private static String getManufacturer() {
        try {
            String manufacturer = Build.MANUFACTURER;
            if (!TextUtils.isEmpty(manufacturer)) {
                return manufacturer.toLowerCase();
            }
        } catch (Throwable ignore) {/**/}
        return UNKNOWN;
    }
Return the rom's information.

@return the rom's information
app/src/main/java/com/example/jingbin/webviewstudy/utils/RomUtils.java