具有DataBinding的RecyclerView通用适配器

Question

我已经通过使用DataBinding为RecyclerView创建了通用适配器。这是小代码段

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();
}
}

您可以在Github存储库中找到完整的代码：Recyclerview-Generic-Adapter

我面临的问题是使用通用适配器后，RecyclerView加载时间增加了，有一秒钟它显示了设计时的布局，然后加载了原始数据。

Answer 1

您缺少的部分binding.executePendingBindings()是bindData：

public void bindData(T model) {
    bindingInterface.bindData(binding, model);
    binding.executePendingBindings();
}