: Code: 10, message: 10: 
    at com.firebase.ui.auth.data.remote.GoogleSignInHandler.onActivityResult(GoogleSignInHandler.java:109)
    at com.firebase.ui.auth.ui.idp.SingleSignInActivity.onActivityResult(SingleSignInActivity.java:128)
    at android.app.Activity.dispatchActivityResult(Activity.java:7462)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:4391)
    at android.app.ActivityThread.handleSendResult(ActivityThread.java:4440)
    at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6718)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-07-29 16:34:08.134 12406-12406/app.coinverse.open E/AuthUI: A sign-in error occurred.
com.firebase.ui.auth.FirebaseUiException: Code: 10, message: 10: 
    at com.firebase.ui.auth.data.remote.GoogleSignInHandler.onActivityResult(GoogleSignInHandler.java:109)
    at com.firebase.ui.auth.ui.idp.SingleSignInActivity.onActivityResult(SingleSignInActivity.java:128)
    at android.app.Activity.dispatchActivityResult(Activity.java:7462)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:4391)
    at android.app.ActivityThread.handleSendResult(ActivityThread.java:4440)
    at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6718)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-07-29 16:34:08.211 12406-12406/app.coinverse.open E/AuthUI: A sign-in error occurred.
com.firebase.ui.auth.FirebaseUiException: Code: 10, message: 10: 
    at com.firebase.ui.auth.data.remote.GoogleSignInHandler.onActivityResult(GoogleSignInHandler.java:109)
    at com.firebase.ui.auth.ui.idp.SingleSignInActivity.onActivityResult(SingleSignInActivity.java:128)
    at android.app.Activity.dispatchActivityResult(Activity.java:7462)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:4391)
    at android.app.ActivityThread.handleSendResult(ActivityThread.java:4440)
    at android.app.servertransaction.ActivityResultItem.execute(ActivityResultItem.java:49)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1816)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6718)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
2019-07-29 16:34:08.261 12406-12406/app.coinverse.open E/SignInDialogFragment: Sign in fail com.firebase.ui.auth.FirebaseUiException: Code: 10, message: 10:

实施

MainActivity

if (BuildConfig.BUILD_TYPE == open.name) {
        //Configures user's Firebase project.
        FirebaseApp.initializeApp(
                context,
                FirebaseOptions.Builder()
                        .setApplicationId(APP_ID_OPEN_PRIVATE)
                        .setApiKey(APP_API_KEY_OPEN_PRIVATE)
                        .setDatabaseUrl(DATABASE_URL_OPEN_PRIVATE)
                        .setProjectId(PROJECT_ID_OPEN_PRIVATE)
                        .build(),
                OPEN_PRIVATE)
        //Configures shared pre-set Firebase project.
        FirebaseApp.initializeApp(
                context,
                FirebaseOptions.Builder()
                        .setApplicationId(APP_ID_OPEN_SHARED)
                        .setApiKey(APP_API_KEY_OPEN_SHARED)
                        .setDatabaseUrl(DATABASE_URL_OPEN_SHARED)
                        .setProjectId(PROJECT_ID_OPEN)
                        .setStorageBucket(STORAGE_BUCKET_OPEN_SHARED)
                        .build(),
                open.name)
    }
    Firebase.setAndroidContext(context)
    initializeRemoteConfig()
}
// If build type is not 'open' configures Firebase Project from google-services.json in 'debug' src set.

SignInFragment

//Returns the relevant Firebase project.
fun firebaseApp(isOpenPrivateUser: Boolean)=
    if (BuildConfig.BUILD_TYPE != open.name) FirebaseApp.getInstance()
    else if (BuildConfig.BUILD_TYPE == open.name && isOpenPrivateUser)
            FirebaseApp.getInstance(OPEN_PRIVATE)
    else FirebaseApp.getInstance(open.name)

confirm.setOnClickListener {
    startActivityForResult(
        AuthUI.getInstance(firebaseApp(true)).createSignInIntentBuilder()
                .setAvailableProviders(listOf(AuthUI.IdpConfig.GoogleBuilder().build()))
                .build(),
            RC_SIGN_IN)
    }

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
    super.onActivityResult(requestCode, resultCode, data)
    if (requestCode == RC_SIGN_IN)
        if (resultCode == Activity.RESULT_OK) {
            homeViewModel.setUser(getInstance().currentUser)
            dismiss()
        } else {
            Log.e(LOG_TAG, "Sign in fail ${IdpResponse.fromResultIntent(data)?.error}")
        }
}

【问题讨论】：

标签： android authentication kotlin firebase-authentication firebaseui

【解决方案1】：

解决方案

问题 1

每个包只能与一个SHA-1 键相关联。使用 SHA-1 键删除其他 Firebase 项目并将共享 Firebase 项目恢复到其原始状态时，控制台提供了以下错误，表明存在问题。

An OAuth2 client already exists for this package name and SHA-1 in another project

此错误消息最初并未显示，如果第一次在具有相同 Android 包名称的 Firebase 项目中检测到相同的 SHA-1 键，这将很有用。

解决方案

从具有相同包名的任何其他 Firebase 项目中移除 SHA-1 键。在 Android 应用程序中使用两个 Firebase 项目时，它们不能使用相同的 SHA-1 键。

问题 2

默认的 Firebase 项目不是从第二个新创建的项目中的 google-services.json 生成的。

解决方案

在 Build > Rebuild Project 下在 Android Studio 中重建项目

【讨论】：