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diff --git a/src/imports/controls/material/impl/qquickmaterialbusyindicator.cpp b/src/imports/controls/material/impl/qquickmaterialbusyindicator.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** 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 http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://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.LGPLv3 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.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 later 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 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickmaterialbusyindicator_p.h"
+
+#include <QtCore/qmath.h>
+#include <QtCore/qeasingcurve.h>
+#include <QtGui/qpainter.h>
+#include <QtQuick/qsgimagenode.h>
+#include <QtQuick/qquickwindow.h>
+#include <QtQuickControls2Impl/private/qquickanimatednode_p.h>
+
+QT_BEGIN_NAMESPACE
+
+/*
+    Relevant Android code:
+
+    - core/res/res/anim/progress_indeterminate_rotation_material.xml contains
+      the rotation animation data.
+    - core/res/res/anim/progress_indeterminate_material.xml contains the trim
+      animation data.
+    - core/res/res/interpolator/trim_start_interpolator.xml and
+      core/res/res/interpolator/trim_end_interpolator.xml contain the start
+      and end trim path interpolators.
+    - addCommand() in core/java/android/util/PathParser.java has a list of the
+      different path commands available.
+*/
+
+static const int SpanAnimationDuration = 700;
+static const int RotationAnimationDuration = SpanAnimationDuration * 6;
+static const int TargetRotation = 720;
+static const int OneDegree = 16;
+static const qreal MinSweepSpan = 10 * OneDegree;
+static const qreal MaxSweepSpan = 300 * OneDegree;
+
+class QQuickMaterialBusyIndicatorNode : public QQuickAnimatedNode
+{
+public:
+    QQuickMaterialBusyIndicatorNode(QQuickMaterialBusyIndicator *item);
+
+    void sync(QQuickItem *item) override;
+
+protected:
+    void updateCurrentTime(int time) override;
+
+private:
+    int m_lastStartAngle = 0;
+    int m_lastEndAngle = 0;
+    qreal m_width = 0;
+    qreal m_height = 0;
+    qreal m_devicePixelRatio = 1;
+    QColor m_color;
+};
+
+QQuickMaterialBusyIndicatorNode::QQuickMaterialBusyIndicatorNode(QQuickMaterialBusyIndicator *item)
+    : QQuickAnimatedNode(item)
+{
+    setLoopCount(Infinite);
+    setCurrentTime(item->elapsed());
+    setDuration(RotationAnimationDuration);
+
+    QSGImageNode *textureNode = item->window()->createImageNode();
+    textureNode->setOwnsTexture(true);
+    appendChildNode(textureNode);
+
+    // A texture seems to be required here, but we don't have one yet, as we haven't drawn anything,
+    // so just use a blank image.
+    QImage blankImage(item->width(), item->height(), QImage::Format_ARGB32_Premultiplied);
+    blankImage.fill(Qt::transparent);
+    textureNode->setTexture(item->window()->createTextureFromImage(blankImage));
+}
+
+void QQuickMaterialBusyIndicatorNode::updateCurrentTime(int time)
+{
+    const qreal w = m_width;
+    const qreal h = m_height;
+    const qreal size = qMin(w, h);
+    const qreal dx = (w - size) / 2;
+    const qreal dy = (h - size) / 2;
+
+    QImage image(size * m_devicePixelRatio, size * m_devicePixelRatio, QImage::Format_ARGB32_Premultiplied);
+    image.fill(Qt::transparent);
+
+    QPainter painter(&image);
+    painter.setRenderHint(QPainter::Antialiasing);
+
+    QPen pen;
+    QSGImageNode *textureNode = static_cast<QSGImageNode *>(firstChild());
+    pen.setColor(m_color);
+    pen.setWidth(qCeil(size / 12) * m_devicePixelRatio);
+    painter.setPen(pen);
+
+    const qreal percentageComplete = time / qreal(RotationAnimationDuration);
+    const qreal spanPercentageComplete = (time % SpanAnimationDuration) / qreal(SpanAnimationDuration);
+    const int iteration = time / SpanAnimationDuration;
+    int startAngle = 0;
+    int endAngle = 0;
+
+    if (iteration % 2 == 0) {
+        if (m_lastStartAngle > 360 * OneDegree)
+            m_lastStartAngle -= 360 * OneDegree;
+
+        // The start angle is only affected by the rotation animation for the "grow" phase.
+        startAngle = m_lastStartAngle;
+        QEasingCurve angleCurve(QEasingCurve::OutQuad);
+        const qreal percentage = angleCurve.valueForProgress(spanPercentageComplete);
+        endAngle = m_lastStartAngle + MinSweepSpan + percentage * (MaxSweepSpan - MinSweepSpan);
+        m_lastEndAngle = endAngle;
+    } else {
+        // Both the start angle *and* the span are affected by the "shrink" phase.
+        QEasingCurve angleCurve(QEasingCurve::InQuad);
+        const qreal percentage = angleCurve.valueForProgress(spanPercentageComplete);
+        startAngle = m_lastEndAngle - MaxSweepSpan + percentage * (MaxSweepSpan - MinSweepSpan);
+        endAngle = m_lastEndAngle;
+        m_lastStartAngle = startAngle;
+    }
+
+    const int halfPen = pen.width() / 2;
+    const QRectF arcBounds = QRectF(halfPen, halfPen,
+                                    m_devicePixelRatio * size - pen.width(),
+                                    m_devicePixelRatio * size - pen.width());
+    // The current angle of the rotation animation.
+    const qreal rotation = OneDegree * percentageComplete * -TargetRotation;
+    startAngle -= rotation;
+    endAngle -= rotation;
+    const int angleSpan = endAngle - startAngle;
+    painter.drawArc(arcBounds, -startAngle, -angleSpan);
+    painter.end();
+
+    textureNode->setRect(QRectF(dx, dy, size, size));
+    textureNode->setTexture(window()->createTextureFromImage(image));
+}
+
+void QQuickMaterialBusyIndicatorNode::sync(QQuickItem *item)
+{
+    QQuickMaterialBusyIndicator *indicator = static_cast<QQuickMaterialBusyIndicator *>(item);
+    m_color = indicator->color();
+    m_width = indicator->width();
+    m_height = indicator->height();
+    m_devicePixelRatio = indicator->window()->effectiveDevicePixelRatio();
+}
+
+QQuickMaterialBusyIndicator::QQuickMaterialBusyIndicator(QQuickItem *parent) :
+    QQuickItem(parent)
+{
+    setFlag(ItemHasContents);
+}
+
+QColor QQuickMaterialBusyIndicator::color() const
+{
+    return m_color;
+}
+
+void QQuickMaterialBusyIndicator::setColor(const QColor &color)
+{
+    if (m_color == color)
+        return;
+
+    m_color = color;
+    update();
+}
+
+bool QQuickMaterialBusyIndicator::isRunning() const
+{
+    return isVisible();
+}
+
+void QQuickMaterialBusyIndicator::setRunning(bool running)
+{
+    if (running)
+        setVisible(true);
+}
+
+int QQuickMaterialBusyIndicator::elapsed() const
+{
+    return m_elapsed;
+}
+
+void QQuickMaterialBusyIndicator::itemChange(QQuickItem::ItemChange change, const QQuickItem::ItemChangeData &data)
+{
+    QQuickItem::itemChange(change, data);
+    switch (change) {
+    case ItemOpacityHasChanged:
+        if (qFuzzyIsNull(data.realValue))
+            setVisible(false);
+        break;
+    case ItemVisibleHasChanged:
+        update();
+        break;
+    default:
+        break;
+    }
+}
+
+QSGNode *QQuickMaterialBusyIndicator::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
+{
+    QQuickMaterialBusyIndicatorNode *node = static_cast<QQuickMaterialBusyIndicatorNode *>(oldNode);
+    if (isRunning() && width() > 0 && height() > 0) {
+        if (!node) {
+            node = new QQuickMaterialBusyIndicatorNode(this);
+            node->start();
+        }
+        node->sync(this);
+    } else {
+        m_elapsed = node ? node->currentTime() : 0;
+        delete node;
+        node = nullptr;
+    }
+    return node;
+}
+
+QT_END_NAMESPACE