Utils.java

package info.androiddevice.deviceinventory.info;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;

public class Utils {
    public static String readFile(String filename) throws Exception {
        return readFile(new File(filename));
    }

    public static String readFile(File file) throws Exception {
        FileInputStream fin = new FileInputStream(file);
        String result = readInputStream(fin);
        fin.close();
        return result;
    }

    public static String readInputStream(InputStream in) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(in));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = br.readLine()) != null) {
            sb.append(line).append("\n");
        }
        br.close();
        return sb.toString();

    }

    public static String byteToHexString(byte[] data) {
        StringBuilder buf = new StringBuilder();
        for (byte b : data) {
            int halfbyte = (b >>> 4) & 0x0F;
            int two_halfs = 0;
            do {
                buf.append((0 <= halfbyte) && (halfbyte <= 9) ? (char) ('0' + halfbyte) : (char) ('a' + (halfbyte - 10)));
                halfbyte = b & 0x0F;
            } while (two_halfs++ < 1);
        }
        return buf.toString();
    }
}