我们寻常使用Adapter的方式

public class BusbaseSearchApadter extends SimpleBaseApadter {

	private List<Busbase> busbases = new ArrayList<Busbase>();

	public Context context;

	public void setList(List<Busbase> busbases) {

		this.busbases = busbases;

	}

	public BusbaseSearchApadter(Context context) {

		super(context);

		this.context = context;

	}

	@Override

	public int getCount() {

		return busbases.size();

	}

	@Override

	public Object getItem(int position) {

		return busbases.get(position);

	}

	@Override

	public long getItemId(int position) {

		return position;

	}

	@Override

	public View getView(int position, View convertView, ViewGroup parent) {

		Busbase busbase = busbases.get(position);

		ViewHolder holder = null;

		if(convertView == null){

			holder = new ViewHolder();

			convertView = LayoutInflater.from(context).inflate(R.layout.hx_item_search_bus, parent, false);

			holder.hx_item_bus_search_image = (ImageView)convertView.findViewById(R.id.hx_item_bus_search_image);

			holder.hx_item_bus_search_name = (TextView)convertView.findViewById(R.id.hx_item_bus_search_name);

			holder.hx_item_bus_search_mobile = (TextView)convertView.findViewById(R.id.hx_item_bus_search_mobile);

			convertView.setTag(holder);

		}else{

			holder = (ViewHolder)convertView .getTag();

		}

		bitmapUtils.display(holder.hx_item_bus_search_image, busbase.getShopLogo());

		holder.hx_item_bus_search_name.setText(busbase.name);

		holder.hx_item_bus_search_mobile.setText(busbase.mobile);

		return convertView;

	}

	class ViewHolder{

		ImageView hx_item_bus_search_image;

		TextView hx_item_bus_search_name;

		TextView hx_item_bus_search_mobile;

	}

能够看出当中  实用的代码仅仅有仅仅有getView  和ViewHolder  可是其它的代码又不得不写，太痛苦 了不得不反复的写无数adapter 和ViewHoder.

我们能够写一个通用的ViewHolder

public class ViewHolder {

	private final SparseArray<View> mViews;

    private int mPosition;

    private View mConvertView;

    protected BitmapUtils bitmapUtils;

    private ViewHolder(Context context, ViewGroup parent, int layoutId,

            int position)

    {

    	bitmapUtils = new BitmapUtils(context);

		bitmapUtils.configDefaultLoadingImage(R.drawable.hx_loodding);

		bitmapUtils.configDefaultLoadFailedImage(R.drawable.hx_loodding);

		bitmapUtils.configDefaultBitmapConfig(Bitmap.Config.RGB_565);

        this.mPosition = position;

        this.mViews = new SparseArray<View>();

        mConvertView = LayoutInflater.from(context).inflate(layoutId, parent,

                false);

        // setTag

        mConvertView.setTag(this);

    }  

    /**

     * 拿到一个ViewHolder对象

     *

     * @param context

     * @param convertView

     * @param parent

     * @param layoutId

     * @param position

     * @return

     */

    public static ViewHolder get(Context context, View convertView,

            ViewGroup parent, int layoutId, int position)

    {

        if (convertView == null)

        {

            return new ViewHolder(context, parent, layoutId, position);

        }

        return (ViewHolder) convertView.getTag();

    }  

    public View getConvertView()

    {

        return mConvertView;

    }  

    /**

     * 通过控件的Id获取对于的控件，假设没有则增加views

     *

     * @param viewId

     * @return

     */

    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;

    }  

    /**

     * 为TextView设置字符串

     *

     * @param viewId

     * @param text

     * @return

     */

    public ViewHolder setText(int viewId, String text)

    {

        TextView view = getView(viewId);

        view.setText(text);

        return this;

    }  

    /**

     * 为ImageView设置图片

     *

     * @param viewId

     * @param drawableId

     * @return

     */

    public ViewHolder setImageResource(int viewId, int drawableId)

    {

        ImageView view = getView(viewId);

        view.setImageResource(drawableId);  

        return this;

    }  

    /**

     * 为ImageView设置图片

     *

     * @param viewId

     * @param drawableId

     * @return

     */

    public ViewHolder setImageBitmap(int viewId, Bitmap bm)

    {

        ImageView view = getView(viewId);

        view.setImageBitmap(bm);

        return this;

    }  

    /**

     * 为ImageView设置图片

     *

     * @param viewId

     * @param drawableId

     * @return

     */

    public ViewHolder setImageByUrl(int viewId, String url)

    {

    	bitmapUtils.display((ImageView) getView(viewId), url);

        return this;

    }  

    public int getPosition()

    {

        return mPosition;

    }

使用一个SparseArray将View存起来

如今Adapter这样写

public abstract class AbstuctBaseApadter<T> extends SimpleBaseApadter {

	protected LayoutInflater mInflater;

	protected Context mContext;

	protected List<T> mDatas;

	protected int mItemLayoutId;

	public AbstuctBaseApadter(Context context) {

		super(context);

	}

    public AbstuctBaseApadter(Context context, List<T> mDatas, int itemLayoutId)

    {

    	this(context);

        this.mContext = context;

        this.mInflater = LayoutInflater.from(mContext);

        this.mDatas = mDatas;

        this.mItemLayoutId = itemLayoutId;

    }  

    public void setList(List<T> mDatas){

    	 this.mDatas = mDatas;

    }

    @Override

    public int getCount()

    {

        return mDatas.size();

    }  

    @Override

    public T getItem(int position)

    {

        return mDatas.get(position);

    }  

    @Override

    public long getItemId(int position)

    {

        return position;

    }  

    @Override

    public View getView(int position, View convertView, ViewGroup parent)

    {

        final ViewHolder viewHolder = getViewHolder(position, convertView,

                parent);

        convert(viewHolder, getItem(position));

        return viewHolder.getConvertView();  

    }  

    public abstract void convert(ViewHolder helper, T item);  

    private ViewHolder getViewHolder(int position, View convertView,

            ViewGroup parent)

    {

        return ViewHolder.get(mContext, convertView, parent, mItemLayoutId,

                position);

    }

如今我们仅仅须要重写 convert方法  看activity里面怎么使用

		AbstuctBaseApadter abstuctBaseApadter = new AbstuctBaseApadter<Map<String,Object>>(activity,list_map,R.layout.hx_money_item) {

			public void convert(ViewHolder helper, Map<String, Object> item) {

				helper.setText(R.id.id_item_1, item.get("time").toString());

				helper.setText(R.id.id_item_3, item.get("sourcename").toString());

			}

		};

直接在activity里面写匿名内部类就能够了

哈哈  打工改成