getWindow().getDecorView().findViewById(android.R.id.content).setPadding(0, 0, 0, getNavigationBarHeight());public int getNavigationBarHeight() {    boolean hasMenuKey = ViewConfiguration.get(this).hasPermanentMenuKey();    boolean hasBackKey = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);    if (!hasMenuKey && !hasBackKey) {      Resources resources = getResources();      int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android");      //獲取NavigationBar的高度      int height = resources.getDimensionPixelSize(resourceId);      return height;    } else {      return 0;    }  }