public View getView(int position, View convertView, ViewGroup parent) {
        convertView = LayoutInflater.from(context).inflate(R.layout.item, null);
 
        AbsListView.LayoutParams param = new AbsListView.LayoutParams(
                android.view.ViewGroup.LayoutParams.FILL_PARENT,
                mGv.getHeight()/ROW_NUMBER);//传入自己需要的宽高       
　　　　　　　　   convertView.setLayoutParams(param);
 
        return convertView;
    }