USB-OTG连接Demo

package com.jove.demo.utils; import java.nio.charset.Charset; import java.util.List; public class ByteHelper { /** * 字节数组加1 */ public static synchronized byte[] BytesPP(byte[] source) { byte[] result = new byte[2]; if (source[0] == (byte) 0xFF && source[1] == (byte) 0xFF) { result = new byte[]{(byte) 0x00, (byte) 0x00}; } else if (source[1] == (byte) 0xFF) { result[0] = (byte) (source[0] + 1); result[1] = (byte) 0x00; } else { result[0] = source[0]; result[1] = (byte) (source[1] + 1); } return result; } /** * 合并两个字节数组 */ public static byte[] Composite2Bytes(byte[] bytesA, byte[] bytesB) { byte[] result = new byte[bytesA.length + bytesB.length]; System.arraycopy(bytesA, 0, result, 0, bytesA.length); System.arraycopy(bytesB, 0, result, bytesA.length, bytesB.length); return result; } /** * 合并多个字节数组 */ public static byte[] CompositeBytes(List<byte[]> list) { byte[] result = null; for (int i = 0; i < list.size(); i++) { byte[] temp; if (null == result) { temp = new byte[]{}; } else { temp = result; } result = Composite2Bytes(temp, list.get(i)); } return result; } /** * byte[]倒序 */ public static byte[] ReverseBytes(byte[] b) { byte[] result = new byte[b.length]; for (int i = 0; i < b.length; i++) { result[b.length - 1 - i] = b[i]; } return result; } // /** // * 将byte[]转换为2进制数组成的字符串 // * // * @param b // * @return // */ // public static String BytesToBinaryString(byte[] b) { // String temp = new BigInteger(1, b).toString(2); // int total = 8 * b.length; // int dif = total - temp.length(); // StringBuffer sb = new StringBuffer(); // for (int i = 0; i < dif; i++) { // sb.append("0"); // } // return sb.append(temp).toString(); // } /** * 将byte[]转换为2进制数组成的字符串（每个字节倒序） */ public static String BytesToBinaryString(byte[] b) { StringBuilder sb = new StringBuilder(); for (int i = 0; i < b.length; i++) { sb.append(ByteToBinaryString(b[i])); } return sb.toString(); } /** * Byte转2进制数组成的字符串（倒序） */ public static String ByteToBinaryString(byte b) { return "" + (byte) ((b >> 0) & 0x1) + (byte) ((b >> 1) & 0x1) + (byte) ((b >> 2) & 0x1) + (byte) ((b >> 3) & 0x1) + (byte) ((b >> 4) & 0x1) + (byte) ((b >> 5) & 0x1) + (byte) ((b >> 6) & 0x1) + (byte) ((b >> 7) & 0x1); } /** * 将byte[]转换为16进制数组成的字符串 */ public static String BytesToHexString(byte[] b, int length) { StringBuilder result = new StringBuilder(); for (int i = 0; i < length; i++) { String hex = Integer.toHexString(b[i] & 0xFF); if (hex.length() == 1) { hex = '0' + hex; } result.append(hex.toUpperCase()); } return result.toString(); } /** * 将byte[]转换为16进制数组成的字符串 */ public static String BytesToHexString(byte[] b) { return BytesToHexString(b, b.length); } private static byte toByte(char c) { byte b = (byte) "0123456789ABCDEF".indexOf(c); return b; } /** * 将16进制数组成的字符串转换为byte[] */ public static byte[] HexStringToBytes(String hex) { int len = (hex.length() / 2); byte[] result = new byte[len]; char[] achar = hex.toCharArray(); for (int i = 0; i < len; i++) { int pos = i * 2; result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1])); } return result; } /** * char转byte[] */ public static byte[] CharToBytes(char c) { byte[] b = new byte[2]; b[0] = (byte) ((c & 0xFF00) >> 8); b[1] = (byte) (c & 0xFF); return b; } /** * byte[]转char */ public static char BytesToChar(byte[] b) { char c = (char) (((b[0] & 0xFF) << 8) | (b[1] & 0xFF)); return c; } /** * byte[]转String(gb2312编码) */ public static String BytesToString(byte[] b) { return new String(b, Charset.forName("gb2312")).trim(); } /** * String转byte[](gb2312编码) */ public static byte[] StringToBytes(String s) { return s.getBytes(Charset.forName("gb2312")); } /** * String转byte[]，并补0(gb2312编码) */ public static byte[] StringToBytes(String s, int length) { byte[] b = StringToBytes(s); if (b.length > length) { return null; } byte[] temp = new byte[length - b.length]; return Composite2Bytes(b, temp); } /** * 将int数值转换为byte */ public static byte IntToByte(int value) { return (byte) ((value & 0xFF)); } /** * 将int数值转换为占1个字节的byte数组 * * @param value 要转换的int值 * @return byte数组 */ public static byte[] IntToBytes(int value) { byte[] byte_src = new byte[1]; byte_src[0] = (byte) ((value & 0xFF)); return byte_src; } /** * int转2字节数组(高位在前，低位在后) */ public static byte[] IntToBytes2(int value) { byte[] src = new byte[2]; src[0] = (byte) ((value >> 8) & 0xFF); src[1] = (byte) (value & 0xFF); return src; } /** * int转4字节数组(高位在前，低位在后) */ public static byte[] IntToBytes4(int value) { byte[] src = new byte[4]; src[0] = (byte) ((value >> 24) & 0xFF); src[1] = (byte) ((value >> 16) & 0xFF); src[2] = (byte) ((value >> 8) & 0xFF); src[3] = (byte) (value & 0xFF); return src; } /** * 4字节数组转int(高位在前，低位在后) */ public static int Bytes4ToInt(byte[] src) { int value; value = (((src[0] & 0xFF) << 24) | ((src[1] & 0xFF) << 16) | ((src[2] & 0xFF) << 8) | (src[3] & 0xFF)); return value; } /** * 浮点转换为字节 */ public static byte[] FloatToBytes4(float f) { // 把float转换为byte[] int fbit = Float.floatToIntBits(f); byte[] b = new byte[4]; for (int i = 0; i < 4; i++) { b[i] = (byte) (fbit >> (24 - i * 8)); } return b; } /** * 字节转换为浮点 * * @param b 字节 */ public static float Bytes4ToFloat(byte[] b) { // int l; // l = b[0]; // l &= 0xff; // l |= ((long) b[1] << 8); // l &= 0xffff; // l |= ((long) b[2] << 16); // l &= 0xffffff; // l |= ((long) b[3] << 24); int accum = 0; accum = accum | (b[0] & 0xff) << 24; accum = accum | (b[1] & 0xff) << 16; accum = accum | (b[2] & 0xff) << 8; accum = accum | (b[3] & 0xff); return Float.intBitsToFloat(accum); } /** * 2字节数组转int(高位在前，低位在后) */ public static int Bytes2ToInt(byte[] src) { int value; value = (((src[0] & 0xFF) << 8) | ((src[1] & 0xFF))); return value; } /** * byte[]中7D转7D5D */ public static byte[] Bytes7D(byte[] bytes) { byte[] result; int offset = 0;//偏移量 for (int i = 0; i < bytes.length; i++) { if ((byte) 0x7D == bytes[i]) { offset++; } } if (0 == offset) { return bytes; } result = new byte[bytes.length + offset]; offset = 0; for (int i = 0; i < bytes.length; i++) { if ((byte) 0x7D == bytes[i]) { result[i + offset] = (byte) 0x7D; result[i + offset + 1] = (byte) 0x5D; offset++; } else { result[i + offset] = bytes[i]; } } return result; } /** * byte[]中7E转7D5E */ public s