gistfile0.txt

Kitkat での実行結果がこんなでつらい

D/hoge    ( 8203): "あ".getBytes(Shift_JIS).length = 1
D/hoge    ( 8203): "あい".getBytes(Shift_JIS).length = 3
D/hoge    ( 8203): "あいう".getBytes(Shift_JIS).length = 6
D/hoge    ( 8203): "あいうえ".getBytes(Shift_JIS).length = 8
D/hoge    ( 8203): "あいうえお".getBytes(Shift_JIS).length = 10

gistfile1.txt

private void test() {
    try {
        final Charset charset = Charset.forName("Shift-JIS");
        logByteLength("あ", charset);
        logByteLength("あい", charset);
        logByteLength("あいう", charset);
        logByteLength("あいうえ", charset);
        logByteLength("あいうえお", charset);
    } catch (UnsupportedEncodingException e) {
        Log.d("hoge", "", e);
    }
}

private void logByteLength(String str, Charset charset) {
    final byte[] bytes = str.getBytes(charset);
    Log.d("hoge", "\"" + str + "\".getBytes(" + charset.displayName() + ").length = " + bytes.length);
}

gistfile2.txt

gistfile3.txt のコードにするとこんなかんじ

D/hoge    (10513): byte count of Charset.forName("Shift_JIS").newEncoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE).encode("あ") = 1
D/hoge    (10513): byte count of Charset.forName("Shift_JIS").newEncoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE).encode("あい") = 3
D/hoge    (10513): byte count of Charset.forName("Shift_JIS").newEncoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE).encode("あいう") = 6
D/hoge    (10513): byte count of Charset.forName("Shift_JIS").newEncoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE).encode("あいうえ") = 8
D/hoge    (10513): byte count of Charset.forName("Shift_JIS").newEncoder().onMalformedInput(CodingErrorAction.REPLACE).onUnmappableCharacter(CodingErrorAction.REPLACE).encode("あいうえお") = 10

gistfile3.txt

private void logByteLength(String str, Charset charset) {
    try {
        final ByteBuffer buffer = charset.newEncoder()
                .onMalformedInput(CodingErrorAction.REPLACE)
                .onUnmappableCharacter(CodingErrorAction.REPLACE).encode(
                        CharBuffer.wrap(str));
        Log.d("hoge", "byte count of Charset.forName(\"" + charset.displayName() + "\").newEncoder()" +
                ".onMalformedInput(CodingErrorAction.REPLACE)" +
                ".onUnmappableCharacter(CodingErrorAction.REPLACE)" +
                ".encode(\"" + str + "\") = " + buffer.remaining());

    } catch (CharacterCodingException e) {
        throw new RuntimeException(e);
    }
}