Android适配器之 V7扩展包 RecyclerView 的使用以及万能适配器的封装实现

推荐优先本地搜索浏览 Android适配器之DataModifyHelper数据操作类的封装

添加Gradle依赖

compile 'com.android.support:appcompat-v7:23.2.1'
compile 'com.android.support:recyclerview-v7:23.2.1'
备注：recyclerview的版本号要与appcompat的一致，此处为： v7:23.2.1

以泛型方式定义通用RecyclerViewHold对象，内部以SparseArray存储View对象，提高xml的解析速度。
/**
 * Created by Administrator on 2016/6/14.
 * 通用Recycler.ViewHolder
 */
public class UnityRecyclerAdapterViewHolder extends RecyclerView.ViewHolder {
    private static final UtilsLog lg = UtilsLog.getLogger(UnityRecyclerAdapterViewHolder.class);
    private SparseArray<View> mViews;
    private View mConvertView;

    public UnityRecyclerAdapterViewHolder(View itemView, ViewGroup parent) {
        super(itemView);
        this.mConvertView = itemView;
        this.mViews = new SparseArray<>();
    }

    public View getConvertItemView() {
        return mConvertView;
    }

    /**
     * 通过viewId获取控件
     *
     * @param viewId
     * @return
     */
    public <T extends View> T generateView(int viewId) {
        View view = mViews.get(viewId);
        if (view == null) {
            view = mConvertView.findViewById(viewId);
            mViews.put(viewId, view);
        }
        return (T) view;
    }

    public <T extends View> T generateView(int viewId, Class<T> clz) {
        return (T) generateView(viewId);
    }
}
重写onCreateViewHolder与onBindViewHolder，其中onCreateViewHolder为每个Item生成View对象，并封装至ViewHolder中返回；onBindViewHolder负责渲染数据至View
/**
 * Created by Administrator on 2016/6/15.
 * Recycler.Adapter基类
 * 1.getItemLayoutId与getItemLayoutView二者选择其一进行复写：此处为支持布局以及代码方式
 * 2.该类还可以继续扩展，对仅有单个布局的情况，可以通过构造方法直接注入itemLayoutId
 */
public abstract class AbsUnityBaseRecyclerAdapter<T> extends RecyclerView.Adapter<UnityRecyclerAdapterViewHolder> implements INotifyAdapterDataSetChange {

    private static final UtilsLog lg = UtilsLog.getLogger(AbsUnityBaseRecyclerAdapter.class);
    private IAdapterDataModifyHelper<T> IAdapterataModifyHelper;//操作数据的Helper类
    private LayoutInflater layoutInflater;

    public AbsUnityBaseRecyclerAdapter() {
        this.IAdapterataModifyHelper = new DataModifyHelper<>();
    }

    public IAdapterDataModifyHelper<T> getDataModifyHelper() {
        this.IAdapterataModifyHelper.setNotifyAdapterDataSetChange(this);
        return IAdapterataModifyHelper;
    }

    /*系统重写函数*/
    @Override
    public UnityRecyclerAdapterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        lg.e("onCreateViewHolder");
        if (this.layoutInflater == null) {
            this.layoutInflater = LayoutInflater.from(parent.getContext());
        }
        return new UnityRecyclerAdapterViewHolder(getItemLayoutView(viewType), parent);
    }

    @Override
    public void onBindViewHolder(UnityRecyclerAdapterViewHolder holder, int position) {
        lg.e("onBindViewHolder with postion[" + position + "]:" + holder.toString());
        convert(IAdapterataModifyHelper.getDataResources().get(position), holder, position);
    }

    @Override
    public int getItemCount() {
        return IAdapterataModifyHelper.getDataResources().size();
    }

    /**
     * 填充数据
     *
     * @param viewHolder
     * @param position
     */
    public abstract void convert(T itemEntity, UnityRecyclerAdapterViewHolder viewHolder, int position);

    /**
     * 通过ItemViewType返回布局id
     *
     * @param viewType
     * @return
     */
    public int getItemLayoutId(int viewType) {
        return 0;
    }

    /**
     * 通过viewType返回指定Item布局
     *
     * @param viewType
     * @return
     */
    public View getItemLayoutView(int viewType) {
        return layoutInflater.inflate(getItemLayoutId(viewType), null);
    }

    @Override
    public void notifyAdapter() {
        notifyDataSetChanged();
    }
}
具体使用方式如下，
adapter = new SingleItemRecyclerAdapter<CorePageEntity>(R.layout.simple_item_horizontal) {
    @Override
    public void convert(CorePageEntity itemEntity, UnityRecyclerAdapterViewHolder viewHolder, int position) {
        if (position != 0) {
            lg.e("convert with position " + position + ":" + viewHolder.toString());
        }
        viewHolder.generateView(R.id.imgItemCommon, ImageView.class).setVisibility(View.GONE);
        viewHolder.generateView(R.id.tvItemCommon, TextView.class).setText(itemEntity.getCorePageTitle());
    }
};

gridActMain.setAdapter(adapter);
gridActMain.setLayoutManager(new GridLayoutManager(getCurActivity(), 1));

adapter.getDataModifyHelper().setDataResource(//添加数据集);



# 后续添加onItemClicklistener事件




posted @ 2016-08-21 00:32  小轩948  阅读(452)  评论(0)  编辑  收藏  举报