diff --git a/src/corelib/time/qtimezoneprivate_android.cpp b/src/corelib/time/qtimezoneprivate_android.cpp
index 9be5ea4a733..a82af07b582 100644
--- a/src/corelib/time/qtimezoneprivate_android.cpp
+++ b/src/corelib/time/qtimezoneprivate_android.cpp
@@ -95,10 +95,10 @@ static QJniObject getDisplayName(QJniObject zone, jint style, jboolean dst,
     QJniObject
         jvariant = QJniObject::fromString(QLocale::scriptToString(locale.script()));
     QJniObject jlocale("java.util.Locale",
-                              "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V",
-                              static_cast<jstring>(jlanguage.object()),
-                              static_cast<jstring>(jterritory.object()),
-                              static_cast<jstring>(jvariant.object()));
+                       "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V",
+                       jlanguage.object<jstring>(),
+                       jterritory.object<jstring>(),
+                       jvariant.object<jstring>());
 
     return zone.callObjectMethod("getDisplayName",
                                  "(ZILjava/util/Locale;)Ljava/lang/String;",
@@ -110,7 +110,7 @@ void QAndroidTimeZonePrivate::init(const QByteArray &ianaId)
     const QString iana = QString::fromUtf8(ianaId);
     androidTimeZone = QJniObject::callStaticObjectMethod(
         "java.util.TimeZone", "getTimeZone", "(Ljava/lang/String;)Ljava/util/TimeZone;",
-        static_cast<jstring>(QJniObject::fromString(iana).object()));
+        QJniObject::fromString(iana).object<jstring>());
 
     // The ID or display name of the zone we've got, if it looks like what we asked for:
     const auto match = [iana](const QJniObject &jname) -> QByteArray {
@@ -247,16 +247,16 @@ QList<QByteArray> QAndroidTimeZonePrivate::availableTimeZoneIds() const
     QJniObject androidAvailableIdList = QJniObject::callStaticObjectMethod("java.util.TimeZone", "getAvailableIDs", "()[Ljava/lang/String;");
 
     QJniEnvironment jniEnv;
-    int androidTZcount = jniEnv->GetArrayLength( static_cast<jarray>(androidAvailableIdList.object()) );
+    int androidTZcount = jniEnv->GetArrayLength(androidAvailableIdList.object<jarray>());
 
     // need separate jobject and QJniObject here so that we can delete (DeleteLocalRef) the reference to the jobject
     // (or else the JNI reference table fills after 512 entries from GetObjectArrayElement)
     jobject androidTZobject;
     QJniObject androidTZ;
-    for (int i=0; i<androidTZcount; i++ ) {
-        androidTZobject = jniEnv->GetObjectArrayElement( static_cast<jobjectArray>( androidAvailableIdList.object() ), i );
+    for (int i = 0; i < androidTZcount; i++) {
+        androidTZobject = jniEnv->GetObjectArrayElement(androidAvailableIdList.object<jobjectArray>(), i);
         androidTZ = androidTZobject;
-        availableTimeZoneIdList.append( androidTZ.toString().toUtf8() );
+        availableTimeZoneIdList.append(androidTZ.toString().toUtf8());
         jniEnv->DeleteLocalRef(androidTZobject);
     }
 
diff --git a/src/network/kernel/qnetworkproxy_android.cpp b/src/network/kernel/qnetworkproxy_android.cpp
index d0bdfa5c4d9..f218eb9caae 100644
--- a/src/network/kernel/qnetworkproxy_android.cpp
+++ b/src/network/kernel/qnetworkproxy_android.cpp
@@ -91,7 +91,7 @@ QList<QNetworkProxy> QNetworkProxyFactory::systemProxyForQuery(const QNetworkPro
                                                               "()[Ljava/lang/String;");
         bool exclude = false;
         if (exclusionList.isValid()) {
-            jobjectArray listObject = static_cast<jobjectArray>(exclusionList.object());
+            jobjectArray listObject = exclusionList.object<jobjectArray>();
             QJniEnvironment env;
             QJniObject entry;
             const int size = env->GetArrayLength(listObject);
diff --git a/src/plugins/platforms/android/androidcontentfileengine.cpp b/src/plugins/platforms/android/androidcontentfileengine.cpp
index 8ac950dbfea..2c47b71c88f 100644
--- a/src/plugins/platforms/android/androidcontentfileengine.cpp
+++ b/src/plugins/platforms/android/androidcontentfileengine.cpp
@@ -198,10 +198,10 @@ bool AndroidContentFileEngineIterator::hasNext() const
                                            QJniObject::fromString(path()).object());
             if (objArray.isValid()) {
                 QJniEnvironment env;
-                const jsize length = env->GetArrayLength(static_cast<jarray>(objArray.object()));
+                const jsize length = env->GetArrayLength(objArray.object<jarray>());
                 for (int i = 0; i != length; ++i) {
                     m_entries << QJniObject(env->GetObjectArrayElement(
-                                static_cast<jobjectArray>(objArray.object()), i)).toString();
+                                objArray.object<jobjectArray>(), i)).toString();
                 }
             }
         }
diff --git a/src/plugins/platforms/android/androidjniclipboard.cpp b/src/plugins/platforms/android/androidjniclipboard.cpp
index 597a56eb1ad..6178edd6754 100644
--- a/src/plugins/platforms/android/androidjniclipboard.cpp
+++ b/src/plugins/platforms/android/androidjniclipboard.cpp
@@ -114,7 +114,7 @@ namespace QtAndroidClipboard
             if (uris.isValid()) {
                 QList<QUrl> urls;
                 QJniEnvironment env;
-                jobjectArray juris = static_cast<jobjectArray>(uris.object());
+                jobjectArray juris = uris.object<jobjectArray>();
                 const jint nUris = env->GetArrayLength(juris);
                 urls.reserve(static_cast<int>(nUris));
                 for (int i = 0; i < nUris; ++i)
diff --git a/src/plugins/platforms/android/qandroidassetsfileenginehandler.cpp b/src/plugins/platforms/android/qandroidassetsfileenginehandler.cpp
index 2dbb1044f02..15c0aada954 100644
--- a/src/plugins/platforms/android/qandroidassetsfileenginehandler.cpp
+++ b/src/plugins/platforms/android/qandroidassetsfileenginehandler.cpp
@@ -147,7 +147,7 @@ class FolderIterator : public AssetItemList
                                                                             QtAndroid::assets(), QJniObject::fromString(path).object());
         if (files.isValid()) {
             QJniEnvironment env;
-            jobjectArray jFiles = static_cast<jobjectArray>(files.object());
+            jobjectArray jFiles = files.object<jobjectArray>();
             const jint nFiles = env->GetArrayLength(jFiles);
             for (int i = 0; i < nFiles; ++i) {
                 AssetItem item{QJniObject::fromLocalRef(env->GetObjectArrayElement(jFiles, i)).toString()};
diff --git a/src/plugins/tls/openssl/qsslsocket_openssl_android.cpp b/src/plugins/tls/openssl/qsslsocket_openssl_android.cpp
index 7f7f067fa2b..1c11377c0e7 100644
--- a/src/plugins/tls/openssl/qsslsocket_openssl_android.cpp
+++ b/src/plugins/tls/openssl/qsslsocket_openssl_android.cpp
@@ -70,7 +70,7 @@ QList<QByteArray> fetchSslCertificateData()
         return certificateData;
 
     QJniEnvironment env;
-    jobjectArray jcertificates = static_cast<jobjectArray>(certificates.object());
+    jobjectArray jcertificates = certificates.object<jobjectArray>();
     const jint nCertificates = env->GetArrayLength(jcertificates);
     certificateData.reserve(static_cast<int>(nCertificates));