本文實例講述了Android開發中總結的Adapter工具類。分享給大家供大家參考，具體如下：
Adapter是連接后端數據和前端顯示的適配器接口，是數據和UI（View）之間一個重要的紐帶。在常見的View(ListView,GridView)等地方都需要用到Adapter。
每個開發工程師都會有自己的一些常用到的工具類，今天我分享一下我自己總結的關于Adapter的工具類，話不多說直接上代碼
CommonAdapter：
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); }}ViewHolder：
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對象 * * @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; } /** * 通過控件的Id獲取對于的控件，如果沒有則加入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; } /** * 為TextView設置字符串 * * @param viewId * @param text * @return */ public ViewHolder setText(int viewId, String text) { TextView view = getView(viewId); view.setText(text); return this; } /** * 為ImageView設置圖片 * * @param viewId * @param drawableId * @return */ public ViewHolder setImageResource(int viewId, int drawableId) { ImageView view = getView(viewId); view.setImageResource(drawableId); return this; } /** * 為ImageView設置圖片 * * @param viewId * @param drawableId * @return */ public ViewHolder setImageBitmap(int viewId, Bitmap bm) { ImageView view = getView(viewId); view.setImageBitmap(bm); return this; } /** * 通過圖片路徑為ImageView設置圖片 * @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; }}MyAdapter：
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) { /** * 第一種 */ 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)+"個") ; // 通過路徑設置圖片// helper.setImageByUrl(R.id.id_item_image, mDirPath + "/" + item); /* * 第二種 */ /* * 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)+"個") ; item_iv.setImageResource(R.drawable.ic_launcher); item_ib.setColorFilter(Color.parseColor("#77000000")); */ }}附：完整實例代碼點擊此處本站下載。
PS：該下載源碼包含了eclipse與studio兩個壓縮包。
希望本文所述對大家Android程序設計有所幫助。
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