Chinese garbled problem of converting Android strings and hexadecimal into each other

import ;
/**
 * Created by Administrator on 2016/2/2.
 * ---------------------------
 * -------------------------------------------------------------------------------------------------------------------------------
 */
public class StringToSixthUtils {
private static String hexString = "0123456789abcdef";
/*
 * Encode the string into hexadecimal digits, suitable for all characters (including Chinese)
 */
public static String encode(String str) {
//Get byte array according to the default encodingbyte[] bytes = ();
StringBuilder sb = new StringBuilder( * 2);
//Disassemble each byte in the byte array into a 2-bit hexadecimal integerfor (int i = 0; i < ; i++) {
(((bytes[i] & 0xf0) >> 4));
(((bytes[i] & 0x0f)));
}
return ();
}
/*
 * Decode hexadecimal numbers into strings, suitable for all characters (including Chinese)
 */
public static String decode(String bytes) {
ByteArrayOutputStream baos = new ByteArrayOutputStream(() / 2);
//Assemble each 2-bit hexadecimal integer into one bytefor (int i = 0; i < (); i += 2)
((((i)) << 4 | ((i + 1))));
return new String(());
}
}

package ; 
public class NumberChange { 
/*
 * Convert hex string into byte array @param hex @return
 */ 
public static byte[] hexStringToByte(String hex) { 
int len = (() / 2); 
byte[] result = new byte[len]; 
char[] achar = (); 
for (int i = 0; i < len; i++) { 
int pos = i * 2; 
result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1])); 
} 
return result; 
} 
private static byte toByte(char c) { 
byte b = (byte) "0123456789ABCDEF".indexOf(c); 
return b; 
} 
/**
 * Convert byte array into hexadecimal string
 *
 * @param bArray
 * @return
 */ 
public static final String bytesToHexString(byte[] bArray) { 
StringBuffer sb = new StringBuffer(); 
String sTemp; 
for (int i = 0; i < ; i++) { 
sTemp = (0xFF & bArray[i]); 
if (() < 2) 
(0); 
(()); 
} 
return (); 
} 
/**
 * @function function: convert BCD code into decimal string (Arabic data)
 * @Input parameters: BCD code
 * @Output result: Decimal string
 */ 
public static String bcd2Str(byte[] bytes) { 
StringBuffer temp = new StringBuffer( * 2); 
for (int i = 0; i < ; i++) { 
((byte) ((bytes[i] & 0xf0) >>> 4)); 
((byte) (bytes[i] & 0x0f)); 
} 
return ().substring(0, 1).equalsIgnoreCase("0") ? ().substring(1) : (); 
} 
/**
 * @function function: convert decimal string to BCD code
 * @Input parameters: decimal string
 * @Output result: BCD code
 */ 
public static byte[] str2Bcd(String asc) { 
int len = (); 
int mod = len % 2; 
if (mod != 0) { 
asc = "0" + asc; 
len = (); 
} 
byte abt[] = new byte[len]; 
if (len >= 2) { 
len = len / 2; 
} 
byte bbt[] = new byte[len]; 
abt = (); 
int j, k; 
for (int p = 0; p < () / 2; p++) { 
if ((abt[2 * p] >= '0') && (abt[2 * p] <= '9')) { 
j = abt[2 * p] - '0'; 
} else if ((abt[2 * p] >= 'a') && (abt[2 * p] <= 'z')) { 
j = abt[2 * p] - 'a' + 0x0a; 
} else { 
j = abt[2 * p] - 'A' + 0x0a; 
} 
if ((abt[2 * p + 1] >= '0') && (abt[2 * p + 1] <= '9')) { 
k = abt[2 * p + 1] - '0'; 
} else if ((abt[2 * p + 1] >= 'a') && (abt[2 * p + 1] <= 'z')) { 
k = abt[2 * p + 1] - 'a' + 0x0a; 
} else { 
k = abt[2 * p + 1] - 'A' + 0x0a; 
} 
int a = (j << 4) + k; 
byte b = (byte) a; 
bbt[p] = b; 
} 
return bbt; 
} 
public static void main(String[] arg) { 
/** 
* 68 65 6C 6C 6 F 0A 
* C4 E3 BA C3 
*/ 
String[] str = {"C4", "E3", "BA", "C3"}; 
// String[] str = {"7E","02","04","00","07","10","00","00","00","00","13","08","4F","01","0B","0B","15","10","14","13","44","7E"}; 
byte[] b = new byte[]; 
for(int i=0;i<;i++){ 
b[i] = hexStringToByte(str[i])[0]; 
} 
(new String(b)); 
String strC ="Hello"; 
String bth=bytesToHexString(()); 
(bth); 
(Short.MAX_VALUE); 
((280)); 
} 
}