From 4e4920fd0b1a15d6c55898ef8a90f86bc553ed1f Mon Sep 17 00:00:00 2001
From: iamwhoiam0 <gamzatgasanov2337@mail.ru>
Date: Sat, 28 Jun 2025 16:08:36 +0300
Subject: [PATCH] homework is done

---
 app/build.gradle                              |  6 +-
 app/src/main/AndroidManifest.xml              |  6 ++
 .../gpb/homework/fragments/ActivityOne.kt     | 23 +++++
 .../gpb/homework/fragments/ActivityTwo.kt     | 23 +++++
 .../otus/gpb/homework/fragments/FragmentA.kt  | 57 ++++++++++++
 .../otus/gpb/homework/fragments/FragmentAA.kt | 55 ++++++++++++
 .../otus/gpb/homework/fragments/FragmentAB.kt | 45 ++++++++++
 .../otus/gpb/homework/fragments/FragmentB.kt  | 89 +++++++++++++++++++
 .../otus/gpb/homework/fragments/FragmentBA.kt | 75 ++++++++++++++++
 .../otus/gpb/homework/fragments/FragmentBB.kt | 72 +++++++++++++++
 .../gpb/homework/fragments/MainActivity.kt    | 16 +++-
 app/src/main/res/layout-land/fragment_b.xml   | 21 +++++
 app/src/main/res/layout/activity_main.xml     | 22 ++++-
 app/src/main/res/layout/activity_one.xml      | 13 +++
 app/src/main/res/layout/activity_two.xml      | 13 +++
 app/src/main/res/layout/fragment_a.xml        | 39 ++++++++
 app/src/main/res/layout/fragment_a_a.xml      | 29 ++++++
 app/src/main/res/layout/fragment_a_b.xml      | 18 ++++
 app/src/main/res/layout/fragment_b.xml        | 13 +++
 app/src/main/res/layout/fragment_b_a.xml      | 25 ++++++
 app/src/main/res/layout/fragment_b_b.xml      | 24 +++++
 app/src/main/res/values-land/booleans.xml     |  4 +
 app/src/main/res/values/booleans.xml          |  4 +
 app/src/main/res/values/strings.xml           |  2 +
 24 files changed, 688 insertions(+), 6 deletions(-)
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/ActivityOne.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/ActivityTwo.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
 create mode 100644 app/src/main/res/layout-land/fragment_b.xml
 create mode 100644 app/src/main/res/layout/activity_one.xml
 create mode 100644 app/src/main/res/layout/activity_two.xml
 create mode 100644 app/src/main/res/layout/fragment_a.xml
 create mode 100644 app/src/main/res/layout/fragment_a_a.xml
 create mode 100644 app/src/main/res/layout/fragment_a_b.xml
 create mode 100644 app/src/main/res/layout/fragment_b.xml
 create mode 100644 app/src/main/res/layout/fragment_b_a.xml
 create mode 100644 app/src/main/res/layout/fragment_b_b.xml
 create mode 100644 app/src/main/res/values-land/booleans.xml
 create mode 100644 app/src/main/res/values/booleans.xml

diff --git a/app/build.gradle b/app/build.gradle
index c5cf1b8..64ccb51 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,7 +8,7 @@ kotlin {
 }
 
 android {
-    compileSdk 34
+    compileSdk 35
     namespace "otus.gpb.homework.fragments"
 
     defaultConfig {
@@ -34,6 +34,9 @@ android {
     kotlinOptions {
         jvmTarget = '17'
     }
+    viewBinding {
+        enabled = true
+    }
 }
 
 dependencies {
@@ -42,6 +45,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'com.google.android.material:material:1.6.1'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
+    implementation 'androidx.activity:activity:1.10.1'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9604b34..0e03e51 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -12,6 +12,12 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Fragments"
         tools:targetApi="31">
+        <activity
+            android:name=".ActivityOne"
+            android:exported="false" />
+        <activity
+            android:name=".ActivityTwo"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ActivityOne.kt b/app/src/main/java/otus/gpb/homework/fragments/ActivityOne.kt
new file mode 100644
index 0000000..5c27090
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ActivityOne.kt
@@ -0,0 +1,23 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityOne : AppCompatActivity() {
+
+    private lateinit var fragmentA: FragmentA
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_one)
+
+        fragmentA = FragmentA()
+        supportFragmentManager.beginTransaction()
+            .replace(R.id.fragmentAContainer, fragmentA)
+            .commit()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/ActivityTwo.kt b/app/src/main/java/otus/gpb/homework/fragments/ActivityTwo.kt
new file mode 100644
index 0000000..e6ecb26
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/ActivityTwo.kt
@@ -0,0 +1,23 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityTwo : AppCompatActivity() {
+
+    private lateinit var fragmentB: FragmentB
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_two)
+
+        fragmentB = FragmentB()
+        supportFragmentManager.beginTransaction()
+            .replace(R.id.fragmentBContainer, fragmentB)
+            .commit()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
new file mode 100644
index 0000000..100366f
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
@@ -0,0 +1,57 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
+import otus.gpb.homework.fragments.databinding.FragmentABinding
+
+class FragmentA : Fragment() {
+
+    private lateinit var fragmentAA: FragmentAA
+    private lateinit var binding: FragmentABinding
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                if (childFragmentManager.backStackEntryCount > 0) {
+                    childFragmentManager.popBackStack()
+                } else {
+                    isEnabled = false
+                    @Suppress("DEPRECATION")
+                    requireActivity().onBackPressed()
+                }
+            }
+        }
+
+        requireActivity().onBackPressedDispatcher.addCallback(callback)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        // Inflate the layout for this fragment
+        binding = FragmentABinding.inflate(layoutInflater)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        binding.transitionToFragmentAA.setOnClickListener {
+            val generatedColor = ColorGenerator.generateColor()
+            fragmentAA = FragmentAA.newInstance(generatedColor)
+            childFragmentManager.beginTransaction()
+                .replace(R.id.fragment_a_container, fragmentAA)
+                .addToBackStack(null)
+                .commit()
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt
new file mode 100644
index 0000000..d66f312
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt
@@ -0,0 +1,55 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.util.Log
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+
+class FragmentAA : Fragment() {
+
+    private var randomColor: Int = 0
+    private lateinit var fragmentAB: FragmentAB
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            randomColor = it.getInt(ARG_RAND_COLOR)
+        }
+        Log.i("myColor", randomColor.toString())
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_a_a, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        view.setBackgroundColor(randomColor)
+        fragmentAB = FragmentAB.newInstance(ColorGenerator.generateColor())
+        view.findViewById<Button>(R.id.transitionToFragmentAB).setOnClickListener {
+            parentFragmentManager
+                .beginTransaction()
+                .replace(R.id.fragment_a_container, fragmentAB)
+                .addToBackStack(null)
+                .commit()
+        }
+    }
+
+    companion object {
+        private const val ARG_RAND_COLOR = "random_color"
+        fun newInstance(value: Int): FragmentAA {
+            val fragment = FragmentAA()
+            val args = Bundle()
+            args.putInt(ARG_RAND_COLOR, value)
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt
new file mode 100644
index 0000000..33e76ec
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt
@@ -0,0 +1,45 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.util.Log
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import otus.gpb.homework.fragments.FragmentAA.Companion
+
+class FragmentAB : Fragment() {
+
+    private var randomColor: Int = 0
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            randomColor = it.getInt(ARG_RAND_COLOR)
+        }
+        Log.i("myColor", randomColor.toString())
+    }
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_a_b, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        view.setBackgroundColor(randomColor)
+    }
+
+    companion object {
+        private const val ARG_RAND_COLOR = "random_color"
+        fun newInstance(value: Int): FragmentAB {
+            val fragment = FragmentAB()
+            val args = Bundle()
+            args.putInt(ARG_RAND_COLOR, value)
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt
new file mode 100644
index 0000000..a2c866c
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt
@@ -0,0 +1,89 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import otus.gpb.homework.fragments.databinding.FragmentBBinding
+
+class FragmentB : Fragment() {
+
+    private var isLandScape = false
+    private var fragmentBAColor: Int? = null
+
+    private var _binding: FragmentBBinding? = null
+    private val binding get() = _binding!!
+
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        isLandScape = resources.getBoolean(R.bool.isLandscape)
+        fragmentBAColor = savedInstanceState?.getInt("fragmentBA_color")
+        if (fragmentBAColor == null) {
+            fragmentBAColor = ColorGenerator.generateColor()
+        }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        fragmentBAColor?.let {
+            outState.putInt("fragmentBA_color", it)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentBBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        view.setBackgroundColor(fragmentBAColor!!)
+
+        childFragmentManager.setFragmentResultListener("openFragmentBB", this) { _, _ ->
+            childFragmentManager
+                .beginTransaction()
+                .replace(R.id.fragmentBContainer, FragmentBB.newInstance(ColorGenerator.generateColor()))
+                .addToBackStack(null)
+                .commit()
+        }
+        childFragmentManager.setFragmentResultListener("openFragmentBA", this) { _, bundle ->
+            childFragmentManager
+                .beginTransaction()
+                .replace(R.id.fragmentBContainer, FragmentBA.newInstance(bundle.getInt("BACKGROUND_COLOR")))
+                .addToBackStack(null)
+                .commit()
+        }
+
+        childFragmentManager.setFragmentResultListener("openLandFragmentBA", this) { _, bundle ->
+            childFragmentManager
+                .beginTransaction()
+                .replace(R.id.container_ba, FragmentBA.newInstance(bundle.getInt("BACKGROUND_COLOR")))
+                .addToBackStack(null)
+                .commit()
+        }
+
+        if (savedInstanceState == null) {
+            if (!isLandScape) {
+                val childFragment = FragmentBA.newInstance(fragmentBAColor!!)
+                childFragmentManager
+                    .beginTransaction()
+                    .replace(R.id.fragmentBContainer, childFragment)
+                    .commit()
+
+            } else {
+                childFragmentManager
+                    .beginTransaction()
+                    .replace(R.id.container_ba, FragmentBA.newInstance(fragmentBAColor!!))
+                    .replace(R.id.container_bb, FragmentBB.newInstance(ColorGenerator.generateColor()))
+                    .commit()
+            }
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
new file mode 100644
index 0000000..82c159b
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
@@ -0,0 +1,75 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import android.widget.FrameLayout
+import otus.gpb.homework.fragments.databinding.FragmentBABinding
+
+private const val BACKGROUND_COLOR = "background_color"
+
+class FragmentBA : Fragment() {
+
+    private var backGroundColor: Int? = null
+
+    private var _binding: FragmentBABinding? = null
+    private val binding get() = _binding!!
+
+    private var isLandScape = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+
+        savedInstanceState?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+        isLandScape = resources.getBoolean(R.bool.isLandscape)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentBABinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        backGroundColor?.let { view.setBackgroundColor(it) }
+
+        binding.transitionToFragmentBB.visibility = if (isLandScape) View.GONE else View.VISIBLE
+
+        parentFragmentManager.setFragmentResultListener("color", this) { _, bundle ->
+            backGroundColor = bundle.getInt("color")
+            view.setBackgroundColor(backGroundColor!!)
+        }
+
+        binding.transitionToFragmentBB.setOnClickListener{
+            parentFragmentManager.setFragmentResult("openFragmentBB", Bundle.EMPTY)
+        }
+    }
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        backGroundColor?.let {
+            outState.putInt(BACKGROUND_COLOR, it)
+        }
+    }
+
+    companion object {
+
+        @JvmStatic
+        fun newInstance(backGroundColor: Int) =
+            FragmentBA().apply {
+                arguments = Bundle().apply {
+                    putInt(BACKGROUND_COLOR, backGroundColor)
+                }
+            }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
new file mode 100644
index 0000000..416b515
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
@@ -0,0 +1,72 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import otus.gpb.homework.fragments.databinding.FragmentBABinding
+import otus.gpb.homework.fragments.databinding.FragmentBBBinding
+
+private const val BACKGROUND_COLOR = "background_color"
+
+class FragmentBB : Fragment() {
+
+    private var backGroundColor: Int? = null
+
+    private var _binding: FragmentBBBinding? = null
+    private val binding get() = _binding!!
+
+    private var isLandScape = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+
+        savedInstanceState?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+
+        isLandScape = resources.getBoolean(R.bool.isLandscape)
+    }
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View {
+        _binding = FragmentBBBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        backGroundColor?.let { view.setBackgroundColor(it) }
+
+        parentFragmentManager.setFragmentResultListener("color", this) { _, bundle ->
+            backGroundColor = bundle.getInt("color")
+            view.setBackgroundColor(backGroundColor!!)
+        }
+
+        val bundle = Bundle()
+        bundle.putInt("BACKGROUND_COLOR", backGroundColor!!)
+        binding.transitionToFragmentBA.setOnClickListener{
+            if (isLandScape){
+                parentFragmentManager.setFragmentResult("openLandFragmentBA", bundle)
+            }else{
+                parentFragmentManager.setFragmentResult("openFragmentBA", bundle)
+            }
+        }
+    }
+
+    companion object {
+
+        @JvmStatic
+        fun newInstance(backGroundColor: Int) =
+            FragmentBB().apply {
+                arguments = Bundle().apply {
+                    putInt(BACKGROUND_COLOR, backGroundColor)
+                }
+            }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt b/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
index 5e89c44..5aeca3d 100644
--- a/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
+++ b/app/src/main/java/otus/gpb/homework/fragments/MainActivity.kt
@@ -1,12 +1,26 @@
 package otus.gpb.homework.fragments
 
+import android.content.Intent
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
+import otus.gpb.homework.fragments.databinding.ActivityMainBinding
+
 
 class MainActivity : AppCompatActivity() {
 
+    private lateinit var binding: ActivityMainBinding
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_main)
+        binding = ActivityMainBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        binding.transitionToActivityOne.setOnClickListener {
+            val intent = Intent(this, ActivityOne::class.java)
+            startActivity(intent)
+        }
+
+        binding.transitionToActivityTwo.setOnClickListener {
+            val intent = Intent(this, ActivityTwo::class.java)
+            startActivity(intent)
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout-land/fragment_b.xml b/app/src/main/res/layout-land/fragment_b.xml
new file mode 100644
index 0000000..0216459
--- /dev/null
+++ b/app/src/main/res/layout-land/fragment_b.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/container_ba"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        tools:background="#9277CD" />
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/container_bb"
+        android:layout_width="0dp"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        tools:background="#74BB66" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 17eab17..a77e75c 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -6,13 +6,27 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/transitionToActivityOne"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
-        app:layout_constraintBottom_toBottomOf="parent"
+        android:text="Activity One"
+        android:textAllCaps="false"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toTopOf="@id/transitionToActivityTwo"
+        />
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/transitionToActivityTwo"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Activity Two"
+        android:textAllCaps="false"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/transitionToActivityOne"
+        app:layout_constraintBottom_toBottomOf="parent"
+        />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_one.xml b/app/src/main/res/layout/activity_one.xml
new file mode 100644
index 0000000..7f19365
--- /dev/null
+++ b/app/src/main/res/layout/activity_one.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ActivityOne">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/fragmentAContainer"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_two.xml b/app/src/main/res/layout/activity_two.xml
new file mode 100644
index 0000000..6cc8a2f
--- /dev/null
+++ b/app/src/main/res/layout/activity_two.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".ActivityTwo">
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/fragmentBContainer"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_a.xml b/app/src/main/res/layout/fragment_a.xml
new file mode 100644
index 0000000..fc2147f
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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=".FragmentA">
+
+    <TextView
+        android:id="@+id/fragment_a_name"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Fragment A"
+        android:textAlignment="center"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/fragment_a_container"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_margin="10dp"
+        app:layout_constraintBottom_toTopOf="@id/transitionToFragmentAA"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/fragment_a_name" />
+
+    <Button
+        android:id="@+id/transitionToFragmentAA"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="FragmentAA"
+        android:layout_marginBottom="20dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/fragment_a_container" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_a_a.xml b/app/src/main/res/layout/fragment_a_a.xml
new file mode 100644
index 0000000..3cf9396
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a_a.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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=".FragmentAA">
+
+    <TextView
+        android:id="@+id/fragment_aa_name"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Fragment AA"
+        android:textAlignment="center"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/transitionToFragmentAB"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="fragment AB"
+        android:layout_marginBottom="20dp"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_a_b.xml b/app/src/main/res/layout/fragment_a_b.xml
new file mode 100644
index 0000000..f9aff7f
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a_b.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout 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=".FragmentAB">
+
+    <TextView
+        android:id="@+id/fragment_aa_name"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Fragment AB"
+        android:textAlignment="center"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout >
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_b.xml b/app/src/main/res/layout/fragment_b.xml
new file mode 100644
index 0000000..6e40a3e
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentB">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/fragmentBContainer"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_b_a.xml b/app/src/main/res/layout/fragment_b_a.xml
new file mode 100644
index 0000000..17cba95
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b_a.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentBA">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="30sp"
+        android:layout_marginTop="60dp"
+        android:gravity="center|top"
+        android:text="Fragment BA" />
+
+
+    <Button
+        android:id="@+id/transitionToFragmentBB"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="Open fragmentBB"
+        />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/fragment_b_b.xml b/app/src/main/res/layout/fragment_b_b.xml
new file mode 100644
index 0000000..2600eb2
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b_b.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".FragmentBB">
+
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="30sp"
+        android:gravity="center|top"
+        android:layout_marginTop="60dp"
+        android:text="Fragment BB" />
+
+    <Button
+        android:id="@+id/transitionToFragmentBA"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="send color"
+        />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values-land/booleans.xml b/app/src/main/res/values-land/booleans.xml
new file mode 100644
index 0000000..fc1d851
--- /dev/null
+++ b/app/src/main/res/values-land/booleans.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <bool name="isLandscape">true</bool>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/booleans.xml b/app/src/main/res/values/booleans.xml
new file mode 100644
index 0000000..214d589
--- /dev/null
+++ b/app/src/main/res/values/booleans.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <bool name="isLandscape">false</bool>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 34277aa..69e7f01 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,5 @@
 <resources>
     <string name="app_name">Fragments</string>
+    <!-- TODO: Remove or change this placeholder text -->
+    <string name="hello_blank_fragment">Hello blank fragment</string>
 </resources>
\ No newline at end of file