Written by java-style
on 2021-10-07

BaseAdapter 를 만들어봄.. JAVA with(DataBinding)

매번 사용하는 BaseActivity , Fragment

음.. 생각해보니 Adapter를 만들생각을 안해봄..그래서 만들었다. ( 딱히 공통으로 들어갈만한게 없어도 이긴한데..ㅋ )

1. BaseAdapter

- bindtViewHolder 메서드는 onCreateViewHolder에서 B 타입으로 넘겨줘야하는데 딱히 방법이 생각나지 않았다..ㅠ

public abstract class BaseAdapter< A extends ViewDataBinding, B extends RecyclerView.ViewHolder > extends RecyclerView.Adapter { protected abstract @LayoutRes int getLayout(); protected abstract B bindViewHolder(A binding); @NonNull @Override public B onCreateViewHolder(@NonNull ViewGroup parent, int viewType) { A binding = DataBindingUtil.inflate( LayoutInflater.from(parent.getContext()) , getLayout(), parent , false); return bindViewHolder(binding); } }

2. BaseViewHolder

abstract public class BaseViewHolder< A extends ViewDataBinding > extends RecyclerView.ViewHolder { protected A mBinding; public BaseViewHolder(A a) { super(a.getRoot()); mBinding = a; } }

--------------사용 -------

1. Adapter

- 확실히 사용이 간결해졌다.

public class MainAdapter extends BaseAdapter< ItemTextBinding , MainViewHolder > { private final ArrayList mArr; public MainAdapter(ArrayList mArr) { this.mArr = mArr; } @Override protected int getLayout() { return R.layout.item_text; } @Override protected MainViewHolder getViewHolder(ItemTextBinding binding) { return new MainViewHolder(binding); } @Override public void onBindViewHolder(@NonNull MainViewHolder holder, int position) { holder.bind(mArr.get(position)); } @Override public int getItemCount() { return mArr.size(); } }

2. ViewHolder

public class MainViewHolder extends BaseViewHolder { public MainViewHolder(ItemTextBinding itemTextBinding) { super(itemTextBinding); } public void bind(String row) { mBinding.fragTextview.setText(row); } }

https://github.com/ShinHoChull/MVVM/tree/master/app/src/main/java/com/m2comm/test/base

from http://shinyongchul.tistory.com/60 by ccl(A) rewrite - 2021-10-07 14:27:48

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