Сделал ДЗ № 11

app/build.gradle

@@ -4,17 +4,17 @@ plugins {
 }
 
 kotlin {
-    jvmToolchain(17)
+    jvmToolchain(20)
 }
 
 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"
 
@@ -28,21 +28,23 @@ android {
         }
     }
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_17
-        targetCompatibility JavaVersion.VERSION_17
+        sourceCompatibility JavaVersion.VERSION_20
+        targetCompatibility JavaVersion.VERSION_20
     }
     kotlinOptions {
-        jvmTarget = '17'
+        jvmTarget = '20'
     }
 }
 
 dependencies {
 
-    implementation 'androidx.core:core-ktx:1.7.0'
-    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.core:core-ktx:1.16.0"
+    implementation 'androidx.appcompat:appcompat:1.7.0'
+    implementation 'com.google.android.material:material:1.12.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.2.1'
+    implementation "androidx.fragment:fragment-ktx:1.8.6"
     testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation 'androidx.test.ext:junit:1.2.1'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'
+
 }

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

@@ -0,0 +1,14 @@
+package otus.gpb.homework.fragments
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+
+class ColorViewModel : ViewModel() {
+    private val _currentColor = MutableLiveData<Int>()
+    val currentColor: LiveData<Int> get() = _currentColor
+
+    fun setColor(color: Int) {
+        _currentColor.value = color
+    }
+}

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

@@ -0,0 +1,6 @@
+package otus.gpb.homework.fragments
+
+const val RESULT_KEY_A = "key_color_a"
+const val RESULT_KEY_A_A = "key_color_a_a"
+
+const val RESULT_BUNDLE = "bundle"

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

@@ -0,0 +1,63 @@
+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.core.os.bundleOf
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+
+class FragmentA : Fragment() {
+
+    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? {
+        return inflater.inflate(R.layout.fragment_a, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        view.findViewById<Button>(R.id.btn_open_fragment_aa).setOnClickListener {
+            val backgroundColor = ColorGenerator.generateColor()
+
+            childFragmentManager.setFragmentResult(
+                RESULT_KEY_A,
+                bundleOf(RESULT_BUNDLE to backgroundColor)
+            )
+            childFragmentManager.popBackStackImmediate(
+                "fragmentA",
+                FragmentManager.POP_BACK_STACK_INCLUSIVE
+            )
+
+            childFragmentManager.beginTransaction()
+                .replace(R.id.fragment_view_container_a, FragmentAA())
+                .addToBackStack("fragmentA")
+                .commit()
+        }
+    }
+}

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

@@ -0,0 +1,53 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+import androidx.core.os.bundleOf
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.setFragmentResultListener
+
+class FragmentAA : Fragment() {
+    private val SAVED_COLOR = "saved_color"
+    private var savedBackgroundColor: Int = ColorGenerator.generateColor()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        savedBackgroundColor = savedInstanceState?.getInt(SAVED_COLOR) ?: savedBackgroundColor
+        return inflater.inflate(R.layout.fragment_aa, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        view.setBackgroundColor(savedBackgroundColor)
+
+        view.findViewById<Button>(R.id.btn_open_fragment_ab).setOnClickListener {
+            val backgroundColor = ColorGenerator.generateColor()
+
+            parentFragmentManager.beginTransaction()
+                .replace(R.id.fragment_view_container_a, FragmentAB())
+                .addToBackStack("fragmentAB")
+                .commit()
+
+            parentFragmentManager.setFragmentResult(
+                RESULT_KEY_A_A,
+                bundleOf(RESULT_BUNDLE to backgroundColor)
+            )
+        }
+
+        setFragmentResultListener(RESULT_KEY_A) { _, bundle ->
+            savedBackgroundColor = bundle.getInt(RESULT_BUNDLE)
+            view.setBackgroundColor(savedBackgroundColor)
+        }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        outState.putInt(SAVED_COLOR, savedBackgroundColor)
+    }
+}

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

@@ -0,0 +1,26 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.setFragmentResultListener
+
+class FragmentAB : Fragment() {
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_ab, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        setFragmentResultListener(RESULT_KEY_A_A) { _, bundle ->
+            view.setBackgroundColor(bundle.getInt(RESULT_BUNDLE))
+        }
+    }
+}

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

@@ -0,0 +1,59 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.viewModels
+
+
+class FragmentB : Fragment() {
+    private val viewModel: ColorViewModel by viewModels()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(
+            R.layout.fragment_b,
+            container,
+            false
+        )
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        viewModel.currentColor.observe(viewLifecycleOwner) { color ->
+            updateFragments(color)
+        }
+        if (resources.getBoolean(R.bool.isLandscape)) {
+            showLandscape()
+        } else {
+            showPortrait()
+        }
+        super.onViewCreated(view, savedInstanceState)
+    }
+
+    private fun showLandscape() {
+        childFragmentManager.beginTransaction()
+            .replace(R.id.fragment_view_container_ba, FragmentBA())
+            .replace(R.id.fragment_view_container_bb, FragmentBB())
+            .commit()
+    }
+
+    private fun showPortrait() {
+        childFragmentManager.beginTransaction()
+            .addToBackStack(null)
+            .replace(R.id.fragment_view_container_ba, FragmentBA())
+            .commit()
+    }
+
+    private fun updateFragments(color: Int) {
+        val fragmentBA = childFragmentManager.findFragmentById(R.id.fragment_view_container_ba)
+        if (fragmentBA is FragmentBA) {
+            fragmentBA.updateColor(color)
+        }
+    }
+
+}

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

@@ -0,0 +1,42 @@
+package otus.gpb.homework.fragments
+
+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
+import androidx.fragment.app.activityViewModels
+
+class FragmentBA : Fragment() {
+    private val parentViewModel: ColorViewModel by activityViewModels()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_ba, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        parentViewModel.currentColor.observe(viewLifecycleOwner) { color ->
+            view.setBackgroundColor(color)
+        }
+
+        if (!requireContext().isLandscape()) {
+            view.findViewById<Button>(R.id.btn_open_fragment_bb).setOnClickListener {
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.fragment_view_container_ba, FragmentBB())
+                    .addToBackStack(null)
+                    .commit()
+            }
+        }
+    }
+
+    fun updateColor(color: Int) {
+        view?.setBackgroundColor(color)
+    }
+}

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

@@ -0,0 +1,34 @@
+package otus.gpb.homework.fragments
+
+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
+import androidx.fragment.app.activityViewModels
+
+class FragmentBB : Fragment() {
+    private val parentViewModel: ColorViewModel by activityViewModels()
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_bb, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        view.findViewById<Button>(R.id.btn_send_color_to_ba).setOnClickListener {
+            val backgroundColor = ColorGenerator.generateColor()
+            parentViewModel.setColor(backgroundColor)
+
+            if (!requireContext().isLandscape()) {
+                parentFragmentManager.popBackStack()
+            }
+        }
+    }
+}

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

@@ -0,0 +1,7 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.content.res.Configuration
+
+fun Context.isLandscape() =
+    resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE