Android: check if objectClass() is not null in registerNativeMethods()

In case the class doens't have a default constructor, checking for
object.isValid() will give false because the object won't be created,
however, the class could still be loaded and we could have a valid
jclass.

Fixes: QTBUG-96069
Change-Id: I8d59e26d9d7c0e8e363ce443937091a374a24473
Reviewed-by: Ivan Solovev <ivan.solovev@qt.io>
(cherry picked from commit dfb4b7856a82a72934211d9a1a44626777570d30)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/src/corelib/kernel/qjnienvironment.cpp b/src/corelib/kernel/qjnienvironment.cpp
index a72078d2cf..9766ff4d3b 100644
--- a/src/corelib/kernel/qjnienvironment.cpp
+++ b/src/corelib/kernel/qjnienvironment.cpp
@@ -347,11 +347,12 @@ JavaVM *QJniEnvironment::javaVM()
 bool QJniEnvironment::registerNativeMethods(const char *className, const JNINativeMethod methods[],
                                             int size)
 {
-    QJniObject classObject(className);
+    const jclass clazz = findClass(className);
 
-    if (!classObject.isValid())
+    if (!clazz)
         return false;
-    return registerNativeMethods(classObject.objectClass(), methods, size);
+
+    return registerNativeMethods(clazz, methods, size);
 }
 #if QT_DEPRECATED_SINCE(6, 2)
 /*!