Android 获取虚拟按键的高度

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public class ScreenUtils {

//获取虚拟按键的高度    public static int getNavigationBarHeight(Context context) {        int result = 0;        if (hasNavBar(context)) {            Resources res = context.getResources();            int resourceId = res.getIdentifier("navigation_bar_height", "dimen", "android");            if (resourceId > 0) {                result = res.getDimensionPixelSize(resourceId);            }        }        return result;    }    /**     * 检查是否存在虚拟按键栏     *     * @param context     * @return     */    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)    public static boolean hasNavBar(Context context) {        Resources res = context.getResources();        int resourceId = res.getIdentifier("config_showNavigationBar", "bool", "android");        if (resourceId != 0) {            boolean hasNav = res.getBoolean(resourceId);            // check override flag            String sNavBarOverride = getNavBarOverride();            if ("1".equals(sNavBarOverride)) {                hasNav = false;            } else if ("0".equals(sNavBarOverride)) {                hasNav = true;            }            return hasNav;        } else { // fallback            return !ViewConfiguration.get(context).hasPermanentMenuKey();        }    }    /**     * 判断虚拟按键栏是否重写     *     * @return     */    private static String getNavBarOverride() {        String sNavBarOverride = null;        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {            try {                Class c = Class.forName("android.os.SystemProperties");                Method m = c.getDeclaredMethod("get", String.class);                m.setAccessible(true);                sNavBarOverride = (String) m.invoke(null, "qemu.hw.mainkeys");            } catch (Throwable e) {            }        }        return sNavBarOverride;    }

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