改组适配器 [英] Shuffling an Adapter

问题描述

我正在使用Adapter:

final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
            android.R.layout.simple_list_item_1, android.R.id.text1);

，我想将其内容改组，但是我发现Collections.shuffle(adapter);不起作用.还有另一种方法可以做到这一点吗?保留adapter的格式，即不将其更改为List

and I want to shuffle the contents of it, however I discovered that Collections.shuffle(adapter); does not work. Is there another method to do this? While keeping the format of adapter i.e. not changing it to a List

推荐答案

当然Collections.shuffle(adapter)不起作用..shuffle需要一个java.util.List ... Java Collections API对Android API一无所知. ..

Of course Collections.shuffle(adapter) doesn't work..shuffle takes a java.util.List... The Java Collections API knows nothing about the Android API...

您需要重新整理基础列表，然后告诉适配器数据已更改..

You need to shuffle the underlying List and then then tell the adapter that the data has changed..something like:

Collections.shuffle(myList);
adapter.notifyDataSetChanged();

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