I have checked these are the question and answer but still not getting solution Question 1, Question 2, Question 3, Question 4, Question 5, Question 6 and also checked some of the article.
This is my Factory class
class ContextViewModelFactory (private val context: Context) :
ViewModelProvider.AndroidViewModelFactory() {
override fun <T : ViewModel> create(modelClass: Class<T>): T {
if (modelClass.isAssignableFrom(LoginViewModel::class.java)) {
return LoginViewModel(context) as T
}
throw IllegalArgumentException("Unknown class name")
}
}
This is ViewModel class
class LoginViewModel (val context : Context) : ViewModel() {
var isTask = MutableLiveData<Boolean>()
}
This is Activity class
class ActivityLogin : BaseActivity() {
lateinit var binding: ActivityLoginBinding
lateinit var viewModel: LoginViewModel
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
binding = ActivityLoginBinding.inflate(layoutInflater)
setContentView(binding.root)
observer()
}
private fun initViewModel() {
viewModel = ViewModelProvider(this,
ContextViewModelFactory(this@ActivityLogin))[LoginViewModel::class.java]
binding.model = viewModel
binding.lifecycleOwner = this
}
}
I have tried so much but not solver, do some help that where I am doing something wrong, Thanks.
Below is the error log
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.vision.movies/com.vision.movies.view.ActivityLogin}: java.lang.RuntimeException: Cannot create an instance of class com.vision.movies.viewModel.LoginViewModel
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2861)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2943)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1630)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6626)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)
Caused by: java.lang.RuntimeException: Cannot create an instance of class com.vision.movies.viewModel.LoginViewModel
at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.kt:204)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.kt:322)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.kt:282)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.kt:187)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.kt:153)
at com.vision.movies.view.ActivityLogin.initViewModel(ActivityLogin.kt:29)
at com.vision.movies.view.ActivityLogin.onCreate(ActivityLogin.kt:23)
at android.app.Activity.performCreate(Activity.java:7032)
at android.app.Activity.performCreate(Activity.java:7023)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1236)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2814)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2943)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1630)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6626)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)
Caused by: java.lang.InstantiationException: java.lang.Class<com.vision.movies.viewModel.LoginViewModel> has no zero argument constructor
at java.lang.Class.newInstance(Native Method)
at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.kt:202)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.kt:322)
at androidx.lifecycle.ViewModelProvider$AndroidViewModelFactory.create(ViewModelProvider.kt:282)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.kt:187)
at androidx.lifecycle.ViewModelProvider.get(ViewModelProvider.kt:153)
at com.vision.movies.view.ActivityLogin.initViewModel(ActivityLogin.kt:29)
at com.vision.movies.view.ActivityLogin.onCreate(ActivityLogin.kt:23)
at android.app.Activity.performCreate(Activity.java:7032)
at android.app.Activity.performCreate(Activity.java:7023)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1236)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2814)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2943)
at android.app.ActivityThread.-wrap11(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1630)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6626)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:811)
Please use below code to initialize viewmodel.
viewModel = ViewModelProviders.of(this).get(LoginViewModel::class.java)
If it not works try below code
viewModel = ViewModelProvider(this, ViewModelProvider.AndroidViewModelFactory.getInstance(this.getApplication())).get(LoginViewModel::class.java)