app/src/main/java/de/dhbwloe/campusapp/Tools.java

   1 /* Tools.java
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 package de.dhbwloe.campusapp;
  17
  18 import android.view.View;
  19 import android.view.ViewGroup;
  20 import android.widget.AdapterView;
  21
  22 import java.security.MessageDigest;
  23 import java.security.NoSuchAlgorithmException;
  24 import java.util.Calendar;
  25 import java.util.Date;
  26
  27 import javax.crypto.Cipher;
  28 import javax.crypto.spec.SecretKeySpec;
  29
  30 /**
  31  * Created by pk910 on 25.01.2016.
  32  */
  33 public class Tools {
  34
  35     public static final String md5(final String s) {
  36         final String MD5 = "MD5";
  37         try {
  38             // Create MD5 Hash
  39             MessageDigest digest = java.security.MessageDigest.getInstance(MD5);
  40             digest.update(s.getBytes());
  41             byte messageDigest[] = digest.digest();
  42
  43             // Create Hex String
  44             StringBuilder hexString = new StringBuilder();
  45             for (byte aMessageDigest : messageDigest) {
  46                 String h = Integer.toHexString(0xFF & aMessageDigest);
  47                 while (h.length() < 2)
  48                     h = "0" + h;
  49                 hexString.append(h);
  50             }
  51             return hexString.toString();
  52
  53         } catch (NoSuchAlgorithmException e) {
  54             e.printStackTrace();
  55         }
  56         return "";
  57     }
  58
  59     public static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
  60         SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
  61         Cipher cipher = Cipher.getInstance("AES");
  62         cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
  63         byte[] encrypted = cipher.doFinal(clear);
  64         return encrypted;
  65     }
  66
  67     public static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
  68         SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
  69         Cipher cipher = Cipher.getInstance("AES");
  70         cipher.init(Cipher.DECRYPT_MODE, skeySpec);
  71         byte[] decrypted = cipher.doFinal(encrypted);
  72         return decrypted;
  73     }
  74
  75     public static void removeAllChildViews(ViewGroup viewGroup) {
  76         for (int i = 0; i < viewGroup.getChildCount(); i++) {
  77             View child = viewGroup.getChildAt(i);
  78             if (child instanceof ViewGroup) {
  79                 if (child instanceof AdapterView) {
  80                     viewGroup.removeView(child);
  81                     return;
  82                 }
  83                 removeAllChildViews(((ViewGroup) child));
  84             } else {
  85                 viewGroup.removeView(child);
  86             }
  87         }
  88     }
  89
  90     public static String getWeekdayString(long date) {
  91         return getWeekdayString(date, true);
  92     }
  93
  94     public static String getWeekdayString(long date, boolean fullString) {
  95         return getWeekdayString(new Date(date * 1000), fullString);
  96     }
  97
  98     public static String getWeekdayString(Date date) {
  99         return getWeekdayString(date, true);
 100     }
 101
 102     public static String getWeekdayString(Date date, boolean fullString) {
 103         int weekdayResIds[];
 104         if(fullString)
 105             weekdayResIds = new int[] { R.string.week_sunday, R.string.week_monday, R.string.week_tuesday, R.string.week_wednesday, R.string.week_thursday, R.string.week_friday, R.string.week_saturday };
 106         else
 107             weekdayResIds = new int[] { R.string.week_sunday_short, R.string.week_monday_short, R.string.week_tuesday_short, R.string.week_wednesday_short, R.string.week_thursday_short, R.string.week_friday_short, R.string.week_saturday_short };
 108         Calendar cal = Calendar.getInstance();
 109         cal.setTime(date);
 110         int dow = cal.get(Calendar.DAY_OF_WEEK);
 111         int weekdayResId = weekdayResIds[dow-1];
 112         return CampusAppContext.getInstance().getResString(weekdayResId);
 113     }
 114
 115 }