214 questions
0
votes
0
answers
15
views
Calculate angle in device when the device is held vertically
I want to calculate the angle between 0 to 45 degree when the device is held vertically (i.e., against a wall, with the bottom edge flat on a table).When tilt to right side it will captures the angle....
0
votes
0
answers
50
views
Read Data from external Sensors
I would like to create an android app which monitors the room temperature.
Is it possible to connect a temperature sensor with cable (I do not want to be dependent on Wi-Fi and if possible not on ...
- 1
0
votes
0
answers
33
views
There is a way to know if other application is using a sensor [Android]
I´m working in a POC in Android and I need to know if another application is using a sensor (moreover if it is starting or shutting down a sensor).
Do you know if SensorManager does that?
Perhaps ...
- 179
0
votes
0
answers
58
views
How to measure radiation(Non Ionizing) [Android SDK] for a Radiation measuring application
I need a way to measure the non-ionizing radiation around me through the smart phones. I have found several applications on the google Play Store which have an RF meter functionality which measures ...
- 50
0
votes
0
answers
130
views
I can't get the ambient temperature on my phone
I am building an app which shoud display all the values from all the sensors including the TYPE_AMBIENT_TEMPERATURE sensor. I am using the SensorManager class.
I have written the code and tested it on ...
0
votes
2
answers
330
views
watchOS 10 CMBatchedSensorManager, crashes on startDeviceMotionUpdates / startAccelerometerUpdates
I've been waiting to try these APIs. I had already tried them on Beta with no luck and thought on release I would be able to use them. Today I tried with xCode 15 and any calls to start something from ...
- 977
0
votes
1
answer
59
views
Memory leak in SensorManager implementation in parent class
I have handled screen orientation using SensorManager and it's working fine
But there is some memory leak as it is set in BaseActivity like
abstract class BaseActivity : AppCompatActivity(), ...
- 639
1
vote
1
answer
391
views
How to apply calibration to accelerometer in android?
I am using rotation vector sensor to calculate the orientation of my device. There seems to be an error in the output of rotation vector sensor due to some offset in accelerometer data. I am able to ...
- 71
0
votes
1
answer
252
views
sensor TYPE_STEP_DETECTOR is not working when screen is off
in my app i use the TYPE_STEP_DETECTOR. I want to detect steps when screen is off. But the sensor TYPE_STEP_DETECTOR does not work when the screen is off. So I use PowerManager/WakeLock to make the ...
- 131
0
votes
0
answers
114
views
Unresolved reference: getSensorList in SensorManager.getSensorList
I am writing a simple code to find out all available sensors in an Android System.
I don't know why I am getting this error. Neither Android docs have mentioned any exception as such that may occur ...
- 170
0
votes
1
answer
678
views
How to output temperature using Android Studio
I am trying to develop a simple app that outputs the temperature using a SensorManager to read and set the value from the temperature sensor. But whenever I run the code, nothing outputs, and I get a ...
0
votes
1
answer
744
views
Step Counter in Android Studio doesn't count steps
I have a problem with an app I'm trying to develop in Android Studio. I'm trying to develop a step counter using the STEP_COUNTER sensor in a Fragment.I decided to show my results in a TextView ('...
- 1
0
votes
0
answers
39
views
Is it possible to send data to light sensor in android?
I am working with sensors in my application in which I got stuck on a question is there any way to send data through the light sensor or to the light sensor in android programmatically?
Any help will ...
- 1,222
0
votes
0
answers
226
views
Background Service implementing SeneorEventListener only fires once; used to work well a few years ago
I'm resurrecting an old app I wrote that wakes up once every minute and logs my phone's orientation.
The issue I'm observing now, which is different from when the code was written circa 2015, is that ...
- 318
1
vote
0
answers
114
views
TYPE_STEP_COUNTER sensor not found on a real device(Android Studio)
Hello I`m doing step counter.
In manifest I added the permission
<uses-permission android:name="android.permission.ACTIVITY_RECOGNITION"/>
I also added a check in the onCreate method:
...
- 23
0
votes
0
answers
122
views
Android: Sensor delay in SensorEventListener is working differently for different devices(from different manufacturers)
In Oppo mobile phone gyroscope is giving twice the accelerometer data(no of data per time period). In oneplus it is giving 5 times and in MI phone it perfectly giving the same no of data for both ...
0
votes
1
answer
139
views
How to read only once from Android build in Accelerometer per second?
With help of sensorManager I am reading accelerometer reading. Currently slowest setting ie SENSOR_DELEY_NORMAL ,accelerometer reads around 10 times every second. Is there any way by which it can ...
- 614
0
votes
1
answer
624
views
Starting a service that records sensor data in Kotlin Android App
I'm creating an android app which uses a telematics SDK to start recording driving activity when the SDK picks up that the user is driving. The SDK runs in the background, and has full access to ...
- 353
-2
votes
1
answer
1k
views
Java - Android - Pedometer Doesn't count steps when the app is running in the background
My problem is that my pedometer only counts the steps when I have the app open.
As soon as I leave the app, it stops counting.
The goal of the Android app is that the steps are counted as long as the ...
- 1
6
votes
1
answer
2k
views
Flutter: how can I permanently register a sensor (and never unregister it?)
TL;DR how can I have an Android sensor permanently running/active/registered for my app, even if I close it?
Objective:
I'm making a Flutter application that counts your steps using the pedometer ...
- 970
1
vote
0
answers
148
views
React Native Error: react-native-sensor-manager:compileDebugJavaWithJavac FAILED
I'm trying to use the react-native-sensor-manager in order to get the user steps and count that. But the problem is after I installed this package and did all the configuration as in the documentation....
- 367
0
votes
1
answer
150
views
How raw is iOS accelerometry data retrieved through `CMMotionManager`?
Accelerometry data including gravity can be retrieved both on Android and iOS phones:
On iOS raw accelerometry data can be retrieved through CMMotionManager.
On Android two different types of data ...
- 19.1k
2
votes
0
answers
1k
views
Android/Kotlin: onKeyDown function is not working and fired
I wanted to calculate the screen touch time.
I used the "onKeyUp" function when my finger was not on the screen and "isKeyPressed" returned false.I used the "onKeyDown" ...
- 33
0
votes
1
answer
241
views
Android- Kotlin: how can i measure and detect covered area by a finger touch on screen
I want to know how much area my finger covers when I touch the phone screen.
I used many sensors for some events. I compile my code with Android Studio. They asked this question 11 years ago but the ...
- 33
0
votes
0
answers
39
views
Detecting complicated motions on the basis of sensory data
I am pretty new in android sensory stuff such as accelerometer, gravity or gyroscope sensors and I hope that maybe here is someone who wants to/can help.
Lets say I am trying to detect if a user is ...
- 1
-1
votes
2
answers
1k
views
How to read Android Sensor data only once, when asked for
I'm trying to read the accelerometer and/or geomagnetic sensor in a Java android app to determine the device orientation at one point. But the sensor itself doesn't matter, and my question could be ...
- 659
3
votes
0
answers
949
views
How to detect type of proximity sensor - Infrared or not?
I have an app which relies on using an Infrared based proximity sensor. Since the Note 10, Samsung have been using virtual proximity sensors - that is, they don't use Infrared, but instead rely on a ...
- 764
1
vote
1
answer
629
views
TYPE_STEP_COUNTER sensor not found in NEXUS5X 29API
I am doing a step counter project in an android studio with Nexus5X API29. I need to use sensors for this. I wrote the sensor codes as below, but it still gives 'Sensor not found' error. Is there any ...
- 13
0
votes
1
answer
565
views
STEP_COUNTER and STEP_DETECTOR works with SDK 28, but not SDK 29?
I've made a service that regularly broadcasts counted steps from both the STEP_COUNTER and STEP_DETECTOR sensor. In one app I made it worked flawlessly, but after copying the exact same code to ...
- 96
0
votes
1
answer
744
views
Cannot resolve method 'registerListener(com.xxx.xxx.MainActivity, android.hardware.SensorManager, int)'
couldn't find a good answer to that problem.
@Override
protected void onResume() {
super.onResume();
mSensorManager.registerListener(MainActivity.this, mSensorManager, SensorManager....
0
votes
2
answers
380
views
Simple stepCounter doesn't work on different phones
I made simple stepCounter based on step counter sensor. I know that not everyone phone have this kind of sensor, so I've secured my code by Toast message in onResume.Both devices showing Toast Message ...
- 102
0
votes
1
answer
477
views
Detect if user is indoor or outdoor using mobile sensors
I am trying to detect whether user is indoor or outdoor using Acceleromter, magnetic field and light sensor. I am using the following method:
Registering the Sensor Manager
@Override
protected ...
- 2,790
0
votes
0
answers
67
views
OnSensorChane not being called in some devices
I have tried integrating pedometer.
I have came across one issue that onSensorChanges is not being called in specifically ONEPLUS 8
Can any one help ?
I am registering listener as below
sensorManager....
- 1,907
3
votes
0
answers
862
views
SensorManager.registerListener - samplingPeriodUs being ignored
Disclaimer: There are many examples of this issue on SO. None of them answer my question.
I am trying to make my sensor onSensorChanged event fire every X secods.
Here is my code:
static long delay1 = ...
- 4,114
3
votes
1
answer
2k
views
Why doesn't my SensorEventListener implementation work? Not receiving onSensorChanged callbacks
I'm trying to make an app to display phones roation in degrees, but onSensorChanged is not getting called. The text in the textView isn't changing and I don't know why. It doesn't give any compile ...
- 33
2
votes
0
answers
429
views
Android steps counter sensor is updated only if application is in focus on some devices
I'm developing steps counter application on Android.
To get the steps the application is listening to onSensorChanged(..) event of Sensor.TYPE_STEP_COUNTER sensor.
The problem is that on some devices ...
- 21
2
votes
1
answer
1k
views
Android SensorManager vs Google Fit for step count
I've been researching how to read step count in my Android app, and found two completely different ways to do it in the documentation:
Using SensorManager:
val sensorManager = getSystemService(...
- 7,101
0
votes
2
answers
375
views
Converting a class to a service
I have implemented a step counting class that seems to work ok, however I am instantiating it from the main activity and everytime the main activity is loaded another instance of the class is created ...
- 3,416
0
votes
2
answers
127
views
rephrase definition for android orientation angle "roll"
The definition of 'roll' in android is:
angle between a plane perpendicular to the device's screen and a plane perpendicular to the ground
See here.
Maybe I'm missing something, but there seem ...
1
vote
2
answers
669
views
How to collect data from multiple mobile sensors at once in Java?
I want to collect data from the accelerometer, gyroscope and magnetometer all at once. I am currently using the SensorManager service which is based on the SensorEvent. The problem with this is that I ...
- 1,170
1
vote
1
answer
1k
views
How can I access the heart rate sensor of my Huawei Watch 2 if it is not an original Huawei Sensor?
I bought a Huawei Watch 2 because I'm working on an app that reads steps and heart rate.
Before opting for the Google Fitness API, I wanted to try accessing raw data directly from the watch sensors.
...
- 13
2
votes
0
answers
165
views
What's the real range of pitch and roll return by SensorManager.getOrientation?
The android doc says:
But I test on my android device, the range of pitch is -π/2 to π/2, the range of roll is -π to π.
And then I check the source code of SensorManager.getOrientation, I find the ...
- 1,591
1
vote
2
answers
2k
views
Null pointer exception when calling getSystemService on Service class
In my main activity I start a service. In that service, I try to get the sensor manager but I get the following exception
Attempt to invoke virtual method 'java.lang.Object android.content....
- 468
1
vote
0
answers
1k
views
How to calculate time calories burnt while counting steps using STEP_COUNT_SENSOR
I am new to android and working on an application like pedometer. I have calculated total steps using Step Count Sensor , Now I want to calculate total time and calories burnt. Step count sensor ...
1
vote
1
answer
445
views
How to convert the magnetic field vector from sensor coordinate space to camera coordinate space?
I would like to collect the magnetic field vector (i.e. x,y,z in microteslas) from the TYPE_MAGNETIC_FIELD Position sensor and put it in the same coordinate system that the Frame's we get from ARCore ...
- 61
-2
votes
1
answer
248
views
Displaying multiple sensors readings on screen
I am trying to display multiple sensor readings on screen (accelerometer, magnetometer, etc.) in its own line of text. I can change the text onscreen for one type of sensor (accelerometer), but not ...
- 177
1
vote
0
answers
416
views
Failed to obtain magnetic field sensor on Pixel 2 despite it exists on sensor list
I tried to get magnetic field sensor with the following code, permission for fine location access has obtained:
sensorManager = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
...
- 61
1
vote
2
answers
2k
views
Where to poll sensor data in ViewModel environment?
I like to get sensor data (eg. gyroscope) from a fragment using mvvm. So far I got it working but only in a fragment, completely working around the mvvm environment. It doesn't work from the viewmodel ...
- 853
1
vote
0
answers
407
views
Why roll is unpredictable when pitch is close to 90 degrees?
While playing with Sensor Manager, I noticed that sensor data has some limitations that I cannot understand.
By listening for sensor events, we can extract azimuth, pitch and roll values. Here is ...
- 4,830
1
vote
2
answers
704
views
SensorManager requestTriggerSensor returning false
I am making a fitness app that uses step count to measure distance. I am trying to use the sensorManager.requestTriggerSensor() method to get the initial step count when the app is started. However, ...
- 73