//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; }

}