Выполнил домашнее задание Fragments

.gitignore

@@ -20,4 +20,5 @@ run.sh
 *.aab
 output-metadata.json
 /build.properties
-*.hprof
+*.hprof
+*.log

app/build.gradle

@@ -42,6 +42,7 @@ 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:1.8.0'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

app/src/main/AndroidManifest.xml

@@ -12,6 +12,12 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Fragments"
         tools:targetApi="31">
+        <activity
+            android:name=".ActivityB"
+            android:exported="false" />
+        <activity
+            android:name=".ActivityA"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

app/src/main/java/otus/gpb/homework/fragments/ActivityA.kt

@@ -0,0 +1,26 @@
+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 ActivityA : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_a)
+        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
+        }
+        // Add FragmentA to this activity
+        if (savedInstanceState == null) {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragment_container_a, FragmentA())
+                .commit()
+        }
+    }
+}

app/src/main/java/otus/gpb/homework/fragments/ActivityB.kt

@@ -0,0 +1,27 @@
+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 ActivityB : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_b)
+        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
+        }
+
+        // Add FragmentA to this activity
+        if (savedInstanceState == null) {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragment_container_b, FragmentB())
+                .commit()
+        }
+    }
+}

app/src/main/java/otus/gpb/homework/fragments/FragmentA.kt

@@ -0,0 +1,72 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.activity.OnBackPressedCallback
+import androidx.fragment.app.Fragment
+
+class FragmentA : Fragment() {
+    private var callback: OnBackPressedCallback? = null
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(R.layout.fragment_a, container, false)
+        view.findViewById<Button>(R.id.button_open_fragment_aa).setOnClickListener {
+            openFragmentAA()
+        }
+        return view
+    }
+
+    private fun openFragmentAA() {
+        val randomColor = ColorGenerator.generateColor()
+
+        val fragmentAA = FragmentAA.newInstance(randomColor)
+        childFragmentManager.beginTransaction()
+            .replace(R.id.fragment_container_ax, fragmentAA) // Replace with container ID
+            .addToBackStack(null) // Optional: Add to back stack
+            .commit()
+    }
+
+    fun openFragmentAB() {
+        val randomColor = ColorGenerator.generateColor()
+
+        val fragmentAB = FragmentAB.newInstance(randomColor)
+        childFragmentManager.beginTransaction()
+            .replace(R.id.fragment_container_ax, fragmentAB) // Replace with container ID
+            .addToBackStack(null) // Optional: Add to back stack
+            .commit()
+    }
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+
+        callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                // Реализуйте обработку нажатия на кнопку “Назад”, используя
+                // OnBackPressedDispatcher, таким образом, что по нажатию
+                // из стека фрагментов удаляется один фрагмент.
+                // После того как размер стека = 1, закрывайте активити.
+                if (childFragmentManager.backStackEntryCount > 1) {
+                    childFragmentManager.popBackStack()
+                } else {
+                    isEnabled = false
+                    requireActivity().onBackPressedDispatcher.onBackPressed()
+                }
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(callback!!)
+    }
+
+    override fun onDetach() {
+        super.onDetach()
+        callback?.remove() // Удаляем обработчик при отсоединении фрагмента
+        callback = null
+    }
+
+}

app/src/main/java/otus/gpb/homework/fragments/FragmentAA.kt

@@ -0,0 +1,44 @@
+package otus.gpb.homework.fragments
+
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.fragment.app.Fragment
+
+class FragmentAA : Fragment() {
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+
+        val view = inflater.inflate(R.layout.fragment_aa, container, false)
+
+        val color = arguments?.getInt(ARG_COLOR) ?: Color.WHITE
+        view.setBackgroundColor(color)
+
+        view.findViewById<Button>(R.id.button_open_fragment_ab).setOnClickListener(
+            {
+                if (parentFragment is FragmentA)
+                        (parentFragment as FragmentA).openFragmentAB()
+            }
+        )
+
+        return view
+    }
+
+    companion object {
+        private const val ARG_COLOR = "color"
+
+        fun newInstance(color: Int): FragmentAA {
+            val fragment = FragmentAA()
+            val args = Bundle().apply {
+                putInt(ARG_COLOR, color)
+            }
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}

app/src/main/java/otus/gpb/homework/fragments/FragmentAB.kt

@@ -0,0 +1,36 @@
+package otus.gpb.homework.fragments
+
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+
+class FragmentAB : Fragment() {
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+
+        val view = inflater.inflate(R.layout.fragment_ab, container, false)
+
+        val color = arguments?.getInt(ARG_COLOR) ?: Color.WHITE
+        view.setBackgroundColor(color)
+
+        return view
+    }
+
+    companion object {
+        private const val ARG_COLOR = "color"
+
+        fun newInstance(color: Int): FragmentAB {
+            val fragment = FragmentAB()
+            val args = Bundle().apply {
+                putInt(ARG_COLOR, color)
+            }
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}

app/src/main/java/otus/gpb/homework/fragments/FragmentB.kt

@@ -0,0 +1,40 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+
+class FragmentB : Fragment() {
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val view = inflater.inflate(R.layout.fragment_b, container, false)
+        val landscapeLayout = view.findViewById<View>(R.id.landscape_layout)
+        val fragmentContainer = view.findViewById<View>(R.id.fragment_container)
+        if (resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            // Ландшафтная ориентация: оба фрагмента на экране
+            landscapeLayout.visibility = View.VISIBLE
+            fragmentContainer.visibility = View.GONE
+
+            childFragmentManager.beginTransaction()
+                .replace(R.id.fragment_container_ba, FragmentBA())
+                .replace(R.id.fragment_container_bb, FragmentBB())
+                .commit()
+        }
+        else {
+            // Портретная ориентация: только FragmentBB
+            landscapeLayout.visibility = View.GONE
+            fragmentContainer.visibility = View.VISIBLE
+
+            childFragmentManager.beginTransaction()
+                .replace(R.id.fragment_container, FragmentBA())
+                .addToBackStack(null)
+                .commit()
+        }
+        return view
+    }
+}

app/src/main/java/otus/gpb/homework/fragments/FragmentBA.kt

@@ -0,0 +1,55 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.graphics.Color
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.fragment.app.Fragment
+
+class FragmentBA : Fragment() {
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+
+        val view = inflater.inflate(R.layout.fragment_ba, container, false)
+
+        val color = arguments?.getInt(ARG_COLOR) ?: Color.WHITE
+        view.setBackgroundColor(color)
+
+        val openFragmentBB = view.findViewById<Button>(R.id.open_fragment_bb)
+
+        // Слушатель для получения цвета от FragmentBB
+        parentFragmentManager.setFragmentResultListener(COLOR_REQUEST, this) { _, bundle ->
+            val bgColor: Int = bundle.getInt(ARG_COLOR, Color.WHITE)
+            view.setBackgroundColor(bgColor) // Красим фон в полученный цвет
+        }
+
+        if (resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            openFragmentBB.visibility = View.GONE
+
+
+        } else {
+            openFragmentBB.apply {
+                visibility = View.VISIBLE
+                setOnClickListener {
+
+                    parentFragmentManager.beginTransaction()
+                        .replace(R.id.fragment_container
+                            , FragmentBB.newInstance(ColorGenerator.generateColor()))
+                        .addToBackStack(null) // Добавляем в стек, чтобы вернуться назад
+                        .commit()
+                }
+            }
+        }
+        return view
+    }
+
+    companion object {
+        private const val ARG_COLOR = "color"
+        private const val COLOR_REQUEST = "colorRequest"
+    }
+}

app/src/main/java/otus/gpb/homework/fragments/FragmentBB.kt

@@ -0,0 +1,52 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.fragment.app.Fragment
+
+class FragmentBB : Fragment() {
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+
+        val view = inflater.inflate(R.layout.fragment_bb, container, false)
+
+        // Кнопка для генерации цвета и возврата результата в FragmentBA
+        view.findViewById<Button>(R.id.send_color).setOnClickListener {
+            val randomColor = ColorGenerator.generateColor()
+
+            if (resources.configuration.orientation != Configuration.ORIENTATION_LANDSCAPE) {
+                // Закрываем текущий фрагмент
+                parentFragmentManager.popBackStack()
+            }
+
+            // Передаем результат обратно в FragmentBA
+            val result = Bundle()
+            result.putInt(ARG_COLOR, randomColor)
+            parentFragmentManager.setFragmentResult(COLOR_REQUEST, result)
+        }
+
+        return view
+    }
+
+
+
+    companion object {
+        private const val ARG_COLOR = "color"
+        private const val COLOR_REQUEST = "colorRequest"
+
+        fun newInstance(color: Int): FragmentBB {
+            val fragment = FragmentBB()
+            val args = Bundle().apply {
+                putInt(ARG_COLOR, color)
+            }
+            fragment.arguments = args
+            return fragment
+        }
+    }
+}