Android：ListView、SimpleAdapter、设置不同行布局、getViewTypeCount、getItemViewType

public class MainActivity extends Activity
{
               
    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
                   
        ListView listView = (ListView) findViewById(R.id.listView1);
                   
        ArrayList<HashMap<String, String>> data = new ArrayList<HashMap<String,String>>();
                   
        for (int i = 0; i < 30; i++)
        {
            HashMap<String, String> object = new HashMap<String, String>();
            object.put("title","title" + i );
            object.put("subtitle","subtitle" + i );
            object.put("time","time" + i );
            data.add(object);
        }
                   
        String[] from = new String[]{"title","subtitle","time"};//作为hashmap的key使用
        int[] to = new int[]{R.id.textView_title,R.id.textView_subtitle,R.id.textView_time};
        SimpleAdapter simpleAdapter = new SimpleAdapter(this, data, R.layout.relaout, from, to);
        listView.setAdapter(simpleAdapter);
    }
               
    @Override
    public boolean onCreateOptionsMenu(Menu menu)
    {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
               
}

注：SimpleAdapter支持的控件有限。

==================================================================

二、设置不同行布局

代码如下:

    class WeiboListAdapter extends BaseAdapter
    {
        private final static int VIEW_TYPE1 = 0;
        private final static int VIEW_TYPE2 = 1;
        private final static int VIEW_TYPE_COUNT = VIEW_TYPE2 + 1;
        
        @Override
        public View getView(int position, View convertView, ViewGroup parent)
        {
            CommentViewHolder commentHolder = null;
            ViewHolder holder = null;
            
            int type = getItemViewType(position);
            
            if (convertView == null)
            {
                if (type == VIEW_TYPE1)
                {
                    // 微博内容
                    convertView = getLayoutInflater().inflate(R.layout.weibo_item, null);
                    holder = new ViewHolder();
                    holder.headerImg = (ImageView) convertView.findViewById(R.id.weibo_item_iv_headerImg);
                    holder.userName = (TextView) convertView.findViewById(R.id.weibo_item_tv_userName);
                    holder.commentNum = (TextView) convertView.findViewById(R.id.weibo_item_tv_commentNum);
                    holder.forwardTimes = (TextView) convertView.findViewById(R.id.weibo_item_tv_forwardTimes);
                    holder.content = (TextView) convertView.findViewById(R.id.weibo_item_tv_content);
                    holder.contentImg = (ImageView) convertView.findViewById(R.id.weibo_item_iv_contentImg);
                    holder.forwardContent = (TextView) convertView.findViewById(R.id.weibo_item_tv_forwardContent);
                    holder.forwardContentImg = (ImageView) convertView.findViewById(R.id.weibo_item_iv_forwardContentImg);
                    holder.from = (TextView) convertView.findViewById(R.id.weibo_item_tv_from);
                    holder.time = (TextView) convertView.findViewById(R.id.weibo_item_tv_time);
                    holder.retweetedLayout = convertView.findViewById(R.id.weibo_item_retweetedLayout);
                    convertView.setTag(holder);
                }
                else
                {
                    // 评论列表
                    commentHolder = new CommentViewHolder();
                    convertView = getLayoutInflater().inflate(R.layout.weibocomment_item, null);
                    commentHolder.headerImg = (ImageView) convertView.findViewById(R.id.weibocomment_item_iv_headerImg);
                    commentHolder.userName = (TextView) convertView.findViewById(R.id.weibocomment_item_tv_userName);
                    commentHolder.time = (TextView) convertView.findViewById(R.id.weibocomment_item_tv_time);
                    commentHolder.content = (TextView) convertView.findViewById(R.id.weibocomment_item_tv_content);
                    
                    convertView.setTag(commentHolder);
                }
            }
            else
            {
                if (type == VIEW_TYPE1)
                {
                    holder = (ViewHolder) convertView.getTag();
                }
                else
                {
                    commentHolder = (CommentViewHolder) convertView.getTag();
                }
            }
            
            WeiboJson weiboJson = mDataList.get(position);
            if (type == VIEW_TYPE1)
            {
                updataWeiboData(holder, weiboJson);
            }
            else
            {
                updateCommentData(commentHolder, weiboJson);
            }
            
            return convertView;
            
        }
        
        @Override
        public int getCount()
        {
            return mDataList.size();
        }
        
        @Override
        public int getItemViewType(int position)
        {
            if (position == 0)
            {
                return VIEW_TYPE1;
            }
            else
            {
                return VIEW_TYPE2;
            }
        }
        
        @Override
        public int getViewTypeCount()
        {
            
            return VIEW_TYPE_COUNT;
        }
        
        @Override
        public Object getItem(int position)
        {
            return mDataList.get(position);
        }
        
        @Override
        public long getItemId(int position)
        {
            return position;
        }
        
    }