关于一个ListView使用多个item布局在优化时出现显示错乱的解决方案

一个很麻烦的问题，引用两个或者多个布局由于使用了ViewHolder和contenView做优化，页面在复用时出现要显示的内容错乱，经过上网查询和查谷歌官方的源码终于解决了这个问题
首先看下谷歌源码是怎么写的

这个是Adapter.class文件中的一段代码/**     * Get the type of View that will be created by {@link #getView} for the specified item.     *      * @param position The position of the item within the adapter's data set whose view type we     *        want.     * @return An integer representing the type of View. Two views should share the same type if one     *         can be converted to the other in {@link #getView}. Note: Integers must be in the     *         range 0 to {@link #getViewTypeCount} - 1. {@link #IGNORE_ITEM_VIEW_TYPE} can     *         also be returned.     * @see #IGNORE_ITEM_VIEW_TYPE     */    int getItemViewType(int position);

这个方法主要告诉我们自己可以设置传入item的类型并将类型指定到getView方法中。但是我这里面说道了getViewTypeCount这个

这个说的是我们可以设置返回将创建的视图类型的数量。 /**     * <p>     * Returns the number of types of Views that will be created by     * {@link #getView}. Each type represents a set of views that can be     * converted in {@link #getView}. If the adapter always returns the same     * type of View for all items, this method should return 1.     * </p>     * <p>     * This method will only be called when when the adapter is set on the     * the {@link AdapterView}.     * </p>     *      * @return The number of types of Views that will be created by this adapter     */    int getViewTypeCount();

下面看下我写的Adapter

public class AnswerAdapter extends BaseAdapter {    private Context context;    private List<Answer> list;     private static final int TYPE_LEFT = 1;       private static final int TYPE_RIGHT = 2;      public AnswerAdapter(Context context, List<Answer> list, int photo_id) {        this.context = context;        this.list = list;    }    @Override    public int getCount() {        return list.size();    }    @Override    public Answer getItem(int position) {        return list.get(position);    }    @Override    public long getItemId(int position) {        return position;    }      //默认值是1      @Override       public int getViewTypeCount() {           return 3;       }       //这里设置type类型     @Override       public int getItemViewType(int position) {           return list.get(position).getType();     }      @Override    public View getView(int position, View convertView, ViewGroup parent) {        final RightViewHolder rightviewHolder;        final LeftViewHolder leftviewHolder;        Answer answer = getItem(position);        if (convertView == null) {            switch (answer.getType()) {            case TYPE_LEFT:                convertView = View.inflate(context, R.layout.answer_left_item,null);                leftviewHolder = new LeftViewHolder();                leftviewHolder.lefttv = (TextView) convertView                        .findViewById(R.id.answer_tv);                convertView.setTag(leftviewHolder);                break;            case TYPE_RIGHT:                convertView = View.inflate(context, R.layout.answer_right_item,                        null);                rightviewHolder = new RightViewHolder();                rightviewHolder.righttv = (TextView) convertView                        .findViewById(R.id.answer_tv);                convertView.setTag(rightviewHolder);                break;            }        } else {            switch (answer.getType()) {            case TYPE_LEFT:                leftviewHolder = (LeftViewHolder) convertView.getTag();                leftviewHolder.lefttv.setText(answer.getBody());                break;            case TYPE_RIGHT:rightviewHolder=(RightViewHolder)convertView.getTag();  rightviewHolder.righttv.setText(answer.getBody());                  break;            }        }        return convertView;    }    class RightViewHolder {        TextView righttv;        TextView timetv;        ImageView rightimg;    }    class LeftViewHolder {        TextView lefttv;        TextView timetv;        ImageView leftimg;    }}

这样就解决了复用错乱的问题。但是还有一个问题，为什么我的listView第一次不初始化，必须上下滚动后才可以加载数据，有解决的一定要贴给我哦！！三克油