Add tab to switch between multiple barcodes of same store

app/src/main/java/protect/card_locker/DBHelper.java

@@ -7,6 +7,9 @@ import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
 
+import java.util.ArrayList;
+import java.util.List;
+
 public class DBHelper extends SQLiteOpenHelper
 {
     public static final String DATABASE_NAME = "LoyaltyCards.db";
@@ -170,6 +173,34 @@ public class DBHelper extends SQLiteOpenHelper
         return res;
     }
 
+    /**
+     * Returns a list of all loyalty cards of the given store.
+     *
+     * @param store
+     * @return List<LoyaltyCard>
+     */
+    public List<LoyaltyCard> getLoyaltyCardsForStore(String store) {
+        List<LoyaltyCard> loyaltyCards = new ArrayList<>();
+
+        SQLiteDatabase db = getReadableDatabase();
+        String[] selectionArgs = { store };
+
+        Cursor res = db.rawQuery("select * from " + LoyaltyCardDbIds.TABLE +
+                " WHERE " + LoyaltyCardDbIds.STORE + "  IS ? " +
+                " ORDER BY " + LoyaltyCardDbIds.STORE + " COLLATE NOCASE ASC", selectionArgs, null);
+
+        try
+        {
+            while (res.moveToNext()) {
+                loyaltyCards.add(LoyaltyCard.toLoyaltyCard(res));
+            }
+        } finally {
+            res.close();
+        }
+
+        return loyaltyCards;
+    }
+
     public int getLoyaltyCardCount()
     {
         // An empty string will match everything

app/src/main/java/protect/card_locker/LoyaltyCardViewActivity.java

@@ -26,8 +26,11 @@ import android.widget.ImageView;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import com.google.android.material.tabs.TabLayout;
 import com.google.zxing.BarcodeFormat;
 
+import java.util.List;
+
 import protect.card_locker.preferences.Settings;
 
 
@@ -36,6 +39,8 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
     private static final String TAG = "CardLocker";
     private static final double LUMINANCE_MIDPOINT = 0.5;
 
+    TabLayout tabLayout;
+    TabLayout.OnTabSelectedListener onTabSelectedListener;
     TextView cardIdFieldView;
     TextView noteView;
     View noteViewDivider;
@@ -44,6 +49,7 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
     View collapsingToolbarLayout;
     int loyaltyCardId;
     LoyaltyCard loyaltyCard;
+    List<LoyaltyCard> storeCards;
     boolean rotationEnabled;
     DBHelper db;
     ImportURIHelper importURIHelper;
@@ -96,6 +102,20 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
         db = new DBHelper(this);
         importURIHelper = new ImportURIHelper(this);
 
+        tabLayout = findViewById(R.id.tabLayout);
+        onTabSelectedListener = new TabLayout.OnTabSelectedListener() {
+            @Override
+            public void onTabSelected(TabLayout.Tab tab) {
+                loyaltyCardId = storeCards.get(tab.getPosition()).id;
+                onResume();
+            }
+
+            @Override
+            public void onTabUnselected(TabLayout.Tab tab) {}
+
+            @Override
+            public void onTabReselected(TabLayout.Tab tab) {}
+        };
         cardIdFieldView = findViewById(R.id.cardIdView);
         noteView = findViewById(R.id.noteView);
         noteViewDivider = findViewById(R.id.noteViewDivider);
@@ -142,6 +162,32 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
             return;
         }
 
+        storeCards = db.getLoyaltyCardsForStore(loyaltyCard.store);
+        tabLayout.removeOnTabSelectedListener(onTabSelectedListener);
+        tabLayout.removeAllTabs();
+        for(int i = 0; i < storeCards.size(); i++)
+        {
+            LoyaltyCard storeCard = storeCards.get(i);
+
+            String loyaltyCardText = storeCard.note;
+            if(loyaltyCardText.isEmpty())
+            {
+                loyaltyCardText = String.valueOf(i + 1);
+            }
+
+            tabLayout.addTab(tabLayout.newTab().setText(loyaltyCardText));
+
+            if(storeCard.id == loyaltyCardId)
+            {
+                tabLayout.getTabAt(i).select();
+            }
+        }
+        tabLayout.addOnTabSelectedListener(onTabSelectedListener);
+        if(tabLayout.getTabCount() > 1)
+        {
+            tabLayout.setVisibility(View.VISIBLE);
+        }
+
         String formatString = loyaltyCard.barcodeType;
         final BarcodeFormat format = !formatString.isEmpty() ? BarcodeFormat.valueOf(formatString) : null;
         final String cardIdString = loyaltyCard.cardId;

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

@@ -27,6 +27,18 @@
                 android:orientation="horizontal"
                 app:layout_constraintGuide_percent="0.5"/>
 
+            <com.google.android.material.tabs.TabLayout
+                android:visibility="gone"
+                android:id="@+id/tabLayout"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                app:layout_constraintBottom_toTopOf="@+id/barcode"
+                app:layout_constraintEnd_toEndOf="parent"
+                app:layout_constraintStart_toStartOf="parent"
+                app:layout_constraintTop_toTopOf="parent"
+                app:tabGravity="fill"
+                app:tabMode="scrollable"/>
+
             <ImageView
                 android:id="@+id/barcode"
                 android:layout_width="0dp"
@@ -35,10 +47,10 @@
                 android:layout_marginBottom="10.0dip"
                 android:layout_marginStart="15.0dip"
                 android:layout_marginEnd="15.0dip"
+                app:layout_constraintTop_toBottomOf="@+id/tabLayout"
                 app:layout_constraintBottom_toTopOf="@+id/centerGuideline"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toStartOf="parent"
-                app:layout_constraintTop_toTopOf="parent"
                 android:contentDescription="@string/barcodeImageDescription"/>
 
             <TextView