Android 如何隐藏图形布局中的元素？
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How to hide elements in graphical layout?
提问by eric.itzhak
I have items in my View which are displayd on click and does not show up on that start of the activity. Now everything works fine but when i use the graphical layout tool i see those items and it makes working with it harder.
我的视图中有项目在单击时显示，但在活动开始时不显示。现在一切正常，但是当我使用图形布局工具时，我看到了这些项目，这使得使用它变得更加困难。
Meaning, i have a ListView with items, i see those items on top of everything.
意思是，我有一个包含项目的 ListView，我看到这些项目位于一切之上。
How can i hide those elements? setting the visibility programaticlly dosen't help. Should i do something like setting alpha to 0 and then add it instead of making items invisible? Seems like a dumb idea, there must be some option i'm missing.
我怎样才能隐藏这些元素？以编程方式设置可见性无济于事。我应该做一些像将 alpha 设置为 0 然后添加它而不是使项目不可见的事情吗？似乎是一个愚蠢的想法，我一定缺少某些选项。
Help anyone?
帮助任何人？
Thanks, Eric
谢谢，埃里克
回答by MH.
Why not set the visibility to 'gone': android:visibility="gone"? That will prevent layout items from showing up andtaking up space in the layout.
为什么不将可见性设置为“消失”：android:visibility="gone"？这将防止布局项出现并占用布局中的空间。
Alternatively, if some elements in your view hierarchy may never be shown to the user at all, you could use ViewStubs to 'lazily' load them at runtime. A ViewStubis simply a placeholder for some other view (hierarchy) and is empty and zero-sized by itself. It's a good way of separating your view hierarchy into default and optional elements, and can potentialy reduce the complexity of the view hierarchy at runtime significantly.
或者，如果您的视图层次结构中的某些元素可能永远不会向用户显示，您可以使用ViewStubs 在运行时“延迟”加载它们。AViewStub只是其他视图（层次结构）的占位符，它本身是空的且大小为零。这是将视图层次结构分为默认元素和可选元素的好方法，并且可以在运行时显着降低视图层次结构的复杂性。
回答by ashack
If you want to hide the element programmatically / conditionally instead of in the layout XML as suggested above and setting the visibility wasn't working, perhaps your syntax was wrong? This is how you programmatically hide an element:
如果您想以编程方式/有条件地隐藏元素而不是按照上面的建议在布局 XML 中隐藏元素并且设置可见性不起作用，那么您的语法可能是错误的？这是您以编程方式隐藏元素的方式：
element.setVisibility(View.GONE);
![在 Android 的 textview [ Html.fromhtml() ] 中使用多种文本颜色](/res/img/loading.gif)