机器人：如何获取当前主题的资源ID？ [英] Android: How to obtain the resource ID of the current theme?

问题描述

在Android中，你可以得到一个活动从 getTheme（） Resource.Theme 对象的当前主题>。此外，您还可以设置主题，通过其他主题的资源ID一个不同的，如 setTheme（R.style.Theme_MyTheme）。

In Android, you can get the current theme of an activity as a Resource.Theme object from getTheme(). Also, you can set the theme to a different one via that other theme's resource id, as in setTheme(R.style.Theme_MyTheme).

但是，如何才能知道它是否是值得的 - 当前主题是否已经是我想要设置的呢？我在寻找类似 getTheme（）getResourceId（），才能写出这样的：

But how do I find out whether it's worth it -- whether the current theme is already the one that I would want to set? I am looking for something like getTheme().getResourceId(), in order to write something like:

protected void onResume() {
    int newThemeId = loadNewTheme();
    if (newThemeId != getTheme().getResourceId()) { // !!!! How to do this?
        setTheme(newThemeId);
        // and rebuild the gui, which is expensive
    }
}

任何想法？

推荐答案

确定这里有一个一块拼图：我们可以得到默认主题，如在AndroidManifest.xml中设置为 context.getApplicationInfo（）。主题为主题定在应用层面上，并从活动中，如 getPackageManager（）。getActivityInfo（getComponentName（），0）。主题该活动。

OK here's one puzzle piece: we can get the default theme, as set in the AndroidManifest.xml, as context.getApplicationInfo().theme for the theme set at application level, and from within an Activity, as getPackageManager().getActivityInfo(getComponentName(), 0).theme for that activity.

我想这给了我们一个起点，我们自己做包装，定制 getTheme（）和 setTheme（）。

I guess that gives us a starting point to do our own wrapper for a custom getTheme() and setTheme().

不过，感觉像工作的围绕的而不是与的的API。所以我会离开的问题公开，看看是否有人想出了一个更好的主意。

Still that feels like working around rather than with the API. So I'll leave the question open to see if someone comes up with a better idea.

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