fragments

.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
+

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")
 }

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">

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()
+    }
+}

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)
+                }
+            }
+    }
+}

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)
+                }
+            }
+    }
+}

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)
+}