Classifier does not have a companion object, and thus must be initialized here
Maybe this question is asked but not getting clue from the solutions which can be applied on my code.
The situation is:
I have an Activity where an interface is declared and I have a ViewModel class which has override interface and want to invoke the method of interface from Activity to make changes in ViewModel class but unable to call method in Activity saying ViewModel class does not have a companion object, and thus must be initialized here. How to resolve this?
var selection: setSelectionSubRow? = null
selection=RowSubTShirtViewModel
selection!!.setNameSelection(false)
above code is in Activity whose name is TShirtActivity.
below code is from RowViewModel class
class RowSubTShirtViewModel(private val subTShirtAdapter: SubTShirtAdapter, val context: TShirtActivity,
val tShirtBean: CommonItemBean, private val parentPosition: Int, private val position: Int) : BaseObservable() ,TShirtActivity.setSelectionSubRow{
fun getImageDrawable(): Drawable {
return if (tShirtBean.isSelected)
ContextCompat.getDrawable(context, R.drawable.green_border_circle)!!
else
ContextCompat.getDrawable(context, R.drawable.border_circle)!!
}
override fun setNameSelection(selection: Boolean) {
if (parentPosition == 6) {
if (position == 1) {
tShirtBean.isSelected = false
}
}
}
android kotlin interface asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
add a comment |
Maybe this question is asked but not getting clue from the solutions which can be applied on my code.
The situation is:
I have an Activity where an interface is declared and I have a ViewModel class which has override interface and want to invoke the method of interface from Activity to make changes in ViewModel class but unable to call method in Activity saying ViewModel class does not have a companion object, and thus must be initialized here. How to resolve this?
var selection: setSelectionSubRow? = null
selection=RowSubTShirtViewModel
selection!!.setNameSelection(false)
above code is in Activity whose name is TShirtActivity.
below code is from RowViewModel class
class RowSubTShirtViewModel(private val subTShirtAdapter: SubTShirtAdapter, val context: TShirtActivity,
val tShirtBean: CommonItemBean, private val parentPosition: Int, private val position: Int) : BaseObservable() ,TShirtActivity.setSelectionSubRow{
fun getImageDrawable(): Drawable {
return if (tShirtBean.isSelected)
ContextCompat.getDrawable(context, R.drawable.green_border_circle)!!
else
ContextCompat.getDrawable(context, R.drawable.border_circle)!!
}
override fun setNameSelection(selection: Boolean) {
if (parentPosition == 6) {
if (position == 1) {
tShirtBean.isSelected = false
}
}
}
asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
add a comment |
Maybe this question is asked but not getting clue from the solutions which can be applied on my code.
The situation is:
I have an Activity where an interface is declared and I have a ViewModel class which has override interface and want to invoke the method of interface from Activity to make changes in ViewModel class but unable to call method in Activity saying ViewModel class does not have a companion object, and thus must be initialized here. How to resolve this?
var selection: setSelectionSubRow? = null
selection=RowSubTShirtViewModel
selection!!.setNameSelection(false)
above code is in Activity whose name is TShirtActivity.
below code is from RowViewModel class
class RowSubTShirtViewModel(private val subTShirtAdapter: SubTShirtAdapter, val context: TShirtActivity,
val tShirtBean: CommonItemBean, private val parentPosition: Int, private val position: Int) : BaseObservable() ,TShirtActivity.setSelectionSubRow{
fun getImageDrawable(): Drawable {
return if (tShirtBean.isSelected)
ContextCompat.getDrawable(context, R.drawable.green_border_circle)!!
else
ContextCompat.getDrawable(context, R.drawable.border_circle)!!
}
override fun setNameSelection(selection: Boolean) {
if (parentPosition == 6) {
if (position == 1) {
tShirtBean.isSelected = false
}
}
}
asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
Maybe this question is asked but not getting clue from the solutions which can be applied on my code.
The situation is:
I have an Activity where an interface is declared and I have a ViewModel class which has override interface and want to invoke the method of interface from Activity to make changes in ViewModel class but unable to call method in Activity saying ViewModel class does not have a companion object, and thus must be initialized here. How to resolve this?
var selection: setSelectionSubRow? = null
selection=RowSubTShirtViewModel
selection!!.setNameSelection(false)
above code is in Activity whose name is TShirtActivity.
below code is from RowViewModel class
class RowSubTShirtViewModel(private val subTShirtAdapter: SubTShirtAdapter, val context: TShirtActivity,
val tShirtBean: CommonItemBean, private val parentPosition: Int, private val position: Int) : BaseObservable() ,TShirtActivity.setSelectionSubRow{
fun getImageDrawable(): Drawable {
return if (tShirtBean.isSelected)
ContextCompat.getDrawable(context, R.drawable.green_border_circle)!!
else
ContextCompat.getDrawable(context, R.drawable.border_circle)!!
}
override fun setNameSelection(selection: Boolean) {
if (parentPosition == 6) {
if (position == 1) {
tShirtBean.isSelected = false
}
}
}
asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
edited Nov 26 '18 at 7:08
Farhana
asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
asked Nov 26 '18 at 6:28
FarhanaFarhana
2,68552335
2,68552335
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
This line selection=RowSubTShirtViewModel references the view model as if it were a named object, meaning you would have written instead of class object:
object RowSubTShirtViewModel {
//...
}
However, since that's not the case, kotlin is telling you that you cannot reference it like that and must initialize it. The conductor as quite a lot of parameters for me to guess what they are, but essentially you'd have to pass them in:
selection=RowSubTShirtViewModel(/*parameters here*/)
answered Nov 26 '18 at 7:21
FredFred
8,79012645
I got your point. but other problems have to face, Actually thisRowSubTShirtViewModelis aviewmodelofsubAdapterclass and it is using inViewModelclass ofActivityand there is adialoginactivity, indialogon button click I want to reverse selection ofRecycleViewitem and theRowSubTShirtViewModelis aviewModelfor the adpater of thatrecyclerview, so how can i manage constructor ofRowSubTShirtViewModelinAcitivty
– Farhana
Nov 26 '18 at 7:29
1
That's just a classic dependency problem. You just carry on passing everything until you have all you need. For example, if you constructRowSubTShirtViewModelin the adapter, which is used in an activity, then you can pass the activity as you instantiate the adapter and then pass it in as you instantiateRowSubTShirtViewModel. There are other approaches using dependency injection frameworks like Dagger. I can't really tell you what suits you best, but the problem you're having will always lead to having to buildRowSubTShirtViewModel.
– Fred
Nov 26 '18 at 9:09
Thanks Fred I will look both the solutions.
– Farhana
Nov 26 '18 at 9:11
add a comment |
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1 Answer
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votes
This line selection=RowSubTShirtViewModel references the view model as if it were a named object, meaning you would have written instead of class object:
object RowSubTShirtViewModel {
//...
}
However, since that's not the case, kotlin is telling you that you cannot reference it like that and must initialize it. The conductor as quite a lot of parameters for me to guess what they are, but essentially you'd have to pass them in:
selection=RowSubTShirtViewModel(/*parameters here*/)
answered Nov 26 '18 at 7:21
FredFred
8,79012645
I got your point. but other problems have to face, Actually thisRowSubTShirtViewModelis aviewmodelofsubAdapterclass and it is using inViewModelclass ofActivityand there is adialoginactivity, indialogon button click I want to reverse selection ofRecycleViewitem and theRowSubTShirtViewModelis aviewModelfor the adpater of thatrecyclerview, so how can i manage constructor ofRowSubTShirtViewModelinAcitivty
– Farhana
Nov 26 '18 at 7:29
1
That's just a classic dependency problem. You just carry on passing everything until you have all you need. For example, if you constructRowSubTShirtViewModelin the adapter, which is used in an activity, then you can pass the activity as you instantiate the adapter and then pass it in as you instantiateRowSubTShirtViewModel. There are other approaches using dependency injection frameworks like Dagger. I can't really tell you what suits you best, but the problem you're having will always lead to having to buildRowSubTShirtViewModel.
– Fred
Nov 26 '18 at 9:09
Thanks Fred I will look both the solutions.
– Farhana
Nov 26 '18 at 9:11
add a comment |
This line selection=RowSubTShirtViewModel references the view model as if it were a named object, meaning you would have written instead of class object:
object RowSubTShirtViewModel {
//...
}
However, since that's not the case, kotlin is telling you that you cannot reference it like that and must initialize it. The conductor as quite a lot of parameters for me to guess what they are, but essentially you'd have to pass them in:
selection=RowSubTShirtViewModel(/*parameters here*/)
answered Nov 26 '18 at 7:21
FredFred
8,79012645
I got your point. but other problems have to face, Actually thisRowSubTShirtViewModelis aviewmodelofsubAdapterclass and it is using inViewModelclass ofActivityand there is adialoginactivity, indialogon button click I want to reverse selection ofRecycleViewitem and theRowSubTShirtViewModelis aviewModelfor the adpater of thatrecyclerview, so how can i manage constructor ofRowSubTShirtViewModelinAcitivty
– Farhana
Nov 26 '18 at 7:29
1
That's just a classic dependency problem. You just carry on passing everything until you have all you need. For example, if you constructRowSubTShirtViewModelin the adapter, which is used in an activity, then you can pass the activity as you instantiate the adapter and then pass it in as you instantiateRowSubTShirtViewModel. There are other approaches using dependency injection frameworks like Dagger. I can't really tell you what suits you best, but the problem you're having will always lead to having to buildRowSubTShirtViewModel.
– Fred
Nov 26 '18 at 9:09
Thanks Fred I will look both the solutions.
– Farhana
Nov 26 '18 at 9:11
add a comment |
This line selection=RowSubTShirtViewModel references the view model as if it were a named object, meaning you would have written instead of class object:
object RowSubTShirtViewModel {
//...
}
However, since that's not the case, kotlin is telling you that you cannot reference it like that and must initialize it. The conductor as quite a lot of parameters for me to guess what they are, but essentially you'd have to pass them in:
selection=RowSubTShirtViewModel(/*parameters here*/)
answered Nov 26 '18 at 7:21
FredFred
8,79012645
This line selection=RowSubTShirtViewModel references the view model as if it were a named object, meaning you would have written instead of class object:
object RowSubTShirtViewModel {
//...
}
However, since that's not the case, kotlin is telling you that you cannot reference it like that and must initialize it. The conductor as quite a lot of parameters for me to guess what they are, but essentially you'd have to pass them in:
selection=RowSubTShirtViewModel(/*parameters here*/)
answered Nov 26 '18 at 7:21
FredFred
8,79012645
answered Nov 26 '18 at 7:21
FredFred
8,79012645
answered Nov 26 '18 at 7:21
FredFred
8,79012645
answered Nov 26 '18 at 7:21
FredFred
8,79012645
8,79012645
I got your point. but other problems have to face, Actually thisRowSubTShirtViewModelis aviewmodelofsubAdapterclass and it is using inViewModelclass ofActivityand there is adialoginactivity, indialogon button click I want to reverse selection ofRecycleViewitem and theRowSubTShirtViewModelis aviewModelfor the adpater of thatrecyclerview, so how can i manage constructor ofRowSubTShirtViewModelinAcitivty
– Farhana
Nov 26 '18 at 7:29
1
That's just a classic dependency problem. You just carry on passing everything until you have all you need. For example, if you constructRowSubTShirtViewModelin the adapter, which is used in an activity, then you can pass the activity as you instantiate the adapter and then pass it in as you instantiateRowSubTShirtViewModel. There are other approaches using dependency injection frameworks like Dagger. I can't really tell you what suits you best, but the problem you're having will always lead to having to buildRowSubTShirtViewModel.
– Fred
Nov 26 '18 at 9:09
Thanks Fred I will look both the solutions.
– Farhana
Nov 26 '18 at 9:11
add a comment |
I got your point. but other problems have to face, Actually thisRowSubTShirtViewModelis aviewmodelofsubAdapterclass and it is using inViewModelclass ofActivityand there is adialoginactivity, indialogon button click I want to reverse selection ofRecycleViewitem and theRowSubTShirtViewModelis aviewModelfor the adpater of thatrecyclerview, so how can i manage constructor ofRowSubTShirtViewModelinAcitivty
– Farhana
Nov 26 '18 at 7:29
1
That's just a classic dependency problem. You just carry on passing everything until you have all you need. For example, if you constructRowSubTShirtViewModelin the adapter, which is used in an activity, then you can pass the activity as you instantiate the adapter and then pass it in as you instantiateRowSubTShirtViewModel. There are other approaches using dependency injection frameworks like Dagger. I can't really tell you what suits you best, but the problem you're having will always lead to having to buildRowSubTShirtViewModel.
– Fred
Nov 26 '18 at 9:09
Thanks Fred I will look both the solutions.
– Farhana
Nov 26 '18 at 9:11
I got your point. but other problems have to face, Actually this
RowSubTShirtViewModel is a viewmodel of subAdapter class and it is using in ViewModel class of Activity and there is a dialog in activity, in dialog on button click I want to reverse selection of RecycleView item and the RowSubTShirtViewModel is a viewModel for the adpater of that recyclerview, so how can i manage constructor of RowSubTShirtViewModel in Acitivty– Farhana
Nov 26 '18 at 7:29
I got your point. but other problems have to face, Actually this
RowSubTShirtViewModel is a viewmodel of subAdapter class and it is using in ViewModel class of Activity and there is a dialog in activity, in dialog on button click I want to reverse selection of RecycleView item and the RowSubTShirtViewModel is a viewModel for the adpater of that recyclerview, so how can i manage constructor of RowSubTShirtViewModel in Acitivty– Farhana
Nov 26 '18 at 7:29
1
1
That's just a classic dependency problem. You just carry on passing everything until you have all you need. For example, if you construct
RowSubTShirtViewModel in the adapter, which is used in an activity, then you can pass the activity as you instantiate the adapter and then pass it in as you instantiate RowSubTShirtViewModel. There are other approaches using dependency injection frameworks like Dagger. I can't really tell you what suits you best, but the problem you're having will always lead to having to build RowSubTShirtViewModel.– Fred
Nov 26 '18 at 9:09
That's just a classic dependency problem. You just carry on passing everything until you have all you need. For example, if you construct
RowSubTShirtViewModel in the adapter, which is used in an activity, then you can pass the activity as you instantiate the adapter and then pass it in as you instantiate RowSubTShirtViewModel. There are other approaches using dependency injection frameworks like Dagger. I can't really tell you what suits you best, but the problem you're having will always lead to having to build RowSubTShirtViewModel.– Fred
Nov 26 '18 at 9:09
Thanks Fred I will look both the solutions.
– Farhana
Nov 26 '18 at 9:11
Thanks Fred I will look both the solutions.
– Farhana
Nov 26 '18 at 9:11
add a comment |
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