万能ViewHolder和基类适配器

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<View> 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<View>();
        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 extends View> 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<T> extends BaseAdapter {
    protected List<T> data;
    protected Context mContext;
    
    public CommonAdapter(List<T> 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<Bean>{
    
    public MyAdapter(List<Bean> 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();
    
    }
}