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Android常数存放在哪里？

[英]Where do Android constants live?

原文 2012-03-19 00:24:55 6 1 java/ android/ constants

The documentation for LinearLayout gives the value for constants in the documentation. LinearLayout文档提供了文档中常量的值。 Can these be brought in from an existing package/namespace or do they need to be defined at the class or application level? 可以从现有的程序包/命名空间中引入它们吗，还是需要在类或应用程序级别上定义它们？

http://developer.android.com/reference/android/widget/LinearLayout.html#VERTICAL http://developer.android.com/reference/android/widget/LinearLayout.html#VERTICAL

1 个解决方案

In Java, constants are always (static) members of some class; 在Java中，常量始终是某个类的（静态）成员； in this case, android.widget.LinearLayout . 在这种情况下，为android.widget.LinearLayout 。 To refer to it, you would write LinearLayout.VERTICAL in your source code, after importing the class ( import android.widget.LinearLayout; ) at the top of the source file. 要引用它，您需要在源文件顶部的类（ import android.widget.LinearLayout; ） import android.widget.LinearLayout;后，在源代码中编写LinearLayout.VERTICAL 。 Or, if that is the only time you ever mention LinearLayout , you could write android.widget.LinearLayout.VERTICAL without any import, but this is uncommon style. 或者，如果这是您唯一一次提到LinearLayout ，那么您可以编写android.widget.LinearLayout.VERTICAL而不进行任何导入，但这是不常见的样式。