BaseAdapter适配器工厂类

写了一个BaseAdapter的公共类，以后可以直接继承，避免了重复的写不同的适配器：

public abstract class ArrayListAdapter<T> extends BaseAdapter{
    
    protected ArrayList<T> mList;
    protected Activity mContext;
    protected ListView mListView;
    
    public ArrayListAdapter(Activity context){
        this.mContext = context;
    }

    @Override
    public int getCount() {
        if(mList != null)
            return mList.size();
        else
            return 0;
    }

    @Override
    public Object getItem(int position) {
        return mList == null ? null : mList.get(position);
    }

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

    @Override
    abstract public View getView(int position, View convertView, ViewGroup parent);
    
    public void setList(ArrayList<T> list){
        this.mList = list;
        notifyDataSetChanged();
    }
    
    public ArrayList<T> getList(){
        return mList;
    }
    
    public void setList(T[] list){
        ArrayList<T> arrayList = new ArrayList<T>(list.length);  
        for (T t : list) {  
            arrayList.add(t);  
        }  
        setList(arrayList);
    }
    
    public ListView getListView(){
        return mListView;
    }
    
    public void setListView(ListView listView){
        mListView = listView;
    }

}

 

 下面是引用上面Adapter的例子：

public class AlbumAdapter extends ArrayListAdapter<Album> {
    
    public AlbumAdapter(Activity context) {
        super(context);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row=convertView;

        ViewHolder holder;

        if (row==null) {
            LayoutInflater inflater = mContext.getLayoutInflater();
            row=inflater.inflate(R.layout.album_row, null);

            holder = new ViewHolder();
            holder.image = (RemoteImageView)row.findViewById(R.id.AlbumRowImageView);
            holder.albumText = (TextView)row.findViewById(R.id.AlbumRowAlbumTextView);
            holder.artistText = (TextView)row.findViewById(R.id.AlbumRowArtistTextView);
            holder.progressBar = (ProgressBar)row.findViewById(R.id.AlbumRowRatingBar);

            row.setTag(holder);
        }
        else{
            holder = (ViewHolder) row.getTag();
        }
        
        holder.image.setDefaultImage(R.drawable.no_cd);
        holder.image.setImageUrl(mList.get(position).getImage(),position, getListView());
        holder.albumText.setText(mList.get(position).getName());
        holder.artistText.setText(mList.get(position).getArtistName());
        holder.progressBar.setMax(10);
        holder.progressBar.setProgress((int) (mList.get(position).getRating()*10));

        return row;
    }
    
    /**
     * Class implementing holder pattern,
     * performance boost
     * 
     * @author Lukasz Wisniewski
     */
    static class ViewHolder {
        RemoteImageView image;
        TextView albumText;
        TextView artistText;
        ProgressBar progressBar;
    }
}

只需重写getView（）方法，设置不同的布局，和显示不同的值就可以了。