Android的ListView的每一个Item都有不同的布局

来源：互联网发布：windows caffe mnist 编辑：程序博客网时间：2024/06/07 13:41

大家都知道，ListView中的数据是经过adapter适配到屏幕上的，所以要实现listview中每一个item的内容需要去操作adapter中的代码：

在使用不同布局的时候我们要重构以下两个方法：getItemViewType和getViewTypeCount.

public class MyAdapter extends BaseAdapter {    ArrayList<String> ls;    Context mContext;    LinearLayout linearLayout = null;    LayoutInflater inflater;    TextView tex;    final int VIEW_TYPE = 3;    final int TYPE_1 = 0;    final int TYPE_2 = 1;    final int TYPE_3 = 2;    public MyAdapter(ArrayList<String> list, Context context) {        mContext = context;        ls = list;    }    @Override    public int getItemViewType(int position) {        return super.getItemViewType(position);    }    @Override    public int getViewTypeCount() {        return 3;    }    @Override    public int getCount() {        return ls.size();    }    @Override    public Object getItem(int position) {        return ls.get(position);    }    @Override    public long getItemId(int position) {        return 0;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        ViewHolder1 holder1 = null;        ViewHolder2 holder2 = null;        ViewHolder3 holder3 = null;        int type = getItemViewType(position);        if (convertView == null) {            inflater = LayoutInflater.from(mContext);            switch (type) {                case TYPE_1:                    convertView = inflater.inflate(R.layout.layout_item1, parent, false);                    holder1 = new ViewHolder1();                    holder1.tv1 = (TextView) convertView.findViewById(R.id.tv1);                    convertView.setTag(holder1);                    break;                case TYPE_2:                    convertView = inflater.inflate(R.layout.layout_item2, parent, false);                    holder2 = new ViewHolder2();                    holder2.tv2 = (TextView) convertView.findViewById(R.id.tv2);                    convertView.setTag(holder2);                    break;                case TYPE_3:                    convertView = inflater.inflate(R.layout.layout_item3,parent,false);                    holder3 = new ViewHolder3();                    holder3.tv3 = (TextView)convertView.findViewById(R.id.tv3);                    convertView.setTag(holder3);            }        }else{            switch (type){                case TYPE_1:                    holder1 = (ViewHolder1)convertView.getTag();                    break;                case TYPE_2:                    holder2 = (ViewHolder2)convertView.getTag();                    break;                case TYPE_3:                    holder3 = (ViewHolder3)convertView.getTag();                    break;            }        }        switch (type){            case TYPE_1:                holder1.tv1.setText("我是第一个"+(position + 1));                break;            case TYPE_2:                holder2.tv2.setText("我是第二个"+(position + 1));                break;            case TYPE_3:                holder3.tv3.setText("我是三个"+(position + 1));                break;        }        return convertView;    }    public static class ViewHolder1 {        TextView tv1;    }    public static class ViewHolder2 {        TextView tv2;    }    public static class ViewHolder3 {        TextView tv3;    }}

创建不同的ViewHolder，通过调用返回的type类型来确定是哪一个item就可以了。

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