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RecycleView 作為新出的控件.他規(guī)范了 Viewholder 的寫(xiě)法.
但是總感覺(jué)適配器的寫(xiě)法過(guò)于冗長(zhǎng).怎么辦呢?
我們來(lái)簡(jiǎn)化他.
ViewHolder 的實(shí)現(xiàn)方式和ListView適配器的超省寫(xiě)法中的ViewHodler 是一樣的
ViewHolder.class

public class ViewHolder {    private SparseArray<View> viewHolder;    private View view;    public static  ViewHolder getViewHolder(View view){        ViewHolder viewHolder = (ViewHolder) view.getTag();        if (viewHolder == null) {            viewHolder = new ViewHolder(view);            view.setTag(viewHolder);        }        return viewHolder;    }    private ViewHolder(View view) {        this.view = view;        viewHolder = new SparseArray<View>();        view.setTag(viewHolder);    }    public <T extends View> T get(int id) {        View childView = viewHolder.get(id);        if (childView == null) {            childView = view.findViewById(id);            viewHolder.put(id, childView);        }        return (T) childView;    }    public View getConvertView() {        return view;    }    public TextView getTextView(int id) {        return get(id);    }    public Button getButton(int id) {        return get(id);    }    public ImageView getImageView(int id) {        return get(id);    }    public void setTextView(int  id,CharSequence charSequence){        getTextView(id).setText(charSequence);    }}

我們繼承 RecyclerView.Adapter<RVHolder>
AutoRVAdapter.class

public abstract class AutoRVAdapter extends RecyclerView.Adapter<RVHolder> {    public List<?> list;    private Context context;    public AutoRVAdapter(Context context, List<?> list) {        this.list = list;        this.context = context;    }    @Override    public RVHolder onCreateViewHolder(ViewGroup parent, int viewType) {        View view = LayoutInflater.from(context).inflate(onCreateViewLayoutID(viewType), null);        return new RVHolder(view);    }    public abstract int onCreateViewLayoutID(int viewType);    @Override    public void onViewRecycled(final RVHolder holder) {        super.onViewRecycled(holder);    }    @Override    public void onBindViewHolder(final RVHolder holder, final int position) {        onBindViewHolder(holder.getViewHolder(), position);        if (onItemClickListener != null) {            holder.itemView.setOnClickListener(new View.OnClickListener() {                @Override                public void onClick(View v) {                    onItemClickListener.onItemClick(null, v, holder.getPosition(), holder.getItemId());                }            });        }    }    public abstract void onBindViewHolder(ViewHolder holder, int position);    @Override    public int getItemCount() {        return list.size();    }    private AdapterView.OnItemClickListener onItemClickListener;    public AdapterView.OnItemClickListener getOnItemClickListener() {        return onItemClickListener;    }    public void setOnItemClickListener(AdapterView.OnItemClickListener onItemClickListener) {        this.onItemClickListener = onItemClickListener;    }}

RVHolder.class 繼承 RecyclerView.ViewHolder

public class RVHolder  extends RecyclerView.ViewHolder {    private ViewHolder viewHolder;    public RVHolder(View itemView) {        super(itemView);        viewHolder=ViewHolder.getViewHolder(itemView);    }    public ViewHolder getViewHolder() {        return viewHolder;    }}

到此,結(jié)束了
我們新寫(xiě)的適配器繼承AutoRVAdapter 實(shí)現(xiàn)onCreateViewLayoutID 和 onBindViewHolder 方法即可.
onCreateViewLayoutID->返回item 的布局.
onBindViewHolder->綁定數(shù)據(jù)源.

public class DemoRVAdapter extends AutoRVAdapter {    public RecyclerAdapter(Context context, List<?> list) {        super(context, list);    }    @Override    public int onCreateViewLayoutID(int viewType) {        return R.layout.item;    }    @Override    public void onBindViewHolder(ViewHolder holder, int position) {        Entity item=(Entity) list.get(position);        vh.getTextView(R.id.name).setText(item.getName());        vh.getTextView(R.id.age).setText(item.getAge());        vh.setText(R.id.height,item.getHeight());     }}