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I know there's an attribute for the color of each somewhere in the theme, but I just can't seem to find it.

我知道主题中的每个颜色都有一个属性，但我似乎找不到它。

Item number 1

The attribute you'll want is activatedBackgroundIndicator.

您想要的属性是activatedBackgroundIndicator。

As per the docs

按照文档

Drawable used as a background for activated items.

可绘制的，用作激活项的背景。

Reason being

原因是

The layout used for each header item in a PreferenceActivity is preference_header_item_material which uses the activatedBackgroundIndicator as a background. You'll need a selector for this attribute, something like:

PreferenceActivity中用于每个标题项的布局是preference_header_item_material，它使用激活的backgroundindicator作为背景。这个属性需要一个选择器，比如:

<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_activated="true"><color android:color="yourColor" />
    </item>
    <item><color android:color="@android:color/transparent" />
    </item>

</selector>

Item number 2

This item is slightly trickier. It's not a PreferenceScreen like you suggested in the other answer, but the FragmentBreadCrumbs title. Unfortunately, the title color cannot be set using a theme because the attribute used to style it is private internal.

这个项目稍微有点复杂。它不是你在另一个答案中建议的首选项，而是fragmentbread碎屑标题。不幸的是，不能使用主题设置标题颜色，因为用于样式化标题的属性是内部的私有属性。

You can however set the text color using Reflection or just by traversing the breadcrumb's view hierarchy until you find the TextView used to display the title.

但是，您可以使用反射或仅仅通过遍历breadcrumb的视图层次结构来设置文本颜色，直到找到用于显示标题的TextView。

The layout used to display the content in each PreferenceActivity is preference_list_content_material which includes the breadcrumbs_in_fragment_material layout to display each breadcrumb. You can see from that layout that the id of each FragmentBreadCrums is android:id/title. Now we can use this id to find the breadcrumb and adjust the the TextView inside it.

用于在每个PreferenceActivity中显示内容的布局是preference_list_content_material，它包含用于显示每个面包屑的breadcrumbs_in_fragment_material布局。从这个布局中可以看出，每个FragmentBreadCrums的id都是android:id/title。现在我们可以使用这个id查找面包屑并调整其中的TextView。

Using Reflection

使用反射

@Override
public void onBuildHeaders(List<Header> target) {
    super.onBuildHeaders(target);
    loadHeadersFromResource(R.xml.yourPreferenceHeaders, target);

    final View breadcrumb = findViewById(android.R.id.title);
    if (breadcrumb == null) {
        // Single pane layout
        return;
    }

    try {
        final Field titleColor = breadcrumb.getClass().getDeclaredField("mTextColor");
        titleColor.setAccessible(true);
        titleColor.setInt(breadcrumb, yourTitleColor);
    } catch (final Exception ignored) {
        // Nothing to do
    }

}

Traversing the view hierarchy

遍历视图层次

Using View.findViewsWithText is an easy way to handle this.

使用视图。findViewsWithText是一种简单的处理方法。

    breadcrumb.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

        @Override
        public void onGlobalLayout() {
            breadcrumb.getViewTreeObserver().removeOnGlobalLayoutListener(this);

            final ArrayList<View> outViews = Lists.newArrayList();
            breadcrumb.findViewsWithText(outViews, getString(R.string.your_header_title),
                    View.FIND_VIEWS_WITH_TEXT);

            ((TextView) outViews.get(0)).setTextColor(yourTitleColor);
        }

    });

Results

0  

I have modified the suggested solution, now it works perfectly also for screen rotations.

我已经修改了建议的解决方案，现在它也可以很好地用于屏幕旋转。

In the base Activity class for our preferences we have to do the following:

在我们的首选项的基本活动类中，我们必须做以下工作:

@Override
public View onCreateView(String name, Context context, AttributeSet attrs)
{
    if ("android.app.FragmentBreadCrumbs".equals(name))
    {
        final View title = new android.app.FragmentBreadCrumbs(context, attrs);
        try {
            final Field titleColor = title.getClass().getDeclaredField("mTextColor");
            titleColor.setAccessible(true);
            titleColor.setInt(title, title_color));
        } catch (final Exception ignored) {
            // Nothing to do
        }
        return title;
    }
    return super.onCreateView(name, context, attrs);
}

and that's it.

就是这样。