以编程方式切换应用程序范围的主题？

发布于 2024-10-11 05:37:19 字数 994 浏览 3 评论 0原文

我正在尝试获取用户选择的主题，但令人沮丧的是，我感觉很接近。在 AndroidManifest.xml 中定义主题可以正常工作，但是（据我所知）不能根据应用程序首选项进行更改：

<application 
    android:theme="@style/theme_sunshine" 
    android:icon="@drawable/icon" 
    android:label="@string/app_name">

或者，在每个活动中动态设置它也可以：

someChosenTheme = PreferenceManager.getDefaultSharedPreferences(this).getString("themePreference", "theme_twilight");
setTheme(someOtherChosenTheme);

但这似乎混乱，我宁愿将整个应用程序的主题设置在一个地方。我的第一个想法是在我的主要活动启动后立即获取应用程序上下文并在那里执行：

getApplicationContext().setTheme(R.style.theme_dummy);

据我所知， this 应该可以解决问题，但实际上它没有做任何事情 - 整个应用程序具有默认的 Android 风格。上述内容是否有效，如果有效，我可能会做其他愚蠢的事情吗？

如果这很重要的话，我正在 API 级别 3 工作。非常感谢正确方向的产品！

相关问题。

原文

I'm attempting to get a user-chosen theme and feel like I'm frustratingly close. Defining the theme in AndroidManifest.xml works as it should, but (as best I can tell) can't change based on app preferences:

<application 
    android:theme="@style/theme_sunshine" 
    android:icon="@drawable/icon" 
    android:label="@string/app_name">

Alternatively, setting it dynamically in each activity also works:

someChosenTheme = PreferenceManager.getDefaultSharedPreferences(this).getString("themePreference", "theme_twilight");
setTheme(someOtherChosenTheme);

But that seems messy, and I'd rather set the theme for the entire app in one place. My first thought was to grab the application context as soon as my main activity launches and do it there:

getApplicationContext().setTheme(R.style.theme_dummy);

As best I can tell, this ought to do the trick, but in fact it's not doing anything - the entire app has the default Android style. Is the above valid, and if so, might I be doing something else dumb?

I'm working in API level 3 if that matters. Prods in the right direction greatly appreciated!