package com.example.utils;import android.content.Context;import android.util.SparseArray;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;public class ViewHolder {    private SparseArray
     
       mViews;    private int mPosition;    private View convertView;    // 需要的参数    public ViewHolder(Context context, ViewGroup parent, int layoutId,            int position) {        /**         * 进行初始化设置         */        mViews = new SparseArray
      
       ();        mPosition = position;        convertView = LayoutInflater.from(context).inflate(layoutId, parent,                false);        convertView.setTag(this);    }    // viewHolder入口    public static ViewHolder get(Context context, View convertView,            ViewGroup parent, int layoutId, int position) {        // 如果为空则new出新的        if (convertView == null) {            return new ViewHolder(context, parent, layoutId, position);        } else {            ViewHolder holder = (ViewHolder) convertView.getTag();            //更新position            holder.mPosition = position;            return holder;        }    }        /**     * 通过id获取控件     * @param id     * @return     */    public 
       
         T getView(int id){        View view = mViews.get(id);        if(view == null){            view = convertView.findViewById(id);            mViews.put(id, view);        }        return (T) view;    }         public View getConvertView() {        return convertView;    }        public int getPosition(){        return mPosition;    }}
       
      
     

基类适配器

package com.example.utils;import java.util.List;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;public abstract class CommonAdapter
     
       extends BaseAdapter {    protected List
      
        data;    protected Context mContext;        public CommonAdapter(List
       
         data,Context mContext){        this.data = data;        this.mContext = mContext;    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return data.size();    }    @Override    public Object getItem(int position) {        // TODO Auto-generated method stub        return data.get(position);    }    @Override    public long getItemId(int position) {        // TODO Auto-generated method stub        return position;    }    @Override    public abstract View getView(int position, View convertView, ViewGroup parent);    }
       
      
     

package com.example.bluetooth;import java.util.List;import com.example.utils.CommonAdapter;import com.example.utils.ViewHolder;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;public class MyAdapter extends CommonAdapter
     
      {        public MyAdapter(List
      
        data, Context mContext) {        super(data, mContext);    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        //初始化        ViewHolder holder = ViewHolder.get(mContext, convertView, parent, R.layout.item, position);        //设置值        TextView name = holder.getView(R.id.item_name);        TextView address = holder.getView(R.id.item_address);        name.setText(data.get(position).getName());        address.setText(data.get(position).getAddress());        //返回注意getConvertView        return holder.getConvertView();        }}