UI

app/src/main/java/com/cst/im30/activity/ICCActivity.java

@@ -66,7 +66,7 @@ public class ICCActivity extends AppCompatActivity {
                         TextView textTitle = dialogView.findViewById(R.id.text_title_confirm);
 
                         textTitle.setText("Error");
-                        textMessage.setText("Invalid card.");
+                        textMessage.setText("Cannot read card / Invalid card.\nPlease try again.");
 
                         dialogBuilder.setPositiveButton("OK", (dialog, which) -> {
                             stopChecking = false;

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

@@ -28,6 +28,7 @@
         android:id="@+id/text_message_confirm"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_margin="16dp" />
+        android:layout_margin="16dp"
+        android:textAlignment="center" />
 
 </LinearLayout>