activity 中設(shè)置

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if (hasFocus) {
//            int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE;
            int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN;
            uiFlags |= 0x00001000;
            getWindow().getDecorView().setSystemUiVisibility(uiFlags);
        } else {
            int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_FULLSCREEN;
            uiFlags |= 0x00001000;
            getWindow().getDecorView().setSystemUiVisibility(uiFlags);
        }
    }

dialog中設(shè)置

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {

        if (hasFocus){
            int uiFlags = View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                    | View.SYSTEM_UI_FLAG_FULLSCREEN;
            uiFlags |= 0x00001000;
            getWindow().getDecorView().setSystemUiVisibility(uiFlags);
        }

必須同時(shí)設(shè)置才生效