Android BaseAdapter类重写模版

BaseAdapter 需要实现的

① 继承类的构造方法

② public int getCount()

③ public Object  getItem(int position)

④ public long getItemId(int position)

⑤ public View getView(int position , View converView , ViewGroup parent)

    这个很重要，这个View 显示 某一指定位置的视图。

模版如下：

public class ImageAdapter extends BaseAdapter {    private Context mContext;    public ImageAdapter(Context c) {        mContext = c;    }    public int getCount() {        return mThumbIds.length;    }    public Object getItem(int position) {        return null;    }    public long getItemId(int position) {        return 0;    }    // create a new ImageView for each item referenced by the Adapter    public View getView(int position, View convertView, ViewGroup parent) {        ImageView imageView;        if (convertView == null) {  // if it's not recycled, initialize some attributes            ......        } else {            imageView = (ImageView) convertView;        }        imageView.setImageResource(mThumbIds[position]);        return imageView;    }    // references to our images    private Integer[] mThumbIds = {            R.drawable.sample_2, R.drawable.sample_3,    };}