Exploring the approach to draw an oversized barcode and let it be scaled down. Also increasing the minimum value for the width seeker.

Author: perepujal

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

@@ -86,12 +86,9 @@ public class BarcodeImageWriterTask implements CompatCallable<Bitmap> {
 
         if (format.isSquare()) {
             imageHeight = imageWidth = Math.min(imageViewHeight, Math.min(MAX_WIDTH, imageViewWidth));
-        } else if (imageView.getWidth() < MAX_WIDTH) {
-            imageHeight = imageViewHeight;
-            imageWidth = imageViewWidth;
         } else {
             // Scale down the image to reduce the memory needed to produce it
-            imageWidth = MAX_WIDTH;
+            imageWidth = Math.min(MAX_WIDTH, this.mContext.getResources().getDisplayMetrics().widthPixels);
             double ratio = (double) MAX_WIDTH / (double) imageViewWidth;
             imageHeight = (int) (imageViewHeight * ratio);
         }

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

@@ -52,6 +52,7 @@
 import com.google.android.material.color.MaterialColors;
 import com.google.android.material.dialog.MaterialAlertDialogBuilder;
 import com.google.android.material.textfield.TextInputEditText;
+import com.google.zxing.BarcodeFormat;
 
 import java.io.File;
 import java.io.UnsupportedEncodingException;
@@ -1150,7 +1151,8 @@ private void setFullscreen(boolean enabled) {
             binding.fullscreenLayout.setVisibility(View.VISIBLE);
 
             // Only show width slider if the barcode isn't square (square barcodes will resize height and width together)
-            binding.setWidthLayout.setVisibility(format.isSquare() ? View.GONE : View.VISIBLE);
+            // or if the internals of the barcode are squares, like DATA_MATRIX
+            binding.setWidthLayout.setVisibility((format.isSquare() || format.format() == BarcodeFormat.DATA_MATRIX) ? View.GONE : View.VISIBLE);
 
             drawMainImage(mainImageIndex, true, isFullscreen);
 

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

@@ -234,7 +234,7 @@
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"
                 android:contentDescription="@string/setBarcodeWidth"
-                android:min="10"
+                android:min="20"
                 android:max="100" />
         </LinearLayout>