Add new method to get the main Android activity.

There were no public APIs the user could use to get access to
their applications main activity, and thus far the only solution have
been to access undocumented and private APIs.

[ChangeLog][QtAndroidExtras] Added functionality to get the Android main
activity.

Change-Id: Ifd4121e8bc643360ed7a7038ffae9e872b59db71
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

src/androidextras/android/android.pri

+SOURCES += \
+           $$PWD/qandroidfunctions.cpp
+HEADERS += \
+           $$PWD/qandroidfunctions.h
\ No newline at end of file

src/androidextras/android/qandroidfunctions.cpp

+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qandroidfunctions.h"
+
+#include <QtCore/private/qjnihelpers_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*!
+    \namespace QtAndroid
+    \inmodule QtAndroidExtras
+    \since 5.3
+    \brief The QtAndroid namespace provides miscellaneous functions to aid Android development.
+    \inheaderfile QtAndroid
+*/
+
+/*!
+    \since 5.3
+    \fn QAndroidJniObject QtAndroid::androidActivity()
+
+    Returns a handle to this applications main Activity
+
+    \sa QAndroidJniObject
+*/
+QAndroidJniObject QtAndroid::androidActivity()
+{
+    return QtAndroidPrivate::activity();
+}
+
+QT_END_NAMESPACE

src/androidextras/android/qandroidfunctions.h

+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QANDROIDFUNCTIONS_H
+#define QANDROIDFUNCTIONS_H
+
+#if 0
+#pragma qt_class(QtAndroid)
+#endif
+
+#include <QtAndroidExtras/qandroidextrasglobal.h>
+#include <QtAndroidExtras/qandroidjniobject.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QtAndroid
+{
+    Q_ANDROIDEXTRAS_EXPORT QAndroidJniObject androidActivity();
+}
+
+QT_END_NAMESPACE
+
+#endif // QANDROIDFUNCTIONS_H

src/androidextras/androidextras.pro

@@ -4,5 +4,7 @@ QMAKE_DOCS = \
              $$PWD/doc/qtandroidextras.qdocconf
 QT -= gui
 QT += core-private
+
 load(qt_module)
 include(jni/jni.pri)
+include(android/android.pri)

src/androidextras/doc/qtandroidextras.qdocconf

 include($QT_INSTALL_DOCS/global/qt-module-defaults.qdocconf)
 
+Cpp.ignoretokens += Q_ANDROIDEXTRAS_EXPORT
+
 project = QtAndroidExtras
 description = Qt Android Extras Reference Documentation
 url = http://qt-project.org/doc/qt-$QT_VER
@@ -19,10 +21,10 @@ qhp.QtAndroidExtras.filterAttributes = qtandroidextras $QT_VERSION qtrefdoc
 qhp.QtAndroidExtras.customFilters.Qt.name = QtAndroidExtras $QT_VERSION
 qhp.QtAndroidExtras.customFilters.Qt.filterAttributes = qtandroidextras $QT_VERSION
 
-qhp.QtAndroidExtras.subprojects = classes
-qhp.QtAndroidExtras.subprojects.classes.title = C++ Classes
+qhp.QtAndroidExtras.subprojects = classes examples
+qhp.QtAndroidExtras.subprojects.classes.title = C++ Classes and Namespaces
 qhp.QtAndroidExtras.subprojects.classes.indexTitle = Qt Android Extras C++ Classes
-qhp.QtAndroidExtras.subprojects.classes.selectors = class fake:headerfile
+qhp.QtAndroidExtras.subprojects.classes.selectors = class function namespace fake:headerfile
 qhp.QtAndroidExtras.subprojects.classes.sortPages = true
 qhp.QtAndroidExtras.subprojects.examples.title = Examples
 qhp.QtAndroidExtras.subprojects.examples.indexTitle = Qt Android Extras Examples

src/androidextras/doc/src/qtandroidextras-index.qdoc

@@ -50,7 +50,7 @@
 
     Links to the API reference materials:
     \list
-    \li \l{Qt Android Extras C++ Classes}{C++ Classes}
+    \li \l{Qt Android Extras C++ Classes}{C++ Classes and Namespaces}
     \endlist
 
     \section1 Examples

tests/auto/auto.pro

@@ -2,4 +2,5 @@ TEMPLATE = subdirs
 SUBDIRS += \
         cmake \
         qandroidjnienvironment \
-        qandroidjniobject
+        qandroidjniobject \
+        qandroidfunctions

tests/auto/qandroidfunctions/qandroidfunctions.pro

+CONFIG += testcase
+TARGET = tst_qandroidfunctions
+QT += testlib androidextras
+SOURCES += tst_qandroidfunctions.cpp

tests/auto/qandroidfunctions/tst_qandroidfunctions.cpp

+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the test suite 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <QtAndroidExtras/QtAndroid>
+
+class tst_QAndroidFunctions : public QObject
+{
+    Q_OBJECT
+private slots:
+    void testAndroidActivity();
+};
+
+void tst_QAndroidFunctions::testAndroidActivity()
+{
+    QAndroidJniObject activity = QtAndroid::androidActivity();
+    QVERIFY(activity.isValid());
+    QVERIFY(activity.callMethod<jboolean>("isTaskRoot"));
+}
+
+QTEST_APPLESS_MAIN(tst_QAndroidFunctions)
+
+#include "tst_qandroidfunctions.moc"