Question

@Override
public View getView(int position, View convertView, ViewGroup parent) 
{
    ViewHolder holder;
    if ( convertView == null ) 
    {
        holder = new ViewHolder();
        View custView = new CustomView(false,  this.getItem(position), mContext, position).getView();
        holder.customView = custView;
        custView.setTag( holder );
    }
    else
    {
        holder = (ViewHolder) convertView.getTag();
        custView = holder.customView;
    }
    return custView ;   
}



private static class ViewHolder 
{
    View customView;
}

这是CustomView的一部分：

    public View getView() {
        return mDataViewRoot;
    }

    public CustomView(boolean cameFromA, CustomDataClass customDataObject, Context ctx, int position) {
        super();
        this.cameFromA= cameFromA;
        this.customDataObject= customDataObject;
        this.mContext = ctx;
        this.mPosition = position;
        LayoutInflater inflater = LayoutInflater.from(ctx);
        mDataViewRoot = inflater.inflate(R.layout.view_root, null);
        mViewsHolder = (LinearLayout) mDataViewRoot.findViewById(R.id.data_holder);
        determineState(source);
        prepareView();
        handleCornerArea();
    }

我想为性能（和更好的设计）原因实现一个视图持有者。然而，它最终弄乱了我的列表，重复了视图..

Answer 1

我假设您在CustomView中设置视图数据。不要这样做，你需要在该适配器的getView方法中设置视图数据。

以下是使用视图持有者模式的正确方式：

web.config

编辑1：
如果您不想这样做，则必须将setter添加到CustomView并从getView方法调用它们。我想说的是你需要在getView方法中更新CustomView的数据，如果你没有，那么你得到的结果会发生什么......

编辑2：
您的视图持有者模式没有任何意义，您可以这样做：

@Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if ( convertView == null ) { holder = new ViewHolder(); // I don't know what you are doing with the boolean value, item or position... convertView = new CustomView(false, this.getItem(position), mContext, position).getView(); holder.mCustomViewsTextView = (TextView) convertView.findViewById(R.id.customTextView); convertView.setTag( holder ); } else { holder = (ViewHolder) convertView.getTag(); } holder.mCustomViewsTextView.setText = "Item position: " + position; return convertView; } private static class ViewHolder { TextView mCustomViewsTextView; // Other views that are in your CustomView // ... }

具有自定义视图的ViewHolder模式重复列表视图

1 个答案: