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-rw-r--r--nfc/java/android/nfc/cardemulation/CardEmulation.java5
1 files changed, 4 insertions, 1 deletions
diff --git a/nfc/java/android/nfc/cardemulation/CardEmulation.java b/nfc/java/android/nfc/cardemulation/CardEmulation.java
index e0bc15fe6e94..baae05b4ea03 100644
--- a/nfc/java/android/nfc/cardemulation/CardEmulation.java
+++ b/nfc/java/android/nfc/cardemulation/CardEmulation.java
@@ -1327,7 +1327,10 @@ public final class CardEmulation {
/**
* This method is called when an AID conflict is detected during an NFC transaction. This
- * can happen when multiple services are registered for the same AID.
+ * can happen when multiple services are registered for the same AID. If your service is
+ * registered for this AID you may want to instruct users to bring your app to the
+ * foreground and ensure you call {@link #setPreferredService(Activity, ComponentName)}
+ * to ensure the transaction is routed to your service.
*
* @param aid The AID that is in conflict
*/