Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import android.content.Context;

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

import java.security.MessageDigest;

public class Main {

    public static String getSign(Context context, String pkgName) {
        try {
            PackageInfo pis = context.getPackageManager().getPackageInfo(pkgName, PackageManager.GET_SIGNATURES);
            return hexdigest(pis.signatures[0].toByteArray());
        } catch (NameNotFoundException e) {
            e.printStackTrace();
            return null;
        }
    }

    private static String hexdigest(byte[] paramArrayOfByte) {
        final char[] hexDigits = { 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 97, 98, 99, 100, 101, 102 };
        try {
            MessageDigest localMessageDigest = MessageDigest.getInstance("MD5");
            localMessageDigest.update(paramArrayOfByte);
            byte[] arrayOfByte = localMessageDigest.digest();
            char[] arrayOfChar = new char[32];
            for (int i = 0, j = 0;; i++, j++) {
                if (i >= 16) {
                    return new String(arrayOfChar);
                }
                int k = arrayOfByte[i];
                arrayOfChar[j] = hexDigits[(0xF & k >>> 4)];
                arrayOfChar[++j] = hexDigits[(k & 0xF)];
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }
}