小编azs*_*tco的帖子

我有一个连接到firebase.The问题的应用程序在设备上安装应用程序(在多个设备上工作)时.我读了很多的论坛,没有人works.I阅读在这里和这等on.Thanks!

错误在这里.

E/AndroidRuntime: FATAL EXCEPTION: main
              Process: com.dev.ptruck, PID: 8833
              java.lang.RuntimeException: Unable to get provider com.google.firebase.provider.FirebaseInitProvider: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.dev.ptruck-17.apk"],nativeLibraryDirectories=[/data/app-lib/com.dev.ptruck-17, /vendor/lib, /system/lib]]
                  at android.app.ActivityThread.installProvider(ActivityThread.java:5196)
                  at android.app.ActivityThread.installContentProviders(ActivityThread.java:4788)
                  at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4728)
                  at android.app.ActivityThread.access$1500(ActivityThread.java:166)
                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1343)
                  at android.os.Handler.dispatchMessage(Handler.java:102)
                  at android.os.Looper.loop(Looper.java:136)
                  at android.app.ActivityThread.main(ActivityThread.java:5584)
                  at java.lang.reflect.Method.invokeNative(Native Method)
                  at java.lang.reflect.Method.invoke(Method.java:515)
                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
                  at dalvik.system.NativeStart.main(Native Method)
               Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.firebase.provider.FirebaseInitProvider" on path: DexPathList[[zip file "/data/app/com.dev.ptruck-17.apk"],nativeLibraryDirectories=[/data/app-lib/com.dev.ptruck-17, /vendor/lib, /system/lib]]
                  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
                  at java.lang.ClassLoader.loadClass(ClassLoader.java:457) …

将Gradle更新为后com.android.tools.build:gradle:3.1.0,在日志中我现在看到:

文件夹E:\ WORK\App\car_android\carapp\build\generated\source\kaptKotlin\devRelease

第三方Gradle插件可能是原因

更新后Android Studio，以3.1.0和kotlin版本1.2.31，我有这个问题Observables。

someVm 值为空。

class ViewModel1(car: Car) : BaseObservable() {

    val someVm = ObservableField<ViewModel2>(ViewModel2(car))

    shipmentVm.get()!!
}

class ViewModel2(car: Car) : ItemViewModel() {

    val car= ObservableField(car)
}

open class ItemViewModel : BaseObservable() {

    val first = ObservableField(false)
    val last = ObservableField(false)
}

非常感谢！