sensormanager

问题 I am trying to make a simple Android application to count steps. When I run the application the else is called in the onResume method meaning it did not find the sensor. I am testing on a 2016 Samsung J3 running Api 22. I am wondering is the problem in my code or is it that the phone does not have the sensor. If it is the phone is there a workaround for it? public class MainActivity extends AppCompatActivity implements SensorEventListener { private TextView counterTextView; private

问题 I'm using a sensor for my Android Application. I register the sensor with a line of code: mySensorManager.registerListener(this, orientationSensor, SensorManager.SENSOR_DELAY_NORMAL); I have introduced a line of code to unregister the listener so it wont be running all time: mySensorManager.unregisterListener(this); So far it works, but i need to register it again when the application resumes. I need to know if my sensorManager has a registered listener so I can registered again or skit it.

问题 I have some problems with SensorManager.unregisterListener. They are similar with Android, Thread, Cannot unregister SensorEventListener and SensorEventListener doesn't get unregistered with unregisterListener() method. But I could not find my answer! I also followed SensorManager documentation example http://developer.android.com/reference/android/hardware/SensorManager.html#SENSOR_DELAY_UI. The problem is that after the Activity is finished I unregister the listener but the sensor keeps

问题 I have been using a Samsung Galaxy S3 to work on an app that uses the barometer estimate the user's altitude. I use SensorManager.getAltitude(p0, p), and set p0 equal to the sea-level pressure reported at the nearest airport. I set p equal to the value returned by the barometer. Unfortunately, the altitude returned is systematically 20 meters or so higher than what it actually is. I'm certain that the barometer is returning pressure values that are too low, so SensorManager.getAltitude is

问题 In my app, I am using the light and proximity sensor to detect phone out of pocket functionality and then unregistering the SensorManager when their detection is complete. But even when the CPU usage by the app shows just 1-2 sec usage, the battery usage always shows my app as no. 1 app in the list which is worrying. I have used the SensorManager.unRegisterListener and also set SensorManager = null, but the situation remains the same. I have read, that due to some bug, the sensors are not

问题 In my app, I am using the light and proximity sensor to detect phone out of pocket functionality and then unregistering the SensorManager when their detection is complete. But even when the CPU usage by the app shows just 1-2 sec usage, the battery usage always shows my app as no. 1 app in the list which is worrying. I have used the SensorManager.unRegisterListener and also set SensorManager = null, but the situation remains the same. I have read, that due to some bug, the sensors are not

问题 I'm writing a game for Android and want to be able to use the accelerometer for input. I see two ways of getting a sensor, one way is to use the first element of SensorManager.getSensorList(Sensor.TYPE_ACCELEROMETER) and the other is SensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER) . The getDefaultSensor doc says it could return a "composite" sensor, so if I want a "raw" sensor I should use getSensorList . Any idea what the difference between a composite or raw sensor is? Does this

问题 On Android, to find out the available system features you can do something like: PackageManager pm = getPackageManager(); for (FeatureInfo fi : pm.getSystemAvailableFeatures()) { String feature_name = fi.name; if(fi.name == null){ feature_name = "GlEs Version " + fi.getGlEsVersion(); } Log.i("theTag", feature_name + ""); } Similarly, to find out the available sensors you can do something like: SensorManager sensorManager = (SensorManager)getSystemService(SENSOR_SERVICE); List<Sensor> sensor

问题 I have an app where I poll the sensors for acceleration data and save the XYZ values to a SQL DB. Codewise it is pretty simple: public void onSensorChanged(SensorEvent event) { sensor = event.sensor; int i = sensor.getType(); if (i == MainActivity.TYPE_ACCELEROMETER) { accelerometerMatrix = event.values; } else if (i == MainActivity.TYPE_GYROSCOPE) { gyroscopeMatrix = event.values; } else if (i == MainActivity.TYPE_GRAVITY) { gravityMatrix = event.values; } else if (i == MainActivity.TYPE

问题 If there any method to change delay of andriod sensor other using constant like "Normal_Delay, ...". I want to put the delay value as I like. if this is possible ? Actually, I found a solution by using "handler" but it doesn't work. Here is the solution with Handler but it doesn't work: public void registerSensorListener() { String sensorName = PackageManager.FEATURE_SENSOR_ACCELEROMETER; if (mHandlerThread == null) { mHandlerThread = new HandlerThread("sensorThread"); } if (!mHandlerThread