使用外部主题文件在系统运行时更改应用主题 [英] Changing app theme at runtime using using external theme file

问题描述

我想产生一个单一的应用程序，它可以让用户选择一个主题，有这样的应用在整个应用程序。

I want to produce a single app that would let the user select a theme and have this applied over the entire app.

我明白，这可以通过使用的onCreate每一项活动的setTheme来实现。

I understand that this can be achieved by using setTheme in onCreate of each activity.

但我需要这个以不同的方式工作。我不想有存储在theme.xml或styles.xml主题。

But I need this to work in a different way. I don't want to have the themes stored in theme.xml or styles.xml.

我想有存储在网络上的主题的列表，并能够动态地下载新的主题，并把它在应用中的应用。我希望能够无需建立一个新的版本或应用程序的更新版本，以创建新的主题。

I want to have a list of themes stored on the web and be able to dynamically download a new theme and have it applied in the app. I want to be able to create new themes without having to build a new version or an updated version of the app.

图像很容易更换。从一个网址只要下载并存储在本地被重新使用。但应用程序的实际主题，按钮等的颜色，应在距theme.xml文件，该文件是不是APK的一部分，但在网上获取运行时改变。

Images would be easy to replace. Just download from a url and store locally to be re-used. But the actual theme of the app, the colours of buttons etc should be changed at run time from a theme.xml file which isn't part of the apk but is fetched online.

这可能吗？

推荐答案

这取决于你想要多少要造型能够做到。您目前不能设置视图中的项目样式进行编程使用资源的一面。但你可以控制的事情，如文本颜色和背景颜色。如果这是你需要改变，我会建议写一个主题工厂类为你的应用程序，你用它来得到你所需要的每个视图元素。例如，一个getButton函数将返回您所需要的背景颜色和文字颜色的按钮。

It depends how much styling you want to be able to do. You currently can't set view items styles programatically out side of using a resource. But you can control things like text color and background color. If that's all you need to change, I would recommend writing a Theme factory class for you app that you use to get each view element you need. For example a getButton function that will return you a button with the background color and text color you need.

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