android学习:自动识别文本文件编码格式

    /**
     * 判断文件的编码格式
     * @param fileName :file
     * @return 文件编码格式
     * @throws Exception
     */
    public static String codeString(String fileName) throws Exception{
        BufferedInputStream bin = new BufferedInputStream(
        new FileInputStream(fileName));
        int p = (bin.read() << 8) + bin.read();
        String code = null;

        switch (p) {
            case 0xefbb:
                code = "UTF-8";
                break;
            case 0xfffe:
                code = "Unicode";
                break;
            case 0xfeff:
                code = "UTF-16BE";
                break;
            default:
                code = "GBK";
        }

        return code;
    }

有了这个函数，妈妈再也不用担心我的文本文件打开是乱码了,O(∩_∩)O哈哈~