(In the past, when learning listview, you often used listview and custom adapters. I saw Mr. Mars &# 39; These two days' teaching videos of expandablelistview only talk about the most basic use. I didn't say how to define my expandablelistview, so I want to make an analogy. In the previous listview, you defined an adapter yourself. The following is the procedure. In fact, it only implements the most basic customization. If users need, they can define more dazzling interface effects. Simple comments have been added to the code. If you have any questions, you can leave a message.)
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