fix: fix back button over item, print item names on two lines and update default item list

app/build.gradle

@@ -10,8 +10,8 @@ android {
         applicationId "com.stock.pignon"
         minSdkVersion 17
         targetSdkVersion 36
-        versionCode 4
-        versionName "0.4.0"
+        versionCode 7
+        versionName "0.5.2"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

app/src/main/assets/pieces.json

@@ -8,10 +8,11 @@
       "bgColor": "#FF0000",
       "textColor": "#000000",
       "items": [
+        {"name": "Vélo", "minPrice": 20, "maxPrice": 40, "image": "velo"},
         {"name": "Cadre", "minPrice": 20, "maxPrice": 40, "image": "cadre"},
         {"name": "Selle", "minPrice": 1, "maxPrice": 7, "image": "selle"},
-        {"name": "Tige de selle", "minPrice": 1, "maxPrice": 10, "image": "tigeselle"},
-        {"name": "Collier de selle", "minPrice": 1, "maxPrice": 4, "image": "collierselle"}
+        {"name": "Tige de selle", "minPrice": 1, "maxPrice": 10, "image": "tige_selle"},
+        {"name": "Collier de selle", "minPrice": 1, "maxPrice": 4, "image": "collier_selle"}
       ]
     },
     {
@@ -20,10 +21,14 @@
       "textColor": "#000000",
       "items": [
         {"name": "Fourche", "minPrice": 10, "maxPrice": 20, "image": "fourche"},
-        {"name": "Jeu de direction", "minPrice": 1, "maxPrice": 8, "image": "jeudirection"},
-        {"name": "Potence headset", "minPrice": 2, "maxPrice": 8, "image": "potenceheadset"},
-        {"name": "Potence plongeur", "minPrice": 2, "maxPrice": 8, "image": "potenceplongeur"},
-        {"name": "Tige plongeur", "minPrice": 1, "maxPrice": 4, "image": "tigeplongeur"}
+        {"name": "Fourche suspendue", "minPrice": 10, "maxPrice": 20, "image": "fourche_suspendue"},
+        {"name": "Roulement direction", "minPrice": 1, "maxPrice": 8, "image": "roulement_direction"},
+        {"name": "Jeu de direction", "minPrice": 1, "maxPrice": 8, "image": "jeu_direction"},
+        {"name": "Potence headset", "minPrice": 2, "maxPrice": 8, "image": "potence_headset"},
+        {"name": "Potence headset réglable", "minPrice": 2, "maxPrice": 8, "image": "potence_headset_reglable"},
+        {"name": "Potence plongeur", "minPrice": 2, "maxPrice": 8, "image": "potence_plongeur"},
+        {"name": "Potence plongeur réglable", "minPrice": 2, "maxPrice": 8, "image": "potence_plongeur_reglable"},
+        {"name": "Tige plongeur", "minPrice": 1, "maxPrice": 4, "image": "tige_plongeur"}
       ]
     },
     {
@@ -31,13 +36,14 @@
       "bgColor": "#F16000",
       "textColor": "#000000",
       "items": [
-        {"name": "Poignée combo", "minPrice": 2, "maxPrice": 8, "image": "poigneecombo"},
-        {"name": "Poignée frein", "minPrice": 2, "maxPrice": 8, "image": "poigneefrein"},
-        {"name": "Poignée gachette", "minPrice": 2, "maxPrice": 8, "image": "poigneegachette"},
-        {"name": "Poignée tournante", "minPrice": 2, "maxPrice": 6, "image": "poigneetournante"},
+        {"name": "Poignée combo", "minPrice": 2, "maxPrice": 8, "image": "poignee_combo"},
+        {"name": "Poignée frein", "minPrice": 2, "maxPrice": 8, "image": "poignee_frein"},
+        {"name": "Poignée gachette", "minPrice": 2, "maxPrice": 8, "image": "poignee_gachette"},
+        {"name": "Poignée tournante", "minPrice": 2, "maxPrice": 6, "image": "poignee_tournante"},
+        {"name": "Manette cadre", "minPrice": 2, "maxPrice": 6, "image": "manette_cadre"},
         {"name": "Gaine", "minPrice": 0, "maxPrice": 2, "image": "gaine"},
         {"name": "Câble", "minPrice": 0, "maxPrice": 1, "image": "cable"},
-        {"name": "Poignée", "minPrice": 1, "maxPrice": 4, "image": "poignees"},
+        {"name": "Poignée", "minPrice": 1, "maxPrice": 4, "image": "poignee"},
         {"name": "Cintre", "minPrice": 5, "maxPrice": 10,"image": "cintre"}
       ]
     },
@@ -46,11 +52,15 @@
       "bgColor": "#FF00FF",
       "textColor": "#000000",
       "items": [
-        {"name": "Étrier patin", "minPrice": 2, "maxPrice": 8, "image": "etrierpatin"},
-        {"name": "Étrier disque", "minPrice": 2, "maxPrice": 8, "image": "etrierdisque"},
+        {"name": "Étrier V-brake", "minPrice": 2, "maxPrice": 8, "image": "etrier_vbrake"},
+        {"name": "Étrier Cantilever", "minPrice": 2, "maxPrice": 8, "image": "etrier_cantilever"},
+        {"name": "Étrier Caliper ou Mafac", "minPrice": 2, "maxPrice": 8, "image": "etrier_mafac_caliper"},
+        {"name": "Étrier disque câble", "minPrice": 2, "maxPrice": 8, "image": "etrier_cable"},
+        {"name": "Étrier disque hydraulique", "minPrice": 2, "maxPrice": 8, "image": "etrier_hydraulique"},
         {"name": "Patins", "minPrice": 1, "maxPrice": 2, "image": "patins"},
         {"name": "Disque", "minPrice": 1, "maxPrice": 5, "image": "disque"},
-        {"name": "Visserie frein", "minPrice": 0, "maxPrice": 1, "image": "visseriefrein"}
+        {"name": "Pont central cantilever", "minPrice": 0, "maxPrice": 1, "image": "frein_pontcentral"},
+        {"name": "Visserie frein", "minPrice": 0, "maxPrice": 1, "image": "visserie_frein"}
       ]
     },
     {
@@ -58,15 +68,23 @@
       "bgColor": "#0000FF",
       "textColor": "#FFFFFF",
       "items": [
-        {"name": "Roue avant", "minPrice": 20, "maxPrice": 40, "image": "roueavant"},
-        {"name": "Roue arrière", "minPrice": 20, "maxPrice": 40, "image": "rouearriere"},
-        {"name": "Axe rapide", "minPrice": 1, "maxPrice": 2, "image": "axerapide"},
-        {"name": "Axe roue", "minPrice": 1, "maxPrice": 3, "image": "axeroue"},
+        {"name": "Chambre à air", "minPrice": 20, "maxPrice": 40, "image": "chambre_air"},
+        {"name": "Roue avant", "minPrice": 20, "maxPrice": 40, "image": "roue_avant"},
+        {"name": "Roue arrière", "minPrice": 20, "maxPrice": 40, "image": "roue_arriere"},
+        {"name": "Axe rapide", "minPrice": 1, "maxPrice": 2, "image": "axe_rapide"},
+        {"name": "Axe roue", "minPrice": 1, "maxPrice": 3, "image": "axe_roue"},
         {"name": "Rayon", "minPrice": 0, "maxPrice": 2, "image": "rayon"},
-        {"name": "Moyeu avant", "minPrice": 2, "maxPrice": 8, "image": "moyeuavant"},
-        {"name": "Moyeu arrière", "minPrice": 2, "maxPrice": 10, "image": "moyeuarriere"},
-        {"name": "Pneu", "minPrice": 10, "maxPrice": 20, "image": "pneu"},
-        {"name": "Visserie roue", "minPrice": 0, "maxPrice": 1, "image": "visserieroue"}
+        {"name": "Jante", "minPrice": 0, "maxPrice": 2, "image": "jante"},
+        {"name": "Fond de jante", "minPrice": 0, "maxPrice": 2, "image": "fond_jante"},
+        {"name": "Moyeu avant", "minPrice": 2, "maxPrice": 8, "image": "moyeu_avant"},
+        {"name": "Moyeu arrière cassette", "minPrice": 2, "maxPrice": 10, "image": "moyeu_arriere_cassette"},
+        {"name": "Moyeu arrière roue libre", "minPrice": 2, "maxPrice": 10, "image": "moyeu_arriere_rouelibre"},
+        {"name": "Moyeu arrière rétropédalage", "minPrice": 2, "maxPrice": 10, "image": "moyeu_retropedalage"},
+        {"name": "Pneu petite taille", "minPrice": 10, "maxPrice": 20, "image": "pneu_petit"},
+        {"name": "Pneu 26\"", "minPrice": 10, "maxPrice": 20, "image": "pneu_26"},
+        {"name": "Pneu 28\" route", "minPrice": 10, "maxPrice": 20, "image": "pneu_route"},
+        {"name": "Pneu 28\" large", "minPrice": 10, "maxPrice": 20, "image": "pneu_large"},
+        {"name": "Visserie roue", "minPrice": 0, "maxPrice": 1, "image": "visserie_roue"}
       ]
     },
     {
@@ -74,12 +92,13 @@
       "bgColor": "#FFCC00",
       "textColor": "#000000",
       "items": [
-        {"name": "Dérailleur avant", "minPrice": 2, "maxPrice": 10, "image": "fd"},
-        {"name": "Dérailleur arrière", "minPrice": 4, "maxPrice": 12, "image": "rd"},
+        {"name": "Dérailleur arrière", "minPrice": 2, "maxPrice": 10, "image": "derailleur_arriere"},
+        {"name": "Dérailleur avant tirage bas", "minPrice": 4, "maxPrice": 12, "image": "derailleur_avant_tiragebas"},
+        {"name": "Dérailleur avant tirage haut", "minPrice": 4, "maxPrice": 12, "image": "derailleur_avant_tiragebas"},
         {"name": "Cassette", "minPrice": 2, "maxPrice": 6, "image": "cassette"},
-        {"name": "Roue libre", "minPrice": 2, "maxPrice": 6, "image": "rouelibre"},
+        {"name": "Roue libre", "minPrice": 2, "maxPrice": 6, "image": "roue_libre"},
         {"name": "Chaîne", "minPrice": 2, "maxPrice": 6, "image": "chaine"},
-        {"name": "Visserie transmission", "minPrice": 0, "maxPrice": 1, "image": "visserietransmission"}
+        {"name": "Visserie transmission", "minPrice": 0, "maxPrice": 1, "image": "visserie_transmission"}
       ]
     },
     {
@@ -87,13 +106,17 @@
       "bgColor": "#00FFFF",
       "textColor": "#000000",
       "items": [
-        {"name": "Boîtier pédalier", "minPrice": 4, "maxPrice": 12, "image": "boitierpedalier"},
-        {"name": "Manivelle gauche", "minPrice": 4, "maxPrice": 12, "image": "manivellegauche"},
-        {"name": "Manivelle droite", "minPrice": 4, "maxPrice": 12, "image": "manivelledroite"},
-        {"name": "Pédalier complet", "minPrice": 6, "maxPrice": 15, "image": "pedaliercomplet"},
+        {"name": "Axe pédalier carré ou clavette", "minPrice": 4, "maxPrice": 12, "image": "axe_pedalier"},
+        {"name": "Roulement pédalier", "minPrice": 4, "maxPrice": 12, "image": "roulement_pedalier"},
+        {"name": "Boîtier pédalier cartouche", "minPrice": 4, "maxPrice": 12, "image": "boitier_cartouche"},
+        {"name": "Boîtier pédalier Hollowtech 2", "minPrice": 4, "maxPrice": 12, "image": "boitier_hollowtech"},
+        {"name": "Manivelle gauche", "minPrice": 4, "maxPrice": 12, "image": "manivelle_gauche"},
+        {"name": "Manivelle droite", "minPrice": 4, "maxPrice": 12, "image": "manivelle_droite"},
+        {"name": "Pédalier complet", "minPrice": 6, "maxPrice": 15, "image": "pedalier_complet"},
         {"name": "Pédales", "minPrice": 2, "maxPrice": 8, "image": "pedales"},
-        {"name": "Plateau", "minPrice": 2, "maxPrice": 8, "image": "plateau"},
-        {"name": "Visserie pédalier", "minPrice": 0, "maxPrice": 1, "image": "visseriepedalier"}
+        {"name": "Plateau 4 branches", "minPrice": 2, "maxPrice": 8, "image": "plateau_4"},
+        {"name": "Plateau 5 branches", "minPrice": 2, "maxPrice": 8, "image": "plateau_5"},
+        {"name": "Visserie pédalier", "minPrice": 0, "maxPrice": 1, "image": "visserie_pedalier"}
       ]
     },
     {
@@ -102,10 +125,13 @@
       "textColor": "#000000",
       "items": [
         {"name": "Béquille", "minPrice": 2, "maxPrice": 8, "image": "bequille"},
-        {"name": "Garde boue", "minPrice": 2, "maxPrice": 8, "image": "gardeboue"},
+        {"name": "Garde boue", "minPrice": 2, "maxPrice": 8, "image": "garde_boue"},
         {"name": "Lampe", "minPrice": 1, "maxPrice": 5, "image": "lampe"},
-        {"name": "Porte bagage", "minPrice": 2, "maxPrice": 10, "image": "portebagage"},
-        {"name": "Porte bidon", "minPrice": 0, "maxPrice": 1, "image": "portebidon"}
+        {"name": "Porte bagage", "minPrice": 2, "maxPrice": 10, "image": "porte_bagage"},
+        {"name": "Porte bidon", "minPrice": 0, "maxPrice": 1, "image": "porte_bidon"},
+        {"name": "Pompe", "minPrice": 0, "maxPrice": 1, "image": "pompe"},
+        {"name": "Panier", "minPrice": 0, "maxPrice": 1, "image": "panier"},
+        {"name": "Rétroviseur", "minPrice": 0, "maxPrice": 1, "image": "retroviseur"}
       ]
     }
   ]

app/src/main/java/com/stock/pignon/CartActionHelper.java

@@ -3,7 +3,6 @@ package com.stock.pignon;
 
 import android.app.AlertDialog;
 import android.content.Context;
-import android.content.Intent;
 import android.os.Handler;
 import android.os.Environment;
 import android.text.Html;
@@ -111,8 +110,8 @@ public class CartActionHelper {
      */
     private static void saveCartToExternalFile(List<CartItem> cartItems) {
         File dir = new File(Environment.getExternalStorageDirectory(), Config.EXTERNAL_DIR_NAME);
-        File stockFile = new File(dir, Config.OUPUT_JSON_NAME);
-        File csvFile = new File(dir, Config.OUPUT_CSV_NAME);
+        File stockFile = new File(dir, Config.OUTPUT_JSON_NAME);
+        File csvFile = new File(dir, Config.OUTPUT_CSV_NAME);
 
         String today = DateHelper.getTodayIso();
         Gson gson = new Gson();

app/src/main/java/com/stock/pignon/CartViewHelper.java

@@ -22,17 +22,16 @@ import java.util.List;
 public class CartViewHelper {
 
     /**
-     * Refreshes the entire cart side-panel or list
-     * Clears everything and rebuild on current CartManager data
+     * Refreshes cart UI by synchronizing the visual list with the current CartManager state
      */
     public static void updateCartView(LinearLayout cartList, Context context) {
         if (cartList == null) return;
 
-        // Clear and get current items
+        // Clean item lists
         cartList.removeAllViews();
         List<CartItem> cartItems = CartManager.getItems();
 
-        // If empty cart, show it to user
+        // Manage empty cart
         if (cartItems.isEmpty()) {
             TextView empty = new TextView(context);
             empty.setText(context.getString(R.string.cart_empty));
@@ -40,36 +39,20 @@ public class CartViewHelper {
             empty.setGravity(Gravity.CENTER);
             empty.setPadding(0, 50, 0, 0);
             cartList.addView(empty);
-
             updateTotalDisplay(context, 0, 0);
-            return;
-        }
-
-        // Build list and calculate total at the same time
+        } else {
+            // Create list if not empty
             int totalMin = 0;
             int totalMax = 0;
-
             for (CartItem item : cartItems) {
                 totalMin += item.getTotalMin();
                 totalMax += item.getTotalMax();
 
-            // Create and add the row view
+                // Create a line for each item
                 cartList.addView(createCartItemView(item, cartList, context));
             }
-
-        // Display global price range at the end
             updateTotalDisplay(context, totalMin, totalMax);
         }
-
-    /**
-     * Updates the global price range at the bottom of the screen
-     */
-    private static void updateTotalDisplay(Context context, int min, int max) {
-        TextView totalView = ((Activity) context).findViewById(R.id.totalView);
-        if (totalView != null) {
-            // Using string resources
-            totalView.setText(context.getString(R.string.price_range, min, max, "€"));
-        }
     }
 
     /**
@@ -81,7 +64,6 @@ public class CartViewHelper {
         row.setOrientation(LinearLayout.HORIZONTAL);
         row.setGravity(Gravity.CENTER_VERTICAL);
 
-        // Layout parameters
         LinearLayout.LayoutParams rowParams = new LinearLayout.LayoutParams(
                 LinearLayout.LayoutParams.MATCH_PARENT,
                 LinearLayout.LayoutParams.WRAP_CONTENT);
@@ -96,7 +78,7 @@ public class CartViewHelper {
         image.setLayoutParams(imgParams);
         row.addView(image);
 
-        // Sublayout for name + [quantity + price]
+        // Sublayout infos
         LinearLayout infoLayout = new LinearLayout(context);
         infoLayout.setOrientation(LinearLayout.VERTICAL);
         infoLayout.setLayoutParams(new LinearLayout.LayoutParams(0, LinearLayout.LayoutParams.WRAP_CONTENT, 1f));
@@ -108,7 +90,7 @@ public class CartViewHelper {
         nameView.setTypeface(null, Typeface.BOLD);
         infoLayout.addView(nameView);
 
-        // Quantity and price range
+        // Quantity / price
         TextView detailsView = new TextView(context);
         String details = context.getString(R.string.cart_item, item.getQuantity(), item.getTotalMin(), item.getTotalMax());
         detailsView.setText(details);
@@ -124,42 +106,35 @@ public class CartViewHelper {
     }
 
     /**
-     * Creates the delete button
+     * Creates the delete button for each item
     */
     private static Button createRemoveButton(CartItem item, LinearLayout cartList, Context context) {
         Button btn = new Button(context);
         btn.setText("✖");
-        btn.setTextSize(18);
         btn.setTextColor(Color.WHITE);
-        btn.setGravity(Gravity.CENTER);
-
-        // Conversion DP to PX for consistent size on all screens
         float scale = context.getResources().getDisplayMetrics().density;
         int sizePx = (int) (48 * scale + 0.5f);
+        btn.setLayoutParams(new LinearLayout.LayoutParams(sizePx, sizePx));
 
-        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(sizePx, sizePx);
-        btn.setLayoutParams(params);
-
-        // Background: grey rounded rectangle (API 17 fallback)
         GradientDrawable shape = new GradientDrawable();
-        shape.setColor(Color.parseColor("#E53935")); // Reddish to indicate delete
+        shape.setColor(Color.parseColor("#E53935"));
         shape.setCornerRadius(4 * scale);
         btn.setBackground(shape);
 
         btn.setOnClickListener(v -> {
-            // setting quantity to 0 removes the item
-            CartManager.addOrUpdateItem(
-                    item.getName(),
-                    item.getMinPrice(),
-                    item.getMaxPrice(),
-                    0, // Setting quantity to 0 triggers removal
-                    item.getImageFile()
-            );
-
-            // visual refresh of the cart list
+            CartManager.addOrUpdateItem(item.getName(), item.getMinPrice(), item.getMaxPrice(), 0, item.getImageFile());
             updateCartView(cartList, context);
         });
-
         return btn;
     }
+
+    /**
+     * Manage price range for whole cart
+     */
+    private static void updateTotalDisplay(Context context, int min, int max) {
+        TextView totalView = ((Activity) context).findViewById(R.id.totalView);
+        if (totalView != null) {
+            totalView.setText(context.getString(R.string.price_range, min, max, "€"));
+        }
+    }
 }

app/src/main/java/com/stock/pignon/Config.java

@@ -12,8 +12,8 @@ public class Config {
     public static final String INPUT_JSON_NAME = "pieces.json";
 
     // Output json
-    public static final String OUPUT_JSON_NAME = "stock.json";
+    public static final String OUTPUT_JSON_NAME = "stock.json";
 
     // Output json
-    public static final String OUPUT_CSV_NAME = "stock.csv";
+    public static final String OUTPUT_CSV_NAME = "stock.csv";
 }

app/src/main/java/com/stock/pignon/ControlServer.java

@@ -42,16 +42,16 @@ public class ControlServer extends NanoHTTPD {
                 return downloadFile(Config.INPUT_JSON_NAME);
 
             case "/output_json":
-                return viewFile(Config.OUPUT_JSON_NAME);
+                return viewFile(Config.OUTPUT_JSON_NAME);
 
             case "/download_output_json":
-                return downloadFile(Config.OUPUT_JSON_NAME);
+                return downloadFile(Config.OUTPUT_JSON_NAME);
 
             case "/output_csv":
-                return viewFile(Config.OUPUT_CSV_NAME);
+                return viewFile(Config.OUTPUT_CSV_NAME);
 
             case "/download_output_csv":
-                return downloadFile(Config.OUPUT_CSV_NAME);
+                return downloadFile(Config.OUTPUT_CSV_NAME);
 
             case "/":
             case "/index.html":

app/src/main/java/com/stock/pignon/MainActivity.java

@@ -12,6 +12,7 @@ import android.widget.Button;
 import android.widget.GridLayout;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
+import android.widget.FrameLayout;
 import android.widget.TextView;
 import android.os.Environment;
 import java.io.File;
@@ -35,7 +36,7 @@ public class MainActivity extends AppCompatActivity {
     // UI components
     private LinearLayout cartList;
     private LinearLayout homeLayout;
-    private LinearLayout categoryItemsLayout;
+    private FrameLayout categoryItemsLayout;
     private LinearLayout categoriesLayout;
     private GridLayout gridPieces;
     private ImageView mainImage;
@@ -61,12 +62,6 @@ public class MainActivity extends AppCompatActivity {
         gridPieces = findViewById(R.id.gridPieces);
         mainImage = findViewById(R.id.mainImage);
 
-        // Setup Back Button
-        Button backBtn = findViewById(R.id.backToHomeBtn);
-        if (backBtn != null) {
-            backBtn.setOnClickListener(v -> showHome());
-        }
-
         // Copy assets to sd card if not founded
         copyAssetsIfEmpty();
         // Get data from sd card
@@ -86,7 +81,7 @@ public class MainActivity extends AppCompatActivity {
         }
 
         // Get app version
-        String versionName = "";
+        String versionName;
         try {
             versionName = "App v" + getPackageManager().getPackageInfo(getPackageName(), 0).versionName;
         } catch (Exception e) {
@@ -99,7 +94,7 @@ public class MainActivity extends AppCompatActivity {
             server.start();
             String url = "http://" + getDeviceIP() + ":8080";
 
-            // On met l'URL directement dans le sous-titre de l'ActionBar
+            // Print URL in action bar for user
             if (getSupportActionBar() != null) {
                 getSupportActionBar().setSubtitle("Serveur en ligne : " + url + " - " + versionName);
             }
@@ -109,6 +104,24 @@ public class MainActivity extends AppCompatActivity {
                 getSupportActionBar().setSubtitle("Erreur serveur" + " - " + versionName);
             }
         }
+
+        // Back button (blue)
+        Button btnBack = findViewById(R.id.btnBackFromCategory);
+        if (btnBack != null) {
+            btnBack.setOnClickListener(v -> showHome());
+        }
+
+        // Empty button (red)
+        Button btnClear = findViewById(R.id.clearCartBtn);
+        if (btnClear != null) {
+            btnClear.setOnClickListener(v -> CartActionHelper.emptyCart(cartList, this));
+        }
+
+        // Validate button (green)
+        Button btnValidate = findViewById(R.id.validateCartBtn);
+        if (btnValidate != null) {
+            btnValidate.setOnClickListener(v -> CartActionHelper.validateCart(cartList, this));
+        }
     }
 
     @Override
@@ -276,14 +289,6 @@ public class MainActivity extends AppCompatActivity {
         ImageLoader.loadImage(mainImage, "_velo", 800,800);
     }
 
-    public void emptyCart(View view) {
-        CartActionHelper.emptyCart(cartList, this);
-    }
-
-    public void validateCart(View view) {
-        CartActionHelper.validateCart(cartList, this);
-    }
-
     private int dpToPx(int dp) {
         return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, getResources().getDisplayMetrics());
     }
@@ -309,8 +314,8 @@ public class MainActivity extends AppCompatActivity {
         }
 
         // Check stock.json and stock.csv output files to avoid control server error
-        checkOrCreateEmptyFile(new File(rootDir, Config.OUPUT_JSON_NAME), "[]");
-        checkOrCreateEmptyFile(new File(rootDir, Config.OUPUT_CSV_NAME), "");
+        checkOrCreateEmptyFile(new File(rootDir, Config.OUTPUT_JSON_NAME), "[]");
+        checkOrCreateEmptyFile(new File(rootDir, Config.OUTPUT_CSV_NAME), "");
 
         // Check images folder
         File imgDir = new File(rootDir, Config.IMAGES_SUBDIR_NAME);

app/src/main/res/layout/activity_main.xml

@@ -1,12 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--  activity_main.xml -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="horizontal"
-    android:background="#ffffff">
-
-    <FrameLayout
+    android:background="#ffffff"
+    android:baselineAligned="false"> <FrameLayout
     android:id="@+id/contentFrame"
     android:layout_width="0dp"
     android:layout_height="match_parent"
@@ -17,9 +18,9 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="horizontal"
-            android:paddingLeft="20dp">
-
-            <LinearLayout
+        android:paddingStart="20dp"
+        android:paddingEnd="20dp"
+        tools:ignore="RtlSymmetry"> <LinearLayout
         android:id="@+id/categoriesLayout"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
@@ -31,33 +32,49 @@
             android:layout_width="0dp"
             android:layout_height="match_parent"
             android:layout_weight="1"
-                android:scaleType="fitCenter" />
-        </LinearLayout>
+            android:scaleType="fitCenter"
+            android:contentDescription="@string/app_name" /> </LinearLayout>
 
-        <LinearLayout
+    <FrameLayout
         android:id="@+id/categoryItemsLayout"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-            android:orientation="vertical"
-            android:visibility="gone"
-            android:padding="10dp">
-
-            <Button
-                android:id="@+id/backToHomeBtn"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="← Retour" />
+        android:visibility="gone">
 
         <ScrollView
             android:layout_width="match_parent"
-                android:layout_height="match_parent">
+            android:layout_height="match_parent"
+            android:padding="10dp">
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
                 <GridLayout
                     android:id="@+id/gridPieces"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
                     android:columnCount="4" />
-            </ScrollView>
+
+                <View
+                    android:layout_width="match_parent"
+                    android:layout_height="100dp" />
             </LinearLayout>
+        </ScrollView>
+
+        <androidx.appcompat.widget.AppCompatButton
+            android:id="@+id/btnBackFromCategory"
+            android:layout_width="200dp"
+            android:layout_height="70dp"
+            android:layout_gravity="bottom|start"
+            android:layout_margin="20dp"
+            android:text="@string/cart_back_btn"
+            android:textSize="20sp"
+            android:textStyle="bold"
+            android:textColor="#FFFFFF"
+            app:backgroundTint="#1E88E5"
+            android:elevation="8dp"
+            tools:targetApi="l" />
+    </FrameLayout>
 </FrameLayout>
 
     <include layout="@layout/partial_cart" />

app/src/main/res/layout/item_piece.xml

@@ -19,13 +19,15 @@
 
     <TextView
         android:id="@+id/itemName"
-        android:layout_width="wrap_content"
+        android:layout_width="150dp"
         android:layout_height="wrap_content"
         tools:text="Item name"
         android:textSize="20sp"
         android:layout_marginTop="0dp"
-        android:lines="1"
-        android:ellipsize="end" />
+        android:minLines="2"
+        android:maxLines="2"
+        android:ellipsize="end"
+        android:gravity="center"/>
 
     <TextView
         android:id="@+id/itemPrice"

app/src/main/res/layout/partial_cart.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--  partial_panier.xml -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/cartContainer"
     android:layout_width="350dp"
     android:layout_height="match_parent"
@@ -56,29 +57,29 @@
             android:orientation="horizontal"
             android:weightSum="2">
 
-            <Button
+            <androidx.appcompat.widget.AppCompatButton
                 android:id="@+id/clearCartBtn"
                 android:layout_width="0dp"
                 android:layout_weight="1"
-                android:layout_height="60dp"
+                android:layout_height="70dp"
                 android:text="@string/cart_empty_btn"
                 android:textSize="18sp"
+                android:textStyle="bold"
                 android:textColor="#FFFFFF"
-                android:background="#E53935"
-                android:layout_marginEnd="5dp"
-                android:onClick="emptyCart"/>
+                app:backgroundTint="#E53935"
+                android:layout_marginEnd="5dp"/>
 
-            <Button
+            <androidx.appcompat.widget.AppCompatButton
                 android:id="@+id/validateCartBtn"
                 android:layout_width="0dp"
                 android:layout_weight="1"
-                android:layout_height="60dp"
+                android:layout_height="70dp"
                 android:text="@string/cart_validate_btn"
                 android:textSize="18sp"
+                android:textStyle="bold"
                 android:textColor="#FFFFFF"
-                android:background="#43A047"
-                android:layout_marginStart="5dp"
-                android:onClick="validateCart"/>
+                app:backgroundTint="#43A047"
+                android:layout_marginStart="5dp"/>
         </LinearLayout>
     </LinearLayout>
 </LinearLayout>

app/src/main/res/values/strings.xml

@@ -3,6 +3,7 @@
 
     <string name="cart_name">Mes sacoches</string>
     <string name="cart_validate_btn">Valider</string>
+    <string name="cart_back_btn">Retour</string>
     <string name="cart_empty_btn">Vider</string>
     <string name="cart_empty">C\'est vide !</string>
     <string name="cart_item">Quantité : %1$d (%2$d - %3$d €)</string>