for each save game a unique color as background (see issue #7)

CHANGELOG.md

@@ -1,11 +1,10 @@
 CHANGELOG
 =========
 
-### Version 13.4
+### Version 14
 
 - fix game levels
-- show unique string above every savegame
-- 
+- show a unique string above every savegame and give it a unique background color
 
 ### Version 13.2
 

CHANGELOG_de.md

@@ -1,6 +1,15 @@
 Changelog Deutsch
 =================
 
+### Version 14
+
+- Level-Games repariert
+- Eindeutige Zeichenfolge über jedem Spielstand und eine eindeutige Hintergrundfarbe hinzugefügt
+
+### Version 13.2
+
+- `distributionSha256Sum` zu den Build-Optionen hinzugefügt
+
 ### Version 13.1
 
 - Nicht benötigte INTERNET permission entfernt

app/build.gradle

@@ -7,8 +7,8 @@ android {
         applicationId "de.z11.roboyard"
         minSdkVersion 19
         targetSdkVersion 34
-        versionCode 47
-        versionName "13.2"
+        versionCode 48
+        versionName "14"
     }
     buildTypes {
         release {

app/src/main/java/roboyard/eclabs/MapObjects.java

@@ -97,20 +97,59 @@ public static String createStringFromList( ArrayList<GridElement> data, boolean
 
         String stringContent;
         if (shortString) {
-            stringContent = generateUniqueString(content.toString());
+            stringContent = generateUnique5LetterFromString(content.toString());
         }else{
             stringContent = content.toString();
         }
 
         return stringContent;
     }
 
+    /*
+     * set a color for the unique string depending on the value of the string,
+     * the color is generated from the hex value of the string
+     * - there are only generated light colors
+     *
+     * @param input The input string
+     * @return A light color in hexadecimal format
+     */
+    public static String generateHexColorFromString(String input) {
+        try {
+            // Create a SHA-256 message digest instance
+            MessageDigest digest = MessageDigest.getInstance("SHA-256");
+
+            // Get the hash bytes for the input string
+            byte[] hashBytes = digest.digest(input.getBytes());
+
+            // Convert the hash bytes to a 6-letter hexadecimal string
+            StringBuilder color = new StringBuilder("#");
+            for (int i = 0; i < 6; i++) {
+                // Convert each byte to a positive integer and take modulo 16 to get a hexadecimal digit
+                int index = Math.abs(hashBytes[i]) % 16;
+                // if it is the first, third or 5th digit, the color should be lighter
+                if (i % 2 == 0 && index <= 4) {
+                    index += 5;
+                }
+                // Map the index to a hexadecimal digit
+                char digit = (char) (index < 10 ? '0' + index : 'A' + index - 10);
+
+                // Append the digit to the color string
+                color.append(digit);
+            }
+            return color.toString();
+        } catch (NoSuchAlgorithmException e) {
+            // Handle NoSuchAlgorithmException if the specified algorithm is not available
+            e.printStackTrace();
+            return null; // or throw an exception
+        }
+    }
+
     /*
      * Generate a unique string from the input string
      * @param input The input string
      * @return A unique 5-letter string altering between vowels and consonants
      */
-    public static String generateUniqueString(String input) {
+    public static String generateUnique5LetterFromString(String input) {
         try {
             // Create a SHA-256 message digest instance
             MessageDigest digest = MessageDigest.getInstance("SHA-256");

app/src/main/java/roboyard/eclabs/SaveGameScreen.java

@@ -14,6 +14,7 @@ public class SaveGameScreen extends GameScreen {
     private int[] buttonPositionsX;
     private int[] buttonPositionsY;
     private String[] mapUniqueString;
+    private String[] mapUniqueColor;
     private int autosaveButtonX;
     private int autosaveButtonY;
     private int backButtonX;
@@ -70,15 +71,18 @@ public void init() {
 
         // load all saved maps to create a unique string from the mapElements
         mapUniqueString = new String[cols * rows];
+        mapUniqueColor = new String[cols * rows];
         for (int i = 0; i < cols * rows; i++) {
             String mapPath = getMapPath(i);
             SaveManager saver = new SaveManager(gameManager.getActivity());
             if(saver.getMapsStateSaved(mapPath, "mapsSaved.txt")) {
                 String saveData = FileReadWrite.readPrivateData(gameManager.getActivity(), mapPath);
                 gridElements = MapObjects.extractDataFromString(saveData);
                 mapUniqueString[i] = MapObjects.createStringFromList(gridElements, true);
+                mapUniqueColor[i] = MapObjects.generateHexColorFromString(mapUniqueString[i]);
             } else {
                 mapUniqueString[i] = "";
+                mapUniqueColor[i] = "#000000";
             }
         }
     }
@@ -145,10 +149,20 @@ public void draw(RenderManager renderManager) {
             if (i == 0) {
                 renderManager.drawText((int) (20 * ratioW), (int) ((42 + ts) * ratioH)-5, "Autosave");
             } else {
-                renderManager.setColor(Color.BLACK);
-                renderManager.drawText(buttonPositionsX[i], buttonPositionsY[i]-5, (i<10?" ":"") + i + ".");
-                renderManager.setColor(Color.parseColor("#222222"));
-                renderManager.drawText(buttonPositionsX[i]+33, buttonPositionsY[i]-5, mapUniqueString[i]);
+                renderManager.setColor(Color.parseColor(mapUniqueColor[i]));
+                int moveleft=16;
+
+                if (mapUniqueString[i].length() > 0){
+                    // unicode string with 11 filled squares
+                    String bar = "\u2588\u2588\u2588\u2588\u2588\u2588\u2588";
+                    for (int j = 0; j < 8; j++) {
+                        renderManager.drawText(buttonPositionsX[i] - moveleft, buttonPositionsY[i] - 5 + j * 15, bar);
+                    }
+
+                }
+
+                renderManager.setColor(Color.parseColor("#000000"));
+                renderManager.drawText(buttonPositionsX[i] - moveleft + 1 + (i<10? 8 : 0), buttonPositionsY[i] - 5, i + ". " + mapUniqueString[i]);
             }
         }