What characters allowed in file names on Android?

1. On Android (at least by default) the file names encoded as UTF-8.

2. Looks like reserved file name characters depend on filesystem mounted (http://en.wikipedia.org/wiki/Filename).

I considered as reserved:

private static final String ReservedChars = "|\\?*<\":>+[]/'";

From android.os.FileUtils

    private static boolean isValidFatFilenameChar(char c) {
        if ((0x00 <= c && c <= 0x1f)) {
            return false;
        }
        switch (c) {
            case '"':
            case '*':
            case '/':
            case ':':
            case '<':
            case '>':
            case '?':
            case '\\':
            case '|':
            case 0x7F:
                return false;
            default:
                return true;
        }
    }

    private static boolean isValidExtFilenameChar(char c) {
        switch (c) {
            case '\0':
            case '/':
                return false;
            default:
                return true;
        }
    }

Note: FileUtils are hidden APIs (not for apps; for AOSP usage). Use as a reference (or by reflection at one's own risk)