I made an app (proximity sensor) but it is getting crashed everytime.Please solve the error and tell me about it

#1

github link:https://github.com/Ketanpandey77/Working-with-Hardware-Sensors-Android-

#2

Use

proximitySensor = sensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY)!!

in the line: 38

if you control click on getDefaultSensor you can check the supported types. they are:

type == Sensor.TYPE_PROXIMITY || type == Sensor.TYPE_SIGNIFICANT_MOTION
                || type == Sensor.TYPE_TILT_DETECTOR || type == Sensor.TYPE_WAKE_GESTURE
                || type == Sensor.TYPE_GLANCE_GESTURE || type == Sensor.TYPE_PICK_UP_GESTURE
                || type == Sensor.TYPE_WRIST_TILT_GESTURE
                || type == Sensor.TYPE_DYNAMIC_SENSOR_META || type == Sensor.TYPE_HINGE_ANGLE
#3

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