Homework 11

app/build.gradle

@@ -8,7 +8,7 @@ kotlin {
 }
 
 android {
-    compileSdk 34
+    compileSdk 35
     namespace "otus.gpb.homework.fragments"
 
     defaultConfig {
@@ -34,14 +34,19 @@ android {
     kotlinOptions {
         jvmTarget = '17'
     }
+
+    buildFeatures {
+        viewBinding = true
+    }
 }
 
 dependencies {
-
+    implementation 'androidx.fragment:fragment-ktx:1.6.2'
     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.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'

app/src/main/AndroidManifest.xml

@@ -12,6 +12,9 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Fragments"
         tools:targetApi="31">
+        <activity
+            android:name=".ActivityB"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

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

@@ -0,0 +1,20 @@
+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() {
+    private val isPortrait: Boolean get() = resources.getBoolean(R.bool.isPortrait)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_b)
+
+        supportFragmentManager.beginTransaction()
+            .replace(R.id.container_fragment_b, FragmentB.newInstance())
+            .commit()
+    }
+}

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

@@ -0,0 +1,56 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.content.Intent
+import android.graphics.Color
+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.activity.OnBackPressedCallback
+
+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.setBackgroundColor(Color.WHITE)
+
+        view.findViewById<Button>(R.id.button).setOnClickListener {
+            childFragmentManager.beginTransaction()
+                .replace(R.id.fragment_view_container_a, FragmentAA.newInstance(ColorGenerator.generateColor()))
+                .addToBackStack("fragment_aa")
+                .commit()
+        }
+    }
+    companion object {
+        @JvmStatic
+        fun newInstance() = FragmentA()
+    }
+}

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

@@ -0,0 +1,45 @@
+package otus.gpb.homework.fragments
+
+import android.graphics.Color
+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
+
+private const val FRAG_AA_COLOR = "frag_aa_color"
+
+class FragmentAA : Fragment() {
+    private val fragAAColor: Int by lazy { arguments?.getInt(FRAG_AA_COLOR, 0) ?: 0 }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_a_a, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        view.setBackgroundColor(fragAAColor)
+
+        view.findViewById<Button>(R.id.button).setOnClickListener {
+            parentFragmentManager.beginTransaction()
+                .add(R.id.fragment_view_container_ab, FragmentAB.newInstance(ColorGenerator.generateColor()))
+                .addToBackStack("fragment AB")
+                .commit()
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(color: Int) =
+            FragmentAA().apply {
+                arguments = Bundle().apply {
+                    putInt(FRAG_AA_COLOR, color)
+                }
+            }
+    }
+}

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

@@ -0,0 +1,36 @@
+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
+
+private const val FRAG_AB_COLOR = "frag_ab_color"
+
+class FragmentAB : Fragment() {
+    private val fragABColor: Int by lazy { arguments?.getInt(FRAG_AB_COLOR, 0) ?: 0 }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_a_b, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        view.setBackgroundColor(fragABColor)
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(color: Int) =
+            FragmentAB().apply {
+                arguments = Bundle().apply {
+                    putInt(FRAG_AB_COLOR, color)
+                }
+            }
+    }
+}

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

@@ -0,0 +1,50 @@
+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
+
+class FragmentB : Fragment() {
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                if (childFragmentManager.backStackEntryCount > 1) {
+                    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_b, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        childFragmentManager.beginTransaction()
+            .replace(R.id.container_fragment_ba, FragmentBA.newInstance())
+            .addToBackStack("fragmentBA")
+            .commit()
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance() = FragmentB()
+    }
+}

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

@@ -0,0 +1,51 @@
+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.fragment.app.setFragmentResultListener
+
+class FragmentBA : Fragment() {
+    private val isPortrait: Boolean get() = resources.getBoolean(R.bool.isPortrait)
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_b_a, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        setFragmentResultListener(FragmentBB.colorKey) { key, bundle ->
+            val color = bundle.getInt(FragmentBB.colorKey)
+
+            view.setBackgroundColor(color)
+        }
+
+        view.setBackgroundColor(ColorGenerator.generateColor())
+
+        view.findViewById<Button>(R.id.button).setOnClickListener {
+            if (isPortrait) {
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.container_fragment_ba, FragmentBB.newInstance())
+                    .addToBackStack("fragmentBB")
+                    .commit()
+            } else {
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.container_fragment_bb, FragmentBB.newInstance())
+                    .addToBackStack("fragmentBB")
+                    .commit()
+            }
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance() = FragmentBA()
+    }
+}

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

@@ -0,0 +1,43 @@
+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 android.widget.Button
+import android.widget.LinearLayout
+
+class FragmentBB : Fragment() {
+    private val isPortrait: Boolean get() = resources.getBoolean(R.bool.isPortrait)
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        return inflater.inflate(R.layout.fragment_b_b, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        view.setBackgroundColor(ColorGenerator.generateColor())
+
+        view.findViewById<Button>(R.id.button).setOnClickListener {
+            parentFragmentManager.setFragmentResult(colorKey, Bundle().apply {
+                putInt(colorKey, ColorGenerator.generateColor())
+            })
+
+            if (isPortrait) {
+                parentFragmentManager.popBackStack()
+            }
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance() = FragmentBB()
+        val colorKey = "COLOR_KEY"
+    }
+}

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 android.widget.Button
 import androidx.appcompat.app.AppCompatActivity
 
 class MainActivity : AppCompatActivity() {
-
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+
+        findViewById<Button>(R.id.button).setOnClickListener {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragment_view_container, FragmentA.newInstance())
+                .addToBackStack("fragmentA")
+                .commit()
+        }
+
+        findViewById<Button>(R.id.button2).setOnClickListener {
+            val intent = Intent(this, ActivityB::class.java)
+
+            startActivity(intent)
+        }
     }
 }