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16位无符号数(unsigned short)转10进制：//信号强度采用16位无符号数(unsigned short)，数值越大信号越强, 单位db
0x00,0x19 -> 25db
16位unsigned short为2Byte，且无符号，则为0*16^3 + 0*16^2 + 1*16^1 + 9*16^0 = 25
思路是：(0x00,0x19)对应的高位为num[high]=0x00=0，低位为num[low]=0x19=25，要先把(0,25)->(0019)-,然后再计算结果。
//0x00,0x19 -> 入参为：0,25
private String toHexStr(int highByte, int lowByte){
StringBuilder sb = new StringBuilder();
if (highByte > 0) {
String high = Integer.toHexString(highByte);
if (high.length() < 2) {
sb.append('0').append(high);
} else {
sb.append(high);
}
} else {
sb.append("00");
}
if (lowByte > 0) {
String low = Integer.toHexString(lowByte);
if (low.length() < 2) {
sb.append('0').append(low);
} else {
sb.append(low);
}
} else {
sb.append("00");
}
return sb.toString();
}
//16进制的字符串 转 10进制的数
private int toDexNum(String hexStr){
int num = 0;
int numLen = hexStr.length();
for(int i = 0; i < numLen; i++) {
int temp1 = hexChar2DexNum(hexStr.charAt(i));
int temp2 = (int)Math.pow(16, numLen-i-1);
num += temp1 * temp2;
}
// Log.d(TAG, "toUnsignedShort: " + num + ", " + hexStr);
return num;
}
//16进制的字符 转 10进制的数
private int hexChar2DexNum(char ch){
ch = Character.toLowerCase(ch);
int temp = 0;
if (ch >= '0' && ch <= '9'){
temp = ch - '0';
} else if (ch >= 'a' && ch <= 'f'){
temp = ch - 'a' + 10;
}
// Log.d(TAG, "hexChar2DexNum: ch " + ch + ", num = " + temp);
return temp;
}
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