How to get Position & View information through onclick Binding Adapter implemented with ViewModel? - mvvm

Question

I want to use Data Binding Library & ViewModel
to identify position of clicked item in List.
To know on which view the click happened so that I can trigger different Intent.
Here is my XML file (Currently onclick is on RelativeLayout)
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android">
<data>
<variable name="orgmembvm"
type="com.support.android.designlibdemo.include.OrgMemb" />
<variable name="orgmembhandlers"
type="com.support.android.designlibdemo.View.MyOrgMembHandlers"/>
</data>
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp">
<RelativeLayout
android:id="#+id/org_memb_rec"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:onClick="#{orgmembhandlers::onClickOpenEditRec}"
android:padding="8dp">
//Inner Child element
</RelativeLayout>
BindViewHolder of Adaptor
#Override
public void onBindViewHolder(#NonNull OrgMembViewHolder holder, int
position) {
holder.mBinding.setOrgmembvm(orgMembArrayList.get(position));
holder.mBinding.setOrgmembhandlers(new MyOrgMembHandlers());
holder.mBinding.executePendingBindings();
}
Code in Activity Class for getting viewModel attached to Activity.
#Override
protected void onCreate(Bundle savedInstanceState) {
......
......
userModel = ViewModelProviders.of(this).get(OrgMembViewModel.class);
userModel.getAllLive().observe(this, orgMembList -> {
mAdapter.updateorgmemblist(orgMembList);
});
}
How can this be achieved?

Answer 1

1. Take position variable in layout
<variable
name="position"
type="int"/>
2. set position from adapter
#Override
public void onBindViewHolder(#NonNull OrgMembViewHolder holder, int position) {
holder.mBinding.setPosition(position);
}
3. Put int position in onClickOpenEditRec param
public class MyOrgMembHandler {
public void onClickOpenEditRec(int position) {
}
}
4. Pass position from layout
android:onClick="#{()->orgmembhandlers.onClickOpenEditRec(position)}"
Check this answer to see ways of setting click in data binding.