Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.security.MessageDigest;
import android.content.Context;

import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;

public class Main {

    public static String getSignature(Context context) {
        PackageManager pm = context.getPackageManager();
        PackageInfo pi = null;
        StringBuilder builder = new StringBuilder();
        try {
            pi = pm.getPackageInfo(context.getPackageName(), PackageManager.GET_SIGNATURES);
            Signature[] signatures = pi.signatures;
            for (Signature signature : signatures) {
                builder.append(getMessageDigest(signature.toByteArray()));
            }
            return builder.toString();
        } catch (Exception e1) {
            e1.printStackTrace();
            return "";
        }
    }

    public static String getMessageDigest(byte[] paramArrayOfByte) {
        char[] arrayOfChar1 = { 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102 };
        String str;
        try {
            MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");
            localMessageDigest.update(paramArrayOfByte);
            byte[] arrayOfByte = localMessageDigest.digest();
            int i = arrayOfByte.length;
            char[] arrayOfChar2 = new char[i * 2];
            int j = 0;
            int k = 0;
            while (true) {
                if (j >= i) {
                    str = new String(arrayOfChar2);
                    break;
                }
                int m = arrayOfByte[j];
                int n = k + 1;
                arrayOfChar2[k] = arrayOfChar1[(0xF & m >>> 4)];
                k = n + 1;
                arrayOfChar2[n] = arrayOfChar1[(m & 0xF)];
                j++;
            }
        } catch (Exception localException) {
            str = null;
        }
        return str;
    }
}