Method getSizeUsed

app/src/main/java/eu/faircode/email/Helper.java:3194–3204

(File dir)

    }

    static long getSizeUsed(File dir) {
        long size = 0;
        File[] listed = dir.listFiles();
        if (listed != null)
            for (File file : listed)
                if (file.isDirectory())
                    size += getSizeUsed(file);
                else
                    size += file.length();
        return size;
    }

    static void openAdvanced(Context context, Intent intent) {
        // https://issuetracker.google.com/issues/72053350