Adapter 二次封装一句话实现适配

最新推荐文章于 2025-09-07 20:08:22 发布

转载最新推荐文章于 2025-09-07 20:08:22 发布 · 58 阅读

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原文链接：http://www.cnblogs.com/seanzhoutao/p/5687733.html

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#移动开发 #java

本文介绍了一种简化ListView/GridView Adapter编写的方法，通过自定义通用Adapter基类AbstracrHolderAdapter，大幅减少每次编写Adapter的工作量。该方法只需指定布局文件及绑定数据逻辑即可，极大提升了开发效率。

1 首先在listview gridview 编写Adatpter时候每次都自己去写Adapter

 public void setListAdapter(List<NewCarPriceInfo> info_) {
        list_.setAdapter(new AbstracrHolderAdapter<NewCarPriceInfo>( act, info_, R.layout.newcar_price_layout) {
            @Override
            public void bindViewAndData(AbstracrHolderAdapter.ViewHolder holder, int position, NewCarPriceInfo item) {
                ((TextView)holder.getView(R.id.tv_shop_name)).setText( item.getDealer_name());
                ((TextView)holder.getView(R.id.new_price)).setText( item.getPrice()+"万");
                ((TextView)holder.getView(R.id.tv_address)).setText( item.getDealer_address());
            }
        });
    }

现在可以只要一句话就能实现适配

2 接来我们看看 AbstracrHolderAdapter 这个类

package com.che300.price.adapter;

import android.content.Context;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;

import com.sunshine.adapterlibrary.adapter.ViewHolder;

import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by Administrator on 2016/7/15.
 */
public abstract class AbstracrHolderAdapter<T> extends BaseAdapter {
        private Context mContext;
        private List<T> list;
        protected LayoutInflater mInflater;
        private int mItemLayoutId;

        public AbstracrHolderAdapter(Context context, List<T> list, int itemLayoutId) {
            this.mContext = context;
            this.mInflater = LayoutInflater.from(mContext);
            this.mItemLayoutId = itemLayoutId;
            this.list = list;
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return list.size();
        }

        public List<T> getList() {
            // TODO Auto-generated method stub
            return this.list;
        }

        public void setList(List<T> list) {
            // TODO Auto-generated method stub
            this.list = list;
            notifyDataSetChanged();
        }

        @SuppressWarnings("unchecked")
        public void addList(List<T> list2) {
            // TODO Auto-generated method stub
            this.list.addAll(list2);
            notifyDataSetChanged();
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return this.list.get(position);
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            final ViewHolder viewHolder = ViewHolder.get(mContext,convertView,mItemLayoutId);
            bindViewAndData(viewHolder, position,(T) getItem(position));
            return viewHolder.getConvertView();
        }

        public abstract void bindViewAndData(ViewHolder holder,int position, T item);

     public  static    class  ViewHolder {
          private View mConvertView;
          private final SparseArray<View> mViews = new SparseArray<View>();
          private ViewHolder(Context context, int layoutId) {
              mConvertView = LayoutInflater.from(context).inflate(layoutId, null,
                      false);
              mConvertView.setTag(this);
          }

          public static ViewHolder get(Context context, View convertView,
                                        int layoutId) {
              if (convertView == null) {
                  return new ViewHolder(context, layoutId);
              }
              return (ViewHolder) convertView.getTag();
          }

          public <T extends View> T getView(int viewId) {
              View view = mViews.get(viewId);
              if (view == null) {
                  view = mConvertView.findViewById(viewId);
                  mViews.put(viewId, view);
              }
              return (T) view;
          }

          public View getConvertView() {
              return mConvertView;
          }
      }

}