突发奇想,把RecyclerView的Adapter封装了一下,留着自己用

时间:2021-02-23 09:22:18

每次都从头到位写adapter烦死。自己没事写了一个不完善的万能Adapter后期会继续完善。转载请写明出处

public abstract class OmRecyclerViewAdapter<T> extends RecyclerView.Adapter<OmRecyclerViewAdapter.ViewHolder> {

    private Context context;
    private List<T> data;
    private int layoutRes;

//三个参数的含义,上下文对象、数据源、布局文件R.layout.XXX
    public OmRecyclerViewAdapter(Context context, List<T> data, int layoutRes) {
        if (data != null) {
            this.data = data;
        } else {
            this.data = new ArrayList<>();
        }
        this.context = context;
        this.layoutRes = layoutRes;
    }


    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View inflate = LayoutInflater.from(context).inflate(layoutRes, null, false);
        return new ViewHolder(inflate);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        bindData(holder, position, data);
    }

    @Override
    public int getItemCount() {
        return data != null ? data.size() : 0;
    }

    public static class ViewHolder extends RecyclerView.ViewHolder {
        Map<Integer, View> cacheView;
        public ViewHolder(View itemView) {
            super(itemView);
            cacheView = new HashMap<>();
        }

        /**
         * 获取itemView中的childView
         *
         * @param resId
         * @return
         */
        public View getView(int resId) {
            View view = null;
            // 判断Map缓存中是否包含我们要实例化的View
            if (cacheView.containsKey(resId)) {
                // 可以直接返回
                view = cacheView.get(resId);
            } else {
                // 实例化一个,添加到缓存中
                view = itemView.findViewById(resId);
                cacheView.put(resId, view);
            }
            return view;
        }
    }

    public abstract void bindData(ViewHolder holder, int position, List<T> data);
}


导入方法:

Add it in your root build.gradle at the end of repositories:
    allprojects {
        repositories {
            ...
            maven { url 'https://jitpack.io' }
        }
Add the dependency:
    dependencies {
            compile 'com.github.WhatFxxk:OmRecyclerViewAdapter:v1.0.0'
    }



    }