Adapter.NotifyDataSetChanged 不起作用 [英] Adapter.NotifyDataSetChanged doesn't work

问题描述

我的 listView 有适配器，我想使用 NotifyDataSetChanged() 更新我的适配器，但它对我不起作用.这就是我在适配器中添加数据的方式:

I have adapter for my listView and i want to update my adapter using NotifyDataSetChanged(), but it doesn't work for me. That's how I add data in my adapter:

if (Messages.Count != 0) {
    ChatAdapter = new BubbleAdapter (this, Messages);
    if(listViewChat.Adapter == null) {
        listViewChat.Adapter = ChatAdapter;
    } else {
        ChatAdapter.NotifyDataSetChanged();
    }
}

但是就像我说的它不起作用...如果我使用这种方式更新，我的 listView 会滚动到顶部:

But like I said it does not work... If i update using this way, my listView is scrolling to top:

ChatAdapter = new BubbleAdapter (this, Messages);
listViewChat.Adapter = ChatAdapter;

推荐答案

首先，我要感谢堆栈的每一位贡献者.我敢肯定，我欠你的感激不尽.

First and foremost, I would like to thank each and everyone of the contributors of stack. I'm sure I owe you more gratitude than I can give.

这个问题占用了我太多时间.对于仍在寻找解决方案的人:

This question has taken way too much of my time. For the folks that are still looking for a solution:

1. performFilter 应保持原样.

1. the performFilter should remain as is.

publishResults 应该像这样简单:

the publishResults should be as simple as:

mIngredientList = (ArrayList) results.values;适配器清除()；如果(mIngredientList ！= null){for (int i = 0; i < mIngredientList.size(); i++)适配器.添加(mIngredientList.get(i));}

mIngredientList = (ArrayList) results.values; adapter.clear(); if (mIngredientList != null) { for (int i = 0; i < mIngredientList.size(); i++) adapter.add(mIngredientList.get(i)); }

诀窍是这样的:public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

the trick is this: public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

mIngredientAdapter.getFilter().filter(charSequence.toString());mItemList.setAdapter(mIngredientAdapter);}不重新添加适配器，似乎不起作用.

mIngredientAdapter.getFilter().filter(charSequence.toString()); mItemList.setAdapter(mIngredientAdapter); } Not re-adding the adapter, doesn't seem to work.

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