Initial commit

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

.github/ISSUE_TEMPLATE/android-basics-dogglers-app.md

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+---
+name: 'Android Basics: Dogglers app'
+about: Describe this issue template's purpose here.
+title: 'Android Basics: Dogglers app'
+labels: ''
+assignees: ''
+
+---
+
+**URL of codelab**
+
+
+**In which task and step of the codelab can this issue be found?**
+
+
+**Describe the problem**
+
+
+
+
+**Steps to reproduce?**
+1. Go to...
+2. Click on...
+3. See error...
+
+**Versions**
+_Android Studio version:_ 
+_API version of the emulator:_ 
+
+
+**Additional information**
+_Include screenshots if they would be useful in clarifying the problem._

.gitignore

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+# Gradle files
+.gradle/
+build/
+
+# Local configuration file (sdk path, etc)
+local.properties
+
+# Log/OS Files
+*.log
+
+# Android Studio generated files and folders
+captures/
+.externalNativeBuild/
+.cxx/
+*.apk
+output.json
+
+# IntelliJ
+*.iml
+.idea/
+
+# Keystore files
+*.jks
+*.keystore
+
+# Google Services (e.g. APIs or Firebase)
+google-services.json
+
+# Android Profiling
+*.hprof

CONTRIBUTING.md

@@ -0,0 +1,29 @@
+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement (CLA). You (or your employer) retain the copyright to your
+contribution; this simply gives us permission to use and redistribute your
+contributions as part of the project. Head over to
+<https://cla.developers.google.com/> to see your current agreements on file or
+to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+## Community Guidelines
+
+This project follows
+[Google's Open Source Community Guidelines](https://opensource.google/conduct/).

LICENSE

@@ -0,0 +1,201 @@
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+
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+   See the License for the specific language governing permissions and
+   limitations under the License.

README.md

@@ -0,0 +1,27 @@
+Dogglers - Starter Code
+==================================
+
+Starter code for the second independent project for [Android Basics in Kotlin](https://developer.android.com/courses/android-basics-kotlin/course).
+
+Introduction
+------------
+
+This is the starter code for the Dogglers app project in the [final pathway](https://developer.android.com/courses/pathways/android-basics-kotlin-unit-2-pathway-3) of Android Basics [Unit 2](https://developer.android.com/courses/android-basics-kotlin/unit-2). This project is an opportunity for you to demonstrate the concepts you learned in the unit.
+
+Pre-requisites
+--------------
+
+- Complete [Unit 2](https://developer.android.com/courses/android-basics-kotlin/unit-2) of Android Basics in Kotlin
+
+Getting Started
+---------------
+
+1. Download the starter code
+2. Open the project in Android Studio
+3. Complete the project in accordance with the [project instructions](https://developer.android.com/codelabs/basic-android-kotlin-training-project-dogglers-app?continue=https%3A%2F%2Fdeveloper.android.com%2Fcourses%2Fpathways%2Fandroid-basics-kotlin-unit-2-pathway-3%23codelab-https%3A%2F%2Fdeveloper.android.com%2Fcodelabs%2Fbasic-android-kotlin-training-project-dogglers-app#0)
+
+Tips
+----
+
+- Use the provided tests to ensure your app is running as expected
+- DO NOT ALTER THE PROVIDED TESTS

app/build.gradle

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+/*
+* Copyright (C) 2021 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.
+*/
+plugins {
+    id 'com.android.application'
+    id 'kotlin-android'
+}
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "com.example.dogglers"
+        minSdkVersion 21
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
+
+    buildFeatures{
+        viewBinding = true
+    }
+}
+
+dependencies {
+
+    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
+    implementation 'androidx.core:core-ktx:1.3.2'
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.android.material:material:1.3.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.3.0'
+    debugImplementation "androidx.fragment:fragment-testing:1.3.3"
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/dogglers/BaseTest.kt

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+/*
+* Copyright (C) 2021 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.dogglers
+
+import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.drawable.BitmapDrawable
+import android.graphics.drawable.Drawable
+import android.view.View
+import android.widget.ImageView
+import androidx.annotation.DrawableRes
+import androidx.core.content.ContextCompat
+import androidx.recyclerview.widget.RecyclerView
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.NoMatchingViewException
+import androidx.test.espresso.ViewAssertion
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.matcher.BoundedMatcher
+import androidx.test.espresso.matcher.ViewMatchers
+import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
+import androidx.test.espresso.matcher.ViewMatchers.withText
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.example.dogglers.BaseTest.DrawableMatcher.withDrawable
+import com.example.dogglers.data.DataSource
+import org.hamcrest.CoreMatchers
+import org.hamcrest.Description
+import org.hamcrest.Matcher
+import java.lang.IllegalStateException
+
+open class BaseTest {
+
+    val lastPosition = DataSource.dogs.size - 1
+
+    /**
+     * Check the content of a card
+     *
+     * @param name
+     * @param age The full age string as it appears on the screen
+     * @param hobbies The full hobbies string as it appears on the screen
+     * @param imageResource The image resource Id
+     */
+    private fun hasListItemContent(name: String, age: String, hobbies: String, imageResource: Int) {
+        onView(withText(name))
+            .check(matches(isDisplayed()))
+        onView(withText(age))
+            .check(matches(isDisplayed()))
+        onView(withText(hobbies))
+            .check(matches(isDisplayed()))
+        onView(withDrawable(imageResource))
+            .check(matches(isDisplayed()))
+    }
+
+    /**
+     * Check the content of the first card
+     */
+    fun checkFirstPosition() {
+        hasListItemContent("Tzeitel", "Age: 7", "Hobbies: sunbathing",
+            R.drawable.tzeitel)
+    }
+
+    /**
+     * Custom matcher to find drawable.
+     */
+    object DrawableMatcher {
+
+        /**
+         * Invokes the [RecyclerViewAssertion] to check the RecyclerView has the correct count
+         *
+         * @param count The expected number of items in the RecyclerView adapter
+         */
+        fun hasItemCount(count: Int): ViewAssertion {
+            return RecyclerViewAssertion(count)
+        }
+
+        fun withDrawable(@DrawableRes resourceId: Int): Matcher<View> {
+            return object : BoundedMatcher<View, ImageView>(ImageView::class.java) {
+                override fun describeTo(description: Description?) {
+                    description!!.appendText("has drawable resource $resourceId")
+                }
+
+                override fun matchesSafely(imageView: ImageView): Boolean {
+                    return isSameBitmap(imageView, imageView.drawable, resourceId)
+                }
+            }
+        }
+
+        private fun isSameBitmap(item: View, drawable: Drawable?, expectedResId: Int): Boolean {
+            val image = item as ImageView
+            if (expectedResId < 0) {
+                return image.drawable == null
+            }
+            val expectedDrawable: Drawable? = ContextCompat.getDrawable(item.context, expectedResId)
+            if (drawable == null || expectedDrawable == null) {
+                return false
+            }
+
+            // In the case we are not checking a vector drawable, we can get the bitmap directly
+            if (drawable is BitmapDrawable && expectedDrawable is BitmapDrawable) {
+                val found = drawable.bitmap
+                val expected = expectedDrawable.bitmap
+                return found.sameAs(expected)
+            }
+            // Make tint consistent just in case they differ
+            drawable.setTint(android.R.color.black)
+            expectedDrawable.setTint(android.R.color.black)
+            val bitmap = getBitmap(drawable)
+            val expectedBitmap = getBitmap(expectedDrawable)
+            return bitmap.sameAs(expectedBitmap)
+        }
+
+        /**
+         * Convert vector drawable to bitmap
+         * @param drawable vector drawable
+         */
+        private fun getBitmap(drawable: Drawable): Bitmap {
+            val bitmap = Bitmap.createBitmap(
+                    drawable.intrinsicWidth,
+                    drawable.intrinsicHeight,
+                    Bitmap.Config.ARGB_8888
+            )
+            val canvas = Canvas(bitmap)
+            drawable.setBounds(0, 0, canvas.width, canvas.height)
+            drawable.draw(canvas)
+            return bitmap
+        }
+
+        /**
+         * Custom view assertion to check:
+         * The RecyclerView exists
+         * The RecyclerView has an adapter
+         * The adapter contains the expected number of items
+         *
+         * @param count The expected number of adapter items
+         */
+        private class RecyclerViewAssertion(private val count: Int) : ViewAssertion {
+            override fun check(view: View?, noViewFoundException: NoMatchingViewException?) {
+                if (noViewFoundException != null) {
+                    throw noViewFoundException
+                }
+
+                if (view !is RecyclerView) {
+                    throw IllegalStateException("The view is not a RecyclerView")
+                }
+
+                if (view.adapter == null) {
+                    throw IllegalStateException("No adapter assigned to RecyclerView")
+                }
+
+                // Check item count
+                ViewMatchers.assertThat(
+                    "RecyclerView item count",
+                    view.adapter?.itemCount,
+                    CoreMatchers.equalTo(count)
+                )
+            }
+        }
+    }
+}

app/src/androidTest/java/com/example/dogglers/ButtonTests.kt

@@ -0,0 +1,69 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.click
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.matcher.ViewMatchers.isDisplayed
+import androidx.test.espresso.matcher.ViewMatchers.withId
+import androidx.test.ext.junit.rules.ActivityScenarioRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.MediumTest
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+@MediumTest
+class ButtonTests {
+    @get:Rule
+    var activityRule: ActivityScenarioRule<MainActivity>
+        = ActivityScenarioRule(MainActivity::class.java)
+
+    @Test
+    fun `vertical_list_button_is_displayed`() {
+        onView(withId(R.id.vertical_btn)).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `horizontal_list_button_is_displayed`() {
+        onView(withId(R.id.horizontal_btn)).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `grid_list_button_is_displayed`() {
+        onView(withId(R.id.grid_btn)).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `clicking_vertical_list_button_displays_vertical_list`() {
+        onView(withId(R.id.vertical_btn)).perform(click())
+        onView(withId(R.id.vertical_recycler_view)).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `clicking_horizontal_list_button_displays_horizontal_list`() {
+        onView(withId(R.id.horizontal_btn)).perform(click())
+        onView(withId(R.id.horizontal_recycler_view)).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `clicking_grid_list_button_displays_grid_list`() {
+        onView(withId(R.id.grid_btn)).perform(click())
+        onView(withId(R.id.grid_recycler_view)).check(matches(isDisplayed()))
+    }
+}

app/src/androidTest/java/com/example/dogglers/GridListTests.kt

@@ -0,0 +1,68 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import androidx.recyclerview.widget.RecyclerView
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.swipeUp
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.contrib.RecyclerViewActions.scrollToPosition
+import androidx.test.espresso.matcher.ViewMatchers.*
+import androidx.test.ext.junit.rules.ActivityScenarioRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.example.dogglers.BaseTest.DrawableMatcher.hasItemCount
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+@SmallTest
+class GridListTests : BaseTest() {
+
+    @get:Rule
+    var activityRule: ActivityScenarioRule<GridListActivity>
+            = ActivityScenarioRule(GridListActivity::class.java)
+
+    @Test
+    fun `grid_list_content_at_first_position`() {
+        checkFirstPosition()
+    }
+
+    @Test
+    fun `grid_list_content_on_first_page`() {
+        onView(withText("Nox")).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `grid_list_content_at_last_position`() {
+        onView(withId(R.id.grid_recycler_view))
+            .perform(scrollToPosition<RecyclerView.ViewHolder>(lastPosition))
+        onView(withText("Bella")).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `vertical_scrolling`() {
+        onView(withId(R.id.grid_recycler_view))
+            .perform(swipeUp())
+        onView(withText("Bella")).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `recycler_view_item_count`() {
+        onView(withId(R.id.grid_recycler_view)).check(hasItemCount(6))
+    }
+}

app/src/androidTest/java/com/example/dogglers/HorizontalListTests.kt

@@ -0,0 +1,63 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import androidx.recyclerview.widget.RecyclerView
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.swipeLeft
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.contrib.RecyclerViewActions.scrollToPosition
+import androidx.test.espresso.matcher.ViewMatchers.*
+import androidx.test.ext.junit.rules.ActivityScenarioRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.example.dogglers.BaseTest.DrawableMatcher.hasItemCount
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+@SmallTest
+class HorizontalListTests : BaseTest() {
+
+    @get:Rule
+    var activityRule: ActivityScenarioRule<HorizontalListActivity>
+            = ActivityScenarioRule(HorizontalListActivity::class.java)
+
+    @Test
+    fun `horizontal_scroll_content_at_first_position`() {
+        checkFirstPosition()
+    }
+
+    @Test
+    fun `horizontal_scroll_content_at_last_position`() {
+        onView(withId(R.id.horizontal_recycler_view))
+            .perform(scrollToPosition<RecyclerView.ViewHolder>(lastPosition))
+        onView(withText("Bella")).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `horizontal_scrolling`() {
+        onView(withId(R.id.horizontal_recycler_view))
+            .perform(swipeLeft())
+        onView(withText("Frankie")).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `recycler_view_item_count`() {
+        onView(withId(R.id.horizontal_recycler_view)).check(hasItemCount(6))
+    }
+}

app/src/androidTest/java/com/example/dogglers/VerticalListTests.kt

@@ -0,0 +1,63 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import androidx.recyclerview.widget.RecyclerView
+import androidx.test.espresso.Espresso.onView
+import androidx.test.espresso.action.ViewActions.swipeUp
+import androidx.test.espresso.assertion.ViewAssertions.matches
+import androidx.test.espresso.contrib.RecyclerViewActions.scrollToPosition
+import androidx.test.espresso.matcher.ViewMatchers.*
+import androidx.test.ext.junit.rules.ActivityScenarioRule
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.example.dogglers.BaseTest.DrawableMatcher.hasItemCount
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+@SmallTest
+class VerticalListTests : BaseTest() {
+
+    @get:Rule
+    var activityRule: ActivityScenarioRule<VerticalListActivity>
+            = ActivityScenarioRule(VerticalListActivity::class.java)
+
+    @Test
+    fun `vertical_scroll_content_at_first_position`() {
+        checkFirstPosition()
+    }
+
+    @Test
+    fun `vertical_scroll_content_at_last_position`() {
+        onView(withId(R.id.vertical_recycler_view))
+                .perform(scrollToPosition<RecyclerView.ViewHolder>(lastPosition))
+        onView(withText("Bella")).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `vertical_scrolling`() {
+        onView(withId(R.id.vertical_recycler_view))
+                .perform(swipeUp())
+        onView(withText("Faye")).check(matches(isDisplayed()))
+    }
+
+    @Test
+    fun `recycler_view_item_count`() {
+        onView(withId(R.id.vertical_recycler_view)).check(hasItemCount(6))
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 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.dogglers">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.Dogglers">
+        <activity android:name=".VerticalListActivity">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".MainActivity" />
+        </activity>
+        <activity android:name=".HorizontalListActivity">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".MainActivity" />
+        </activity>
+        <activity android:name=".GridListActivity">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".MainActivity" />
+        </activity>
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/dogglers/GridListActivity.kt

@@ -0,0 +1,44 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import com.example.dogglers.adapter.DogCardAdapter
+import com.example.dogglers.const.Layout
+import com.example.dogglers.databinding.ActivityGridListBinding
+
+class GridListActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityGridListBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityGridListBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.gridRecyclerView.adapter = DogCardAdapter(
+            applicationContext,
+            Layout.GRID
+        )
+
+        // Specify fixed size to improve performance
+        binding.gridRecyclerView.setHasFixedSize(true)
+
+        // Enable up button for backward navigation
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+}

app/src/main/java/com/example/dogglers/HorizontalListActivity.kt

@@ -0,0 +1,44 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import com.example.dogglers.adapter.DogCardAdapter
+import com.example.dogglers.const.Layout
+import com.example.dogglers.databinding.ActivityHorizontalListBinding
+
+class HorizontalListActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityHorizontalListBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHorizontalListBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.horizontalRecyclerView.adapter = DogCardAdapter(
+            applicationContext,
+            Layout.HORIZONTAL
+        )
+
+        // Specify fixed size to improve performance
+        binding.horizontalRecyclerView.setHasFixedSize(true)
+
+        // Enable up button for backward navigation
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+}

app/src/main/java/com/example/dogglers/MainActivity.kt

@@ -0,0 +1,62 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentActivity
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import com.example.dogglers.databinding.ActivityMainBinding
+import com.google.android.material.tabs.TabLayoutMediator
+
+class MainActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityMainBinding
+    private lateinit var listIntent: Intent
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        // Setup view binding
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        // Launch the VerticalListActivity on verticalBtn click
+        binding.verticalBtn.setOnClickListener { launchVertical() }
+
+        // Launch the HorizontalListActivity on horizontalBtn click
+        binding.horizontalBtn.setOnClickListener { launchHorizontal() }
+
+        // Launch the GridListActivity on gridBtn click
+        binding.gridBtn.setOnClickListener { launchGrid() }
+    }
+
+    private fun launchVertical() {
+        listIntent = Intent(this, VerticalListActivity::class.java)
+        startActivity(listIntent)
+    }
+
+    private fun launchHorizontal() {
+        listIntent = Intent(this, HorizontalListActivity::class.java)
+        startActivity(listIntent)
+    }
+
+    private fun launchGrid() {
+        listIntent = Intent(this, GridListActivity::class.java)
+        startActivity(listIntent)
+    }
+}

app/src/main/java/com/example/dogglers/VerticalListActivity.kt

@@ -0,0 +1,44 @@
+/*
+* Copyright (C) 2021 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.dogglers
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import com.example.dogglers.adapter.DogCardAdapter
+import com.example.dogglers.const.Layout
+import com.example.dogglers.databinding.ActivityVerticalListBinding
+
+class VerticalListActivity : AppCompatActivity() {
+
+    private lateinit var binding: ActivityVerticalListBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityVerticalListBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.verticalRecyclerView.adapter = DogCardAdapter(
+            applicationContext,
+            Layout.VERTICAL
+        )
+
+        // Specify fixed size to improve performance
+        binding.verticalRecyclerView.setHasFixedSize(true)
+
+        // Enable up button for backward navigation
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+    }
+}

app/src/main/java/com/example/dogglers/adapter/DogCardAdapter.kt

@@ -0,0 +1,90 @@
+/*
+* Copyright (C) 2021 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.dogglers.adapter
+
+import android.content.Context
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.recyclerview.widget.RecyclerView
+import com.example.dogglers.R
+import com.example.dogglers.const.Layout.GRID
+import com.example.dogglers.data.DataSource
+
+/**
+ * Adapter to inflate the appropriate list item layout and populate the view with information
+ * from the appropriate data source
+ */
+class DogCardAdapter(
+    private val context: Context?,
+    private val layout: Int
+): RecyclerView.Adapter<DogCardAdapter.DogCardViewHolder>() {
+
+    // TODO: Initialize the data using the List found in data/DataSource
+    val data = DataSource.dogs
+
+    /**
+     * Initialize view elements
+     */
+    class DogCardViewHolder(view: View?): RecyclerView.ViewHolder(view!!) {
+        // TODO: Declare and initialize all of the list item UI components
+        val dogImageView: ImageView = view!!.findViewById(R.id.dog_image)
+        val dogNameTextView: TextView = view!!.findViewById(R.id.dog_name)
+        val dogAgeTextView: TextView =  view!!.findViewById(R.id.dog_age)
+        val dogHobbiesTextView: TextView = view!!.findViewById(R.id.dog_hobbies)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DogCardViewHolder {
+        // TODO: Use a conditional to determine the layout type and set it accordingly.
+        //  if the layout variable is Layout.GRID the grid list item should be used. Otherwise the
+        //  the vertical/horizontal list item should be used.
+        val activityLayout =
+            if (layout == GRID) R.layout.grid_list_item
+            else R.layout.vertical_horizontal_list_item
+
+        // TODO Inflate the layout
+        val adapterLayout = LayoutInflater.from(parent.context).inflate(activityLayout, parent, false)
+
+        // TODO: Null should not be passed into the view holder. This should be updated to reflect
+        //  the inflated layout.
+        return DogCardViewHolder(adapterLayout)
+    }
+
+    override fun getItemCount(): Int = data.size // TODO: return the size of the data set instead of 0
+
+    override fun onBindViewHolder(holder: DogCardAdapter.DogCardViewHolder, position: Int) {
+        // TODO: Get the data at the current position
+        val dog = data[position]
+
+        // TODO: Set the image resource for the current dog
+        holder.dogImageView.setImageResource(dog.imageResourceId)
+
+        // TODO: Set the text for the current dog's name
+        holder.dogNameTextView.text = dog.name
+
+        // TODO: Set the text for the current dog's age
+        val resources = context?.resources
+        holder.dogAgeTextView.text = resources?.getString(R.string.dog_age, dog.age)
+
+        // TODO: Set the text for the current dog's hobbies by passing the hobbies to the
+        //  R.string.dog_hobbies string constant.
+        //  Passing an argument to the string resource looks like:
+        //  resources?.getString(R.string.dog_hobbies, dog.hobbies)
+        holder.dogHobbiesTextView.text = resources?.getString(R.string.dog_hobbies, dog.hobbies)
+    }
+}

app/src/main/java/com/example/dogglers/const/Layout.kt

@@ -0,0 +1,27 @@
+/*
+* Copyright (C) 2021 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.dogglers.const
+
+/**
+ * Static object to hold constant values to be associated with a layout.
+ * These values are intended to be passed into the [DogCardAdapter] to determine the type of layout
+ * to inflate.
+ */
+object Layout {
+    val VERTICAL = 1
+    val HORIZONTAL = 2
+    val GRID = 3
+}

app/src/main/java/com/example/dogglers/data/DataSource.kt

@@ -0,0 +1,64 @@
+/*
+* Copyright (C) 2021 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.dogglers.data
+
+import com.example.dogglers.R
+import com.example.dogglers.model.Dog
+
+/**
+ * An object to generate a static list of dogs
+ */
+object DataSource {
+
+    val dogs: List<Dog> = listOf(
+        Dog(
+            R.drawable.tzeitel,
+            "Tzeitel",
+            "7",
+            "sunbathing"
+        ),
+        Dog(
+            R.drawable.leroy,
+            "Leroy",
+            "4",
+            "sleeping in dangerous places"
+        ),
+        Dog(
+            R.drawable.frankie,
+            "Frankie",
+            "2",
+            "stealing socks"
+        ),
+        Dog(
+            R.drawable.nox,
+            "Nox",
+            "8",
+            "meeting new animals"
+        ),
+        Dog(
+            R.drawable.faye,
+            "Faye",
+            "8",
+            "Digging in the garden"
+        ),
+        Dog(
+            R.drawable.bella,
+            "Bella",
+            "14",
+            "Chasing sea foam"
+        )
+    )
+}

app/src/main/java/com/example/dogglers/model/Dog.kt

@@ -0,0 +1,28 @@
+/*
+* Copyright (C) 2021 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.dogglers.model
+
+import androidx.annotation.DrawableRes
+
+/**
+ * A data class to represent the information presented in the dog card
+ */
+data class Dog(
+    @DrawableRes val imageResourceId: Int,
+    val name: String,
+    val age: String,
+    val hobbies: String
+)

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 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.
+  -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+  <group android:scaleX="0.6"
+      android:scaleY="0.6">
+    <path
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app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,191 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 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.
+  -->
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