Домашнее задание Fragment

app/build.gradle

@@ -34,6 +34,9 @@ android {
     kotlinOptions {
         jvmTarget = '17'
     }
+    buildFeatures {
+        viewBinding = true
+    }
 }
 
 dependencies {
@@ -45,4 +48,5 @@ dependencies {
     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.activity:activity:1.9.3'
 }

app/src/main/AndroidManifest.xml

@@ -12,12 +12,17 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Fragments"
         tools:targetApi="31">
+        <activity
+            android:name=".ActivityA"
+            android:exported="false" />
+        <activity
+            android:name=".ActivityB"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>

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

@@ -0,0 +1,29 @@
+package otus.gpb.homework.fragments
+
+import android.os.Bundle
+import android.window.OnBackInvokedDispatcher
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+import otus.gpb.homework.fragments.databinding.ActivityABinding
+import otus.gpb.homework.fragments.databinding.ActivityMainBinding
+import otus.gpb.homework.fragments.fragments.FragmentA
+
+class ActivityA : AppCompatActivity() {
+    private lateinit var binding: ActivityABinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        binding = ActivityABinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        if (savedInstanceState == null) {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragmentContainerA, FragmentA(), "FragmentA")
+                .addToBackStack(null)
+                .commit()
+        }
+    }
+}

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

@@ -0,0 +1,46 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.isVisible
+import otus.gpb.homework.fragments.databinding.ActivityBBinding
+import otus.gpb.homework.fragments.fragments.FragmentBA
+import otus.gpb.homework.fragments.fragments.FragmentBB
+
+class ActivityB : AppCompatActivity() {
+
+    private lateinit var binding: ActivityBBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        binding = ActivityBBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        supportFragmentManager.beginTransaction()
+            .replace(R.id.fragmentContainerBA, FragmentBA())
+            .replace(R.id.fragmentContainerBB, FragmentBB())
+            .commit()
+
+        switchFragments()
+    }
+
+    private fun switchFragments() {
+
+        val currentOrientation = resources.configuration.orientation
+        if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
+            with(binding) {
+                fragmentContainerBA.isVisible = true
+                fragmentContainerBB.isVisible = false
+            }
+
+        } else {
+            with(binding) {
+                fragmentContainerBA.isVisible = true
+                fragmentContainerBB.isVisible = true
+            }
+        }
+    }
+}

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

@@ -0,0 +1,52 @@
+package otus.gpb.homework.fragments.fragments
+
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.activity.OnBackPressedCallback
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.ColorGenerator
+import otus.gpb.homework.fragments.R
+import otus.gpb.homework.fragments.databinding.ActivityMainBinding
+import otus.gpb.homework.fragments.databinding.FragmentABinding
+
+private const val KEY = "color"
+class FragmentA : Fragment( ) {
+
+    private lateinit var binding: FragmentABinding
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        binding = FragmentABinding.inflate(inflater, container, false)
+        binding.openFragmentAA.isEnabled = true
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+
+        val bundle = Bundle()
+        bundle.putInt(KEY, ColorGenerator.generateColor())
+        val fragmentAA = FragmentAA()
+        fragmentAA.arguments = bundle
+
+        binding.openFragmentAA.setOnClickListener {
+            childFragmentManager.beginTransaction()
+                .add(R.id.fragmentContainerAA, fragmentAA)
+                .addToBackStack("fragmentA")
+                .commit()
+            binding.openFragmentAA.isEnabled = false
+        }
+
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+               activity?.finish()
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)
+    }
+}

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

@@ -0,0 +1,55 @@
+package otus.gpb.homework.fragments.fragments
+
+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
+import otus.gpb.homework.fragments.ColorGenerator
+import otus.gpb.homework.fragments.R
+import otus.gpb.homework.fragments.databinding.FragmentAaBinding
+
+
+private const val KEY = "color"
+class FragmentAA : Fragment() {
+
+    private lateinit var binding: FragmentAaBinding
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        binding = FragmentAaBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val color = arguments?.getInt(KEY)
+        if (color != null) {
+            this.view?.setBackgroundColor(color)
+        }
+
+        val bundle = Bundle()
+        bundle.putInt(KEY, ColorGenerator.generateColor())
+        val fragmentAB = FragmentAB()
+        fragmentAB.arguments = bundle
+
+        binding.openFragmentAB.setOnClickListener {
+            parentFragmentManager.beginTransaction()
+                .replace(R.id.fragmentContainerAB, fragmentAB)
+                .addToBackStack("fragmentAA")
+                .commit()
+        }
+
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                parentFragmentManager.popBackStack()
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)
+    }
+}

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

@@ -0,0 +1,25 @@
+package otus.gpb.homework.fragments.fragments
+
+import android.os.Bundle
+import android.view.View
+import androidx.activity.OnBackPressedCallback
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.R
+private const val KEY = "color"
+class FragmentAB : Fragment(R.layout.fragment_ab) {
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val color = arguments?.getInt(KEY)
+
+        if (color != null) {
+            this.view?.setBackgroundColor(color)
+        }
+
+        val callback = object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                parentFragmentManager.popBackStack("fragmentAA", 1)
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, callback)
+    }
+}

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

@@ -0,0 +1,6 @@
+package otus.gpb.homework.fragments.fragments
+
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.R
+
+class FragmentB : Fragment(R.layout.fragment_b)

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

@@ -0,0 +1,49 @@
+package otus.gpb.homework.fragments.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.core.view.isVisible
+import androidx.fragment.app.Fragment
+import otus.gpb.homework.fragments.R
+import otus.gpb.homework.fragments.databinding.FragmentABinding
+import otus.gpb.homework.fragments.databinding.FragmentBaBinding
+
+private const val KEY = "color"
+private const val REQUEST_KEY = "colorBundle"
+class FragmentBA : Fragment() {
+
+    private lateinit var binding: FragmentBaBinding
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        binding = FragmentBaBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        parentFragmentManager.setFragmentResultListener(REQUEST_KEY, this) { _, bundle ->
+            val color = bundle.getInt(KEY)
+            this.view?.setBackgroundColor(color)
+        }
+
+        with(binding.openFragmentBB) {
+
+            setOnClickListener {
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.fragmentContainerBA, FragmentBB())
+                    .commit()
+            }
+            val currentOrientation = resources.configuration.orientation
+            isVisible = currentOrientation == Configuration.ORIENTATION_PORTRAIT
+        }
+    }
+}

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

@@ -0,0 +1,45 @@
+package otus.gpb.homework.fragments.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
+import otus.gpb.homework.fragments.ColorGenerator
+import otus.gpb.homework.fragments.R
+import otus.gpb.homework.fragments.databinding.FragmentBbBinding
+
+private const val KEY = "color"
+private const val REQUEST_KEY = "colorBundle"
+class FragmentBB : Fragment(R.layout.fragment_bb) {
+
+    private lateinit var binding: FragmentBbBinding
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        binding = FragmentBbBinding.inflate(inflater, container, false)
+        return binding.root
+    }
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        binding.sendColor.setOnClickListener {
+            val bundle = Bundle()
+            bundle.putInt(KEY, ColorGenerator.generateColor())
+
+            parentFragmentManager.setFragmentResult(REQUEST_KEY, bundle)
+
+            val currentOrientation = resources.configuration.orientation
+            if (currentOrientation == Configuration.ORIENTATION_PORTRAIT) {
+                parentFragmentManager.beginTransaction()
+                    .add(R.id.fragmentContainerBA, FragmentBA())
+                    .commit()
+            }
+        }
+    }
+}

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

@@ -1,12 +1,27 @@
 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.openActivityA.setOnClickListener {
+            startActivity(Intent(this, ActivityA::class.java))
+        }
+
+        binding.openActivityB.setOnClickListener {
+            startActivity(Intent(this, ActivityB::class.java))
+        }
     }
-}
+}
+