DZ Fragments Alekseev Igor

app/build.gradle

@@ -3,10 +3,6 @@ plugins {
     id 'org.jetbrains.kotlin.android'
 }
 
-kotlin {
-    jvmToolchain(17)
-}
-
 android {
     compileSdk 34
     namespace "otus.gpb.homework.fragments"
@@ -34,6 +30,9 @@ android {
     kotlinOptions {
         jvmTarget = '17'
     }
+    buildFeatures {
+        viewBinding true
+    }
 }
 
 dependencies {
@@ -42,6 +41,7 @@ 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.fragment:fragment-ktx:1.8.5'
     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

@@ -21,6 +21,16 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".ActivityA"
+            android:launchMode="standard"
+            android:exported="false">
+        </activity>
+        <activity
+            android:name=".ActivityB"
+            android:launchMode="standard"
+            android:exported="false">
+        </activity>
     </application>
 
 </manifest>

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

@@ -0,0 +1,16 @@
+package otus.gpb.homework.fragments
+
+import android.annotation.SuppressLint
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+
+class ActivityA: AppCompatActivity(R.layout.activity_a) {
+
+    @SuppressLint("ResourceType")
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        supportFragmentManager.beginTransaction()
+            .add(R.id.containerActivityA, FragmentMainActivityA())
+            .commit()
+    }
+}

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

@@ -0,0 +1,26 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+
+class ActivityB: AppCompatActivity() {
+
+    private val fragmentBA = FragmentBA()
+    private val fragmentBB = FragmentBB()
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_b)
+        val fm = supportFragmentManager.beginTransaction()
+        fm.add(R.id.containerBA, fragmentBB)
+        fm.add(R.id.containerBB, fragmentBA)
+        if(resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
+            fm.hide(fragmentBB)
+        }
+        fm.commit()
+    }
+
+    fun getFragmentBA() = fragmentBA
+    fun getFragmentBB() = fragmentBB
+}

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

@@ -0,0 +1,41 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.View
+import android.widget.Button
+import androidx.activity.OnBackPressedCallback
+import androidx.core.os.bundleOf
+import androidx.fragment.app.setFragmentResult
+
+class FragmentA : Fragment(R.layout.fragment_a) {
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+        val backPressedCallBack = object : OnBackPressedCallback(true)
+        {
+            override fun handleOnBackPressed() {
+                if(parentFragmentManager.backStackEntryCount <= 1)
+                    requireActivity().finish()
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(this, backPressedCallBack)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val button = view.findViewById<Button>(R.id.buttonOpenFragmentAA)
+        button.setOnClickListener{
+            val bundle = Bundle()
+            bundle.putInt("toFragmentAA", ColorGenerator.generateColor())
+            val fragment = FragmentAA()
+            fragment.setArguments(bundle)
+
+            parentFragmentManager.beginTransaction()
+                .replace(R.id.containerActivityA, fragment)
+                .addToBackStack("")
+                .commit()
+        }
+    }
+}

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

@@ -0,0 +1,42 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.View
+import android.widget.Button
+import androidx.core.os.bundleOf
+import androidx.fragment.app.setFragmentResult
+import androidx.fragment.app.setFragmentResultListener
+
+class FragmentAA : Fragment(R.layout.fragment_aa) {
+
+    private var color: Int? = null
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        if( savedInstanceState != null ) {
+            color = savedInstanceState.getInt("color")
+        } else {
+            color = getArguments()?.getInt("toFragmentAA")
+        }
+        color?.let{ view.setBackgroundColor(it) }
+
+       val button = view.findViewById<Button>(R.id.buttonOpenFragmentAB)
+       button.setOnClickListener(){
+           val bundle = Bundle()
+           bundle.putInt("colorToFragmentAB", ColorGenerator.generateColor())
+           val fragment = FragmentAB()
+           fragment.setArguments(bundle)
+           parentFragmentManager.beginTransaction()
+               .replace(R.id.containerActivityA, fragment)
+               .addToBackStack("")
+               .commit()
+       }
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        color?.let{ outState.putInt("color", it) }
+    }
+}

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

@@ -0,0 +1,27 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.View
+import androidx.fragment.app.setFragmentResultListener
+
+class FragmentAB : Fragment(R.layout.fragment_ab) {
+
+    private var color: Int? = null
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        if(savedInstanceState != null) {
+            color = savedInstanceState.getInt("color")
+        } else {
+            color = getArguments()?.getInt("colorToFragmentAB")
+        }
+        color?.let{view.setBackgroundColor(it)}
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        color?.let{ outState.putInt("color", it) }
+    }
+}

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

@@ -0,0 +1,41 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.View
+import android.widget.Button
+import androidx.fragment.app.setFragmentResult
+import androidx.core.os.bundleOf
+import androidx.fragment.app.setFragmentResultListener
+
+class FragmentBA : Fragment(R.layout.fragment_ba) {
+
+    private var color: Int = 0
+    private lateinit var button: Button
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        button = view.findViewById<Button>(R.id.buttonOpenFragmentBB)
+        button.setOnClickListener() {
+            setFragmentResult("toFragmentBB", bundleOf("color" to color))
+            val fm = parentFragmentManager.beginTransaction()
+            if(resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
+                fm.hide((requireActivity() as ActivityB).getFragmentBA())
+            }
+            fm.show((requireActivity() as ActivityB).getFragmentBB())
+            fm.commit()
+        }
+        setColorOfButton()
+        setFragmentResultListener("toFragmentBA") { _, bundle ->
+            val color = bundle.getInt("color")
+            getView()?.setBackgroundColor(color)
+            setColorOfButton()
+        }
+    }
+
+    private fun setColorOfButton(){
+        color = ColorGenerator.generateColor()
+        button.setBackgroundColor(color)
+    }
+}

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

@@ -0,0 +1,41 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.View
+import android.widget.Button
+import androidx.fragment.app.setFragmentResult
+import androidx.core.os.bundleOf
+import androidx.fragment.app.setFragmentResultListener
+
+class FragmentBB : Fragment(R.layout.fragment_bb) {
+
+    private var color: Int = 0
+    private lateinit var button: Button
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        button = view.findViewById<Button>(R.id.buttonOpenFragmentBA)
+        button.setOnClickListener(){
+            setFragmentResult("toFragmentBA", bundleOf("color" to color))
+            val fm = parentFragmentManager.beginTransaction()
+            if(resources.configuration.orientation == Configuration.ORIENTATION_PORTRAIT) {
+                fm.hide((requireActivity() as ActivityB).getFragmentBB())
+            }
+            fm.show((requireActivity() as ActivityB).getFragmentBA())
+            fm.commit()
+        }
+        setColorOfButton()
+        setFragmentResultListener("toFragmentBB") { _, bundle ->
+           val color = bundle.getInt("color")
+           getView()?.setBackgroundColor(color)
+           setColorOfButton()
+       }
+    }
+
+    private fun setColorOfButton(){
+        color = ColorGenerator.generateColor()
+        button.setBackgroundColor(color)
+    }
+}

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

@@ -0,0 +1,20 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.View
+import android.widget.Button
+
+class FragmentMainActivityA : Fragment(R.layout.fragment_main_activity_a) {
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+            val button = view.findViewById<Button>(R.id.buttonOpenFragmentA)
+            button.setOnClickListener(){
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.containerActivityA, FragmentA())
+                    .addToBackStack("")
+                    .commit()
+        }
+    }
+}

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

@@ -1,12 +1,28 @@
 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.buttonFragmentA.setOnClickListener {
+            val intent = Intent(this, ActivityA::class.java)
+            //intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            startActivity(intent)
+        }
+        binding.buttonFragmentB.setOnClickListener {
+            val intent = Intent(this, ActivityB::class.java)
+            //intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            startActivity(intent)
+        }
     }
-}
+}
+
+

app/src/main/res/layout-land/activity_b.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:baselineAligned="false"
+    android:orientation="horizontal"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <FrameLayout
+        android:id="@+id/containerBB"
+        android:layout_weight="1"
+        android:layout_height="match_parent"
+        android:layout_width="match_parent" />
+
+    <FrameLayout
+        android:id="@+id/containerBA"
+        android:layout_weight="1"
+        android:layout_height="match_parent"
+        android:layout_width="match_parent" />
+
+</LinearLayout>

app/src/main/res/layout/activity_a.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <androidx.fragment.app.FragmentContainerView
+        android:id="@+id/containerActivityA"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+</androidx.constraintlayout.widget.ConstraintLayout>