I have created generic adapter for RecyclerView by using DataBinding. Here is small code snippet
public class RecyclerAdapter<T, VM extends ViewDataBinding> extends RecyclerView.Adapter<RecyclerAdapter.RecyclerViewHolder> {
private final Context context;
private ArrayList<T> items;
private int layoutId;
private RecyclerCallback<VM, T> bindingInterface;
public RecyclerAdapter(Context context, ArrayList<T> items, int layoutId, RecyclerCallback<VM, T> bindingInterface) {
this.items = items;
this.context = context;
this.layoutId = layoutId;
this.bindingInterface = bindingInterface;
}
public class RecyclerViewHolder extends RecyclerView.ViewHolder {
VM binding;
public RecyclerViewHolder(View view) {
super(view);
binding = DataBindingUtil.bind(view);
}
public void bindData(T model) {
bindingInterface.bindData(binding, model);
}
}
@Override
public RecyclerViewHolder onCreateViewHolder(ViewGroup parent,
int viewType) {
View v = LayoutInflater.from(parent.getContext())
.inflate(layoutId, parent, false);
return new RecyclerViewHolder(v);
}
@Override
public void onBindViewHolder(RecyclerAdapter.RecyclerViewHolder holder, int position) {
T item = items.get(position);
holder.bindData(item);
}
@Override
public int getItemCount() {
if (items == null) {
return 0;
}
return items.size();
}
}
You can find full code in Github repo : Recyclerview-Generic-Adapter
The problem i am facing is after using generic adapter RecyclerView
loading time increase and for a second it shows design time layout and than loads original data.
Warning: It's bad practice to pass the ViewModel into the RecyclerView adapter because that tightly couples the adapter with the ViewModel class. Note: Another common pattern is for the RecyclerView adapter to have a Callback interface for user actions.
The piece you're missing is the binding.executePendingBindings()
in bindData
:
public void bindData(T model) {
bindingInterface.bindData(binding, model);
binding.executePendingBindings();
}
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With