为什么Android布局中的Fragment元素用小写的'f'书写? [英] Why is the Fragment element in Android layout written with a lower case 'f'?

问题描述

所有其他元素都以大写字母开头，例如RelativeLayout，TextView等.

All other elements start with an upper case letter, like RelativeLayout, TextView, etc.

是否存在将Fragment元素始终用作<fragment ... />而不是<Fragment ... />的特定原因?

Is there a particular reason why the Fragment element is always used as <fragment ... /> instead of <Fragment ... />?

推荐答案

以XML定义的片段实际上不是视图.已指定完整视图名称，或者该名称假定包为android.view并查找其余名称.但是，只有在包含android:name标签时才真正指定片段.它的行为就像一个关键字，通常用小写字母书写.因此，Fragment引用该类，而fragment是XML中片段的占位符.

Fragments when defined in XML aren't actually views. The full view name is specified, or it assumes android.view for the package and finds the rest. But a fragment is only truly specified when it includes the android:name tag. It acts like a keyword, which are typically written in lower case. Thus, Fragment refers to the class, and fragment is the placeholder in XML for fragments.

如安德鲁(Andrew)在评论中所述，任何特殊项目(例如<include>和<merge>)均以小写形式编写，因为它们不是android.view的.

As Andrew mentioned in the comments, any special item, such as <include> and <merge> are written in lower case, as they are not android.view's.

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