src/Android/InternalSensors.hpp

   1 /*
   2 Copyright_License {
   3
   4   XCSoar Glide Computer - http://www.xcsoar.org/
   5   Copyright (C) 2000-2013 The XCSoar Project
   6   A detailed list of copyright holders can be found in the file "AUTHORS".
   7
   8   This program is free software; you can redistribute it and/or
   9   modify it under the terms of the GNU General Public License
  10   as published by the Free Software Foundation; either version 2
  11   of the License, or (at your option) any later version.
  12
  13   This program is distributed in the hope that it will be useful,
  14   but WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16   GNU General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with this program; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 }
  22 */
  23
  24 #ifndef XCSOAR_ANDROID_INTERNAL_SENSORS_HPP
  25 #define XCSOAR_ANDROID_INTERNAL_SENSORS_HPP
  26
  27 #include "Java/Object.hpp"
  28 #include "Java/Class.hpp"
  29 #include "Compiler.h"
  30
  31 #include <jni.h>
  32 #include <vector>
  33
  34 class Context;
  35
  36 // Consolidated class for handling Java objects that work with Android GPS
  37 // and sensor facilities. Public methods handle activation and deactivation of
  38 // specific sensors.
  39 class InternalSensors {
  40   static Java::TrivialClass gps_cls, sensors_cls;
  41
  42   // IDs for methods in InternalGPS.java.
  43   static jmethodID gps_ctor_id, close_method;
  44
  45   // IDs for methods in NonGPSSensors.java.
  46   static jmethodID sensors_ctor_id;
  47   static jmethodID mid_sensors_getSubscribableSensors;
  48   static jmethodID mid_sensors_subscribeToSensor_;
  49   static jmethodID mid_sensors_cancelSensorSubscription_;
  50   static jmethodID mid_sensors_subscribedToSensor_;
  51   static jmethodID mid_sensors_cancelAllSensorSubscriptions_;
  52
  53 public:
  54   static bool Initialise(JNIEnv *env);
  55   static void Deinitialise(JNIEnv *env);
  56
  57  private:
  58   // Java objects working with the GPS and the other sensors respectively.
  59   Java::Object obj_InternalGPS_;
  60   Java::Object obj_NonGPSSensors_;
  61   std::vector<int> subscribable_sensors_;
  62
  63   InternalSensors(JNIEnv* env, jobject gps_obj, jobject sensors_obj);
  64   void getSubscribableSensors(JNIEnv* env, jobject sensors_obj);
  65  public:
  66   ~InternalSensors();
  67
  68   /* Sensor type identifier constants for use with subscription
  69      methods below.  These must have the same numerical values as
  70      their counterparts in the Android API's Sensor class. */
  71   static constexpr int TYPE_ACCELEROMETER = 0x1;
  72   static constexpr int TYPE_GYROSCOPE = 0x4;
  73   static constexpr int TYPE_MAGNETIC_FIELD = 0x2;
  74   static constexpr int TYPE_PRESSURE = 0x6;
  75
  76   // For information on these methods, see comments around analogous methods
  77   // in NonGPSSensors.java.
  78   const std::vector<int>& getSubscribableSensors() const {
  79     return subscribable_sensors_;
  80   }
  81   bool subscribeToSensor(int id);
  82   bool cancelSensorSubscription(int id);
  83   bool subscribedToSensor(int id) const;
  84   void cancelAllSensorSubscriptions();
  85
  86   gcc_malloc
  87   static InternalSensors *create(JNIEnv* env, Context* native_view,
  88                                unsigned int index);
  89 };
  90
  91 #endif