firebase在以下行中抛出 ConcurrentModificationException
FirebaseInstanceId.getInstance().getInstanceId().addOnSuccessListener()
使用gradle实现
implementation 'com.google.firebase:firebase-core:16.0.6'
完整的堆栈跟踪是
Caused by java.util.ConcurrentModificationException
at android.support.v4.util.SimpleArrayMap.put(SimpleArrayMap.java:461)
at com.google.android.gms.common.api.internal.zzc.addCallback(Unknown Source:20)
at com.google.android.gms.tasks.zzu$zza.(Unknown Source:9)
at com.google.android.gms.tasks.zzu$zza.zza(Unknown Source:4)
at com.google.android.gms.tasks.zzu.addOnSuccessListener(Unknown Source:36)
at com.<package_name>.Activity.MainActivity.onCreate(MainActivity.java:158)
at android.app.Activity.performCreate(Activity.java:6982)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2811)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2933)
at android.app.ActivityThread.-wrap11(Unknown Source)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1612)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6710)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:770)
1 回答
如果您希望将Firebase库集成到自己的项目中,则需要执行一些基本任务来准备Android Studio项目 . 您可能已将此操作作为向应用添加Firebase的一部分 .
首先,将规则添加到根级build.gradle文件中,以包含google-services插件和Google的Maven存储库:
然后,在您的模块Gradle文件(通常是app / build.gradle)中,添加文件底部的apply plugin行以启用Gradle插件: