Android - Basic Steps (Sensors)

Sensors

There are three types:

Motion
Position
Environment

ServiceManager

Get a reference with

getSystemService(Context.SENSOR_SERVICE)

Get a specific sensor

SensorManager.getDefaultSensor(int type)

Sensor Types

Sensor.TYPE_ACCELEROMETER
Sensor.TYPE_MAGNETIC_FIELD
Sensor.TYPE_PRESSURE

SensorEventListener

Interface for SensorEvent callback
When the accuracy has changed

onAccuracyChanged()

When has a new value

onSensorChanged()

SensorManager

To register or unregister SensorEvents

registerListener()
unregisterListener()

SensorEvents

Include

Data is sensor
Sensor Type
time-stamp
Accuracy
Measurement data

Filters

Low-pass

Deemphasize transient force changes
Emphasize constant force components
Example

Carpenter's level

High-pass

Emphasize transient force changes
Deemphasize constant force components
Example

Percussion instrument

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