Motion sensing camera

MotionSensorMainActivity.kt

package za.co.riggaroo.motionsense

import android.app.Activity
import android.graphics.Bitmap
import android.os.Bundle
import android.os.Handler
import android.util.Log
import android.widget.ImageView
import com.google.android.things.pio.Gpio
import com.google.android.things.pio.GpioCallback
import com.google.android.things.pio.PeripheralManagerService

/**
 * Skeleton of an Android Things activity.
 *
 * Android Things peripheral APIs are accessible through the class
 * PeripheralManagerService. For example, the snippet below will open a GPIO pin and
 * set it to HIGH:
 *
 * <pre>{@code
 * val service = PeripheralManagerService()
 * val mLedGpio = service.openGpio("BCM6")
 * mLedGpio.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW)
 * mLedGpio.value = true
 * }</pre>
 * <p>
 * For more complex peripherals, look for an existing user-space driver, or implement one if none
 * is available.
 *
 * @see <a href="https://github.com/androidthings/contrib-drivers#readme">https://github.com/androidthings/contrib-drivers#readme</a>
 *
 */
class MainActivity : Activity() {

    private val MOTION_SENSOR_PIN = "GPIO_35"
    private var gpioMotionSensor: Gpio? = null

    private var ledGpio: Gpio? = null

    private val LED_GPIO_PIN: String = "GPIO_174"

    private lateinit var camera: CustomCamera

    private lateinit var motionImageView: ImageView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        gpioMotionSensor = PeripheralManagerService().openGpio(MOTION_SENSOR_PIN)
        if (gpioMotionSensor == null) {
            Log.d("MainActivity", "motion sensor is null")
        }
        gpioMotionSensor?.setDirection(Gpio.DIRECTION_IN)
        gpioMotionSensor?.setActiveType(Gpio.ACTIVE_HIGH)
        gpioMotionSensor?.setEdgeTriggerType(Gpio.EDGE_BOTH)
        gpioMotionSensor?.registerGpioCallback(object : GpioCallback() {
            override fun onGpioEdge(gpio: Gpio): Boolean {
                if (gpio.value) {
                    ledGpio?.value = true
                    camera.takePicture()
                    Log.d("MainActivity", "onGpioEdge: motion detected ")
                } else {
                    ledGpio?.value = false
                    Log.d("MainActivity", "onGpioEdge: NO MOTION detected ")
                }
                return true
            }
        })

        ledGpio = PeripheralManagerService().openGpio(LED_GPIO_PIN)
        ledGpio?.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW)
        ledGpio?.value = true

        motionImageView = findViewById(R.id.image_view_motion_photo)

        setupCamera()

    }

    private fun setupCamera() {
        camera = CustomCamera.getInstance()
        camera.initializeCamera(this, Handler(), imageAvailableListener)
    }

    private val imageAvailableListener = object : CustomCamera.ImageCapturedListener {
        override fun onImageCaptured(bitmap: Bitmap) {
            motionImageView.setImageBitmap(bitmap)
        }
    }


    override fun onDestroy() {
        super.onDestroy()
        gpioMotionSensor?.close()
        ledGpio?.close()
    }
}