Add basic fragment structure

Add the boilerplate fragment code.

app/build.gradle

@@ -13,7 +13,9 @@ android {
         versionCode 1
         versionName "1.0"
 
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        buildFeatures {
+            dataBinding true
+        }
     }
 
     buildTypes {
@@ -24,14 +26,46 @@ android {
     }
 }
 
+configurations {
+    ktlint
+}
+
 dependencies {
     implementation fileTree(dir: "libs", include: ["*.jar"])
 
     // Kotlin
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 
-    // Android Support
+    // Support
     implementation 'androidx.core:core-ktx:1.3.1'
     implementation 'androidx.appcompat:appcompat:1.2.0'
-    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.0-rc1'
+
+    // Navigation
+    def navigationVersion = "2.3.0"
+    implementation "androidx.navigation:navigation-fragment-ktx:$navigationVersion"
+    implementation "androidx.navigation:navigation-ui-ktx:$navigationVersion"
+
+    // Lifecycle
+    implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
+
+    // Lint
+    ktlint "com.pinterest:ktlint:0.37.2"
+}
+
+task ktlint(type: JavaExec, group: "verification") {
+    description = "Check Kotlin code style."
+    main = "com.pinterest.ktlint.Main"
+    classpath = configurations.ktlint
+
+    args "src/**/*.kt"
+}
+check.dependsOn ktlint
+
+task ktlintFormat(type: JavaExec, group: "formatting") {
+    description = "Fix Kotlin code style deviations."
+    main = "com.pinterest.ktlint.Main"
+    classpath = configurations.ktlint
+
+    args "-F", "src/**/*.kt"
 }

app/src/main/java/org/oxycblt/auxio/MainActivity.kt

@@ -1,12 +1,15 @@
 package org.oxycblt.auxio
 
-import androidx.appcompat.app.AppCompatActivity
 import android.os.Bundle
+import android.util.Log
+import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        Log.d(this::class.simpleName, "Activity Created.")
     }
 }

app/src/main/java/org/oxycblt/auxio/player/PlayerFragment.kt

@@ -0,0 +1,29 @@
+package org.oxycblt.auxio.player
+
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.fragment.app.Fragment
+import org.oxycblt.auxio.R
+import org.oxycblt.auxio.databinding.FragmentPlayerBinding
+
+class PlayerFragment : Fragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+
+        val binding = DataBindingUtil.inflate<FragmentPlayerBinding>(
+            inflater, R.layout.fragment_player, container, false
+        )
+
+        Log.d(this::class.simpleName, "Fragment created.")
+
+        return binding.root
+    }
+}

app/src/main/res/layout/activity_main.xml

@@ -1,10 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
+<layout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <fragment
+            android:id="@+id/nav_host_fragment"
+            android:name="androidx.navigation.fragment.NavHostFragment"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            app:defaultNavHost="true"
+            app:navGraph="@navigation/nav_main"
+            tools:ignore="FragmentTagUsage" />
+
+    </FrameLayout>
+
+</layout>

app/src/main/res/layout/fragment_player.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/navigation/nav_main.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<navigation
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/nav_main"
+    app:startDestination="@id/playerFragment">
+
+    <fragment
+        android:id="@+id/playerFragment"
+        android:name="org.oxycblt.auxio.player.PlayerFragment"
+        android:label="PlayerFragment" />
+</navigation>

app/src/main/res/values/colors.xml

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <resources>
     <color name="primaryColor">#0d5af5</color>
     <color name="primaryLightColor">#6b86ff</color>

app/src/main/res/values/strings.xml

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <resources>
     <string name="app_name">Auxio</string>
 </resources>

app/src/main/res/values/styles.xml

@@ -1,3 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
 <resources>
     <!-- Base theme -->
     <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">