忽略OnItemSelectedListener射击创建 [英] ignore OnItemSelectedListener firing on create

问题描述

我创建一个微调，我已经添加了一个 OnItemSelectedListener 给它。 不过，我已经注意到，它触发上创建。 现在，我想知道是否有办法忽略/丢弃它。

I'm creating a spinner and I've added an OnItemSelectedListener to it. However I've noticed that it fires on create. Now I was wondering if there was a way to ignore/discard it.

我知道我可以使用布尔的价值，但是这是一个有点脏。

I know I could use a boolean value, but that's a bit "dirty".

推荐答案

您不应试图prevent在调用 OnItemSelectedListener 。

You should not attempt to prevent the call to the OnItemSelectedListener.

在默认情况下，Android的纱厂选择由适配器返回的第一个项目，因此 OnItemSelectedListener 被调用来触发该项目的一些动作。

By default, Android Spinners select the first item returned by the Adapter, and therefore the OnItemSelectedListener is called to trigger some action on that item.

我会建议，在您的微调适配器的第一个项目是一个空白的项目，你的 OnItemSelectedListener 可以根据ID忽略空白项。

I would advise that the first item in your Spinner Adapter be a blank item, and your OnItemSelectedListener can ignore that blank item based on its id.

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