Create Kotlin version of JobScheduler sample

Bug: 64766094
Test: Manual - verified no regression versus Java version.
Change-Id: I2b23750032f1133e4010547e1dd9eb562d245af4

35 files changed, 1499 insertions, 0 deletions

diff --git a/background/JobScheduler/kotlinApp/CONTRIB.md b/background/JobScheduler/kotlinApp/CONTRIB.md
new file mode 100644
index 00000000..14a4fcff
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/CONTRIB.md
@@ -0,0 +1,35 @@
+# How to become a contributor and submit your own code
+
+## Contributor License Agreements
+
+We'd love to accept your sample apps and patches! Before we can take them, we
+have to jump a couple of legal hurdles.
+
+Please fill out either the individual or corporate Contributor License Agreement (CLA).
+
+  * If you are an individual writing original source code and you're sure you
+    own the intellectual property, then you'll need to sign an [individual CLA]
+    (https://developers.google.com/open-source/cla/individual).
+  * If you work for a company that wants to allow you to contribute your work,
+    then you'll need to sign a [corporate CLA]
+    (https://developers.google.com/open-source/cla/corporate).
+
+Follow either of the two links above to access the appropriate CLA and
+instructions for how to sign and return it. Once we receive it, we'll be able to
+accept your pull requests.
+
+## Contributing A Patch
+
+1. Submit an issue describing your proposed change to the repo in question.
+1. The repo owner will respond to your issue promptly.
+1. If your proposed change is accepted, and you haven't already done so, sign a
+   Contributor License Agreement (see details above).
+1. Fork the desired repo, develop and test your code changes.
+1. Ensure that your code adheres to the existing style in the sample to which
+   you are contributing. Refer to the
+   [Android Code Style Guide]
+   (https://source.android.com/source/code-style.html) for the
+   recommended coding standards for this organization.
+1. Ensure that your code has an appropriate set of unit tests which all pass.
+1. Submit a pull request.
+
diff --git a/background/JobScheduler/kotlinApp/README.md b/background/JobScheduler/kotlinApp/README.md
new file mode 100644
index 00000000..319cf2d4
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/README.md
@@ -0,0 +1,60 @@
+
+Android JobScheduler Sample (Kotlin)
+====================================
+
+Demonstration of the JobScheduler API, which provides an interface for scheduling
+background tasks when certain tasks apply.
+
+To understand how this sample works, try these different scenarios:
+
+- Unplug device, schedule a task that requires the device to be plugged in. Job will start when the
+device is plugged in.
+- Set a delay of 10 seconds and press back. The activity and service are finished but the service is
+launched again in 10 seconds (logcat will show debug messages).
+- Set a delay of 5 seconds and a work duration of 10 seconds. Schedule job and press the
+back button. Open the activity again after 6 seconds. The activity will show the onStopTask even
+though both activity and service were shut down.
+
+Pre-requisites
+--------------
+
+- Android SDK 27
+- Android Support Repository
+
+Getting Started
+---------------
+
+This sample uses the Gradle build system. To build this project, use the
+"gradlew build" command or use "Import Project" in Android Studio.
+
+Support
+-------
+
+- Google+ Community: https://plus.google.com/communities/105153134372062985968
+- Stack Overflow: http://stackoverflow.com/questions/tagged/android
+
+If you've found an error in this sample, please file an issue:
+https://github.com/googlesamples/android-JobScheduler
+
+Patches are encouraged, and may be submitted by forking this project and
+submitting a pull request through GitHub. Please see CONTRIBUTING.md for more details.
+
+License
+-------
+
+Copyright 2017 The Android Open Source Project, Inc.
+
+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.
diff --git a/background/JobScheduler/kotlinApp/app/build.gradle b/background/JobScheduler/kotlinApp/app/build.gradle
new file mode 100644
index 00000000..f3bd616c
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/build.gradle
@@ -0,0 +1,27 @@
+apply plugin: 'com.android.application'
+
+apply plugin: 'kotlin-android'
+
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 27
+    defaultConfig {
+        applicationId "com.example.android.jobscheduler"
+        minSdkVersion 21
+        targetSdkVersion 27
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation "com.android.support:appcompat-v7:27.0.0"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
+}
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/app/src/main/AndroidManifest.xml b/background/JobScheduler/kotlinApp/app/src/main/AndroidManifest.xml
new file mode 100644
index 00000000..5230d846
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/AndroidManifest.xml
@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.example.android.jobscheduler">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
+
+    <application
+        android:allowBackup="false"
+        android:icon="@drawable/ic_launcher"
+        android:label="@string/app_name"
+        android:theme="@style/AppTheme" >
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name"
+            android:windowSoftInputMode="stateHidden" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name=".MyJobService"
+            android:permission="android.permission.BIND_JOB_SERVICE"
+            android:exported="true"/>
+    </application>
+
+</manifest>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/ActivityExtensions.kt b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/ActivityExtensions.kt
new file mode 100644
index 00000000..39a9d7e1
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/ActivityExtensions.kt
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.example.android.jobscheduler
+
+import android.app.Activity
+import android.widget.Toast
+
+/**
+ * Helper extension function for showing a [Toast]
+ */
+fun Activity.showToast(text: String) {
+    Toast.makeText(this, text, Toast.LENGTH_SHORT).show()
+}
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/Constants.kt b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/Constants.kt
new file mode 100644
index 00000000..90fc00f8
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/Constants.kt
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+@file:JvmName("Constants")
+@file:Suppress("PropertyName")
+
+package com.example.android.jobscheduler
+
+@JvmField val MSG_UNCOLOR_START = 0
+@JvmField val MSG_UNCOLOR_STOP = 1
+@JvmField val MSG_COLOR_START = 2
+@JvmField val MSG_COLOR_STOP = 3
+
+@JvmField val MESSENGER_INTENT_KEY = "${BuildConfig.APPLICATION_ID}.MESSENGER_INTENT_KEY"
+@JvmField val WORK_DURATION_KEY = "${BuildConfig.APPLICATION_ID}.WORK_DURATION_KEY"
diff --git a/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/IncomingMessageHandler.kt b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/IncomingMessageHandler.kt
new file mode 100644
index 00000000..9d5b1148
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/IncomingMessageHandler.kt
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.example.android.jobscheduler
+
+import android.os.Handler
+import android.os.Message
+import android.os.Messenger
+import android.support.v4.content.ContextCompat.getColor
+import android.view.View
+import android.widget.TextView
+import java.lang.ref.WeakReference
+import java.util.concurrent.TimeUnit
+
+/**
+ * A [Handler] allows you to send messages associated with a thread. A [Messenger]
+ * uses this handler to communicate from [MyJobService]. It's also used to make
+ * the start and stop views blink for a short period of time.
+ */
+internal class IncomingMessageHandler(activity: MainActivity) : Handler() {
+
+    // Prevent possible leaks with a weak reference.
+    private val mainActivity: WeakReference<MainActivity> = WeakReference(activity)
+
+    override fun handleMessage(msg: Message) {
+        val mainActivity = mainActivity.get() ?: return
+        val showStartView = mainActivity.findViewById<View>(R.id.onstart_textview)
+        val showStopView = mainActivity.findViewById<View>(R.id.onstop_textview)
+        when (msg.what) {
+            /*
+             * Receives callback from the service when a job has landed
+             * on the app. Turns on indicator and sends a message to turn it off after
+             * a second.
+             */
+            MSG_COLOR_START -> {
+                // Start received, turn on the indicator and show text.
+                showStartView.setBackgroundColor(getColor(mainActivity, R.color.start_received))
+                updateParamsTextView(msg.obj, "started")
+                sendMessageDelayed(Message.obtain(this, MSG_UNCOLOR_START),
+                        TimeUnit.SECONDS.toMillis(1))
+            }
+            /*
+             * Receives callback from the service when a job that previously landed on the
+             * app must stop executing. Turns on indicator and sends a message to turn it
+             * off after two seconds.
+             */
+            MSG_COLOR_STOP -> {
+                // Stop received, turn on the indicator and show text.
+                showStopView.setBackgroundColor(getColor(mainActivity, R.color.stop_received))
+                updateParamsTextView(msg.obj, "stopped")
+                sendMessageDelayed(obtainMessage(MSG_UNCOLOR_STOP), TimeUnit.SECONDS.toMillis(1))
+            }
+            MSG_UNCOLOR_START -> {
+                uncolorButtonAndClearText(showStartView, mainActivity)
+            }
+            MSG_UNCOLOR_STOP -> {
+                uncolorButtonAndClearText(showStopView, mainActivity)
+            }
+        }
+    }
+
+    private fun uncolorButtonAndClearText(textView: View, activity: MainActivity) {
+        textView.setBackgroundColor(getColor(activity, R.color.none_received))
+        updateParamsTextView()
+    }
+
+    private fun updateParamsTextView(jobId: Any? = null, action: String = "") {
+        val mainActivity = mainActivity.get() ?: return
+        val paramsTextView = mainActivity.findViewById<TextView>(R.id.task_params)
+        if (jobId == null) {
+            paramsTextView.text = ""
+            return
+        }
+        paramsTextView.text = mainActivity.getString(R.string.job_status, jobId.toString(), action)
+    }
+}
diff --git a/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/MainActivity.kt b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/MainActivity.kt
new file mode 100644
index 00000000..b28d5c47
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/MainActivity.kt
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.example.android.jobscheduler
+
+import android.app.Activity
+import android.app.job.JobInfo
+import android.app.job.JobScheduler
+import android.content.ComponentName
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.os.Messenger
+import android.os.PersistableBundle
+import android.util.Log
+import android.widget.Button
+import android.widget.CheckBox
+import android.widget.EditText
+import android.widget.RadioButton
+import java.util.concurrent.TimeUnit
+
+/**
+ * Schedules and configures jobs to be executed by a [JobScheduler].
+ *
+ * [MyJobService] can send messages to this via a [Messenger]
+ * that is sent in the Intent that starts the Service.
+ */
+class MainActivity : Activity() {
+
+    lateinit private var anyConnectivityRadioButton: RadioButton
+    lateinit private var deadlineEditText: EditText
+    lateinit private var delayEditText: EditText
+    lateinit private var durationTimeEditText: EditText
+    lateinit private var requiresChargingCheckBox: CheckBox
+    lateinit private var requiresIdleCheckbox: CheckBox
+    lateinit private var wiFiConnectivityRadioButton: RadioButton
+
+    // Handler for incoming messages from the service.
+    lateinit private var handler: IncomingMessageHandler
+    lateinit private var serviceComponent: ComponentName
+    private var jobId = 0
+
+    public override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.sample_main)
+
+        anyConnectivityRadioButton = findViewById(R.id.checkbox_any)
+        deadlineEditText = findViewById(R.id.deadline_time)
+        delayEditText = findViewById(R.id.delay_time)
+        durationTimeEditText = findViewById(R.id.duration_time)
+        requiresChargingCheckBox = findViewById(R.id.checkbox_charging)
+        requiresIdleCheckbox = findViewById(R.id.checkbox_idle)
+        wiFiConnectivityRadioButton = findViewById(R.id.checkbox_unmetered)
+
+        handler = IncomingMessageHandler(this)
+        serviceComponent = ComponentName(this, MyJobService::class.java)
+
+        findViewById<Button>(R.id.cancel_button).setOnClickListener { cancelAllJobs() }
+        findViewById<Button>(R.id.finished_button).setOnClickListener { finishJob() }
+        findViewById<Button>(R.id.schedule_button).setOnClickListener { scheduleJob() }
+    }
+
+    override fun onStop() {
+        // A service can be "started" and/or "bound". In this case, it's "started" by this Activity
+        // and "bound" to the JobScheduler (also called "Scheduled" by the JobScheduler). This call
+        // to stopService() won't prevent scheduled jobs to be processed. However, failing
+        // to call stopService() would keep it alive indefinitely.
+        stopService(Intent(this, MyJobService::class.java))
+        super.onStop()
+    }
+
+    override fun onStart() {
+        super.onStart()
+        // Start service and provide it a way to communicate with this class.
+        val startServiceIntent = Intent(this, MyJobService::class.java)
+        val messengerIncoming = Messenger(handler)
+        startServiceIntent.putExtra(MESSENGER_INTENT_KEY, messengerIncoming)
+        startService(startServiceIntent)
+    }
+
+    /**
+     * Executed when user clicks on SCHEDULE JOB.
+     */
+    private fun scheduleJob() {
+        val builder = JobInfo.Builder(jobId++, serviceComponent)
+
+        val delay = delayEditText.text.toString()
+        if (delay.isNotEmpty()) {
+            builder.setMinimumLatency(delay.toLong() * TimeUnit.SECONDS.toMillis(1))
+        }
+
+        val deadline = deadlineEditText.text.toString()
+        if (deadline.isNotEmpty()) {
+            builder.setOverrideDeadline(deadline.toLong() * TimeUnit.SECONDS.toMillis(1))
+        }
+
+        if (wiFiConnectivityRadioButton.isChecked) {
+            builder.setRequiredNetworkType(JobInfo.NETWORK_TYPE_UNMETERED)
+        } else if (anyConnectivityRadioButton.isChecked) {
+            builder.setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
+        }
+
+        // Extras, work duration.
+        val extras = PersistableBundle()
+        var workDuration = durationTimeEditText.text.toString()
+        if (workDuration.isEmpty()) workDuration = "1"
+        extras.putLong(WORK_DURATION_KEY, workDuration.toLong() * TimeUnit.SECONDS.toMillis(1))
+
+        // Finish configuring the builder
+        builder.run {
+            setRequiresDeviceIdle(requiresIdleCheckbox.isChecked)
+            setRequiresCharging(requiresChargingCheckBox.isChecked)
+            setExtras(extras)
+        }
+
+        // Schedule job
+        Log.d(TAG, "Scheduling job")
+        (getSystemService(Context.JOB_SCHEDULER_SERVICE) as JobScheduler).schedule(builder.build())
+    }
+
+    /**
+     * Executed when user clicks on CANCEL ALL.
+     */
+    private fun cancelAllJobs() {
+        (getSystemService(Context.JOB_SCHEDULER_SERVICE) as JobScheduler).cancelAll()
+        showToast(getString(R.string.all_jobs_cancelled))
+    }
+
+    /**
+     * Executed when user clicks on FINISH LAST TASK.
+     */
+    private fun finishJob() {
+        val jobScheduler = getSystemService(Context.JOB_SCHEDULER_SERVICE) as JobScheduler
+        val allPendingJobs = jobScheduler.allPendingJobs
+        if (allPendingJobs.size > 0) {
+            // Finish the last one.
+            // Example: If jobs a, b, and c are queued in that order, this method will cancel job c.
+            val id = allPendingJobs.first().id
+            jobScheduler.cancel(id)
+            showToast(getString(R.string.cancelled_job, id))
+        } else {
+            showToast(getString(R.string.no_jobs_to_cancel))
+        }
+    }
+
+    companion object {
+        private val TAG = "MainActivity"
+    }
+}
diff --git a/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/MyJobService.kt b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/MyJobService.kt
new file mode 100644
index 00000000..3c6cc54a
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/java/com/example/android/jobscheduler/MyJobService.kt
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2017 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.example.android.jobscheduler
+
+import android.app.Service
+import android.app.job.JobParameters
+import android.app.job.JobService
+import android.content.Intent
+import android.os.Handler
+import android.os.Message
+import android.os.Messenger
+import android.os.RemoteException
+import android.util.Log
+
+/**
+ * Service to handle callbacks from the JobScheduler. Requests scheduled with the JobScheduler
+ * ultimately land on this service's "onStartJob" method. It runs jobs for a specific amount of time
+ * and finishes them. It keeps the activity updated with changes via a Messenger.
+ */
+class MyJobService : JobService() {
+
+    private var activityMessenger: Messenger? = null
+
+    /**
+     * When the app's MainActivity is created, it starts this service. This is so that the
+     * activity and this service can communicate back and forth. See "setUiCallback()"
+     */
+    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
+        activityMessenger = intent.getParcelableExtra(MESSENGER_INTENT_KEY)
+        return Service.START_NOT_STICKY
+    }
+
+    override fun onStartJob(params: JobParameters): Boolean {
+        // The work that this service "does" is simply wait for a certain duration and finish
+        // the job (on another thread).
+        sendMessage(MSG_COLOR_START, params.jobId)
+
+        // Uses a Handler to delay the execution of jobFinished().
+        val duration = params.extras.getLong(WORK_DURATION_KEY)
+        Handler().postDelayed({
+            sendMessage(MSG_COLOR_STOP, params.jobId)
+            jobFinished(params, false)
+        }, duration)
+        Log.i(TAG, "on start job: ${params.jobId}")
+
+        // Return true as there's more work to be done with this job.
+        return true
+    }
+
+    override fun onStopJob(params: JobParameters): Boolean {
+        // Stop tracking these job parameters, as we've 'finished' executing.
+        sendMessage(MSG_COLOR_STOP, params.jobId)
+        Log.i(TAG, "on stop job: ${params.jobId}")
+
+        // Return false to drop the job.
+        return false
+    }
+
+    private fun sendMessage(messageID: Int, params: Any?) {
+        // If this service is launched by the JobScheduler, there's no callback Messenger. It
+        // only exists when the MainActivity calls startService() with the callback in the Intent.
+        if (activityMessenger == null) {
+            Log.d(TAG, "Service is bound, not started. There's no callback to send a message to.")
+            return
+        }
+        val message = Message.obtain()
+        message.run {
+            what = messageID
+            obj = params
+        }
+        try {
+            activityMessenger?.send(message)
+        } catch (e: RemoteException) {
+            Log.e(TAG, "Error passing service object back to activity.")
+        }
+    }
+
+    companion object {
+        private val TAG = "MyJobService"
+    }
+}
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/drawable-hdpi/ic_launcher.png b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-hdpi/ic_launcher.png
new file mode 100644
index 00000000..9cb5f741
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-hdpi/ic_launcher.png
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/drawable-hdpi/tile.9.png b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-hdpi/tile.9.png
new file mode 100644
index 00000000..13586288
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-hdpi/tile.9.png
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/drawable-mdpi/ic_launcher.png b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-mdpi/ic_launcher.png
new file mode 100644
index 00000000..869355b5
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-mdpi/ic_launcher.png
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/drawable-xhdpi/ic_launcher.png b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-xhdpi/ic_launcher.png
new file mode 100644
index 00000000..679fc16f
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-xhdpi/ic_launcher.png
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/drawable-xxhdpi/ic_launcher.png b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-xxhdpi/ic_launcher.png
new file mode 100644
index 00000000..1734fd35
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/drawable-xxhdpi/ic_launcher.png
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/layout/sample_main.xml b/background/JobScheduler/kotlinApp/app/src/main/res/layout/sample_main.xml
new file mode 100644
index 00000000..84a21943
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/layout/sample_main.xml
@@ -0,0 +1,244 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/layout_height">
+
+            <TextView
+                android:id="@+id/onstart_textview"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_margin="@dimen/textview_margin"
+                android:layout_weight="1"
+                android:background="@color/none_received"
+                android:gravity="center"
+                android:text="@string/onstarttask" />
+
+            <TextView
+                android:id="@+id/onstop_textview"
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_margin="@dimen/textview_margin"
+                android:layout_weight="1"
+                android:background="@color/none_received"
+                android:gravity="center"
+                android:text="@string/onstoptask" />
+
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/task_params"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_marginBottom="@dimen/textview_bottom_margin"
+            android:layout_weight="1"
+            android:gravity="center"
+            android:padding="@dimen/textview_margin"
+            android:textSize="@dimen/large_text_size" />
+
+        <Button
+            android:id="@+id/finished_button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:padding="@dimen/button_padding"
+            android:layout_marginBottom="@dimen/button_bottom_margin"
+            android:layout_marginLeft="@dimen/button_horizontal_margins"
+            android:layout_marginRight="@dimen/button_horizontal_margins"
+            android:text="@string/finish_job_button_text" />
+
+        <TableLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_margin="@dimen/table_margin">
+
+            <TableRow
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="@dimen/textview_margin"
+                    android:labelFor="@id/duration_time"
+                    android:gravity="end|center_vertical"
+                    android:text="@string/work_duration"
+                    android:textSize="@dimen/default_text_size" />
+
+                <EditText
+                    android:id="@+id/duration_time"
+                    android:layout_width="@dimen/edittext_width"
+                    android:layout_height="wrap_content"
+                    android:inputType="number"
+                    android:text="@string/default_duration_time" />
+
+            </TableRow>
+
+            <TableRow
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="@dimen/textview_margin"
+                    android:gravity="end|center_vertical"
+                    android:text="@string/connectivity"
+                    android:textSize="@dimen/default_text_size" />
+
+                <RadioGroup
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                    <RadioButton
+                        android:id="@+id/checkbox_any"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:checked="true"
+                        android:text="@string/any" />
+
+                    <RadioButton
+                        android:id="@+id/checkbox_unmetered"
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:text="@string/unmetered" />
+
+                </RadioGroup>
+
+            </TableRow>
+
+            <TableRow
+                android:layout_width="match_parent"
+                android:layout_height="match_parent">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="@dimen/textview_margin"
+                    android:gravity="end|center_vertical"
+                    android:text="@string/delay"
+                    android:textSize="@dimen/default_text_size" />
+
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:orientation="horizontal">
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:labelFor="@id/delay_time"
+                        android:text="@string/timing" />
+
+                    <EditText
+                        android:id="@+id/delay_time"
+                        android:layout_width="@dimen/edittext_width"
+                        android:layout_height="wrap_content"
+                        android:inputType="number"
+                        android:text="@string/default_delay_time" />
+
+                    <TextView
+                        android:layout_width="wrap_content"
+                        android:layout_height="wrap_content"
+                        android:labelFor="@id/deadline_time"
+                        android:text="@string/deadline"
+                        android:textSize="@dimen/default_text_size" />
+
+                    <EditText
+                        android:id="@+id/deadline_time"
+                        android:layout_width="@dimen/edittext_width"
+                        android:layout_height="wrap_content"
+                        android:inputType="number"
+                        android:text="@string/default_deadline_time" />
+
+                </LinearLayout>
+
+            </TableRow>
+
+            <TableRow
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="@dimen/tablerow_margin_end"
+                    android:gravity="end|center_vertical"
+                    android:text="@string/charging_caption"
+                    android:textSize="@dimen/default_text_size" />
+
+                <CheckBox
+                    android:id="@+id/checkbox_charging"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/charging_text" />
+
+            </TableRow>
+
+            <TableRow
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_weight="1">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="match_parent"
+                    android:layout_marginEnd="@dimen/tablerow_margin_end"
+                    android:gravity="end|center_vertical"
+                    android:text="@string/idle_caption" />
+
+                <CheckBox
+                    android:id="@+id/checkbox_idle"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/idle_mode_text" />
+
+            </TableRow>
+
+        </TableLayout>
+
+        <Button
+            android:id="@+id/schedule_button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/button_top_margin"
+            android:layout_marginLeft="@dimen/button_horizontal_margins"
+            android:layout_marginRight="@dimen/button_horizontal_margins"
+            android:text="@string/schedule_job_button_text" />
+        <Button
+            android:id="@+id/cancel_button"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginLeft="@dimen/button_horizontal_margins"
+            android:layout_marginRight="@dimen/button_horizontal_margins"
+            android:text="@string/cancel_all_jobs_button_text" />
+
+    </LinearLayout>
+
+</ScrollView>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values-sw600dp/template-dimens.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values-sw600dp/template-dimens.xml
new file mode 100644
index 00000000..21447966
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values-sw600dp/template-dimens.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!-- Semantic definitions -->
+
+    <dimen name="horizontal_page_margin">@dimen/margin_huge</dimen>
+    <dimen name="vertical_page_margin">@dimen/margin_medium</dimen>
+
+</resources>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values-sw600dp/template-styles.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values-sw600dp/template-styles.xml
new file mode 100644
index 00000000..3dd911c7
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values-sw600dp/template-styles.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <style name="Widget.SampleMessage">
+        <item name="android:textAppearance">?android:textAppearanceLarge</item>
+        <item name="android:lineSpacingMultiplier">1.2</item>
+        <item name="android:shadowDy">-6.5</item>
+    </style>
+
+</resources>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values-v11/styles.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values-v11/styles.xml
new file mode 100644
index 00000000..19035468
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values-v11/styles.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!--
+        Base application theme for API 11+. This theme completely replaces
+        AppBaseTheme from res/values/sample-styles.xml on API 11+ devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Holo.Light">
+        <!-- API 11 theme customizations can go here. -->
+    </style>
+
+</resources>
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values-v11/template-styles.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values-v11/template-styles.xml
new file mode 100644
index 00000000..000ff51c
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values-v11/template-styles.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!-- Activity themes -->
+    <style name="Theme.Base" parent="android:Theme.Holo.Light" />
+
+</resources>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values-v14/styles.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values-v14/styles.xml
new file mode 100644
index 00000000..9c21dbed
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values-v14/styles.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!--
+        Base application theme for API 14+. This theme completely replaces
+        AppBaseTheme from BOTH res/values/sample-styles.xml and
+        res/values-v11/sample-styles.xml on API 14+ devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Holo.Light.DarkActionBar">
+        <!-- API 14 theme customizations can go here. -->
+    </style>
+
+</resources>
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values-v21/base-template-styles.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values-v21/base-template-styles.xml
new file mode 100644
index 00000000..28215b70
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values-v21/base-template-styles.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!-- Activity themes -->
+    <style name="Theme.Base" parent="android:Theme.Material.Light">
+    </style>
+
+</resources>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values/base-strings.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values/base-strings.xml
new file mode 100644
index 00000000..034a3bfe
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values/base-strings.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+    <string name="app_name">JobScheduler</string>
+    <string name="intro_message">
+        <![CDATA[
+        
+            
+            Demonstration of the JobScheduler API, which provides an interface for scheduling
+            background tasks when certain tasks apply.
+            
+        
+        ]]>
+    </string>
+</resources>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values/color.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values/color.xml
new file mode 100644
index 00000000..5431f76a
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values/color.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+    <color name="none_received">#999999</color>
+    <color name="start_received">#00FF00</color>
+    <color name="stop_received">#FF0000</color>
+</resources>
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values/dimens.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values/dimens.xml
new file mode 100644
index 00000000..859937fe
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values/dimens.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+    <dimen name="default_text_size">14sp</dimen>
+    <dimen name="large_text_size">20sp</dimen>
+    <dimen name="button_horizontal_margins">40dp</dimen>
+    <dimen name="button_top_margin">20dp</dimen>
+    <dimen name="tablerow_margin_end">12dp</dimen>
+    <dimen name="edittext_width">48dp</dimen>
+    <dimen name="textview_margin">12dp</dimen>
+    <dimen name="textview_bottom_margin">10dp</dimen>
+    <dimen name="button_padding">20dp</dimen>
+    <dimen name="button_bottom_margin">5dp</dimen>
+    <dimen name="layout_height">100dp</dimen>
+    <dimen name="table_margin">8dp</dimen>
+</resources>
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values/strings.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values/strings.xml
new file mode 100644
index 00000000..f0e26b74
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values/strings.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+    <string name="onstoptask">onStopTask</string>
+    <string name="onstarttask">onStartTask</string>
+    <string name="defaultparamtext">task params will show up here.</string>
+    <string name="schedule_job_button_text">Schedule Job</string>
+    <string name="cancel_all_jobs_button_text">Cancel all</string>
+    <string name="finish_job_button_text">Finish last task</string>
+    <string name="idle_mode_text">Requires device in idle mode.</string>
+    <string name="charging_caption">Charging:</string>
+    <string name="charging_text">Requires device plugged in.</string>
+    <string name="idle_caption">Idle:</string>
+    <string name="connectivity">Connectivity:</string>
+    <string name="any">Any</string>
+    <string name="unmetered">WiFi</string>
+    <string name="timing">Timing:</string>
+    <string name="delay">Delay:</string>
+    <string name="deadline">Deadline:</string>
+    <string name="work_duration">Work duration:</string>
+    <string name="cancelled_job">Cancelled job %d</string>
+    <string name="no_jobs_to_cancel">No jobs to cancel</string>
+    <string name="all_jobs_cancelled">All jobs cancelled</string>
+    <string name="job_status">Job ID %s %s</string>
+    <string name="default_duration_time">2</string>
+    <string name="default_delay_time">0</string>
+    <string name="default_deadline_time">15</string>
+</resources>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values/styles.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values/styles.xml
new file mode 100644
index 00000000..c174da46
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values/styles.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!--
+        Base application theme, dependent on API level. This theme is replaced
+        by AppBaseTheme from res/values-vXX/styles.xml on newer devices.
+    -->
+    <style name="AppBaseTheme" parent="android:Theme.Light">
+        <!--
+            Theme customizations available in newer API levels can go in
+            res/values-vXX/styles.xml, while customizations related to
+            backward-compatibility can go here.
+        -->
+    </style>
+
+</resources>
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values/template-dimens.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values/template-dimens.xml
new file mode 100644
index 00000000..30a0d8d5
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values/template-dimens.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!-- Define standard dimensions to comply with Holo-style grids and rhythm. -->
+
+    <dimen name="margin_tiny">4dp</dimen>
+    <dimen name="margin_small">8dp</dimen>
+    <dimen name="margin_medium">16dp</dimen>
+    <dimen name="margin_large">32dp</dimen>
+    <dimen name="margin_huge">64dp</dimen>
+
+    <!-- Semantic definitions -->
+
+    <dimen name="horizontal_page_margin">@dimen/margin_medium</dimen>
+    <dimen name="vertical_page_margin">@dimen/margin_medium</dimen>
+
+</resources>
diff --git a/background/JobScheduler/kotlinApp/app/src/main/res/values/template-styles.xml b/background/JobScheduler/kotlinApp/app/src/main/res/values/template-styles.xml
new file mode 100644
index 00000000..357da342
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/app/src/main/res/values/template-styles.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+Copyright 2017 The Android Open Source Project
+
+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.
+-->
+
+<resources>
+
+    <!-- Activity themes -->
+
+    <style name="Theme.Base" parent="android:Theme.Light" />
+
+    <style name="Theme.Sample" parent="Theme.Base" />
+
+    <style name="AppTheme" parent="Theme.Sample" />
+    <!-- Widget styling -->
+
+    <style name="Widget" />
+
+    <style name="Widget.SampleMessage">
+        <item name="android:textAppearance">?android:textAppearanceMedium</item>
+        <item name="android:lineSpacingMultiplier">1.1</item>
+    </style>
+
+    <style name="Widget.SampleMessageTile">
+        <item name="android:background">@drawable/tile</item>
+        <item name="android:shadowColor">#7F000000</item>
+        <item name="android:shadowDy">-3.5</item>
+        <item name="android:shadowRadius">2</item>
+    </style>
+
+</resources>
diff --git a/background/JobScheduler/kotlinApp/build.gradle b/background/JobScheduler/kotlinApp/build.gradle
new file mode 100644
index 00000000..5dc45d16
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/build.gradle
@@ -0,0 +1,22 @@
+buildscript {
+    ext.kotlin_version = '1.1.60'
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.0.0'
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
\ No newline at end of file
diff --git a/background/JobScheduler/kotlinApp/gradle/wrapper/gradle-wrapper.jar b/background/JobScheduler/kotlinApp/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..8c0fb64a
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/gradle/wrapper/gradle-wrapper.jar
diff --git a/background/JobScheduler/kotlinApp/gradle/wrapper/gradle-wrapper.properties b/background/JobScheduler/kotlinApp/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..32ed0311
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Tue Nov 07 16:05:05 PST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
diff --git a/background/JobScheduler/kotlinApp/gradlew b/background/JobScheduler/kotlinApp/gradlew
new file mode 100755
index 00000000..91a7e269
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/gradlew
@@ -0,0 +1,164 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched.
+if $cygwin ; then
+    [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+fi
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >&-
+APP_HOME="`pwd -P`"
+cd "$SAVED" >&-
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
diff --git a/background/JobScheduler/kotlinApp/gradlew.bat b/background/JobScheduler/kotlinApp/gradlew.bat
new file mode 100644
index 00000000..8a0b282a
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/gradlew.bat
@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/background/JobScheduler/kotlinApp/packaging.yaml b/background/JobScheduler/kotlinApp/packaging.yaml
new file mode 100644
index 00000000..edef14fe
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/packaging.yaml
@@ -0,0 +1,15 @@
+# GOOGLE SAMPLE PACKAGING DATA
+#
+# This file is used by Google as part of our samples packaging process.
+# End users may safely ignore this file. It has no relevance to other systems.
+---
+
+status:       PUBLISHED
+technologies: [Android]
+categories:   [Background]
+languages:    [Kotlin]
+solutions:    [Mobile]
+github:       googlesamples/android-JobScheduler
+level:        BEGINNER
+icon:         JobSchedulerSample/src/main/res/drawable-xxhdpi/ic_launcher.png
+license:      apache2
diff --git a/background/JobScheduler/kotlinApp/settings.gradle b/background/JobScheduler/kotlinApp/settings.gradle
new file mode 100644
index 00000000..4c90568a
--- /dev/null
+++ b/background/JobScheduler/kotlinApp/settings.gradle
@@ -0,0 +1 @@
+include 'app'