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How to check compass in Android

+3 votes
908 views

I have been asked this question in an interview, someone please guide me.

Which of the code is the correct way to check if a Compass sensor is present on the system? Explain your answer.

Answer A:

PackageManager m = getPackageManager();
if (!m.hasSystemFeature(PackageManager.FEATURE_SENSOR_COMPASS)) {
    // This device does not have a compass, turn off the compass feature
}

Answer B:

SensorManager m = getSensorManager();
if (!m.hasSystemFeature(SensorManager.FEATURE_SENSOR_COMPASS)) {
    // This device does not have a compass, turn off the compass feature
}

Answer C:

Sensor s = getSensor();
if (!s.hasSystemFeature(Sensor.FEATURE_SENSOR_COMPASS)) {
    // This device does not have a compass, turn off the compass feature
}
posted May 23, 2016 by Abhijit

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1 Answer

+3 votes
 
Best answer

Answer A. is correct because PackageManager is used for retrieving various kinds of information related to the application packages that are currently installed on the device.

answer May 23, 2016 by Shivam Kumar Pandey
thanks for selecting as best ans @Abhi
commented Jun 14, 2016 by Shivam Kumar Pandey
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