Android---Listview中的Item有2种以上类型时_android listview中元素能有两种形式吗?-优快云博客

本文链接：https://blog.youkuaiyun.com/wonghoman/article/details/24566855

本文介绍了一种在聊天应用中实现不同消息类型的视图展示方法，通过重写getItemViewType()和getViewTypeCount()来区分接收和发送的消息，并在getView()方法中根据不同类型加载对应的布局。

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重写：getItemViewType()和getViewTypeCount()

例子：

public static interface IMsgViewType
	{
		int IMVT_COM_MSG = 0;
		int IMVT_TO_MSG = 1;
	}
public int getItemViewType(int position) {
		// TODO Auto-generated method stub
	 	ChatMsgEntity entity = coll.get(position);
	 	
	 	if (entity.getMsgType())
	 	{
	 		return IMsgViewType.IMVT_COM_MSG;
	 	}else{
	 		return IMsgViewType.IMVT_TO_MSG;
	 	}
	 	
	}


	public int getViewTypeCount() {
		// TODO Auto-generated method stub
		return 2;
	}

重写getView时要注意：

public View getView(int position, View convertView, ViewGroup parent) {
    	
    	ChatMsgEntity entity = coll.get(position);
    	boolean isComMsg = entity.getMsgType();
    		
    	ViewHolder viewHolder = null;	
	    if (convertView == null)
	    {
	    	  if (isComMsg)
			  {
				  convertView = mInflater.inflate(R.layout.chatting_item_msg_text_left, null);
			  }else{
				  convertView = mInflater.inflate(R.layout.chatting_item_msg_text_right, null);
			  }

	    	  viewHolder = new ViewHolder();
			  viewHolder.tvSendTime = (TextView) convertView.findViewById(R.id.tv_sendtime);
			  viewHolder.tvUserName = (TextView) convertView.findViewById(R.id.tv_username);
			  viewHolder.tvContent = (TextView) convertView.findViewById(R.id.tv_chatcontent);
//			  viewHolder.isComMsg = isComMsg;
			  
			  convertView.setTag(viewHolder);
	    }else{
	        viewHolder = (ViewHolder) convertView.getTag();
	    }
	
	    viewHolder.tvSendTime.setText(entity.getDate());
	    viewHolder.tvUserName.setText(entity.getName());
	    viewHolder.tvContent.setText(entity.getText());
	    
	    return convertView;
    }