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

   1 package de.dhbwloe.campusapp;
   2
   3 import android.view.View;
   4 import android.view.ViewGroup;
   5 import android.widget.AdapterView;
   6
   7 import java.security.MessageDigest;
   8 import java.security.NoSuchAlgorithmException;
   9 import java.util.Calendar;
  10 import java.util.Date;
  11
  12 import javax.crypto.Cipher;
  13 import javax.crypto.spec.SecretKeySpec;
  14
  15 /**
  16  * Created by pk910 on 25.01.2016.
  17  */
  18 public class Tools {
  19
  20     public static final String md5(final String s) {
  21         final String MD5 = "MD5";
  22         try {
  23             // Create MD5 Hash
  24             MessageDigest digest = java.security.MessageDigest.getInstance(MD5);
  25             digest.update(s.getBytes());
  26             byte messageDigest[] = digest.digest();
  27
  28             // Create Hex String
  29             StringBuilder hexString = new StringBuilder();
  30             for (byte aMessageDigest : messageDigest) {
  31                 String h = Integer.toHexString(0xFF & aMessageDigest);
  32                 while (h.length() < 2)
  33                     h = "0" + h;
  34                 hexString.append(h);
  35             }
  36             return hexString.toString();
  37
  38         } catch (NoSuchAlgorithmException e) {
  39             e.printStackTrace();
  40         }
  41         return "";
  42     }
  43
  44     public static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
  45         SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
  46         Cipher cipher = Cipher.getInstance("AES");
  47         cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
  48         byte[] encrypted = cipher.doFinal(clear);
  49         return encrypted;
  50     }
  51
  52     public static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
  53         SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
  54         Cipher cipher = Cipher.getInstance("AES");
  55         cipher.init(Cipher.DECRYPT_MODE, skeySpec);
  56         byte[] decrypted = cipher.doFinal(encrypted);
  57         return decrypted;
  58     }
  59
  60     public static void removeAllChildViews(ViewGroup viewGroup) {
  61         for (int i = 0; i < viewGroup.getChildCount(); i++) {
  62             View child = viewGroup.getChildAt(i);
  63             if (child instanceof ViewGroup) {
  64                 if (child instanceof AdapterView) {
  65                     viewGroup.removeView(child);
  66                     return;
  67                 }
  68                 removeAllChildViews(((ViewGroup) child));
  69             } else {
  70                 viewGroup.removeView(child);
  71             }
  72         }
  73     }
  74
  75     public static String getWeekdayString(long date) {
  76         return getWeekdayString(date, true);
  77     }
  78
  79     public static String getWeekdayString(long date, boolean fullString) {
  80         return getWeekdayString(new Date(date * 1000), fullString);
  81     }
  82
  83     public static String getWeekdayString(Date date) {
  84         return getWeekdayString(date, true);
  85     }
  86
  87     public static String getWeekdayString(Date date, boolean fullString) {
  88         int weekdayResIds[];
  89         if(fullString)
  90             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 };
  91         else
  92             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 };
  93         Calendar cal = Calendar.getInstance();
  94         cal.setTime(date);
  95         int dow = cal.get(Calendar.DAY_OF_WEEK);
  96         int weekdayResId = weekdayResIds[dow-1];
  97         return CampusAppContext.getInstance().getResString(weekdayResId);
  98     }
  99
 100 }