Android开发中总结的Adapter工具类

本文实例讲述了Android开发中总结的Adapter工具类。分享给大家供大家参考，具体如下：

Adapter是连接后端数据和前端显示的适配器接口，是数据和UI（View）之间一个重要的纽带。在常见的View(ListView,GridView)等地方都需要用到Adapter。

每个开发工程师都会有自己的一些常用到的工具类，今天我分享一下我自己总结的关于Adapter的工具类，话不多说直接上代码

CommonAdapter：

public abstract class CommonAdapter extends baseAdapter
{
  protected LayoutInflater mInflater;
  protected Context mContext;
  protected List mDatas;
  protected final int mItemLayoutId;
  public CommonAdapter(Context context, List 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);
  }
}

ViewHolder：

public class ViewHolder
{
  private final SparseArray mViews;
  private int mPosition;
  private View mConvertView;
  private ViewHolder(Context context, ViewGroup parent, int layoutId,
      int position)
  {
    this.mPosition = position;
    this.mViews = new SparseArray();
    mConvertView = LayoutInflater.from(context).inflate(layoutId, parent,
 false);
    // setTag
    mConvertView.setTag(this);
  }
  
  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;
  }
  
  public  T getView(int viewId)
  {
    View view = mViews.get(viewId);
    if (view == null)
    {
      view = mConvertView.findViewById(viewId);
      mViews.put(viewId, view);
    }
    return (T) view;
  }
  
  public ViewHolder setText(int viewId, String text)
  {
    TextView view = getView(viewId);
    view.setText(text);
    return this;
  }
  
  public ViewHolder setImageResource(int viewId, int drawableId)
  {
    ImageView view = getView(viewId);
    view.setImageResource(drawableId);
    return this;
  }
  
  public ViewHolder setImageBitmap(int viewId, Bitmap bm)
  {
    ImageView view = getView(viewId);
    view.setImageBitmap(bm);
    return this;
  }
  
  public ViewHolder setImageByUrl(int viewId, String url)
  {
    ImageLoader.getInstance(3,Type.LIFO).loadImage(url, (ImageView) getView(viewId));
    return this;
  }
  public int getPosition()
  {
    return mPosition;
  }
}

MyAdapter：

public class MyAdapter extends CommonAdapter
{
  private List mData ;
  public MyAdapter(Context context, List mDatas, int itemLayoutId)
  {
    super(context, mDatas, itemLayoutId);
    this.mDatas = mDatas ;
  }
  @Override
  public void convert(final ViewHolder helper, final String item , int postion)
  {
    
    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);
  
    
  }
}

附：完整实例代码点击此处本站下载。

PS：该下载源码包含了eclipse与studio两个压缩包。

更多关于Android相关内容感兴趣的读者可查看本站专题：《Android开发入门与进阶教程》、《Android布局layout技巧总结》、《Android视图View技巧总结》、《Android编程之activity操作技巧总结》、《Android操作json格式数据技巧总结》、《Android资源操作技巧汇总》及《Android控件用法总结》

希望本文所述对大家Android程序设计有所帮助。