diff --git a/.kotlin/errors/errors-1746969991873.log b/.kotlin/errors/errors-1746969991873.log
new file mode 100644
index 0000000..1219b50
--- /dev/null
+++ b/.kotlin/errors/errors-1746969991873.log
@@ -0,0 +1,4 @@
+kotlin version: 2.0.21
+error message: The daemon has terminated unexpectedly on startup attempt #1 with error code: 0. The daemon process output:
+    1. Kotlin compile daemon is ready
+
diff --git a/app/build.gradle b/app/build.gradle
index c5cf1b8..e9b2f4d 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,13 +8,13 @@ kotlin {
 }
 
 android {
-    compileSdk 34
+    compileSdk 35
     namespace "otus.gpb.homework.fragments"
 
     defaultConfig {
         applicationId "otus.gpb.homework.fragments"
         minSdk 26
-        targetSdk 34
+        targetSdk 35
         versionCode 1
         versionName "1.0"
 
@@ -34,6 +34,10 @@ android {
     kotlinOptions {
         jvmTarget = '17'
     }
+
+    buildFeatures {
+        viewBinding true
+    }
 }
 
 dependencies {
@@ -42,7 +46,9 @@ 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'
+    implementation("androidx.fragment:fragment-ktx:1.8.6")
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 9604b34..050dd0d 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -12,6 +12,14 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Fragments"
         tools:targetApi="31">
+        <activity
+            android:name=".Task2Activity"
+            android:label="Fragments - Task2"
+            android:exported="false" />
+        <activity
+            android:name=".Task1Activity"
+            android:label="Fragments - Task1"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">
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..6b93890
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt
@@ -0,0 +1,76 @@
+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.ActivityTask1Binding
+import otus.gpb.homework.fragments.databinding.FragmentABinding
+
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentA.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentA : Fragment() {
+    private var _binding: FragmentABinding? = null
+    private val binding get() = _binding!!
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                if (childFragmentManager.backStackEntryCount > 0) {
+                    childFragmentManager.popBackStack()
+                    val currentFragment = childFragmentManager.findFragmentByTag("AA")
+                    if (currentFragment != null && currentFragment.isVisible ) {
+                        binding.btnOpenFragmentAA.visibility = View.VISIBLE
+                    }
+                } else {
+                    isEnabled = false
+                    activity?.onBackPressedDispatcher?.onBackPressed()
+                }
+            }
+        }
+        activity?.onBackPressedDispatcher?.addCallback(callback)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        _binding = FragmentABinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        binding.btnOpenFragmentAA.setOnClickListener {
+            val backgroundColor = ColorGenerator.generateColor()
+            childFragmentManager.beginTransaction()
+                    .replace(R.id.fragmentContainerA, FragmentAA.newInstance(backgroundColor), "AA")
+                    .addToBackStack(null)
+                    .commit()
+            binding.btnOpenFragmentAA.visibility = View.GONE
+        }
+
+    }
+
+
+    companion object {
+        /**
+         * Use this factory method to create a new instance of
+         * this fragment using the provided parameters.
+         *
+         * @return A new instance of fragment FragmentA.
+         */
+        @JvmStatic
+        fun newInstance(): FragmentA = FragmentA()
+    }
+}
\ 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..8c72c50
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt
@@ -0,0 +1,62 @@
+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.FragmentAABinding
+
+private const val BACKGROUND_COLOR = "background_color"
+
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentAA.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentAA : Fragment() {
+
+    private var _binding: FragmentAABinding? = null
+    private val binding get() = _binding!!
+    private var backGroundColor: Int? = null
+
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        backGroundColor?.let { view.setBackgroundColor(backGroundColor!!) }
+        binding.btnOpenFragmentAB.setOnClickListener {
+            val backgroundColor = ColorGenerator.generateColor()
+            parentFragmentManager.beginTransaction()
+                .replace(R.id.fragmentContainerA, FragmentAB.newInstance(backgroundColor), "AB")
+                .addToBackStack(null)
+                .commit()
+        }
+    }
+
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        _binding = FragmentAABinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(backGroundColor: Int) =
+            FragmentAA().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/FragmentAB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt
new file mode 100644
index 0000000..39fd4b2
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt
@@ -0,0 +1,57 @@
+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
+
+// TODO: Rename parameter arguments, choose names that match
+// the fragment initialization parameters, e.g. ARG_ITEM_NUMBER
+private const val BACKGROUND_COLOR = "backGroundColor"
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentAB.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentAB : Fragment() {
+
+    private var backGroundColor: Int? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+
+        }
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        backGroundColor?.let { view.setBackgroundColor(it) }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_a_b, container, false)
+    }
+
+    companion object {
+        /**
+         * Use this factory method to create a new instance of
+         * this fragment using the provided parameters.
+         * @return A new instance of fragment FragmentAB.
+         */
+
+        @JvmStatic
+        fun newInstance(backGroundColor: Int) =
+            FragmentAB().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/FragmentB.kt b/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt
new file mode 100644
index 0000000..6d728b8
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt
@@ -0,0 +1,86 @@
+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.FragmentABinding
+import otus.gpb.homework.fragments.databinding.FragmentBBinding
+
+
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentB.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentB : Fragment(), FragmentBA.ButtonFragmentOnClickListener {
+
+    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)
+        if (!isLandScape) {
+            val childFragment = FragmentBA.newInstance(fragmentBAColor!!)
+            childFragmentManager.beginTransaction()
+                .replace(R.id.container_ba, childFragment)
+                .commit()
+
+            view.postDelayed({ (childFragment as ButtonController).addButton(true) }, 500)
+
+
+        } else {
+            childFragmentManager.beginTransaction()
+                .replace(R.id.container_ba, FragmentBA.newInstance(fragmentBAColor!!))
+                .replace(R.id.container_bb, FragmentBB.newInstance(ColorGenerator.generateColor()))
+                .commit()
+        }
+    }
+
+
+    override fun setButtonFragmentOnClickListener(button: Button) {
+        val fragmentBB = FragmentBB.newInstance(ColorGenerator.generateColor())
+        childFragmentManager.beginTransaction()
+            .add(R.id.container_ba, fragmentBB)
+            .addToBackStack(null)
+            .commit()
+    }
+
+}
+
+interface ButtonController {
+    fun addButton(isActive: Boolean)
+}
\ 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..5b4525e
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt
@@ -0,0 +1,111 @@
+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 androidx.fragment.app.setFragmentResult
+import otus.gpb.homework.fragments.databinding.FragmentAABinding
+import otus.gpb.homework.fragments.databinding.FragmentBABinding
+
+private const val BACKGROUND_COLOR = "background_color"
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentBA.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentBA : Fragment(), ButtonController {
+
+    private var backGroundColor: Int? = null
+    private lateinit var container: FrameLayout
+
+    private var clickListener: ButtonFragmentOnClickListener? = null
+
+    interface ButtonFragmentOnClickListener {
+        fun setButtonFragmentOnClickListener(button: Button)
+    }
+
+    override fun onAttach(context: android.content.Context) {
+        super.onAttach(context)
+        parentFragment?.let {
+            if (it is ButtonFragmentOnClickListener) {
+                clickListener = it
+            }
+        }
+    }
+
+    private var _binding: FragmentBABinding? = null
+    private val binding get() = _binding!!
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+
+        savedInstanceState?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        backGroundColor?.let {
+            outState.putInt(BACKGROUND_COLOR, it)
+        }
+    }
+
+    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) }
+
+        container = view as FrameLayout
+
+
+        parentFragmentManager.setFragmentResultListener("color", this) { _, bundle ->
+            backGroundColor = bundle.getInt("color")
+            view.setBackgroundColor(backGroundColor!!)
+        }
+    }
+
+    companion object {
+        /**
+         * Use this factory method to create a new instance of
+         * this fragment using the provided parameters.
+         *
+         * @param param1 Parameter 1.
+         * @param param2 Parameter 2.
+         * @return A new instance of fragment FragmentBA.
+         */
+        @JvmStatic
+        fun newInstance(backGroundColor: Int) =
+            FragmentBA().apply {
+                arguments = Bundle().apply {
+                    putInt(BACKGROUND_COLOR, backGroundColor)
+                }
+            }
+    }
+
+    override fun addButton(isActive: Boolean) {
+        val button = layoutInflater.inflate(R.layout.button_for_fragment_ba, container, false) as Button
+        button.isEnabled = isActive
+        button.setOnClickListener {
+            clickListener?.setButtonFragmentOnClickListener(button)
+        }
+        container.addView(button)
+    }
+
+}
\ 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..ef9926f
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt
@@ -0,0 +1,85 @@
+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 androidx.core.os.bundleOf
+import otus.gpb.homework.fragments.databinding.FragmentAABinding
+import otus.gpb.homework.fragments.databinding.FragmentBBBinding
+
+
+private const val BACKGROUND_COLOR = "background_color"
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentBB.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentBB : Fragment() {
+
+
+    private var backGroundColor: Int? = null
+
+    private var _binding: FragmentBBBinding? = null
+    private val binding get() = _binding!!
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+
+        savedInstanceState?.let {
+            backGroundColor = it.getInt(BACKGROUND_COLOR)
+        }
+    }
+
+    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) }
+
+        view.findViewById<Button>(R.id.btn_send_color).setOnClickListener {
+            parentFragmentManager.setFragmentResult("color", bundleOf("color" to backGroundColor))
+            backGroundColor = ColorGenerator.generateColor()
+            view.setBackgroundColor(backGroundColor!!)
+            parentFragmentManager.popBackStack()
+        }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        backGroundColor?.let {
+            outState.putInt(BACKGROUND_COLOR, it)
+        }
+    }
+
+    companion object {
+        /**
+         * Use this factory method to create a new instance of
+         * this fragment using the provided parameters.
+         *
+         * @param param1 Parameter 1.
+         * @param param2 Parameter 2.
+         * @return A new instance of fragment FragmentBB.
+         */
+        @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..1046086 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 +1,30 @@
 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.btnToTask1.setOnClickListener {
+            val intent = Intent(this, Task1Activity::class.java)
+            startActivity(intent)
+        }
+
+        binding.btnToTask2.setOnClickListener {
+            val intent = Intent(this, Task2Activity::class.java)
+            startActivity(intent)
+        }
+
+
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/Task1Activity.kt b/app/src/main/java/otus/gpb/homework/fragments/Task1Activity.kt
new file mode 100644
index 0000000..8feb7fb
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/Task1Activity.kt
@@ -0,0 +1,36 @@
+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 Task1Activity : AppCompatActivity() {
+
+    private lateinit var fragmentA: FragmentA
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_task1)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+
+        if (savedInstanceState == null) {
+            fragmentA = FragmentA()
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.container_task1, fragmentA, "A")
+                .commit()
+        } else {
+            fragmentA = supportFragmentManager.findFragmentByTag("fragmentA") as FragmentA
+        }
+
+
+
+
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/fragments/Task2Activity.kt b/app/src/main/java/otus/gpb/homework/fragments/Task2Activity.kt
new file mode 100644
index 0000000..0e4c337
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/fragments/Task2Activity.kt
@@ -0,0 +1,32 @@
+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 Task2Activity : AppCompatActivity() {
+
+    private lateinit var fragmentB: FragmentB
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_task2)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+
+        if (savedInstanceState == null) {
+            fragmentB = FragmentB()
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.container_task2, fragmentB)
+                .commit()
+        } else {
+            fragmentB = supportFragmentManager.findFragmentById(R.id.container_task2) as FragmentB
+        }
+    }
+}
\ 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..73b2928 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -6,13 +6,26 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
+    <Button
+        android:id="@+id/btnToTask1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="Hello World!"
+        android:text="To task1"
+        app:layout_constraintBottom_toTopOf="@id/btnToTask2"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_chainStyle="packed" />
+
+    <Button
+        android:id="@+id/btnToTask2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="To task2"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toBottomOf="@id/btnToTask1" />
+
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_task1.xml b/app/src/main/res/layout/activity_task1.xml
new file mode 100644
index 0000000..3dd2119
--- /dev/null
+++ b/app/src/main/res/layout/activity_task1.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:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".Task1Activity">
+
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/container_task1"
+        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_task2.xml b/app/src/main/res/layout/activity_task2.xml
new file mode 100644
index 0000000..e5dcf08
--- /dev/null
+++ b/app/src/main/res/layout/activity_task2.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout 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"
+    android:orientation="vertical"
+    tools:context=".Task2Activity">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/container_task2"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:background="#9277CD" />
+
+</LinearLayout>
+
diff --git a/app/src/main/res/layout/button_for_fragment_ba.xml b/app/src/main/res/layout/button_for_fragment_ba.xml
new file mode 100644
index 0000000..ccbb49c
--- /dev/null
+++ b/app/src/main/res/layout/button_for_fragment_ba.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Button
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:text="@string/open_fragment_bb"
+    />
\ 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..7f784ab
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a.xml
@@ -0,0 +1,33 @@
+<?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=".FragmentA">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center|bottom"
+        android:background="#60D535"
+        android:padding="10dp"
+        android:text="@string/fragment_a"
+        android:textSize="30sp" />
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/fragmentContainerA"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_margin="60sp"
+        android:background="@color/teal_200"
+        />
+
+
+    <Button
+        android:id="@+id/btnOpenFragmentAA"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="@string/open_fragment_aa" />
+
+</FrameLayout>
\ 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..725403d
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a_a.xml
@@ -0,0 +1,26 @@
+<?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=".FragmentAA">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|center"
+        android:text="fragment    AA"
+        android:textSize="30sp"
+        android:translationY="-40dp"
+        android:background="#8B5CCD"
+        />
+
+    <Button
+        android:id="@+id/btnOpenFragmentAB"
+        android:layout_gravity="center"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:translationY="100dp"
+        android:text="@string/open_fragment_ab"/>
+
+</FrameLayout>
\ 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..b358d41
--- /dev/null
+++ b/app/src/main/res/layout/fragment_a_b.xml
@@ -0,0 +1,17 @@
+<?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=".FragmentAB">
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="bottom|center"
+        android:textSize="30sp"
+        android:background="#C4A1F1"
+        android:translationY="-100dp"
+        android:text="fragment          AB" />
+
+</FrameLayout>
\ 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..5980fe8
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b.xml
@@ -0,0 +1,14 @@
+<?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" />
+
+</LinearLayout>
\ 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..678399e
--- /dev/null
+++ b/app/src/main/res/layout/fragment_b_a.xml
@@ -0,0 +1,19 @@
+<?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:translationY="60dp"
+        android:gravity="center|top"
+        android:text="@string/fragmentba" />
+
+
+
+
+</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..cbd07b5
--- /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:translationY="60dp"
+        android:text="@string/fragmentbb" />
+
+    <Button
+        android:id="@+id/btn_send_color"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="@string/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..c88b190 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,14 @@
 <resources>
     <string name="app_name">Fragments</string>
+    <!-- TODO: Remove or change this placeholder text -->
+    <string name="hello_blank_fragment">Hello blank fragment</string>
+    <string name="open_fragment_aa">open fragment AA</string>
+    <string name="fragment_a">fragment  A</string>
+    <string name="fragment_aa">fragment    AA</string>
+    <string name="open_fragment_ab">open fragment AB</string>
+    <string name="open_fragment_bb">Onen Fragment_BB</string>
+    <string name="fragmentba">FragmentBA</string>
+    <string name="fragmentbb">FragmentBB</string>
+    <string name="send_color">Send Color</string>
+
 </resources>
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index bd20018..3fc7867 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 plugins {
-    id 'com.android.application' version '8.7.2' apply false
-    id 'com.android.library' version '8.7.2' apply false
+    id 'com.android.application' version '8.9.0-rc01' apply false
+    id 'com.android.library' version '8.9.0-rc01' apply false
     id 'org.jetbrains.kotlin.android' version '2.0.21' apply false
 }
 
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 1f1d072..955322e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 #Tue Nov 05 08:41:56 CET 2024
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists