Add Raspberry Pi Sense HAT-related drivers

hts221/.gitignore

@@ -0,0 +1 @@
+/build

hts221/README.md

@@ -0,0 +1,131 @@
+HTS221 driver for Android Things
+================================
+
+This driver supports STMicroelectronics [HTS221][product_hts221] capacitive digital sensor for
+relative humidity and temperature.
+
+NOTE: these drivers are not production-ready. They are offered as sample
+implementations of Android Things user space drivers for common peripherals
+as part of the Developer Preview release. There is no guarantee
+of correctness, completeness or robustness.
+
+How to use the driver
+---------------------
+
+### Gradle dependency
+
+To use the `hts221` driver, simply add the line below to your project's `build.gradle`,
+where `<version>` matches the last version of the driver available on [jcenter][jcenter].
+
+```
+dependencies {
+    compile 'com.google.android.things.contrib:driver-hts221:<version>'
+}
+```
+
+### Sample usage
+
+```java
+import com.google.android.things.contrib.driver.hts221.Hts221;
+
+// Access the environmental sensor:
+
+Hts221 mHts221;
+
+try {
+    mHts221 = new Hts221(i2cBusName);
+} catch (IOException e) {
+    // Couldn't configure the device...
+}
+
+// Read the current humidity:
+
+try {
+    float humidity = mHts221.readHumidity();
+} catch (IOException e) {
+    // Error reading humidity
+}
+
+// Read the current temperature:
+
+try {
+    float temperature = mHts221.readTemperature();
+} catch (IOException e) {
+    // Error reading temperature
+}
+
+// Close the environmental sensor when finished:
+
+try {
+    mHts221.close();
+} catch (IOException e) {
+    // Error closing sensor
+}
+```
+
+If you need to read sensor values continuously, you can register the HTS221 with the system and
+listen for sensor values using the [Sensor APIs][sensors]:
+
+```java
+SensorManager mSensorManager = getSystemService(Context.SENSOR_SERVICE);
+SensorEventListener mHumidityListener = ...;
+SensorEventListener mTemperatureListener = ...;
+Hts221SensorDriver mSensorDriver;
+
+mSensorManager.registerDynamicSensorCallback(new SensorManager.DynamicSensorCallback() {
+    @Override
+    public void onDynamicSensorConnected(Sensor sensor) {
+        if (sensor.getType() == Sensor.TYPE_RELATIVE_HUMIDITY) {
+            mSensorManager.registerListener(mHumidityListener, sensor,
+                    SensorManager.SENSOR_DELAY_NORMAL);
+        } else if (sensor.getType() == Sensor.TYPE_AMBIENT_TEMPERATURE) {
+            mSensorManager.registerListener(mTemperatureListener, sensor,
+                    SensorManager.SENSOR_DELAY_NORMAL);
+        }
+    }
+});
+
+try {
+    mSensorDriver = new Hts221SensorDriver(i2cBusName);
+    mSensorDriver.registerHumiditySensor();
+    mSensorDriver.registerTemperatureSensor();
+} catch (IOException e) {
+    // Error configuring sensor
+}
+
+// Unregister and close the driver when finished:
+
+mSensorManager.unregisterListener(mHumidityListener);
+mSensorManager.unregisterListener(mTemperatureListener);
+mSensorDriver.unregisterHumiditySensor();
+mSensorDriver.unregisterTemperatureSensor();
+try {
+    mSensorDriver.close();
+} catch (IOException e) {
+    // Error closing sensor
+}
+```
+
+License
+-------
+
+Copyright 2016 Macro Yau
+
+Licensed to the Apache Software Foundation (ASF) under one or more contributor
+license agreements.  See the NOTICE file distributed with this work for
+additional information regarding copyright ownership.  The ASF licenses this
+file to you under the Apache License, Version 2.0 (the "License"); you may not
+use this file except in compliance with the License.  You may obtain a copy of
+the License at
+
+  http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+License for the specific language governing permissions and limitations under
+the License.
+
+[product_hts221]: http://www.st.com/en/mems-and-sensors/hts221.html
+[jcenter]: https://bintray.com/google/androidthings/contrib-driver-hts221/_latestVersion
+[sensors]: https://developer.android.com/guide/topics/sensors/sensors_overview.html

hts221/build.gradle

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+apply plugin: 'com.android.library'
+
+android {
+    compileSdkVersion 24
+    buildToolsVersion '24.0.3'
+
+    defaultConfig {
+        minSdkVersion 24
+        targetSdkVersion 24
+        versionCode 1
+        versionName "1.0"
+    }
+}
+
+dependencies {
+    provided 'com.google.android.things:androidthings:0.1-devpreview'
+    compile 'com.android.support:support-annotations:24.2.0'
+
+    testCompile 'junit:junit:4.12'
+    testCompile 'org.mockito:mockito-core:1.10.19'
+}

hts221/publish.gradle

@@ -0,0 +1,97 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ *  To publish on Bintray:
+ *  - set environmental variables BINTRAY_USER and BINTRAY_API_KEY to proper values
+ *  - from this directory:
+ *     ../gradlew -b publish.gradle bintrayUpload
+ *
+ */
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:2.2.1'
+    }
+}
+
+plugins {
+    id "com.jfrog.bintray" version "1.7"
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
+
+apply from: 'build.gradle'
+apply plugin: 'maven-publish'
+
+def packageVersion = '0.1'
+
+task sourceJar(type: Jar) {
+    classifier = 'sources'
+    from android.sourceSets.main.java.sourceFiles
+}
+
+publishing {
+    publications {
+        driverPublish(MavenPublication) {
+            groupId 'com.google.android.things.contrib'
+            artifactId "driver-$project.name"
+            version packageVersion
+            artifacts = configurations.archives.artifacts
+            artifact sourceJar
+            pom.withXml {
+                def dependenciesNode = asNode().appendNode('dependencies')
+                configurations.compile.allDependencies.each {
+                    if(it.group != null && (it.name != null || "unspecified".equals(it.name)) && it.version != null)
+                    {
+                        def dependencyNode = dependenciesNode.appendNode('dependency')
+                        dependencyNode.appendNode('groupId', it.group)
+                        dependencyNode.appendNode('artifactId', it.name)
+                        dependencyNode.appendNode('version', it.version)
+                    }
+                }
+            }
+        }
+    }
+}
+
+bintray {
+  user = System.getenv('BINTRAY_USER')
+  key = System.getenv('BINTRAY_API_KEY')
+  publications = ['driverPublish']
+
+  publish = true
+
+  pkg {
+    repo = 'androidthings'
+    name = "contrib-driver-$project.name"
+    userOrg = 'google'
+
+    version {
+      name = packageVersion
+      gpg {
+        sign = true
+      }
+    }
+  }
+}

hts221/src/main/AndroidManifest.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ Copyright 2016 Google Inc.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.google.android.things.contrib.driver.hts221">
+    <application>
+        <uses-library android:name="com.google.android.things"/>
+    </application>
+</manifest>