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Lab3b_PermissionsLab:Android Coursera课程
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2021-05-10
08:19:13
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Lab3b_PermissionsLab Android coursera课程练习–权限目标:熟悉Android权限。 创建使用,定义和实施Android权限的应用程序。 练习A:使用权限本练习使用权限,以便它可以加载受保护的内容。 该应用程序称为Lab3b_PermissionsLab,其主要活动称为ActivityLoaderActivity。 该活动的用户界面显示一个标记为“书签活动”的按钮。 当用户单击此按钮时,应用程序将启动一个名为“ BookmarksActivity”的新活动。 该活动的用户界面如下所示。 此活动提供了一个TextView,它最初显示单词“ Bookmarks Go Here”。 它还显示了一个标有“获取书签”的按钮和另一个标有“转到危险活动”的按钮。 当用户按下“获取书签”按钮时,应用程序将检索用户的浏览器书签,然后将其显示在TextView中,如下所示。
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