android - How to change/customize getItem method in custom array adapter?

Question

I want to make a custom getItem method in my custom adapter class. However, when I replace the default getItem with the custom one, I get an error that tells me tht I have to implement the default getItem method because I extend BaseAdapter. When I have both of them in there, it is still just returning null when I use it in my activity.

public ImageView getItem(int rowNum, int columnNum)
{
    return gridContent[rowNum][columnNum];
}

public Object getItem(int i)
{
    return null;
}

Answer 1

你有你的类扩展了 ArrayAdapter

在这种情况下，我相信的一种特定类型是 ImageView :-?

尝试这个 ：

 public T getItem(int rowNum, int columnNum)
      {
         return gridContent[rowNum][columnNum];
     }

Answer 2

它不起作用，我也有同样的问题。如果你想获取项目，你可以将你的项目保存到 HashMap 中，索引是位置。也许你可以使用 ArrayAdapter，但它只能执行简单的功能！public T getItem(int rowNum, int columnNum) { return gridContent[rowNum][columnNum]; }