android - 包名以数字开头的规则是什么？

Question

Android 中的包命名约定是:

com.organizationName.appName

但是如果 organizationName 或 appName 以数字或下划线开头，它将成为无效名称，因为 android 不接受以数字或下划线开头的单词。

例如:

com.1organizationName.appName 无效

重命名此包的约定是什么？

Answer 1

在官方"Naming a Package" java文档，它有如下语句:

In some cases, the internet domain name may not be a valid package name. This can occur if the domain name contains a hyphen or other special character, if the package name begins with a digit or other character that is illegal to use as the beginning of a Java name, or if the package name contains a reserved Java keyword, such as "int". In this event, the suggested convention is to add an underscore.

因此在您的情况下，它将是 com._1organizationname.appname

编辑:刚在 Android docs 中找到这个:

A full Java-language-style package name for the application. The name should be unique. The name may contain uppercase or lowercase letters ('A' through 'Z'), numbers, and underscores ('_'). However, individual package name parts may only start with letters.

很明显，它不完全是 Java 风格的。不幸的是，在这种情况下，您最好的选择实际上是拼出数字，例如com.oneorganizationname.appname。