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我正在尝试在应用程序中实现架构组件,但我在创建androidViewModel实例时面临一个问题.请帮我解决这个问题.

这里我试图创建一个LoginViewModel类的实例,但得到下面提到的错误

错误

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.addonitservices.uphaar, PID: 22975
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.addonitservices.uphaar/com.addonitservices.uphaar.login.LoginActivity}: java.lang.RuntimeException: Cannot create an instance of class com.addonitservices.uphaar.login.LoginViewModel
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2778)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856)
        at android.app.ActivityThread.-wrap11(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1589)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
     Caused by: java.lang.RuntimeException: Cannot create an instance of class com.addonitservices.uphaar.login.LoginViewModel
        at android.arch.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.java:201)
        at android.arch.lifecycle.ViewModelProvider.get(ViewModelProvider.java:134)
        at android.arch.lifecycle.ViewModelProvider.get(ViewModelProvider.java:102)
        at com.addonitservices.uphaar.login.LoginActivity.initViewModel(LoginActivity.kt:27)
        at com.addonitservices.uphaar.login.LoginActivity.onCreate(LoginActivity.kt:22)
        at android.app.Activity.performCreate(Activity.java:6999)
        at android.app.Activity.performCreate(Activity.java:6990)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2731)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2856) 
        at android.app.ActivityThread.-wrap11(Unknown Source:0) …