Sensor implementation for Android

    Based on the Necessitas project by Bogdan Vatra.
    Contributors to the Qt5 project:

    BogDan Vatra <bogdan@kde.org>
    Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
    Paul Olav Tvete <paul.tvete@digia.com>

    The full history of the Qt5 port can be found in refs/old-heads/android,
    SHA-1 caa4103a80ef90db5eb9836f6b6028b7ce36c73a

Change-Id: I57e772ee5079c0ea74f685b65ae2864d73e7c750
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

3 files changed, 177 insertions, 0 deletions

diff --git a/src/plugins/sensors/android/jar/AndroidManifest.xml b/src/plugins/sensors/android/jar/AndroidManifest.xml
new file mode 100644
index 00000000..5d15cab2
--- /dev/null
+++ b/src/plugins/sensors/android/jar/AndroidManifest.xml
@@ -0,0 +1,6 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="org.qtproject.qt5.android.sensors"
+    android:versionCode="1"
+    android:versionName="1.0" >
+    <supports-screens android:largeScreens="true" android:normalScreens="true" android:anyDensity="true" android:smallScreens="true"/>
+</manifest>
diff --git a/src/plugins/sensors/android/jar/jar.pro b/src/plugins/sensors/android/jar/jar.pro
new file mode 100644
index 00000000..a9350743
--- /dev/null
+++ b/src/plugins/sensors/android/jar/jar.pro
@@ -0,0 +1,10 @@
+load(qt_build_paths)
+
+CONFIG += java
+TARGET = QtSensors
+DESTDIR = $$MODULE_BASE_OUTDIR/jar
+
+JAVACLASSPATH += $$PWD/src
+
+JAVASOURCES += \
+    $$PWD/src/org/qtproject/qt5/android/sensors/QtSensors.java
diff --git a/src/plugins/sensors/android/jar/src/org/qtproject/qt5/android/sensors/QtSensors.java b/src/plugins/sensors/android/jar/src/org/qtproject/qt5/android/sensors/QtSensors.java
new file mode 100644
index 00000000..c7956d2d
--- /dev/null
+++ b/src/plugins/sensors/android/jar/src/org/qtproject/qt5/android/sensors/QtSensors.java
@@ -0,0 +1,161 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 BogDan Vatra <bogdan@kde.org>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtSensor 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 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.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+package org.qtproject.qt5.android.sensors;
+
+import java.util.HashSet;
+import java.util.List;
+
+import android.app.Activity;
+import android.hardware.Sensor;
+import android.hardware.SensorEvent;
+import android.hardware.SensorEventListener;
+import android.hardware.SensorManager;
+import android.os.Build;
+import android.util.SparseArray;
+
+import android.util.Log;
+
+public class QtSensors implements SensorEventListener
+{
+    static final QtSensors m_sensorsListener = new QtSensors();
+    static SensorManager m_sensorManager = null;
+    static SparseArray<Sensor> m_registeredSensors = new SparseArray<Sensor>();
+    static Object m_syncObject = new Object();
+    static public void setActivity(Activity activity, Object acitvityDelegate)
+    {
+        try {
+            m_sensorManager = (SensorManager)activity.getSystemService(Activity.SENSOR_SERVICE);
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    private static String getSensorDescription(int sensorType)
+    {
+        try {
+            Sensor s  = m_sensorManager.getDefaultSensor(sensorType);
+            return s.getName() + " " + s.getVendor() + " v" + s.getVersion();
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private static int[] getSensorList()
+    {
+        try {
+            List<Sensor> list = m_sensorManager.getSensorList(Sensor.TYPE_ALL);
+            HashSet<Integer> filteredList = new HashSet<Integer>();
+            for (Sensor s : list)
+                filteredList.add(s.getType());
+            int retList[] = new int[filteredList.size()];
+            int pos = 0;
+            for (int type : filteredList)
+                retList[pos++] = type;
+            return retList;
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private static boolean registerSensor(int sensorType, int rate)
+    {
+        synchronized (m_syncObject) {
+            try {
+                Sensor s  = m_sensorManager.getDefaultSensor(sensorType);
+                m_sensorManager.registerListener(m_sensorsListener, s, rate);
+                m_registeredSensors.put(sensorType, s);
+            } catch(Exception e) {
+                e.printStackTrace();
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private static boolean unregisterSensor(int sensorType)
+    {
+        synchronized (m_syncObject) {
+            try {
+                Sensor s = m_registeredSensors.get(sensorType);
+                if (s != null) {
+                    m_sensorManager.unregisterListener(m_sensorsListener, m_registeredSensors.get(sensorType));
+                    m_registeredSensors.remove(sensorType);
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private static float[] convertQuaternionToEuler(float[] rotationVector)
+    {
+        float matrix[] = new float[9];
+        SensorManager.getRotationMatrixFromVector (matrix, rotationVector);
+        float angles[] = new float[3];
+        SensorManager.getOrientation (matrix, angles);
+        return angles;
+    }
+
+    public static native void accuracyChanged(int sensorType, int accuracy);
+    public static native void sensorChanged(int sensorType, long timestamp, float[] values);
+
+    @Override
+    public void onAccuracyChanged(Sensor sensor, int accuracy)
+    {
+        accuracyChanged(sensor.getType(), accuracy);
+    }
+
+    @Override
+    public void onSensorChanged(SensorEvent sensorEvent)
+    {
+        if (sensorEvent.sensor.getType() == Sensor.TYPE_ROTATION_VECTOR) {
+            //#### hacky, but much easier than exposing the convert function and converting the arrays back and forth...
+            sensorChanged(sensorEvent.sensor.getType(), sensorEvent.timestamp, convertQuaternionToEuler(sensorEvent.values));
+        } else {
+            sensorChanged(sensorEvent.sensor.getType(), sensorEvent.timestamp, sensorEvent.values);
+        }
+    }
+}