我制作了包括Firebase身份验证在内的应用程序基本版本,在将应用程序与Firebase连接之前,我已经在Android仿真器中测试了该应用程序。我收到以下错误,然后我自己修复了一些问题。
-连接
firebase-添加依赖项
classpath 'com.google.gms:google-services:4.2.0'
仍然遇到以下错误-
/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.bottomnav, PID: 2049
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.bottomnav/com.example.bottomnav.login}: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.example.bottomnav. Make sure to call FirebaseApp.initializeApp(Context) first.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3449)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3601)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7656)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
Caused by: java.lang.IllegalStateException: Default FirebaseApp is not initialized in this process com.example.bottomnav. Make sure to call FirebaseApp.initializeApp(Context) first.
at com.google.firebase.FirebaseApp.getInstance(com.google.firebase:firebase-common@@19.3.0:184)
at com.google.firebase.auth.FirebaseAuth.getInstance(com.google.firebase:firebase-auth@@19.3.1:1)
at com.example.bottomnav.login.onCreate(login.java:40)
at android.app.Activity.performCreate(Activity.java:8000)
at android.app.Activity.performCreate(Activity.java:7984)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3422)
我在较早的项目中使用过Firebase工具,但给人的印象是,使用Android Studio中的内置firebase工具会自动完成所有操作。那么,我有没有跳过任何步骤?
您可能没有将google-services插件添加到build.gradle中。这不仅仅是一个依赖。根据文档,还必须添加:
apply plugin: 'com.google.gms.google-services'
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我来说两句