针对 Android 和 Firebase 的问题排查及常见问题解答
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本页针对在使用 Firebase 时可能会遇到的特定于 Android 的问题提供提示和问题排查方法。
还有其他难题,或是您的问题未在下面列出?请查看Firebase 的主要常见问题解答,详细了解针对整个 Firebase 以及特定产品的常见问题解答。
您还可以查看 Firebase Android SDK GitHub 代码库,获取已报告问题和问题排查的最新列表。同时,我们也鼓励您提交与 Firebase Android SDK 相关的问题。
我收到一条错误消息,指出 ktx
库无法解析或找不到。
出现此错误的原因很可能是您使用了 Firebase BoM 并将 KTX 模块指定为产品库依赖项。
2025 年 7 月,我们停止发布 KTX 模块的新版本,并从 Firebase Android BoM (v34.0.0) 中移除了 KTX 库。
如果您使用之前发布的 KTX 模块中的 KTX API,我们建议您迁移应用以改为使用主模块中的 KTX API。如需了解详情,请参阅关于此计划的常见问题解答。
我如何解决以下错误:“其他项目中已存在使用此软件包名称和 SHA-1 的 OAuth2 客户端”?
如果我们检测到其他 Firebase 或 Google Cloud 项目中存在使用您指定的软件包名称和 SHA-1 的 OAuth 2.0 客户端 ID,就会发送此错误消息。了解如何解决此错误。
将 Firebase 添加到我的 Android 项目中时,收到一条“找不到”错误消息。
此错误通常表示您的应用缺少对 Google Maven 代码库的一个或多个引用。请务必在 Gradle 配置文件中包含 Google 的 Maven 制品库 (google()
)。
- 如果您的项目使用的是
plugins
语法,请将其添加到 settings.gradle.kts
或 settings.gradle
文件的 plugins
部分中。
- 如果您的项目使用的是
buildscript
语法,请将其添加到项目级 build.gradle.kts
或 build.gradle
文件的 buildscript
和 allprojects
部分中。
将 Firebase SDK 添加到我的 Android 项目时,我收到了关于调用自定义支持和启用脱糖的错误消息。
2021 年 5 月 (Firebase BoM v28.0.0),Firebase 停用了其所有 Android 库的脱糖(请参阅版本说明)。
这项变化意味着使用 Android Gradle 插件 (AGP) v4.2 或更早版本的 Gradle 构建需要启用 Java 8 支持。否则,添加 Firebase SDK 时,这些 Android 项目将遇到以下构建失败问题:
D8: Invoke-customs are only supported starting with Android O (--min-api 26)
Caused by: com.android.builder.dexing.DexArchiveBuilderException: Error while dexing.
The dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle
android {
compileOptions {
sourceCompatibility 1.8
targetCompatibility 1.8
}
}
See https://developer.android.com/studio/write/java8-support.html for details.
Alternatively, increase the minSdkVersion to 26 or above.
为解决此构建失败问题,您可以采用以下两种方案中的一种:
- 将错误消息中列出的
compileOptions
添加到您的应用级 build.gradle.kts
或 build.gradle
文件中。
- 将 Android 项目的
minSdkVersion
提升到 26 或更高。
当我发布应用后,Google 登录显示错误“12500:”。如何解决此问题?
发生这种情况的原因可能有两种:您尚未提供支持电子邮件地址或缺少 SHA 密钥。如需修复此错误,请确保满足以下所有条件:
如何使用 buildscript
语法将 Firebase 插件添加到 Android 项目中?
Firebase 具有以下 Gradle 插件:
插件名称 |
Maven 坐标 |
最新版本 |
插件 ID |
Google Play 服务插件 |
com.google.gms:google-services |
4.4.3 |
com.google.gms.google-services |
App Distribution 插件 |
com.google.firebase:firebase-appdistribution-gradle |
5.1.1 |
com.google.firebase.appdistribution |
Crashlytics 插件 |
com.google.firebase:firebase-crashlytics-gradle |
3.0.6 |
com.google.firebase.crashlytics |
Performance Monitoring 插件 |
com.google.firebase:perf-plugin |
2.0.1 |
com.google.firebase.firebase-perf |
将 Firebase 插件添加到仍在使用 buildscript
语法的 Android 项目的方法如下:
在您的根级(项目级)Gradle 文件(<project>/build.gradle.kts
或 <project>/build.gradle
)中,使用 Maven 坐标将该插件添加为依赖项:
Kotlin
buildscript {
repositories {
// Make sure that you have the following two repositories
google() // Google's Maven repository
mavenCentral() // Maven Central repository
}
dependencies {
...
// Add the Maven coordinates and latest version of the plugin
classpath ("PLUGIN_MAVEN_COORDINATES:PLUGIN_VERSION")
}
}
allprojects {
...
repositories {
// Make sure that you have the following two repositories
google() // Google's Maven repository
mavenCentral() // Maven Central repository
}
}
Groovy
buildscript {
repositories {
// Make sure that you have the following two repositories
google() // Google's Maven repository
mavenCentral() // Maven Central repository
}
dependencies {
...
// Add the Maven coordinates and latest version of the plugin
classpath 'PLUGIN_MAVEN_COORDINATES:PLUGIN_VERSION'
}
}
allprojects {
...
repositories {
// Make sure that you have the following two repositories
google() // Google's Maven repository
mavenCentral() // Maven Central repository
}
}
在您的模块(应用级)Gradle 文件(通常是 <project>/<app-module>/build.gradle.kts
或 <project>/<app-module>/build.gradle
)中,使用插件 ID 添加该插件:
Kotlin
plugins {
id("com.android.application")
// Add the ID of the plugin
id("FIREBASE_PLUGIN_ID")
...
}
Groovy
plugins {
id 'com.android.application'
// Add the ID of the plugin
id 'FIREBASE_PLUGIN_ID'
...
}
如未另行说明,那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可,并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情,请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC):2025-08-12。
[null,null,["最后更新时间 (UTC):2025-08-12。"],[],[],null,["\u003cbr /\u003e\n\nThis page offers tips and troubleshooting for Android-specific issues\nthat you might encounter when using Firebase.\n\nHave other challenges or don't see your issue outlined below? Make sure to check\nout the [main Firebase FAQ](/support/faq) for more pan-Firebase or\nproduct-specific FAQ.\n\nYou can also check out the\n[Firebase Android SDK GitHub repo](https://github.com/firebase/firebase-android-sdk/issues)\nfor an up-to-date list of reported issues and troubleshooting. We encourage you\nto file your own Firebase Android SDK related issues there, too! \n\nI'm getting an error that the `ktx` library failed to resolve or\ncould not be found.\n\nThis error is likely because you're using the Firebase BoM and\nspecifying a KTX module as your product library dependency.\n\n**In July 2025, we stopped releasing new versions of the KTX modules,\nand we removed the KTX libraries from the Firebase Android BoM\n(v34.0.0).**\n\nIf you use KTX APIs from previously released KTX modules, we recommend\nthat you ***migrate your app to use KTX APIs from the main modules\ninstead*** . For details, see the\n[FAQ about this initiative](/docs/android/kotlin-migration). \n\nDo I need to provide a SHA-1 when adding an Android app to a Firebase\nproject?\n\n[SHA-1 information](//developers.google.com/android/guides/client-auth)\nis required by Firebase Authentication (when using\n[Google signin](/docs/auth/android/google-signin) or\n[phone number signin](/docs/auth/android/phone-auth)) and\n[Firebase Dynamic Links](/docs/dynamic-links). If you're not using\nthese features, you don't have to provide a SHA-1. \n\nHow do I resolve this error: \"An OAuth2 client already exists for this\npackage name and SHA-1 in another project\"?\n\nThis error occurs if we detect that another Firebase or Google Cloud\nproject contains an OAuth 2.0 client ID with the package name\nand SHA-1 that you specified. Learn how to\n[resolve this error](//support.google.com/firebase/answer/6401008). \n\nWhen I add Firebase to my Android project, I get a \"Could not find\" error.\n\nThis error usually means that your app is missing one or more references\nto Google's Maven repository. Make sure to include Google's Maven repository\n(`google()`) in your Gradle Configuration file.\n\n- If your project is using the `plugins` syntax, include it in the `plugins` section in your `settings.gradle.kts` or `settings.gradle` file.\n- If your project is using the `buildscript` syntax, include it in both the `buildscript` and `allprojects` sections in your project-level `build.gradle.kts` or `build.gradle` file.\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nWhen I add a Firebase SDK to my Android project, I get an error about\ninvoke-custom support and enabling desugaring.\n\n\u003cbr /\u003e\n\nIn May 2021 (Firebase BoM v28.0.0), Firebase disabled desugaring for all its\nAndroid libraries\n(see [release note](/support/release-notes/android#2021-05-11)).\n\nThis change means that Gradle builds that use Android Gradle plugin (AGP) v4.2\nor earlier need to enable Java 8 support. Otherwise, when adding a Firebase SDK,\nthese Android projects get the following build failure: \n\n```\nD8: Invoke-customs are only supported starting with Android O (--min-api 26)\nCaused by: com.android.builder.dexing.DexArchiveBuilderException: Error while dexing.\nThe dependency contains Java 8 bytecode. Please enable desugaring by adding the following to build.gradle\nandroid {\n compileOptions {\n sourceCompatibility 1.8\n targetCompatibility 1.8\n }\n}\nSee https://developer.android.com/studio/write/java8-support.html for details.\nAlternatively, increase the minSdkVersion to 26 or above.\n```\n\nTo fix this build failure, you can follow one of two options:\n\n- Add the listed `compileOptions` from the error message to your **app-level** `build.gradle.kts` or `build.gradle` file.\n- Increase the `minSdkVersion` for your Android project to 26 or above.\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nGoogle Sign-in is showing the error \"12500:\" after I released my app. How\ndo I fix it?\n\n\nThere are two possible reasons why this would happen: you haven't provided a\nsupport email or you're missing a SHA key. In order to fix this error, make\nsure **all** of these conditions are true:\n\n- You've added a support email to the [General Settings of your project](https://console.firebase.google.com/project/_/settings/general/) in the Firebase console.\n- You've added the [SHA-1 Certificate fingerprint from your release/production keystore](https://developers.google.com/android/guides/client-auth#using_keytool_on_the_certificate) to your Firebase Android App in the Firebase console (go to settings [**Project settings**](//console.firebase.google.com/project/_/settings/general/), scroll down to *Your apps*, and then select your Android App).\n- You've added the [SHA-1 Certificate fingerprint from the Google Play Console](https://developer.android.com/studio/publish/app-signing#api-providers) to your Firebase Android App in the Firebase console (go to settings [**Project settings**](//console.firebase.google.com/project/_/settings/general/), scroll down to *Your apps*, and then select your Android App).\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e\n\nHow to add Firebase plugins to an Android project using the `buildscript`\nsyntax?\n\n\u003cbr /\u003e\n\n| **Tip:** Consider [migrating from `buildscript` to `plugin` syntax](https://developer.android.com/build/migrate-to-kotlin-dsl#migrate-buildscript) as this allows Android Studio to perform code completion and provide other helpful suggestions.\n\nFirebase has the following Gradle plugins:\n\n| Plugin name | Maven coordinates | Latest version | Plugin ID |\n|-------------------------------|-------------------------------------------------------|----------------|---------------------------------------|\n| Google Play services plugin | `com.google.gms:google-services` | 4.4.3 | `com.google.gms.google-services` |\n| App Distribution plugin | `com.google.firebase:firebase-appdistribution-gradle` | 5.1.1 | `com.google.firebase.appdistribution` |\n| Crashlytics plugin | `com.google.firebase:firebase-crashlytics-gradle` | 3.0.6 | `com.google.firebase.crashlytics` |\n| Performance Monitoring plugin | `com.google.firebase:perf-plugin` | 2.0.1 | `com.google.firebase.firebase-perf` |\n\n\u003cbr /\u003e\n\nHere's how to add a Firebase plugin to an Android project that still uses the\n`buildscript` syntax:\n\n1. In your **root-level (project-level)** Gradle file\n (`\u003cproject\u003e/build.gradle.kts` or `\u003cproject\u003e/build.gradle`), add the plugin as\n a dependency using its Maven coordinates:\n\n Kotlin \n\n buildscript {\n\n repositories {\n // Make sure that you have the following two repositories\n google() // Google's Maven repository\n mavenCentral() // Maven Central repository\n }\n\n dependencies {\n ...\n\n // Add the Maven coordinates and latest version of the plugin\n classpath (\"\u003cvar translate=\"no\"\u003ePLUGIN_MAVEN_COORDINATES\u003c/var\u003e:\u003cvar translate=\"no\"\u003ePLUGIN_VERSION\u003c/var\u003e\")\n }\n }\n\n allprojects {\n ...\n\n repositories {\n // Make sure that you have the following two repositories\n google() // Google's Maven repository\n mavenCentral() // Maven Central repository\n }\n }\n\n Groovy \n\n buildscript {\n\n repositories {\n // Make sure that you have the following two repositories\n google() // Google's Maven repository\n mavenCentral() // Maven Central repository\n }\n\n dependencies {\n ...\n\n // Add the Maven coordinates and latest version of the plugin\n classpath '\u003cvar translate=\"no\"\u003ePLUGIN_MAVEN_COORDINATES\u003c/var\u003e:\u003cvar translate=\"no\"\u003ePLUGIN_VERSION\u003c/var\u003e'\n }\n }\n\n allprojects {\n ...\n\n repositories {\n // Make sure that you have the following two repositories\n google() // Google's Maven repository\n mavenCentral() // Maven Central repository\n }\n }\n\n2. In your **module (app-level)** Gradle file (usually\n `\u003cproject\u003e/\u003capp-module\u003e/build.gradle.kts` or\n `\u003cproject\u003e/\u003capp-module\u003e/build.gradle`), add the plugin using its\n plugin ID:\n\n Kotlin \n\n plugins {\n id(\"com.android.application\")\n\n // Add the ID of the plugin\n id(\"\u003cvar translate=\"no\"\u003eFIREBASE_PLUGIN_ID\u003c/var\u003e\")\n ...\n }\n\n Groovy \n\n plugins {\n id 'com.android.application'\n\n // Add the ID of the plugin\n id '\u003cvar translate=\"no\"\u003eFIREBASE_PLUGIN_ID\u003c/var\u003e'\n ...\n }\n\n\u003cbr /\u003e\n\n\u003cbr /\u003e"]]