ListView实现两种布局

package com.example.chat; import android.content.Context; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import java.util.List; public class ChatItemListViewAdapter extends BaseAdapter { private List<ChatItemListViewBean> mData; private LayoutInflater mInflater; public ChatItemListViewAdapter(Context context, List<ChatItemListViewBean> data) { this.mData = data; mInflater = LayoutInflater.from(context); } @Override public int getCount() { return mData.size(); } @Override public Object getItem(int position) { return mData.get(position); } @Override public long getItemId(int position) { return position; } @Override public int getItemViewType(int position) { ChatItemListViewBean bean = mData.get(position); return bean.getType(); } @Override public int getViewTypeCount() { return 2; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { if (getItemViewType(position) == 0) { holder = new ViewHolder(); convertView = mInflater.inflate(R.layout.chat_item_itemin, null); holder.icon = (ImageView) convertView.findViewById(R.id.icon_in); holder.text = (TextView) convertView.findViewById(R.id.text_in); } else { holder = new ViewHolder(); convertView = mInflater.inflate(R.layout.chat_item_itemout, null); holder.icon = (ImageView) convertView.findViewById(R.id.icon_out); holder.text = (TextView) convertView.findViewById(R.id.text_out); } convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } holder.icon.setImageBitmap(mData.get(position).getIcon()); holder.text.setText(mData.get(position).getText()); return convertView; } public final class ViewHolder { public ImageView icon; public TextView text; } }