Add QAndroidApplication as a nativeInterface

QAndroidApplication provides the Android specific app context() and
isActivityContext() to determine whether the context is an Activity or
otherwise a Service.

Task-number: QTBUG-90499
Change-Id: Iae2eef7ec44859a89825b09f52f09506b20b5420
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

10 files changed, 196 insertions, 50 deletions

diff --git a/src/corelib/CMakeLists.txt b/src/corelib/CMakeLists.txt
index 1106aaae71..ebbe5851bb 100644
--- a/src/corelib/CMakeLists.txt
+++ b/src/corelib/CMakeLists.txt
@@ -94,6 +94,7 @@ qt_internal_add_module(Core
         kernel/qassociativeiterable.cpp kernel/qassociativeiterable.h
         kernel/qbasictimer.cpp kernel/qbasictimer.h
         kernel/qcoreapplication.cpp kernel/qcoreapplication.h kernel/qcoreapplication_p.h
+        kernel/qcoreapplication_platform.h
         kernel/qcorecmdlineargs_p.h
         kernel/qcoreevent.cpp kernel/qcoreevent.h
         kernel/qcoreglobaldata.cpp kernel/qcoreglobaldata_p.h
@@ -996,6 +997,7 @@ qt_internal_extend_target(Core CONDITION ANDROID AND NOT ANDROID_EMBEDDED
         kernel/qjniobject.cpp kernel/qjniobject.h
         kernel/qjnihelpers.cpp kernel/qjnihelpers_p.h
         kernel/qjnionload.cpp
+        platform/android/qandroidnativeinterface.cpp
 )
 
 qt_internal_extend_target(Core CONDITION HAIKU AND (ANDROID_EMBEDDED OR NOT ANDROID)
diff --git a/src/corelib/io/qstandardpaths_android.cpp b/src/corelib/io/qstandardpaths_android.cpp
index 46f96e4037..129ae03158 100644
--- a/src/corelib/io/qstandardpaths_android.cpp
+++ b/src/corelib/io/qstandardpaths_android.cpp
@@ -41,11 +41,13 @@
 
 #ifndef QT_NO_STANDARDPATHS
 
-#include <QJniObject>
-#include <QtCore/private/qjnihelpers_p.h>
+#include <QtCore/qjniobject.h>
 #include <QtCore/qmap.h>
+#include <QtCore/qcoreapplication.h>
 #include <QDir>
 
+using namespace QNativeInterface;
+
 QT_BEGIN_NAMESPACE
 
 typedef QMap<QString, QString> AndroidDirCache;
@@ -57,24 +59,6 @@ static QString testDir()
                                                : QLatin1String("");
 }
 
-static QJniObject applicationContext()
-{
-    static QJniObject appCtx;
-    if (appCtx.isValid())
-        return appCtx;
-
-    QJniObject context(QtAndroidPrivate::activity());
-    if (!context.isValid()) {
-        context = QtAndroidPrivate::service();
-        if (!context.isValid())
-            return appCtx;
-    }
-
-    appCtx = context.callObjectMethod("getApplicationContext",
-                                      "()Landroid/content/Context;");
-    return appCtx;
-}
-
 static inline QString getAbsolutePath(const QJniObject &file)
 {
     QJniObject path = file.callObjectMethod("getAbsolutePath",
@@ -95,7 +79,7 @@ static QString getExternalFilesDir(const char *directoryField = nullptr)
     if (!path.isEmpty())
         return path;
 
-    QJniObject appCtx = applicationContext();
+    QJniObject appCtx = QAndroidApplication::context();
     if (!appCtx.isValid())
         return QString();
 
@@ -128,7 +112,7 @@ static QString getExternalCacheDir()
     if (!path.isEmpty())
         return path;
 
-    QJniObject appCtx = applicationContext();
+    QJniObject appCtx = QAndroidApplication::context();
     if (!appCtx.isValid())
         return QString();
 
@@ -150,7 +134,7 @@ static QString getCacheDir()
     if (!path.isEmpty())
         return path;
 
-    QJniObject appCtx = applicationContext();
+    QJniObject appCtx = QAndroidApplication::context();
     if (!appCtx.isValid())
         return QString();
 
@@ -172,7 +156,7 @@ static QString getFilesDir()
     if (!path.isEmpty())
         return path;
 
-    QJniObject appCtx = applicationContext();
+    QJniObject appCtx = QAndroidApplication::context();
     if (!appCtx.isValid())
         return QString();
 
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index 781791c971..ccdece6357 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -91,8 +91,7 @@
 #endif // QT_NO_QOBJECT
 
 #if defined(Q_OS_ANDROID) && !defined(Q_OS_ANDROID_EMBEDDED)
-#include <QJniObject>
-#include <private/qjnihelpers_p.h>
+#include <QtCore/qjniobject.h>
 #endif
 
 #ifdef Q_OS_MAC
@@ -170,7 +169,7 @@ QString QCoreApplicationPrivate::appVersion() const
 #  ifdef Q_OS_DARWIN
     applicationVersion = infoDictionaryStringProperty(QStringLiteral("CFBundleVersion"));
 #  elif defined(Q_OS_ANDROID) && !defined(Q_OS_ANDROID_EMBEDDED)
-    QJniObject context(QtAndroidPrivate::context());
+    QJniObject context(QNativeInterface::QAndroidApplication::context());
     if (context.isValid()) {
         QJniObject pm = context.callObjectMethod(
             "getPackageManager", "()Landroid/content/pm/PackageManager;");
diff --git a/src/corelib/kernel/qcoreapplication.h b/src/corelib/kernel/qcoreapplication.h
index dabc518ad2..6539441180 100644
--- a/src/corelib/kernel/qcoreapplication.h
+++ b/src/corelib/kernel/qcoreapplication.h
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2020 The Qt Company Ltd.
+** Copyright (C) 2021 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtCore module of the Qt Toolkit.
@@ -246,4 +246,6 @@ Q_CORE_EXPORT QDebug operator<<(QDebug, const MSG &);
 
 QT_END_NAMESPACE
 
+#include <QtCore/qcoreapplication_platform.h>
+
 #endif // QCOREAPPLICATION_H
diff --git a/src/corelib/kernel/qcoreapplication_platform.h b/src/corelib/kernel/qcoreapplication_platform.h
new file mode 100644
index 0000000000..8dc1199135
--- /dev/null
+++ b/src/corelib/kernel/qcoreapplication_platform.h
@@ -0,0 +1,66 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QCOREAPPLICATION_PLATFORM_H
+#define QCOREAPPLICATION_PLATFORM_H
+
+#include <QtCore/qglobal.h>
+
+#if defined(Q_OS_ANDROID) && !defined(Q_OS_ANDROID_EMBEDDED)
+class _jobject;
+typedef _jobject* jobject;
+#endif
+
+QT_BEGIN_NAMESPACE
+
+namespace QNativeInterface
+{
+#if defined(Q_OS_ANDROID) && !defined(Q_OS_ANDROID_EMBEDDED) || defined(Q_CLANG_QDOC)
+struct Q_CORE_EXPORT QAndroidApplication
+{
+    QT_DECLARE_NATIVE_INTERFACE(QAndroidApplication)
+    static jobject context();
+    static bool isActivityContext();
+};
+#endif
+}
+
+QT_END_NAMESPACE
+
+#endif // QCOREAPPLICATION_PLATFORM_H
diff --git a/src/corelib/platform/android/qandroidnativeinterface.cpp b/src/corelib/platform/android/qandroidnativeinterface.cpp
new file mode 100644
index 0000000000..74d21c5d4c
--- /dev/null
+++ b/src/corelib/platform/android/qandroidnativeinterface.cpp
@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/qcoreapplication.h>
+#include <QtCore/private/qjnihelpers_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \class QNativeInterface::QAndroidApplication
+    \since 6.2
+    \brief Native interface to a core application on Android.
+
+    Accessed through QCoreApplication::nativeInterface().
+
+    \inmodule QtCore
+    \inheaderfile QCoreApplication
+    \ingroup native-interfaces
+    \ingroup native-interfaces-qcoreapplication
+*/
+QT_DEFINE_NATIVE_INTERFACE(QAndroidApplication);
+
+/*!
+     \fn jobject QNativeInterface::QAndroidApplication::context()
+
+    Returns the Android context as a \c jobject. The context is an \c Activity
+    if the main activity object is valid. Otherwise, the context is a \c Service.
+
+    \since 6.2
+*/
+jobject QNativeInterface::QAndroidApplication::context()
+{
+    return QtAndroidPrivate::context();
+}
+
+/*!
+     \fn bool QNativeInterface::QAndroidApplication::isActivityContext()
+
+    Returns \c true if QAndroidApplication::context() provides an \c Activity
+    context.
+
+    \since 6.2
+*/
+bool QNativeInterface::QAndroidApplication::isActivityContext()
+{
+    return QtAndroidPrivate::activity();
+}
+
+QT_END_NAMESPACE
diff --git a/src/network/kernel/qnetworkproxy_android.cpp b/src/network/kernel/qnetworkproxy_android.cpp
index a09593bf3c..aba4cd3ec3 100644
--- a/src/network/kernel/qnetworkproxy_android.cpp
+++ b/src/network/kernel/qnetworkproxy_android.cpp
@@ -39,9 +39,8 @@
 
 #include "qnetworkproxy.h"
 
-#include <QtCore/QJniEnvironment>
-#include <QtCore/QJniObject>
-#include <QtCore/private/qjnihelpers_p.h>
+#include <QtCore/qjnienvironment.h>
+#include <QtCore/qjniobject.h>
 
 #ifndef QT_NO_NETWORKPROXY
 
@@ -54,6 +53,8 @@ public:
     ~ProxyInfoObject();
 };
 
+using namespace QNativeInterface;
+
 Q_GLOBAL_STATIC(ProxyInfoObject, proxyInfoInstance)
 
 static const char networkClass[] = "org/qtproject/qt/android/network/QtNetwork";
@@ -63,7 +64,7 @@ ProxyInfoObject::ProxyInfoObject()
     QJniObject::callStaticMethod<void>(networkClass,
                                        "registerReceiver",
                                        "(Landroid/content/Context;)V",
-                                       QtAndroidPrivate::context());
+                                       QAndroidApplication::context());
 }
 
 ProxyInfoObject::~ProxyInfoObject()
@@ -71,7 +72,7 @@ ProxyInfoObject::~ProxyInfoObject()
     QJniObject::callStaticMethod<void>(networkClass,
                                        "unregisterReceiver",
                                        "(Landroid/content/Context;)V",
-                                       QtAndroidPrivate::context());
+                                       QAndroidApplication::context());
 }
 
 QList<QNetworkProxy> QNetworkProxyFactory::systemProxyForQuery(const QNetworkProxyQuery &query)
@@ -83,7 +84,7 @@ QList<QNetworkProxy> QNetworkProxyFactory::systemProxyForQuery(const QNetworkPro
     QJniObject proxyInfo = QJniObject::callStaticObjectMethod(networkClass,
                                       "getProxyInfo",
                                       "(Landroid/content/Context;)Landroid/net/ProxyInfo;",
-                                      QtAndroidPrivate::context());
+                                      QAndroidApplication::context());
     if (proxyInfo.isValid()) {
         QJniObject exclusionList = proxyInfo.callObjectMethod("getExclusionList",
                                                               "()[Ljava/lang/String;");
diff --git a/src/plugins/networkinformationbackends/android/wrapper/androidconnectivitymanager.cpp b/src/plugins/networkinformationbackends/android/wrapper/androidconnectivitymanager.cpp
index c22f16f7b4..1508ff35b8 100644
--- a/src/plugins/networkinformationbackends/android/wrapper/androidconnectivitymanager.cpp
+++ b/src/plugins/networkinformationbackends/android/wrapper/androidconnectivitymanager.cpp
@@ -39,11 +39,13 @@
 
 #include "androidconnectivitymanager.h"
 
-#include <QtCore/private/qjnihelpers_p.h>
+#include <QtCore/qcoreapplication.h>
 #include <QtCore/qjnienvironment.h>
 
 QT_BEGIN_NAMESPACE
 
+using namespace QNativeInterface;
+
 struct AndroidConnectivityManagerInstance
 {
     AndroidConnectivityManagerInstance() : connManager(new AndroidConnectivityManager) { }
@@ -67,12 +69,12 @@ AndroidConnectivityManager::AndroidConnectivityManager()
     m_connectivityManager = QJniObject::callStaticObjectMethod(
             networkInformationClass, "getConnectivityManager",
             "(Landroid/content/Context;)Landroid/net/ConnectivityManager;",
-            QtAndroidPrivate::context());
+            QAndroidApplication::context());
     if (!m_connectivityManager.isValid())
         return;
 
     QJniObject::callStaticMethod<void>(networkInformationClass, "registerReceiver",
-                                       "(Landroid/content/Context;)V", QtAndroidPrivate::context());
+                                       "(Landroid/content/Context;)V", QAndroidApplication::context());
 }
 
 AndroidConnectivityManager *AndroidConnectivityManager::getInstance()
@@ -87,7 +89,7 @@ AndroidConnectivityManager *AndroidConnectivityManager::getInstance()
 AndroidConnectivityManager::~AndroidConnectivityManager()
 {
     QJniObject::callStaticMethod<void>(networkInformationClass, "unregisterReceiver",
-                                       "(Landroid/content/Context;)V", QtAndroidPrivate::context());
+                                       "(Landroid/content/Context;)V", QAndroidApplication::context());
 }
 
 AndroidConnectivityManager::AndroidConnectivity AndroidConnectivityManager::networkConnectivity()
diff --git a/src/plugins/platforms/android/androidcontentfileengine.cpp b/src/plugins/platforms/android/androidcontentfileengine.cpp
index 149bc1139d..9cea454c16 100644
--- a/src/plugins/platforms/android/androidcontentfileengine.cpp
+++ b/src/plugins/platforms/android/androidcontentfileengine.cpp
@@ -1,6 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2019 Volker Krause <vkrause@kde.org>
+** Copyright (C) 2021 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the plugins of the Qt Toolkit.
@@ -39,12 +40,14 @@
 
 #include "androidcontentfileengine.h"
 
-#include <QtCore/QJniEnvironment>
-#include <QtCore/QJniObject>
-#include <private/qjnihelpers_p.h>
+#include <QtCore/qcoreapplication.h>
+#include <QtCore/qjnienvironment.h>
+#include <QtCore/qjniobject.h>
 
 #include <QDebug>
 
+using namespace QNativeInterface;
+
 AndroidContentFileEngine::AndroidContentFileEngine(const QString &f)
     : m_file(f)
 {
@@ -69,7 +72,7 @@ bool AndroidContentFileEngine::open(QIODevice::OpenMode openMode)
     const auto fd = QJniObject::callStaticMethod<jint>("org/qtproject/qt/android/QtNative",
         "openFdForContentUrl",
         "(Landroid/content/Context;Ljava/lang/String;Ljava/lang/String;)I",
-        QtAndroidPrivate::context(),
+        QAndroidApplication::context(),
         QJniObject::fromString(fileName(DefaultName)).object(),
         QJniObject::fromString(openModeStr).object());
 
@@ -84,7 +87,7 @@ qint64 AndroidContentFileEngine::size() const
 {
     const jlong size = QJniObject::callStaticMethod<jlong>(
             "org/qtproject/qt/android/QtNative", "getSize",
-            "(Landroid/content/Context;Ljava/lang/String;)J", QtAndroidPrivate::context(),
+            "(Landroid/content/Context;Ljava/lang/String;)J", QAndroidApplication::context(),
             QJniObject::fromString(fileName(DefaultName)).object());
     return (qint64)size;
 }
@@ -95,12 +98,12 @@ AndroidContentFileEngine::FileFlags AndroidContentFileEngine::fileFlags(FileFlag
     FileFlags flags;
     const bool isDir = QJniObject::callStaticMethod<jboolean>(
             "org/qtproject/qt/android/QtNative", "checkIfDir",
-            "(Landroid/content/Context;Ljava/lang/String;)Z", QtAndroidPrivate::context(),
+            "(Landroid/content/Context;Ljava/lang/String;)Z", QAndroidApplication::context(),
             QJniObject::fromString(fileName(DefaultName)).object());
     // If it is a directory then we know it exists so there is no reason to explicitly check
     const bool exists = isDir ? true : QJniObject::callStaticMethod<jboolean>(
             "org/qtproject/qt/android/QtNative", "checkFileExists",
-            "(Landroid/content/Context;Ljava/lang/String;)Z", QtAndroidPrivate::context(),
+            "(Landroid/content/Context;Ljava/lang/String;)Z", QAndroidApplication::context(),
             QJniObject::fromString(fileName(DefaultName)).object());
     if (!exists && !isDir)
         return flags;
@@ -110,7 +113,7 @@ AndroidContentFileEngine::FileFlags AndroidContentFileEngine::fileFlags(FileFlag
         flags = FileType | commonFlags;
         const bool writable = QJniObject::callStaticMethod<jboolean>(
             "org/qtproject/qt/android/QtNative", "checkIfWritable",
-            "(Landroid/content/Context;Ljava/lang/String;)Z", QtAndroidPrivate::context(),
+            "(Landroid/content/Context;Ljava/lang/String;)Z", QAndroidApplication::context(),
             QJniObject::fromString(fileName(DefaultName)).object());
         if (writable)
             flags |= WriteOwnerPerm|WriteUserPerm|WriteGroupPerm|WriteOtherPerm;
@@ -186,13 +189,13 @@ bool AndroidContentFileEngineIterator::hasNext() const
         const bool isDir = QJniObject::callStaticMethod<jboolean>(
                              "org/qtproject/qt/android/QtNative", "checkIfDir",
                              "(Landroid/content/Context;Ljava/lang/String;)Z",
-                             QtAndroidPrivate::context(),
+                             QAndroidApplication::context(),
                              QJniObject::fromString(path()).object());
         if (isDir) {
             QJniObject objArray = QJniObject::callStaticObjectMethod("org/qtproject/qt/android/QtNative",
                                            "listContentsFromTreeUri",
                                            "(Landroid/content/Context;Ljava/lang/String;)[Ljava/lang/String;",
-                                           QtAndroidPrivate::context(),
+                                           QAndroidApplication::context(),
                                            QJniObject::fromString(path()).object());
             if (objArray.isValid()) {
                 QJniEnvironment env;
diff --git a/src/plugins/platforms/android/qandroidplatformservices.cpp b/src/plugins/platforms/android/qandroidplatformservices.cpp
index b5f829d3d3..36e1aef609 100644
--- a/src/plugins/platforms/android/qandroidplatformservices.cpp
+++ b/src/plugins/platforms/android/qandroidplatformservices.cpp
@@ -1,6 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2012 BogDan Vatra <bogdan@kde.org>
+** Copyright (C) 2021 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the plugins of the Qt Toolkit.
@@ -44,7 +45,7 @@
 #include <QMimeDatabase>
 #include <QUrl>
 #include <QtCore/QJniObject>
-#include <private/qjnihelpers_p.h>
+#include <QtCore/qcoreapplication.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -67,12 +68,13 @@ bool QAndroidPlatformServices::openUrl(const QUrl &theUrl)
         mime = mimeDb.mimeTypeForUrl(url).name();
     }
 
+    using namespace QNativeInterface;
     QJniObject urlString = QJniObject::fromString(url.toString());
     QJniObject mimeString = QJniObject::fromString(mime);
     return QJniObject::callStaticMethod<jboolean>(
             QtAndroid::applicationClass(), "openURL",
             "(Landroid/content/Context;Ljava/lang/String;Ljava/lang/String;)Z",
-            QtAndroidPrivate::context(), urlString.object(), mimeString.object());
+            QAndroidApplication::context(), urlString.object(), mimeString.object());
 }
 
 bool QAndroidPlatformServices::openDocument(const QUrl &url)