Questions:
How can I detect whether the android device has gyroscope? Currently I’m using the following method to detect whether gyroscope is available. If gyroscope not available, then use accelerometer.
SensorManager mgr = (SensorManager) getSystemService(SENSOR_SERVICE);
List<Sensor> sensors = mgr.getSensorList(Sensor.TYPE_ALL);
for (Sensor sensor : sensors) {
Log.i("sensors",sensor.getName());
if(sensor.getName().contains("Gyroscope")){
try{
mSensorManager.registerListener(this,
mSensorManager.getDefaultSensor(Sensor.TYPE_ROTATION_VECTOR),
SensorManager.SENSOR_DELAY_FASTEST);
return;
}catch(Exception e){
}
}
}
mSensorManager.registerListener(this,
mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
SensorManager.SENSOR_DELAY_FASTEST);
However some of my app users complaint they can’t use gyroscope. Is there any problem with the code?
How to&Answers:
You can simply use the Package Manager’s System features to check if the device has a gyroscope in it:
PackageManager packageManager = getPackageManager();
boolean gyroExists = packageManager.hasSystemFeature(PackageManager.FEATURE_SENSOR_GYROSCOPE);
Your current code may not work on some devices as the sensor name is not guaranteed to contain Gyroscope in it.
Answer：
Use this:
mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
if(mSensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE) != null)
{
// Sensor FOUND
}
else
{
//Sensor NOT FOUND
}
Answer：
You should use
sensor.getType() == Sensor.TYPE_GYROSCOPE
in place of your current sensor.getName().contains("Gyroscope") to determine if the sensor is a Gyroscope.
Answer：
This is my method:
public static boolean existGyroscope(Context ctx){
SensorManager mSensorManager = (SensorManager) ctx.getSystemService(Context.SENSOR_SERVICE);
if(mSensorManager.getDefaultSensor(Sensor.TYPE_GYROSCOPE) != null){
return true;
}else{
return false;
}
}
used in all my apps.
Tags: androidandroid
