一个RecycleView的强大adapter

最新推荐文章于 2019-09-04 15:55:39 发布

原创最新推荐文章于 2019-09-04 15:55:39 发布 · 181 阅读

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#数据 #recyclerview使用

代码地址如下：
http://www.demodashi.com/demo/12218.html

前言

一般我们要在mainActivity中利用RecycleView展示一个列表数据的时候，adapter都是类似以下写法：

public class NameAdapter<T> extends RecyclerView.Adapter {

    protected Context mContext;
    protected View mLayoutView;
    protected List<T> mData;
    private ViewHolder mViewHolder;

    public NameAdapter(Context context, List<T> data) {
        this.mContext = context;
        this.mData = data;
    }


    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        mLayoutView = LayoutInflater.from(mContext).inflate(R.layout.item_layout, parent, false);
        mViewHolder = new ViewHolder(mLayoutView);
        return mViewHolder;
    }

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

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        mViewHolder = ((ViewHolder) holder);

        initData(position);
        setListener(position);
    }

    private void initData(int position){
        mViewHolder.mTvName.setText(mData.get(position).toString());
    }

    private void setListener(int position){

    }


    class ViewHolder extends RecyclerView.ViewHolder {

        TextView mTvName;

        public ViewHolder(View view) {
            super(view);
            mTvName = (TextView) view.findViewById(R.id.tv_name);
        }
    }
}

然后在mainActivity中调用如下：

mNameList= Arrays.asList("小明","小红","小芳","小花","小海","小林","小叶","小虎","小柔");

        mRecyclerView.setHasFixedSize(true);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mNameAdapter = new NameAdapter<>(this, mNameList);
        mRecyclerView.setAdapter(mNameAdapter);

那么有什么方法能缩减NameAdapter中的代码，使我们在使用RecycleView进行列表数据展示的时候，把NameAdapter也的更简洁些呢，下面就给大家介绍一款adapter框架，相信在使用它后，将大大缩减NameAdapter的代码

1.配置

在projected的build.gradle中配置maven：

maven { url "https://jitpack.io" }

具体配置如下：

allprojects {
    repositories {
        google()
        jcenter()

        maven { url "https://jitpack.io" }
    }
}

在app module的build.gradle中添加依赖：

compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.34'

自此,配置结束.

2.写一个公共的adapter，名为ComAdapter，集成基本的初始化，加载动画等方法

public abstract class ComAdapter<T> extends BaseQuickAdapter<T, BaseViewHolder> {

    protected Context mContext;
    protected List<T>mData;
    protected int mItemViewId;//item布局id
    protected View mHeaderView;
    protected View mFooterView;

    public ComAdapter(int itemViewId,List<T>data,Context context) {
        super(itemViewId, data);
        this.mItemViewId=itemViewId;
        this.mContext=context;
        this.mData=data;
    }

    @Override
    protected void convert(BaseViewHolder viewHolder, T t) {
        initView(viewHolder,t);
        initData(viewHolder,t);
        setListener(viewHolder,t);
    }

    //以下代码见例子
    //......

3.自己写的NameAdapter继承于ComAdapter

public class NameAdapter<T>extends ComAdapter {

    private TextView mTvName;

    public NameAdapter(List<T> data, Context context){
        super(R.layout.item_layout,data,context);
    }

    @Override
    protected void initView(BaseViewHolder viewHolder, Object o) {
        mTvName=viewHolder.getView(R.id.tv_name);
    }

    //以下代码省略
    //......

4.在mainActivity中的使用

声明

   @BindView(R.id.recycler_view)
    RecyclerView mRecyclerView;

    private List<String>mNameList;
    private NameAdapter mNameAdapter;

初始化

        mNameList= Arrays.asList("小明","小红","小芳","小花","小海","小林","小叶","小虎","小柔");
        mNameAdapter=new NameAdapter(mNameList,mContext);//初始化NameAdapter
        mNameAdapter.setRecyclerManager(mRecyclerView);//设置RecyclerView特性
        mNameAdapter.addHeaderView(R.layout.item_header);//添加header
        mNameAdapter.addFooterView(R.layout.item_footer);//添加footer
        mNameAdapter.openLeftAnimation();//设置加载动画

item点击事件

        //item點擊事件
        mNameAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
            @Override
            public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(MainActivity.this, "onItemLongClick" + position, Toast.LENGTH_SHORT).show();
            }
        });

item中子控件点击事件

 //子空控件点击事件
        mNameAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
            @Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
                Toast.makeText(MainActivity.this, "onItemLongClick" + mNameList.get(position), Toast.LENGTH_SHORT).show();
            }
        });