Copy Value button in the dialog box

Author: Sentinel-Android

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

@@ -708,7 +708,13 @@ protected void onResume() {
             AlertDialog.Builder builder = new MaterialAlertDialogBuilder(LoyaltyCardViewActivity.this);
             builder.setTitle(R.string.cardId);
             builder.setView(cardIdView);
-            builder.setPositiveButton(R.string.ok, (dialogInterface, i) -> dialogInterface.dismiss());
+            builder.setPositiveButton(R.string.copy_value, (dialog, which) -> {
+                ClipboardManager cm = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+                cm.setPrimaryClip(ClipData.newPlainText("QR value", loyaltyCard.cardId));
+                // Optional app toast; comment out if you rely on Android's privacy toast only
+                Toast.makeText(this, R.string.copied_to_clipboard, Toast.LENGTH_SHORT).show();
+            });
+            builder.setNegativeButton(android.R.string.ok, (dialog, which) -> dialog.dismiss());
             AlertDialog dialog = builder.create();
             dialog.show();
         });