我这样做是为了自己，这个帮手方法应该对其他人有用:

private static final int[] RES_IDS_ACTION_BAR_SIZE = {R.attr.actionBarSize};

/**
 * Calculates the Action Bar height in pixels.
 */
public static int calculateActionBarSize(Context context) {
    if (context == null) {
        return 0;
    }

    Resources.Theme curTheme = context.getTheme();
    if (curTheme == null) {
        return 0;
    }

    TypedArray att = curTheme.obtainStyledAttributes(RES_IDS_ACTION_BAR_SIZE);
    if (att == null) {
        return 0;
    }

    float size = att.getDimension(0, 0);
    att.recycle();
    return (int) size;
}

为了获得动作栏的实际高度，你必须在运行时解析actionBarSize属性。

TypedValue tv = new TypedValue();
context.getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true);
int actionBarHeight = getResources().getDimensionPixelSize(tv.resourceId);

Kotlin接受答案:

val Context.actionBarSize
    get() = theme.obtainStyledAttributes(intArrayOf(android.R.attr.actionBarSize))
        .let { attrs -> attrs.getDimension(0, 0F).toInt().also { attrs.recycle() } }

用法:

val size = actionBarSize                    // Inside Activity
val size = requireContext().actionBarSize   // Inside Fragment
val size = anyView.context.actionBarSize    // Inside RecyclerView ViewHolder

蜂窝样本之一是指?android:attr/actionBarSize

public int getActionBarHeight() {
    int actionBarHeight = 0;
    TypedValue tv = new TypedValue();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
        if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv,
                true))
            actionBarHeight = TypedValue.complexToDimensionPixelSize(
                    tv.data, getResources().getDisplayMetrics());
    } else {
        actionBarHeight = TypedValue.complexToDimensionPixelSize(tv.data,
                getResources().getDisplayMetrics());
    }
    return actionBarHeight;
}

在Android 3.2的framework-res.apk的反编译源代码中，res/values/styles.xml包含:

<style name="Theme.Holo">
    <!-- ... -->
    <item name="actionBarSize">56.0dip</item>
    <!-- ... -->
</style>

3.0和3.1似乎是一样的(至少从AOSP来看)…