Android ListView item 不同布局实现

最重要的是在BaseAdapter里的getItemViewType();（为什么还待考虑）

直接上代码

public class ListAdapter extends BaseAdapter {
private Context mContext;
private static final int VIEWTYPTOP = 0;
private static final int VIEWTYPFIRST = 1;
private static final int VIEWTYPSECOND = 2;
private LayoutInflater mInflater = null;

public Adapter(Activity context) {
mContext = context;
mInflater = LayoutInflater.from(mContext);
}

@Override
public int getViewTypeCount() {
return 3;
}

/**
* 不同布局必须重写此方法
*/
@Override
public int getItemViewType(int position) {
if (position == 0) {
return VIEWTYPTOP;
} else {
if (position % 2 == 0) {
return VIEWTYPSECOND;
} else {
return VIEWTYPFIRST;
}
}
}

@Override
public int getCount() {
return 10;
}

@Override
public Object getItem(int arg0) {
return arg0;
}

@Override
public long getItemId(int arg0) {
return arg0;
}

@Override
public View getView(int position, View convertView, ViewGroup arg2) {

ViewHolder mHolder;
int type = getItemViewType(position);
System.out.println("getView " + position + " " + convertView + " type = " + type);
if (convertView == null) {
mHolder = new ViewHolder();
switch (type) {
case VIEWTYPTOP:
convertView = mInflater.inflate(R.layout.top_item,null);
mHolder.imgCentent = (ImageView) convertView.findViewById(R.id.img_top);
break;
case VIEWTYPFIRST:
convertView = mInflater.inflate(R.layout.first_item, null);
mHolder.imgCentent = (ImageView) convertView.findViewById(R.id.img_first_centent);
mHolder.imgLeft = (ImageView) convertView.findViewById(R.id.img_first_left);
mHolder.imgRight = (ImageView) convertView.findViewById(R.id.img_first_right);
mHolder.txtDate = (TextView) convertView.findViewById(R.id.txt_first_date);
mHolder.txtWeek = (TextView) convertView.findViewById(R.id.txt_first_week);
break;
case VIEWTYPSECOND:
convertView = mInflater.inflate(R.layout.second_item, null);
mHolder.imgCentent = (ImageView) convertView.findViewById(R.id.img_second_centent);
mHolder.imgLeft = (ImageView) convertView.findViewById(R.id.img_second_left);
mHolder.imgRight = (ImageView) convertView.findViewById(R.id.img_second_right);
mHolder.txtDate = (TextView) convertView.findViewById(R.id.txt_second_date);
mHolder.txtWeek = (TextView) convertView.findViewById(R.id.txt_second_week);
break;
default:
break;
}
convertView.setTag(mHolder);
} else {
mHolder = (ViewHolder) convertView.getTag();
}

switch (type) {
case VIEWTYPTOP:
　　
break;
case VIEWTYPFIRST:
　　mHolder.txtWeek.setText("星期四");
break;
default:
break;
}

return convertView;
}

class ViewHolder {
ImageView imgRight;
ImageView imgCentent;
ImageView imgLeft;
TextView txtDate;
TextView txtWeek;
}

}