Update for new developer preview.

app/build.gradle

@@ -24,12 +24,12 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
     implementation 'com.squareup.retrofit2:retrofit:2.4.0'
     implementation 'com.squareup.retrofit2:converter-moshi:2.4.0'
     testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'com.android.support.test:runner:1.0.1'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
-    compileOnly 'com.google.android.things:androidthings:+'
-    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    compileOnly 'com.google.android.things:androidthings:0.8-devpreview'
+    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 }

app/src/main/java/de/hacknology/spaceui/MainActivity.kt

@@ -4,9 +4,8 @@ import android.app.Activity
 import android.content.Intent
 import android.os.Bundle
 import android.os.Handler
-import android.util.Log
 import android.view.MotionEvent
-import com.google.android.things.device.ScreenManager
+import android.view.WindowManager
 
 class MainActivity : Activity() {
 
@@ -20,7 +19,9 @@ class MainActivity : Activity() {
     override fun onResume() {
         super.onResume()
 
-        ScreenManager.getInstance(0).setBrightness(255)
+        val lp = window.attributes
+        lp.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_FULL
+        window.attributes = lp
 
         resetScreenTimeout()
     }

app/src/main/java/de/hacknology/spaceui/ScreensaverActivity.kt

@@ -3,23 +3,26 @@ package de.hacknology.spaceui
 import android.app.Activity
 import android.os.Bundle
 import android.view.MotionEvent
-import com.google.android.things.device.ScreenManager
+import android.view.WindowManager
 
-class ScreensaverActivity : Activity() {
 
-    private val screenManager = ScreenManager.getInstance(0)
+class ScreensaverActivity : Activity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_screensaver)
 
-        screenManager.setBrightness(0)
+        val lp = window.attributes
+        lp.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_OFF
+        window.attributes = lp
     }
 
     override fun onPause() {
         super.onPause()
 
-        screenManager.setBrightness(255)
+        val lp = window.attributes
+        lp.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_FULL
+        window.attributes = lp
     }
 
     override fun onTouchEvent(event: MotionEvent?): Boolean {

build.gradle

@@ -1,13 +1,13 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.2.31'
+    ext.kotlin_version = '1.2.41'
     repositories {
         google()
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.1.0'
+        classpath 'com.android.tools.build:gradle:3.1.2'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
         // NOTE: Do not place your application dependencies here; they belong