以编程方式获取应用于活动的 Theme 值 [英] Get the Theme value applied for an activity programmatically

问题描述

我想知道应用程序中的 Activity 应用了哪个主题.

I want to know which theme is applied for an Activity in an application.

通常我们是通过使用来设置主题

Normally we are setting the theme by using

setTheme(android.R.style.Theme_Light);

这里我们指定了样式，这样我们就可以通过编程方式获得完全应用于活动的特定样式类型.

Here we are specifying style, As like this can we able to get the specific style type exactly applied for an activity programmatically.

谢谢

推荐答案

Context 类有一个很好的方法叫做 getThemeResId，但是它是私有的，因此你需要使用反射.

Context class has a nice method called getThemeResId, however it's private thus you need to use reflection.

这是一个例子:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_my);

    Log.e("TAG", "Def theme: " + R.style.AppTheme);
    Log.e("TAG", "Light theme: " + android.R.style.Theme_Light);
    Log.e("TAG", "Current theme id: " + getThemeId());

    setTheme(android.R.style.Theme_Light);
    Log.e("TAG", "Current theme id: " + getThemeId());
}

int getThemeId() {
    try {
        Class<?> wrapper = Context.class;
        Method method = wrapper.getMethod("getThemeResId");
        method.setAccessible(true);
        return (Integer) method.invoke(this);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return 0;
}

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