Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;

import java.io.UnsupportedEncodingException;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.content.Context;

import android.provider.Settings.Secure;

public class Main {
    /**
     * get hashed unique id of the device
     * 
     * @param context
     * @return
     * @throws UnsupportedEncodingException
     * @throws NoSuchAlgorithmException
     */
    public static String getHashId(Context context) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        String androidId = Secure.getString(context.getContentResolver(), Secure.ANDROID_ID);
        return SHA1(androidId);

    }

    /***
     * compute hash for text
     * 
     * @param text
     * @return
     * @throws NoSuchAlgorithmException
     * @throws UnsupportedEncodingException
     */
    public static String SHA1(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException {
        MessageDigest md = MessageDigest.getInstance("SHA-1");
        md.update(text.getBytes("iso-8859-1"), 0, text.length());
        byte[] sha1hash = md.digest();
        return convertToHex(sha1hash);
    }

    /**
     * convert bytes to hex
     * 
     * @param data
     * @return
     */
    private static String convertToHex(byte[] data) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
            int halfbyte = (data[i] >>> 4) & 0x0F;
            int two_halfs = 0;
            do {
                if ((0 <= halfbyte) && (halfbyte <= 9)) {
                    buf.append((char) ('0' + halfbyte));
                } else {
                    buf.append((char) ('a' + (halfbyte - 10)));
                }
                halfbyte = data[i] & 0x0F;
            } while (two_halfs++ < 1);
        }
        return buf.toString();
    }
}