用于微调器和recyclerView的通用适配器

Question

可以为不同的视图编写通用适配器？我感兴趣的共同适配器recyclerView和spinner.在我的项目中,我有RecyclerView和Spinner,我想为两者编写基础通用适配器(RecyclerView和Spinner)你能帮助我吗？

Answer 1

是的,您可以为ListView/ Spinner和实现一个通用适配器RecyclerView

public static class CommonAdapter extends RecyclerView.Adapter<CommonAdapter.RecycleViewHolder>
            implements ListAdapter {


        private Context mContext;
        private List<String> data;

        public CommonAdapter(Context context, List<String> data) {
            mContext = context;
            this.data = data;
        }

        // Start of recycleview adapter
        @Override
        public RecycleViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            return new RecycleViewHolder(new TextView(mContext));
        }

        @Override
        public void onBindViewHolder(RecycleViewHolder holder, int position) {
            holder.textView.setText(data.get(position));
        }

        @Override
        public int getItemCount() {
            return getCount();
        }

        public static class RecycleViewHolder extends RecyclerView.ViewHolder {

            public TextView textView;

            public RecycleViewHolder(View itemView) {
                super(itemView);
                textView = (TextView) itemView;
            }
        }

        // Implementation of list adapter(Spinner/ListView)
        @Override
        public boolean areAllItemsEnabled() {
            return true;
        }

        @Override
        public boolean isEnabled(int position) {
            return true;
        }

        @Override
        public void registerDataSetObserver(DataSetObserver observer) {

        }

        @Override
        public void unregisterDataSetObserver(DataSetObserver observer) {

        }

        @Override
        public int getCount() {
            return data.size();
        }

        @Override
        public String getItem(int position) {
            return data.get(position);
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            SpinnerViewHolder holder;
            if (convertView == null) {
                convertView = new TextView(mContext);
                holder = new SpinnerViewHolder();
                holder.textView = (TextView) convertView;
                convertView.setTag(holder);
            } else {
                holder = (SpinnerViewHolder) convertView.getTag();
            }
            holder.textView.setText(getItem(position));
            return convertView;
        }

        @Override
        public int getViewTypeCount() {
            return 0;
        }

        @Override
        public boolean isEmpty() {
            return false;
        }

        public static class SpinnerViewHolder {
            public TextView textView;
        }

    }

这是执行此操作的基本思想,您可以进行更多内容以使用相同的适配器来处理所有不同ListView/ RecyclerView具有不同数据类型的适配器.但到目前为止,我给出了组合适配器的基本概念.

适配器正在扩展RecyclerView.ViewHolder所需的,RecyclerView并且我正在实现/ ListAdapter所需的相同类.ListViewSpinner