From 45f361e97e9324734a6d99dd5d73b7c35c0176d3 Mon Sep 17 00:00:00 2001
From: Petri Virkkunen <petri.virkkunen@qt.io>
Date: Fri, 26 Jul 2024 14:50:37 +0300
Subject: [PATCH] Android: Warn user if backend register does not have
 requested interface
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Just in case, warn user if they are trying to use callInterface on an
interface that does not exist (probably has not been registered)

Change-Id: I1a4b2226cfecd139e36ab6386ea2fe868bd73f3f
Reviewed-by: Tinja Paavoseppä <tinja.paavoseppa@qt.io>
(cherry picked from commit 6643e97a89f06f0c32c3dff8b2c343eaa76c0e85)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/platforms/android/androidbackendregister.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/plugins/platforms/android/androidbackendregister.h b/src/plugins/platforms/android/androidbackendregister.h
index c186f7e107a..502880a77f3 100644
--- a/src/plugins/platforms/android/androidbackendregister.h
+++ b/src/plugins/platforms/android/androidbackendregister.h
@@ -43,8 +43,12 @@ public:
               ValidInterfaceType<Interface> = true>
     auto callInterface(const char *func, Args... args)
     {
-        if (const auto obj = getInterface<Interface>(); obj.isValid())
+        if (const auto obj = getInterface<Interface>(); obj.isValid()) {
             return obj.template callMethod<Ret, Args...>(func, std::forward<Args>(args)...);
+        } else {
+            qWarning() << "No interface with className"
+                       << QtJniTypes::Traits<Interface>::className() << "has been registered.";
+        }
 
         if constexpr (IsObjectType<Ret>::value)
             return Ret(QJniObject());