Kotlin/Native access device sensor in Android specific part

I'm currently stuck on a task that i thought is quite basic. Im developing a library in Kotlin/Native that should query the gravity sensor in iOS and Android.

Almost all the logic is in the common part and just the communication with the devices sensor is implemented in the platform specific methods. Surprisingly all the iOS core libraries (CoreMotion in this case) have been ported so that the implementation was quite easy.

CoreMotion in this case allows me to add a listener on the gravity sensor which is calling a callback whenever the orientation of the screen changes with respect to X, Y or Z (I'm interested in Z btw)

In Android I'd do something like this

private lateinit var sensorManager: SensorManager



fun setupSensor() {



    this.sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



    sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)?.let {

        this.accelerometer = it

    }

    sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY)?.let {

        this.gravity = it

    } 



}

But the imports needed are not available in Kotlin/Native

import android.hardware.Sensor;

import android.hardware.SensorManager;

Is there a way to access this kind of hardware (the gravity sensor) in Kotlin/Native? Or better in the Android specific part of Kotlin/Native?

edited Nov 19 '18 at 14:23

asked Nov 19 '18 at 13:41

Hons

2,31532241

1

Can you ask a more specific question? What sensors are you trying to use, and what are you trying to do with them?

– Gabe Sechan
Nov 19 '18 at 13:57

I'd need the gravity sensor as said above. Specifically I'd need it's Z value which tells if the screen is face up, face down or somewhere in between... I'll update the question

– Hons
Nov 19 '18 at 14:11

add a comment |

I'm currently stuck on a task that i thought is quite basic. Im developing a library in Kotlin/Native that should query the gravity sensor in iOS and Android.

In Android I'd do something like this

private lateinit var sensorManager: SensorManager



fun setupSensor() {



    this.sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



    sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)?.let {

        this.accelerometer = it

    }

    sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY)?.let {

        this.gravity = it

    } 



}

But the imports needed are not available in Kotlin/Native

import android.hardware.Sensor;

import android.hardware.SensorManager;

Is there a way to access this kind of hardware (the gravity sensor) in Kotlin/Native? Or better in the Android specific part of Kotlin/Native?

edited Nov 19 '18 at 14:23

asked Nov 19 '18 at 13:41

Hons

2,31532241

1

Can you ask a more specific question? What sensors are you trying to use, and what are you trying to do with them?

– Gabe Sechan
Nov 19 '18 at 13:57

I'd need the gravity sensor as said above. Specifically I'd need it's Z value which tells if the screen is face up, face down or somewhere in between... I'll update the question

– Hons
Nov 19 '18 at 14:11

add a comment |

I'm currently stuck on a task that i thought is quite basic. Im developing a library in Kotlin/Native that should query the gravity sensor in iOS and Android.

In Android I'd do something like this

private lateinit var sensorManager: SensorManager



fun setupSensor() {



    this.sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



    sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)?.let {

        this.accelerometer = it

    }

    sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY)?.let {

        this.gravity = it

    } 



}

But the imports needed are not available in Kotlin/Native

import android.hardware.Sensor;

import android.hardware.SensorManager;

Is there a way to access this kind of hardware (the gravity sensor) in Kotlin/Native? Or better in the Android specific part of Kotlin/Native?

edited Nov 19 '18 at 14:23

asked Nov 19 '18 at 13:41

Hons

2,31532241

I'm currently stuck on a task that i thought is quite basic. Im developing a library in Kotlin/Native that should query the gravity sensor in iOS and Android.

In Android I'd do something like this

private lateinit var sensorManager: SensorManager



fun setupSensor() {



    this.sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



    sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)?.let {

        this.accelerometer = it

    }

    sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY)?.let {

        this.gravity = it

    } 



}

But the imports needed are not available in Kotlin/Native

import android.hardware.Sensor;

import android.hardware.SensorManager;

Is there a way to access this kind of hardware (the gravity sensor) in Kotlin/Native? Or better in the Android specific part of Kotlin/Native?

android kotlin cross-platform kotlin-native

edited Nov 19 '18 at 14:23

asked Nov 19 '18 at 13:41

Hons

2,31532241

edited Nov 19 '18 at 14:23

asked Nov 19 '18 at 13:41

Hons

2,31532241

edited Nov 19 '18 at 14:23

asked Nov 19 '18 at 13:41

Hons

2,31532241

asked Nov 19 '18 at 13:41

Hons

2,31532241

asked Nov 19 '18 at 13:41

Hons

2,31532241

1

Can you ask a more specific question? What sensors are you trying to use, and what are you trying to do with them?

– Gabe Sechan
Nov 19 '18 at 13:57

I'd need the gravity sensor as said above. Specifically I'd need it's Z value which tells if the screen is face up, face down or somewhere in between... I'll update the question

– Hons
Nov 19 '18 at 14:11

add a comment |

1

Can you ask a more specific question? What sensors are you trying to use, and what are you trying to do with them?

– Gabe Sechan
Nov 19 '18 at 13:57

I'd need the gravity sensor as said above. Specifically I'd need it's Z value which tells if the screen is face up, face down or somewhere in between... I'll update the question

– Hons
Nov 19 '18 at 14:11

Can you ask a more specific question? What sensors are you trying to use, and what are you trying to do with them?

– Gabe Sechan
Nov 19 '18 at 13:57

I'd need the gravity sensor as said above. Specifically I'd need it's Z value which tells if the screen is face up, face down or somewhere in between... I'll update the question

– Hons
Nov 19 '18 at 14:11

add a comment |

2 Answers
2

active

oldest

votes

If you really want it as Kotlin/Native library on Android - it will have direct access to Android NDK, not SDK.

So for sensors it can use functions from
https://android.googlesource.com/platform/frameworks/native/+/jb-dev/include/android/sensor.h

In Kotlin/Native these functions available in package platform.android.*

But if all you want is just make your library available in both iOS and Android - much simpler and common way is compile same sources by Kotlin/Native to iOS and by regular Kotlin to Android, using "kotlin-multiplatform" gradle plugin.

edited Nov 20 '18 at 5:57

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

Thanks that was the right hint! At the end I just had a configuration error in the Android part, so I could not access/import the android specific part... Unfortunately the official guide (kotlinlang.org/docs/tutorials/native/…) is a bit missleading here, but taking the relevant parts from github.com/irgaly/kotlin-multiplatform solved it.

– Hons
Nov 20 '18 at 9:00

add a comment |

I think it would be something like;

 val sensorManager: SensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



            sensorManager.registerListener(object : SensorEventListener {

                override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {

                    //Not needed

                }



                override fun onSensorChanged(event: SensorEvent?) {

                    if (event?.sensor?.type == Sensor.TYPE_GRAVITY) {

                        System.out.println("X: " + event.values[0])

                        System.out.println("Y: " + event.values[1])

                        System.out.println("Z: " + event.values[2])

                    }

                }

            }, sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY), Sensor.TYPE_GRAVITY)

answered Nov 19 '18 at 14:56

Blue Jones

1657

add a comment |

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

If you really want it as Kotlin/Native library on Android - it will have direct access to Android NDK, not SDK.

So for sensors it can use functions from
https://android.googlesource.com/platform/frameworks/native/+/jb-dev/include/android/sensor.h

In Kotlin/Native these functions available in package platform.android.*

edited Nov 20 '18 at 5:57

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

Thanks that was the right hint! At the end I just had a configuration error in the Android part, so I could not access/import the android specific part... Unfortunately the official guide (kotlinlang.org/docs/tutorials/native/…) is a bit missleading here, but taking the relevant parts from github.com/irgaly/kotlin-multiplatform solved it.

– Hons
Nov 20 '18 at 9:00

add a comment |

If you really want it as Kotlin/Native library on Android - it will have direct access to Android NDK, not SDK.

So for sensors it can use functions from
https://android.googlesource.com/platform/frameworks/native/+/jb-dev/include/android/sensor.h

In Kotlin/Native these functions available in package platform.android.*

edited Nov 20 '18 at 5:57

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

Thanks that was the right hint! At the end I just had a configuration error in the Android part, so I could not access/import the android specific part... Unfortunately the official guide (kotlinlang.org/docs/tutorials/native/…) is a bit missleading here, but taking the relevant parts from github.com/irgaly/kotlin-multiplatform solved it.

– Hons
Nov 20 '18 at 9:00

add a comment |

If you really want it as Kotlin/Native library on Android - it will have direct access to Android NDK, not SDK.

So for sensors it can use functions from
https://android.googlesource.com/platform/frameworks/native/+/jb-dev/include/android/sensor.h

In Kotlin/Native these functions available in package platform.android.*

edited Nov 20 '18 at 5:57

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

If you really want it as Kotlin/Native library on Android - it will have direct access to Android NDK, not SDK.

So for sensors it can use functions from
https://android.googlesource.com/platform/frameworks/native/+/jb-dev/include/android/sensor.h

In Kotlin/Native these functions available in package platform.android.*

edited Nov 20 '18 at 5:57

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

edited Nov 20 '18 at 5:57

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

answered Nov 20 '18 at 2:10

Mike Sinkovsky

362

Thanks that was the right hint! At the end I just had a configuration error in the Android part, so I could not access/import the android specific part... Unfortunately the official guide (kotlinlang.org/docs/tutorials/native/…) is a bit missleading here, but taking the relevant parts from github.com/irgaly/kotlin-multiplatform solved it.

– Hons
Nov 20 '18 at 9:00

add a comment |

Thanks that was the right hint! At the end I just had a configuration error in the Android part, so I could not access/import the android specific part... Unfortunately the official guide (kotlinlang.org/docs/tutorials/native/…) is a bit missleading here, but taking the relevant parts from github.com/irgaly/kotlin-multiplatform solved it.

– Hons
Nov 20 '18 at 9:00

Thanks that was the right hint! At the end I just had a configuration error in the Android part, so I could not access/import the android specific part... Unfortunately the official guide (kotlinlang.org/docs/tutorials/native/…) is a bit missleading here, but taking the relevant parts from github.com/irgaly/kotlin-multiplatform solved it.

– Hons
Nov 20 '18 at 9:00

add a comment |

I think it would be something like;

 val sensorManager: SensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



            sensorManager.registerListener(object : SensorEventListener {

                override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {

                    //Not needed

                }



                override fun onSensorChanged(event: SensorEvent?) {

                    if (event?.sensor?.type == Sensor.TYPE_GRAVITY) {

                        System.out.println("X: " + event.values[0])

                        System.out.println("Y: " + event.values[1])

                        System.out.println("Z: " + event.values[2])

                    }

                }

            }, sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY), Sensor.TYPE_GRAVITY)

answered Nov 19 '18 at 14:56

Blue Jones

1657

add a comment |

I think it would be something like;

 val sensorManager: SensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



            sensorManager.registerListener(object : SensorEventListener {

                override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {

                    //Not needed

                }



                override fun onSensorChanged(event: SensorEvent?) {

                    if (event?.sensor?.type == Sensor.TYPE_GRAVITY) {

                        System.out.println("X: " + event.values[0])

                        System.out.println("Y: " + event.values[1])

                        System.out.println("Z: " + event.values[2])

                    }

                }

            }, sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY), Sensor.TYPE_GRAVITY)

answered Nov 19 '18 at 14:56

Blue Jones

1657

add a comment |

I think it would be something like;

 val sensorManager: SensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



            sensorManager.registerListener(object : SensorEventListener {

                override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {

                    //Not needed

                }



                override fun onSensorChanged(event: SensorEvent?) {

                    if (event?.sensor?.type == Sensor.TYPE_GRAVITY) {

                        System.out.println("X: " + event.values[0])

                        System.out.println("Y: " + event.values[1])

                        System.out.println("Z: " + event.values[2])

                    }

                }

            }, sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY), Sensor.TYPE_GRAVITY)

answered Nov 19 '18 at 14:56

Blue Jones

1657

I think it would be something like;

 val sensorManager: SensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager



            sensorManager.registerListener(object : SensorEventListener {

                override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {

                    //Not needed

                }



                override fun onSensorChanged(event: SensorEvent?) {

                    if (event?.sensor?.type == Sensor.TYPE_GRAVITY) {

                        System.out.println("X: " + event.values[0])

                        System.out.println("Y: " + event.values[1])

                        System.out.println("Z: " + event.values[2])

                    }

                }

            }, sensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY), Sensor.TYPE_GRAVITY)

answered Nov 19 '18 at 14:56

Blue Jones

1657

answered Nov 19 '18 at 14:56

Blue Jones

1657

answered Nov 19 '18 at 14:56

Blue Jones

1657

answered Nov 19 '18 at 14:56

Blue Jones

1657

add a comment |

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