HelloStranger

package com.utils;

import java.io.BufferedReader; import java.io.FileReader; import java.io.IOException;

public class ChipInfo {

private static final String CPU_INFO = "/proc/cpuinfo";
private static final String SERIAL = "serial";
private static final String SPLIT = ":";

/**
 * Get the Chip ID in string of hex
 * @return the chip id string of hex
 */
public static String getChipIDHex() {
    
    String chipSerial = null;
    FileReader fr = null;
    BufferedReader br = null;
    try {
        fr = new FileReader(CPU_INFO);
        br = new BufferedReader(fr);

        String readline = null;

        while ((readline = br.readLine()) != null) {
            if (readline.trim().toLowerCase().startsWith(SERIAL)) {
                chipSerial = readline;
                break;
            }
        }
    } catch (IOException io) {
        return null;
    } finally {
        if (fr != null) {
            try {
                fr.close();
            } catch (IOException e) {
            }
        }
        if (br != null) {
            try {
                br.close();
            } catch (IOException e) {
            }
        }
    }

    String serialSplit[] = chipSerial != null ? chipSerial.split(SPLIT) : null;
    if(serialSplit != null &&  serialSplit.length == 2){
        return serialSplit[1].trim();
    }
    return null;
}

/**
 * Get the Chip ID in string of 128 bits
 * @return the chip id string of 128 bits
 */
public static String getChipID() {
    StringBuilder chipId = new StringBuilder();
    int intValue = 0;

    try {
        String hexString = getChipIDHex();
        int hexLen = hexString.length();
        for (int i = 0; i < hexLen; i++) {
            int k;
            intValue = Integer.parseInt(hexString.substring(i, i + 1), 16);

            k = (intValue & 8) >> 3;
            chipId.append(k);

            k = (intValue & 4) >> 2;
            chipId.append(k);

            k = (intValue & 2) >> 1;
            chipId.append(k);

            k = intValue & 1;
            chipId.append(k);
        }
    } catch (Exception e) {
        return null;
    }

    return chipId.toString();
}

}