GDG DevFest Kansas city - Connect your Phone and Home with Firebase and Android Things

Slides of the presentation about Android Things and Firebase done at the GDG DevFest Kansas City

Transcript

1. James Coggan Connect your Phone and Home 
 with 
 Firebase and Android Things https://jamescoggan.com @mad_team
2. What is Android Things?
3. What is Android Things?
12. Android vs Android Things ! Main app started automatically ! Android Things support Library ! Permissions are free (reboot required for dangerous ones) ! Google play services: ◦ Firebase ▪ Realtime database ▪ Cloud messaging ▪ Etc ◦ Google cloud platform ◦ Google cloud IoT ◦ ...
13. Android vs Android Things ! AdMob ! Android Pay ! Full screen display (no status bar, notifications or navigation buttons) ! Sign-In ! System apps (Calendar, Telephony, Settings..) ! Display is optional
14. Development kits NXP Pico i.MX7D Raspberry pi kit
15. Development kits Carrier board SoM
16. Development kits
17. CES 2018 iHome iGV1 Lenovo LG
18. Why Android Things? ! Kotlin :) ! OS and Framework Maintained by Google ! OTA updates ! Android community ! Android libraries ! Reusable code/infrastructure
19. Getting started https://partner.android.com/things/console/u/0/#/tools
20. Getting started https://partner.android.com/things/console/u/0/#/
21. Getting started
22. Getting started
23. Why Android Things? A bundle is a zip file that contains the following: ! bootanimation.zip: Boot animation located in the root directory ! <user-space driver>.apk:User-space driver as a service (action=BOOT_COMPLETED) ! <main>.apk: (Required) The apk for the main entry point (action=MAIN, category=IOT_LAUNCHER) ! <sub>.apk:One of any number of apks that is launched by the main apk
24. Getting started
25. Update policy ! POLICY_CHECKS_ONLY - Only check for an available update. ! POLICY_APPLY_ONLY - Download and apply an available update. ! POLICY_APPLY_AND_REBOOT - Download and apply an available update. Reboot the device automatically. This is the default policy.
26. Getting started
28. Getting started dependencies { compileOnly "com.google.android.things:androidthings:+" ... }
29. <!-— Things manifest file —-> … <application android:name=".ThingsApplication"> <uses-library android:name="com.google.android.things" /> … </application> Getting started
30. Getting started <!—- Things manifest file —-> <activity android:name=".MainActivity"> <intent-filter>
 <!-- Launch activity as default from Android Studio --> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity>
31. Getting started <activity android:name=".MainActivity"> <intent-filter>
 <!-- Launch activity as default from Android Studio --> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <intent-filter> <!-- Launch activity automatically on boot --> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.IOT_LAUNCHER" /> <category android:name="android.intent.category.DEFAULT" /> </intent-filter> </activity>
32. But now what?
33. Supported I/Os ! General Purpose Input/Output (GPIO): Binary ! Pulse Width Modulation (PWM): Servo motors, DC motors ! Inter-Integrated Circuit(I2C) ! Serial Peripheral Interface (SPI) ! Universal Asynchronous Receiver Transmitter (UART)
34. Raspberry Pi NXP MX7D
36. val gpioForLED = "BCM6"
37. val gpioForLED: String // Pin 31 get() { return when (Build.DEVICE) { DEVICE_RPI3 -> "BCM6" } }
38. val gpioForLED: String // Pin 31 get() { return when (Build.DEVICE) { DEVICE_RPI3 -> "BCM6" DEVICE_IMX6UL_PICO -> "GPIO4_IO22" DEVICE_IMX7D_PICO -> "GPIO2_IO02" } }
39. val gpioForLED: String // Pin 31 get() { return when (Build.DEVICE) { DEVICE_RPI3 -> "BCM6" DEVICE_IMX6UL_PICO -> "GPIO4_IO22" DEVICE_IMX7D_PICO -> "GPIO2_IO02" else -> throw IllegalStateException("Unknown Build.DEVICE " + Build.DEVICE) } }
40. val gpioForButton: String // Pin 40
41. val gpioForButton: String // Pin 40 get() { return when (Build.DEVICE) { DEVICE_RPI3 -> "BCM21" DEVICE_IMX6UL_PICO -> "GPIO2_IO03" DEVICE_IMX7D_PICO -> "GPIO6_IO14" else -> throw IllegalStateException("Unknown Build.DEVICE " + Build.DEVICE) } }
42. val pioService = PeripheralManagerService()
43. val pioService = PeripheralManagerService() ledGpio = pioService.openGpio(gpioForLED)
44. val pioService = PeripheralManagerService() ledGpio = pioService.openGpio(gpioForLED) ledGpio?.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW)

45. val pioService = PeripheralManagerService() ledGpio = pioService.openGpio(gpioForLED) ledGpio?.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW)
 ledGpio?.setActiveType(Gpio.ACTIVE_HIGH)
46. val pioService = PeripheralManagerService() ledGpio = pioService.openGpio(gpioForLED) ledGpio?.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW)
 ledGpio?.setActiveType(Gpio.ACTIVE_HIGH) ledGpio?.value = false
47. val pioService = PeripheralManagerService() ledGpio = pioService.openGpio(gpioForLED) ledGpio?.setDirection(Gpio.DIRECTION_OUT_INITIALLY_LOW)
 ledGpio?.setActiveType(Gpio.ACTIVE_HIGH) ledGpio?.value = true
48. buttonGpio = service.openGpio(gpioForButton)
49. buttonGpio = service.openGpio(gpioForButton) buttonGpio?.setDirection(Gpio.DIRECTION_IN)
50. buttonGpio = service.openGpio(gpioForButton) buttonGpio?.setDirection(Gpio.DIRECTION_IN) buttonGpio?.setEdgeTriggerType(Gpio.EDGE_BOTH)
51. buttonGpio = service.openGpio(gpioForButton) buttonGpio?.setDirection(Gpio.DIRECTION_IN) buttonGpio?.setEdgeTriggerType(Gpio.EDGE_BOTH) buttonGpio?.registerGpioCallback()
52. buttonGpio = service.openGpio(gpioForButton) buttonGpio?.setDirection(Gpio.DIRECTION_IN) buttonGpio?.setEdgeTriggerType(Gpio.EDGE_BOTH) buttonGpio?.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio?): Boolean { return true } }
53. buttonGpio = service.openGpio(gpioForButton) buttonGpio?.setDirection(Gpio.DIRECTION_IN) buttonGpio?.setEdgeTriggerType(Gpio.EDGE_BOTH) buttonGpio?.registerGpioCallback(object : GpioCallback() { override fun onGpioEdge(gpio: Gpio?): Boolean { setLed(gpio?.value ?: false) return true } }
54. ledGpio?.close() buttonGpio?.close()
57. @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); 
 PeripheralManagerService service = new PeripheralManagerService(); try { bus = service.openI2cDevice(I2C_ADDRESS, BMP280_TEMPERATURE_SENSOR_SLAVE); calibrationData[0] = bus.readRegWord(REGISTER_TEMPERATURE_CALIBRATION_1); calibrationData[1] = bus.readRegWord(REGISTER_TEMPERATURE_CALIBRATION_2); calibrationData[2] = bus.readRegWord(REGISTER_TEMPERATURE_CALIBRATION_3); …. private static int readSample(byte[] data) { // msb[7:0] lsb[7:0] xlsb[7:4] int msb = data[0] & 0xff; int lsb = data[1] & 0xff; int xlsb = data[2] & 0xf0; // Convert to 20bit integer return (msb << 16 | lsb << 8 | xlsb) >> 4; } } https://github.com/blundell/androidthings-i2c-input
59. dependencies { ... implementation "com.google.android.things.contrib:driver- rainbowhat:0.8" … }
60. val ledGpio = RainbowHat.openLedGreen() ledGpio?.value = true
61. sensor = RainbowHat.openSensor()
62. sensor = RainbowHat.openSensor() sensor?.setTemperatureOversampling(Bmx280.OVERSAMPLING_1X) sensor?.setPressureOversampling(Bmx280.OVERSAMPLING_1X)
63. sensor = RainbowHat.openSensor() sensor?.setTemperatureOversampling(Bmx280.OVERSAMPLING_1X) sensor?.setPressureOversampling(Bmx280.OVERSAMPLING_1X) val temperature = sensor?.readTemperature() ?: 0f
64. sensor = RainbowHat.openSensor() sensor?.setTemperatureOversampling(Bmx280.OVERSAMPLING_1X) sensor?.setPressureOversampling(Bmx280.OVERSAMPLING_1X) val temperature = sensor?.readTemperature() ?: 0f val pressure = sensor?.readPressure() ?: 0f
65. data class TemperatureAndPressure( val temperature: Float, val pressure: Float)
66. sensor = RainbowHat.openSensor() sensor?.setTemperatureOversampling(Bmx280.OVERSAMPLING_1X) sensor?.setPressureOversampling(Bmx280.OVERSAMPLING_1X) val temperature = sensor?.readTemperature() ?: 0f val pressure = sensor?.readPressure() ?: 0f val value = TemperatureAndPressure(temperature, pressure) saveTemperatureAndPressure(value)
67. interface Actuator<in T> { fun start() fun stop() fun setState(state: T) }
68. interface Sensor<out T> { fun start(onStateChangeListener: OnStateChangeListener<T>) fun stop() interface OnStateChangeListener<in T> { fun onStateChanged(state: T) } }
72. Setting up Firebase https://console.firebase.google.com • Create a new Firebase project
73. Setting up Firebase https://console.firebase.google.com • Create a new Firebase project • Add a new Android app to the project with your package name • Enable anonymous login on (temporarily) 

74. Setting up Firebase https://console.firebase.google.com • Create a new Firebase project • Add a new Android app to the project with your package name • Enable anonymous login on (temporarily) 

75. • Setup a database 
 // Database
 { "home" : { "light" : false, "pressure" : 0, "temperature" : 0 } }
76. data class HomeInformation( var light: Boolean = false, var pressure: Float = 0f, var temperature: Float = 0f)
77. // Base build.gradle for all modules
 buildscript {
 ...
 dependencies {
 classpath "com.google.gms:google-services:$playServices"
 }
 }
78. // mobile & things build.gradle
 dependencies {
 ...
 implementation "com.google.firebase:firebase-core:$playServices"
 implementation "com.google.firebase:firebase-database:$playServices"
 implementation "com.google.firebase:firebase-auth:$playServices"
 implementation "android.arch.lifecycle:extensions$archComponentsVersion"
 }
 
 apply plugin: "com.google.gms.google-services"
79. // MainActivity.kt (Both modules - mobile and things)
 companion object { private val HOME = "home" }
80. // MainActivity.kt (Both modules - mobile and things)
 companion object { private val HOME = "home" } override fun onCreate(savedInstanceState: Bundle?) { }
81. // MainActivity.kt (Both modules - mobile and things)
 companion object { private val HOME = "home" } override fun onCreate(savedInstanceState: Bundle?) { val firebaseAuth = FirebaseAuth.getInstance() }
82. // MainActivity.kt (Both modules - mobile and things)
 companion object { private val HOME = "home" } override fun onCreate(savedInstanceState: Bundle?) { val firebaseAuth = FirebaseAuth.getInstance() val reference = FirebaseDatabase .getInstance() .reference .child(HOME) }
83. Saving the data
84. <!— Mobile Activity Layout --> <ToggleButton android:id="@+id/lightToggle" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
85. // Mobile Activity companion object { val LIGHT = "light" }
86. // Mobile Activity companion object { val LIGHT = "light" } override fun onCreate(savedInstanceState: Bundle?) { ... }
87. // Mobile Activity companion object { val LIGHT = "light" } override fun onCreate(savedInstanceState: Bundle?) { ... lightToggle.setOnCheckedChangeListener({ _, state: Boolean -> }) }
88. // Mobile Activity companion object { val LIGHT = "light" } override fun onCreate(savedInstanceState: Bundle?) { ... lightToggle.setOnCheckedChangeListener({ _, state: Boolean -> databaseReference.child(LIGHT).setValue(state) }) }
89. // Things Activity private val sensor = HatTemperatureAndPressureSensor()
90. // Things Activity private val sensor = HatTemperatureAndPressureSensor() sensor.start(temperatureAndPressureChangedListener)
91. // Things Activity companion object { val PRESSURE = "pressure" val TEMPERATURE = "temperature" }
92. // Things Activity companion object { val PRESSURE = "pressure" val TEMPERATURE = "temperature" } private val temperatureAndPressureListener = object : Sensor.OnStateChangeListener<TemperatureAndPressure> { }
93. // Things Activity companion object { val PRESSURE = "pressure" val TEMPERATURE = "temperature" } private val temperatureAndPressureListener = object : Sensor.OnStateChangeListener<TemperatureAndPressure> { override fun onStateChanged(state: TemperatureAndPressure) { } }
94. // Things Activity companion object { val PRESSURE = "pressure" val TEMPERATURE = "temperature" } private val temperatureAndPressureListener = object : Sensor.OnStateChangeListener<TemperatureAndPressure> { override fun onStateChanged(state: TemperatureAndPressure) { reference.child(TEMPERATURE).setValue(state.temperature) reference.child(PRESSURE).setValue(state.pressure) } }
95. Observe data changes
96. class HomeInformationLiveData() { }
97. class HomeInformationLiveData() : LiveData<HomeInformation>() { }
98. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { }
99. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { private val valueEventListener = object : ValueEventListener { } }
100. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { private val valueEventListener = object : ValueEventListener { override fun onDataChange(snapshot: DataSnapshot) { } } }
101. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { private val valueEventListener = object : ValueEventListener { override fun onDataChange(snapshot: DataSnapshot) { val newValue = snapshot.getValue(HomeInformation::class.java) value = newValue } } }
102. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { private val valueEventListener = object : ValueEventListener { override fun onDataChange(snapshot: DataSnapshot) { val newValue = snapshot.getValue(HomeInformation::class.java) value = newValue } override fun onCancelled(error: DatabaseError) { Timber.w(error.toException(), "onCancelled") } } }
103. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { … override fun onActive() { } override fun onInactive() { } }
104. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { … override fun onActive() { dbReference.addValueEventListener(valueEventListener) } override fun onInactive() { } }
105. class HomeInformationLiveData (val dbReference : DatabaseReference) : LiveData<HomeInformation>() { … override fun onActive() { dbReference.addValueEventListener(valueEventListener) } override fun onInactive() { dbReference.removeEventListener(valueEventListener) } }
106. // Things Activity private val lightsDataObserver = Observer<HomeInformation> { }
107. // Things Activity private val lightsDataObserver = Observer<HomeInformation> { homeInformation -> setLed(homeInformation?.light ?: false) }
108. <TextView android:id="@+id/temperatureText" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <TextView android:id="@+id/pressureText" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
109. // Mobile Activity private val lightsDataObserver = Observer<HomeInformation> { }
110. // Mobile Activity private val lightsDataObserver = Observer<HomeInformation> { homeInformation -> pressureText.text =homeInformation?.pressure ?: 0f temperatureText.text = homeInformation?.temperature ?: 0f) }
111. companion object { val HOME = "home" }
112. companion object { val HOME = "home" } private val reference = FirebaseDatabase.getInstance().reference.child(HOME)
113. companion object { val HOME = "home" } private val reference = FirebaseDatabase.getInstance().reference.child(HOME) private val homeLiveData = HomeInformationLiveData(reference)
114. // Mobile and Things Activity override fun onCreate(savedInstanceState: Bundle?) { }
115. // Mobile and Things Activity override fun onCreate(savedInstanceState: Bundle?) { firebaseAuth.signInAnonymously() .addOnCompleteListener { } }
116. // Mobile and Things Activity override fun onCreate(savedInstanceState: Bundle?) { firebaseAuth.signInAnonymously() .addOnCompleteListener { task -> if (task.isSuccessful) { homeLiveData.observe(this, lightsDataObserver) } }
 }
117. // Mobile and Things Activity override fun onStop() { super.onStop() }
118. // Mobile and Things Activity override fun onStop() { super.onStop() lightsLiveData.removeObserver { lightsDataObserver } }
122. Nearby ! Pub/Sub ! Send messages, files or stream data ! No need for server ! Peer to peer ! Wifi or BLE
124. // Android Things and Mobile val googleApiClient = GoogleApiClient.Builder(this) .build()
125. // Android Things and Mobile val googleApiClient = GoogleApiClient.Builder(this) .addApi(Nearby.CONNECTIONS_API) .build()
126. // Android Things and Mobile val googleApiClient = GoogleApiClient.Builder(this) .addApi(Nearby.CONNECTIONS_API) .addConnectionCallbacks() .build()
127. // Android Things and Mobile val googleApiClient = GoogleApiClient.Builder(this) .addApi(Nearby.CONNECTIONS_API) .addConnectionCallbacks(object : GoogleApiClient.ConnectionCallbacks { ) .build()
128. // Android Things and Mobile val googleApiClient = GoogleApiClient.Builder(this) .addApi(Nearby.CONNECTIONS_API) .addConnectionCallbacks(object : GoogleApiClient.ConnectionCallbacks { override fun onConnected(connectionHint: Bundle?) { } }) .build()
129. // Android Things and Mobile val googleApiClient = GoogleApiClient.Builder(this) .addApi(Nearby.CONNECTIONS_API) .addConnectionCallbacks(object : GoogleApiClient.ConnectionCallbacks { override fun onConnected(connectionHint: Bundle?) { startListening() } }) .build()
130. // Android Things and Mobile val googleApiClient = GoogleApiClient.Builder(this) .addApi(Nearby.CONNECTIONS_API) .addConnectionCallbacks(object : GoogleApiClient.ConnectionCallbacks { override fun onConnected(connectionHint: Bundle?) { startService() } override fun onConnectionSuspended(cause: Int) { Timber.e(“Failed”): } }) .build()
131. Mobile
132. // Mobile private fun startService() { }
133. // Mobile private fun startService() { Nearby.Connections.startDiscovery() }
134. // Mobile private fun startService() { Nearby.Connections.startDiscovery( googleApiClient, }
135. // Mobile private fun startService() { Nearby.Connections.startDiscovery( googleApiClient, SERVICE_ID, }
136. // Mobile private fun startService() { Nearby.Connections.startDiscovery( googleApiClient, SERVICE_ID, endpointDiscoveryCallback }
137. // Mobile private fun startService() { Nearby.Connections.startDiscovery( googleApiClient, SERVICE_ID, endpointDiscoveryCallback, DiscoveryOptions(Strategy.P2P_STAR)) }
138. // Mobile private fun startService() { Nearby.Connections.startDiscovery( googleApiClient, SERVICE_ID, endpointDiscoveryCallback, DiscoveryOptions(Strategy.P2P_STAR)) .setResultCallback { } }
139. // Mobile private fun startService() { Nearby.Connections.startDiscovery( googleApiClient, SERVICE_ID, endpointDiscoveryCallback, DiscoveryOptions(Strategy.P2P_STAR)) .setResultCallback { result -> when { result.status.isSuccess -> Timber.d("SUCCESS") else -> { Timber.w("FAILURE ${result.statusMessage}") } } } }
140. private val endpointDiscoveryCallback = object : EndpointDiscoveryCallback() { }
141. private val endpointDiscoveryCallback = object : EndpointDiscoveryCallback() { override fun onEndpointFound(endpointId: String?, info: DiscoveredEndpointInfo?) { } }
142. private val endpointDiscoveryCallback = object : EndpointDiscoveryCallback() { override fun onEndpointFound(endpointId: String?, info: DiscoveredEndpointInfo?) { endpointId?.let { } } }
143. private val endpointDiscoveryCallback = object : EndpointDiscoveryCallback() { override fun onEndpointFound(endpointId: String?, info: DiscoveredEndpointInfo?) { endpointId?.let { requestConnection(endpointId) } } }
144. private fun requestConnection(endpointId: String) { }
145. private fun requestConnection(endpointId: String) { Nearby.Connections.requestConnection( ) }
146. private fun requestConnection(endpointId: String) { Nearby.Connections.requestConnection( googleApiClient, ) }
147. private fun requestConnection(endpointId: String) { Nearby.Connections.requestConnection( googleApiClient, CLIENT_ID, ) }
148. private fun requestConnection(endpointId: String) { Nearby.Connections.requestConnection( googleApiClient, CLIENT_ID, endpointId, ) }
149. private fun requestConnection(endpointId: String) { Nearby.Connections.requestConnection( googleApiClient, CLIENT_ID, endpointId, requestConnectionCallback ) }
150. val requestConnectionCallback = object : ConnectionLifecycleCallback() { }
151. val requestConnectionCallback = object : ConnectionLifecycleCallback() { override fun onConnectionResult(endpointId: String?, result: ConnectionResolution?) { } }
152. val requestConnectionCallback = object : ConnectionLifecycleCallback() { override fun onConnectionResult(endpointId: String?, result: ConnectionResolution?) { sendDataPayload(endpointId) } }
153. private fun sendDataPayload(endpointId : String) { }
154. private fun sendDataPayload(endpointId : String) { val credentials = getCredentials() }
155. private fun sendDataPayload(endpointId : String) { val credentials = getCredentials() val adapter = moshi.adapter(Credentials::class.java) }
156. private fun sendDataPayload(endpointId : String) { val credentials = getCredentials() val adapter = moshi.adapter(Credentials::class.java) val dataToBeSent = adapter.toJson(credentials) }
157. private fun sendDataPayload(endpointId : String) { val credentials = getCredentials() val adapter = moshi.adapter(Credentials::class.java) val dataToBeSent = adapter.toJson(credentials) dataToBeSent?.let { } }
158. private fun sendDataPayload(endpointId : String) { val credentials = getCredentials() val adapter = moshi.adapter(Credentials::class.java) val dataToBeSent = adapter.toJson(credentials) dataToBeSent?.let { val bytes = dataToBeSent?.toByteArray() } }
159. private fun sendDataPayload(endpointId : String) { val credentials = getCredentials() val adapter = moshi.adapter(Credentials::class.java) val dataToBeSent = adapter.toJson(credentials) dataToBeSent?.let { val bytes = dataToBeSent?.toByteArray() Nearby.Connections.sendPayload(googleApiClient, endpointId, Payload.fromBytes(bytes)) } }
160. Android Things
161. // Android Things private fun startListening() { }
162. // Android Things private fun startListening() { Nearby.Connections.startAdvertising()
 }
163. // Android Things private fun startListening() { Nearby.Connections.startAdvertising( googleApiClient,
164. // Android Things private fun startListening() { Nearby.Connections.startAdvertising( googleApiClient, appName,
165. // Android Things private fun startListening() { Nearby.Connections.startAdvertising( googleApiClient, appName, SERVICE_ID,
166. // Android Things private fun startListening() { Nearby.Connections.startAdvertising( googleApiClient, appName, SERVICE_ID, connectionLifecycleCallback,
167. // Android Things private fun startListening() { Nearby.Connections.startAdvertising( googleApiClient, appName, SERVICE_ID, connectionLifecycleCallback, AdvertisingOptions(Strategy.P2P_STAR))
168. // Android Things private fun startListening() { Nearby.Connections.startAdvertising( googleApiClient, appName, SERVICE_ID, connectionLifecycleCallback, AdvertisingOptions(Strategy.P2P_STAR)) .setResultCallback {})
 }
169. // Android Things private fun startListening() { Nearby.Connections.startAdvertising( googleApiClient, appName, SERVICE_ID, connectionLifecycleCallback, AdvertisingOptions(Strategy.P2P_STAR)) .setResultCallback { result -> when { result.status.isSuccess -> Timber.d("SUCCESS") else -> Timber.w("STATE_READY") })
 }
170. // Android Things private val connectionLifecycleCallback = object : ConnectionLifecycleCallback() { }
171. // Android Things private val connectionLifecycleCallback = object : ConnectionLifecycleCallback() { override fun onConnectionResult(endpointId: String?, result: ConnectionResolution?) { Timber.d("connectionResult from " + endpointId, result) } }
172. // Android Things private val connectionLifecycleCallback = object : ConnectionLifecycleCallback() { override fun onConnectionResult(endpointId: String?, result: ConnectionResolution?) { Timber.d("connectionResult from " + endpointId, result) } override fun onDisconnected(endpointId: String?) { Timber.w("onDisconnected from " + endpointId) } }
173. // Android Things private val connectionLifecycleCallback = object : ConnectionLifecycleCallback() { … override fun onConnectionInitiated(endpointId: String?, connectionInfo: ConnectionInfo?) { } }
174. // Android Things private val connectionLifecycleCallback = object : ConnectionLifecycleCallback() { … override fun onConnectionInitiated(endpointId: String?, connectionInfo: ConnectionInfo?) { Timber.d("onConnectionInitiated from " + endpointId, connectionInfo) Nearby.Connections.acceptConnection( googleApiClient, endpointId, payloadCallback ) } }
175. // Android Things private val payloadCallback = object : PayloadCallback() { }
176. // Android Things private val payloadCallback = object : PayloadCallback() { override fun onPayloadReceived(endpointId: String?, payload: Payload?) { } }
177. // Android Things private val payloadCallback = object : PayloadCallback() { override fun onPayloadReceived(endpointId: String?, payload: Payload?) { payload?.let { onDataReceived(payload.asBytes()) } } }
178. private fun onDataReceived(data: ByteArray) { }
179. private fun onDataReceived(data: ByteArray) { val jsonString = String(data) }
180. private fun onDataReceived(data: ByteArray) { val jsonString = String(data) val adapter = moshi.adapter(Credentials::class.java) }
181. private fun onDataReceived(data: ByteArray) { val jsonString = String(data) val adapter = moshi.adapter(Credentials::class.java) val credentials = adapter.fromJson(jsonString) }
182. private fun onDataReceived(data: ByteArray) { val jsonString = String(data) val adapter = moshi.adapter(Credentials::class.java) val credentials = adapter.fromJson(jsonString) credentials?.let { saveCredentials(credentials) } }
183. Success!!
184. https://github.com/jamescoggan/thingspresentationn • Common code in shared module • Nearby • RainbowHat: ◦ Sensors ◦ Led ◦ Button • Philips Hue (in progress)
185. Questions?
186. Thank you! https://jamescoggan.com @mad_team https://github.com/jamescoggan/thingspresentation