diff --git a/app/src/main/java/protect/card_locker/BarcodeImageWriterTask.java b/app/src/main/java/protect/card_locker/BarcodeImageWriterTask.java
new file mode 100644
index 000000000..cd32e0f35
--- /dev/null
+++ b/app/src/main/java/protect/card_locker/BarcodeImageWriterTask.java
@@ -0,0 +1,91 @@
+package protect.card_locker;
+
+import android.graphics.Bitmap;
+import android.os.AsyncTask;
+import android.util.Log;
+import android.widget.ImageView;
+
+import com.google.zxing.BarcodeFormat;
+import com.google.zxing.MultiFormatWriter;
+import com.google.zxing.WriterException;
+import com.google.zxing.common.BitMatrix;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * This task will generate a barcode and load it into an ImageView.
+ * Only a weak reference of the ImageView is kept, so this class will not
+ * prevent the ImageView from being garbage collected.
+ */
+class BarcodeImageWriterTask extends AsyncTask<Void, Void, Bitmap>
+{
+    private static final String TAG = "LoyaltyCardLocker";
+
+    private final WeakReference<ImageView> imageViewReference;
+    private final String cardId;
+    private final BarcodeFormat format;
+    private final int imageHeight;
+    private final int imageWidth;
+
+    public BarcodeImageWriterTask(ImageView imageView, String cardIdString,
+                                  BarcodeFormat barcodeFormat)
+    {
+        // Use a WeakReference to ensure the ImageView can be garbage collected
+        imageViewReference = new WeakReference<>(imageView);
+
+        cardId = cardIdString;
+        format = barcodeFormat;
+        imageHeight = imageView.getHeight();
+        imageWidth = imageView.getWidth();
+    }
+
+    public Bitmap doInBackground(Void... params)
+    {
+        MultiFormatWriter writer = new MultiFormatWriter();
+        BitMatrix bitMatrix;
+        try
+        {
+            bitMatrix = writer.encode(cardId, format, imageWidth, imageHeight, null);
+
+            final int WHITE = 0xFFFFFFFF;
+            final int BLACK = 0xFF000000;
+
+            int bitMatrixWidth = bitMatrix.getWidth();
+            int bitMatrixHeight = bitMatrix.getHeight();
+
+            int[] pixels = new int[bitMatrixWidth * bitMatrixHeight];
+
+            for (int y = 0; y < bitMatrixHeight; y++)
+            {
+                int offset = y * bitMatrixWidth;
+                for (int x = 0; x < bitMatrixWidth; x++)
+                {
+                    int color = bitMatrix.get(x, y) ? BLACK : WHITE;
+                    pixels[offset + x] = color;
+                }
+            }
+            Bitmap bitmap = Bitmap.createBitmap(bitMatrixWidth, bitMatrixHeight,
+                    Bitmap.Config.ARGB_8888);
+            bitmap.setPixels(pixels, 0, bitMatrixWidth, 0, 0, bitMatrixWidth, bitMatrixHeight);
+            return bitmap;
+        }
+        catch (WriterException | IllegalArgumentException e)
+        {
+            Log.e(TAG, "Failed to generate barcode", e);
+        }
+
+        return null;
+    }
+
+    protected void onPostExecute(Bitmap result)
+    {
+        ImageView imageView = imageViewReference.get();
+        if(imageView == null)
+        {
+            // The ImageView no longer exists, nothing to do
+            return;
+        }
+
+        imageView.setImageBitmap(result);
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/protect/card_locker/LoyaltyCardViewActivity.java b/app/src/main/java/protect/card_locker/LoyaltyCardViewActivity.java
index 015a76d7d..3cf30d3ae 100644
--- a/app/src/main/java/protect/card_locker/LoyaltyCardViewActivity.java
+++ b/app/src/main/java/protect/card_locker/LoyaltyCardViewActivity.java
@@ -2,7 +2,6 @@ package protect.card_locker;
 
 
 import android.content.Intent;
-import android.graphics.Bitmap;
 import android.os.Bundle;
 import android.support.design.widget.Snackbar;
 import android.support.v7.app.ActionBar;
@@ -17,9 +16,6 @@ import android.widget.EditText;
 import android.widget.ImageView;
 
 import com.google.zxing.BarcodeFormat;
-import com.google.zxing.MultiFormatWriter;
-import com.google.zxing.WriterException;
-import com.google.zxing.common.BitMatrix;
 import com.google.zxing.integration.android.IntentIntegrator;
 import com.google.zxing.integration.android.IntentResult;
 
@@ -149,52 +145,14 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
 
         if(cardIdField.getText().length() > 0 && barcodeTypeField.getText().length() > 0)
         {
-            MultiFormatWriter writer = new MultiFormatWriter();
-            BitMatrix result;
-            try
-            {
-                String formatString = barcodeTypeField.getText().toString();
-                BarcodeFormat format = BarcodeFormat.valueOf(formatString);
-                if(format == null)
-                {
-                    throw new IllegalArgumentException("Unrecognized barcode format: " + formatString);
-                }
+            String formatString = barcodeTypeField.getText().toString();
+            final BarcodeFormat format = BarcodeFormat.valueOf(formatString);
+            final String cardIdString = cardIdField.getText().toString();
 
-                int generateWidth = 100;
-                int generateHeight = 100;
+            new BarcodeImageWriterTask(barcodeImage, cardIdString, format).execute();
 
-                String cardIdString = cardIdField.getText().toString();
-
-                Log.i(TAG, "Card: " + cardIdString);
-
-                result = writer.encode(cardIdString, format, generateWidth, generateHeight, null);
-
-                final int WHITE = 0xFFFFFFFF;
-                final int BLACK = 0xFF000000;
-
-                int width = result.getWidth();
-                int height = result.getHeight();
-                int[] pixels = new int[width * height];
-                for (int y = 0; y < height; y++)
-                {
-                    int offset = y * width;
-                    for (int x = 0; x < width; x++)
-                    {
-                        pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;
-                    }
-                }
-                Bitmap bitmap = Bitmap.createBitmap(width, height,
-                        Bitmap.Config.ARGB_8888);
-                bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
-                barcodeImage.setImageBitmap(bitmap);
-
-                barcodeIdLayout.setVisibility(View.VISIBLE);
-                barcodeImageLayout.setVisibility(View.VISIBLE);
-            }
-            catch (WriterException | IllegalArgumentException e)
-            {
-                Log.e(TAG, "Failed to generate barcode", e);
-            }
+            barcodeIdLayout.setVisibility(View.VISIBLE);
+            barcodeImageLayout.setVisibility(View.VISIBLE);
         }
 
         View.OnClickListener captureCallback = new View.OnClickListener()
@@ -332,4 +290,4 @@ public class LoyaltyCardViewActivity extends AppCompatActivity
             }
         }
     }
-}
+}
\ No newline at end of file