Android_自定义简便快速通用的SimpleBaseAdapter

public abstract class SimpleBaseAdapter<T> extends BaseAdapter {

	protected Context context;
	protected List<T> data;

	public SimpleBaseAdapter(Context context){
		this(context, null);
	}
	public SimpleBaseAdapter(Context context, List<T> data) {
		this.context = context;
		this.data = data == null ? new ArrayList<T>() : new ArrayList<T>(data);
	}

	@Override
	public int getCount() {
		return data.size();
	}

	@Override
	public Object getItem(int position) {
		if (position >= data.size())
			return null;
		return data.get(position);
	}

	@Override
	public long getItemId(int position) {
		return position;
	}

	/**
	 * 该方法需要子类实现,需要返回item布局的resource id
	 * 
	 * @return
	 */
	public abstract int getItemResource();

	/**
	 * 使用该getItemView方法替换原来的getView方法,需要子类实现
	 * 
	 * @param position
	 * @param convertView
	 * @param parent
	 * @param holder
	 * @return
	 */
	public abstract View getItemView(int position, View convertView, ViewHolder holder);

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		ViewHolder holder;
		if (null == convertView) {
			convertView = View.inflate(context, getItemResource(), null);
			holder = new ViewHolder(convertView);
			convertView.setTag(holder);
		} else {
			holder = (ViewHolder) convertView.getTag();
		}
		return getItemView(position, convertView, holder);
	}

	public class ViewHolder {
		private SparseArray<View> views = new SparseArray<View>();
		private View convertView;

		public ViewHolder(View convertView) {
			this.convertView = convertView;
		}

		@SuppressWarnings("unchecked")
		public <T extends View> T getView(int resId) {
			View v = views.get(resId);
			if (v == null) {
				v = convertView.findViewById(resId);
				views.put(resId, v);
			}
			return (T) v;
		}
	}

	public void addAll(List<T> elem) {
		data.addAll(elem);
		notifyDataSetChanged();
	}

	public void remove(T elem) {
		data.remove(elem);
		notifyDataSetChanged();
	}

	public void remove(int index) {
		data.remove(index);
		notifyDataSetChanged();
	}

	public void replaceAll(List<T> elem) {
		data.clear();
		data.addAll(elem);
		notifyDataSetChanged();
	}
}

实例代码

private class MyAdapter extends SimpleBaseAdapter<String> {

	public MyAdapter(Context context, List<String> data) {
		super(context, data);
	}

	@Override
	public int getItemResource() {
		return R.layout.layout_item;
	}

	@Override
	public View getItemView(int position, View convertView, SimpleBaseAdapter<String>.ViewHolder holder) {
		TextView tvIndex = holder.getView(R.id.item_index);
		TextView tvContent = holder.getView(R.id.item_content);

		tvIndex.setText("p:" + position);
		tvContent.setText(getItem(position).toString());
		return convertView;
	}

}

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