Android开发中总结的Adapter工具类【附完整源码下载】

public abstract class CommonAdapter<T> extends BaseAdapter
{
  protected LayoutInflater mInflater;
  protected Context mContext;
  protected List<T> mDatas;
  protected final int mItemLayoutId;
  public CommonAdapter(Context context, List<T> mDatas, int itemLayoutId)
  {
    this.mContext = context;
    this.mInflater = LayoutInflater.from(mContext);
    this.mDatas = mDatas;
    this.mItemLayoutId = itemLayoutId;
  }
  @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) , position);
    return viewHolder.getConvertView();
  }
  public abstract void convert(ViewHolder helper, T item , int postion);
  private ViewHolder getViewHolder(int position, View convertView,
      ViewGroup parent)
  {
    return ViewHolder.get(mContext, convertView, parent, mItemLayoutId,
        position);
  }
}

public class ViewHolder
{
  private final SparseArray<View> mViews;
  private int mPosition;
  private View mConvertView;
  private ViewHolder(Context context, ViewGroup parent, int layoutId,
      int position)
  {
    this.mPosition = position;
    this.mViews = new SparseArray<View>();
    mConvertView = LayoutInflater.from(context).inflate(layoutId, parent,
        false);
    // setTag
    mConvertView.setTag(this);
  }
  /**
   * 拿到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)
  {
    ViewHolder holder = null;
    if (convertView == null)
    {
      holder = new ViewHolder(context, parent, layoutId, position);
    } else
    {
      holder = (ViewHolder) convertView.getTag();
      holder.mPosition = position;
    }
    return holder;
  }
  public View getConvertView()
  {
    return mConvertView;
  }
  /**
   * 通过控件的Id获取对于的控件，如果没有则加入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;
  }
  /**
   * 通过图片路径为ImageView设置图片
   * @param viewId
   * @param drawableId
   * @return
   */
  public ViewHolder setImageByUrl(int viewId, String url)
  {
    ImageLoader.getInstance(3,Type.LIFO).loadImage(url, (ImageView) getView(viewId));
    return this;
  }
  public int getPosition()
  {
    return mPosition;
  }
}

public class MyAdapter extends CommonAdapter<String>
{
  private List<String> mData ;
  public MyAdapter(Context context, List<String> mDatas, int itemLayoutId)
  {
    super(context, mDatas, itemLayoutId);
    this.mDatas = mDatas ;
  }
  @Override
  public void convert(final ViewHolder helper, final String item , int postion)
  {
    /**
     * 第一种
     */
    helper.setImageResource(R.id.item_ib01, R.drawable.ic_launcher);
    helper.setImageResource(R.id.item_iv01,
        R.drawable.ic_launcher);
    helper.setText(R.id.item_tv01, "我是第"+mDatas.get(postion)+"个") ;
    // 通过路径设置图片
//   helper.setImageByUrl(R.id.id_item_image, mDirPath + "/" + item);
  /*
   * 第二种
   */
    /*
     *
    final ImageView item_iv = helper.getView(R.id.item_iv01);
    final ImageButton item_ib = helper.getView(R.id.item_ib01);
    TextView item_tv = helper.getView(R.id.item_tv01) ;
    item_tv.setText("我是第"+mDatas.get(postion)+"个") ;
    item_iv.setImageResource(R.drawable.ic_launcher);
    item_ib.setColorFilter(Color.parseColor("#77000000"));
     */
  }
}