ArrayAdapter.getPosition(项目)返回什么? [英] ArrayAdapter.getPosition(item) Returns What?
问题描述
我看文档说这个方法返回给定项目的位置,但你会做什么回报,如果没有这样的项目在一个ArrayAdapter?
I see the documentation says this method returns the position of the given item, but what would it return if no such item exists in the ArrayAdapter?
推荐答案
在翻翻源$ C $ C我发现一个ArrayAdapter使用的 List.indexOf(对象)
找对象,并且此方法返回-1,当它不存在。
After looking through the source code I've found that the ArrayAdapter uses List.indexOf(Object)
to find the object and this method returns -1 when it doesn't exist.
grep的code是真棒寻找东西时,文档是坏的,我用它至少每天一次:)
GrepCode is awesome for finding stuff when the documentation is bad, I use it at least once a day :)
来源:<一href="http://grep$c$c.com/file/repository.grep$c$c.com/java/ext/com.google.android/android/5.0.2_r1/android/widget/ArrayAdapter.java#ArrayAdapter.getPosition%28java.lang.Object%29"相对=nofollow> grep的code
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