ДЗ Fragment #2

app/build.gradle

@@ -42,6 +42,7 @@ 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.activity:activity:1.8.0'
     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 +12,12 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Fragments"
         tools:targetApi="31">
+        <activity
+            android:name=".Activity2"
+            android:exported="false" />
+        <activity
+            android:name=".Activity1"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

app/src/main/java/otus/gpb/homework/fragments/Activity1.kt

@@ -0,0 +1,26 @@
+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 Activity1 : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_1)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+
+        supportFragmentManager.beginTransaction()
+            .replace(R.id.fragment_a, FragmentA())
+            .setReorderingAllowed(true)
+            .commit()
+    }
+}

app/src/main/java/otus/gpb/homework/fragments/Activity2.kt

@@ -0,0 +1,26 @@
+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 Activity2 : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_2)
+        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
+            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
+            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
+            insets
+        }
+
+        supportFragmentManager.beginTransaction()
+            .replace(R.id.fragment_b, FragmentB())
+            .setReorderingAllowed(true)
+            .commit()
+    }
+}

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

@@ -0,0 +1,51 @@
+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 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{
+                    requireActivity().finish()
+                }
+            }
+        }
+        requireActivity().onBackPressedDispatcher.addCallback(this, callback)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_a, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        val btnFragmentAA = view.findViewById<Button>(R.id.btn_open_fragmentAA)
+
+        btnFragmentAA.setOnClickListener {
+            val color = ColorGenerator.generateColor()
+            childFragmentManager.beginTransaction()
+                .replace(R.id.fragment_aa_container, FragmentAA.newInstance(color))
+                .setReorderingAllowed(true)
+                .addToBackStack("")
+                .commit()
+        }
+    }
+}

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

@@ -0,0 +1,56 @@
+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
+
+private const val ARG_BCK_COLOR = "background_color"
+
+class FragmentAA : Fragment() {
+    private var backgroundColor: Int? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backgroundColor = it.getInt(ARG_BCK_COLOR)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_a_a, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        backgroundColor?.let { backgroundColor -> view.setBackgroundColor(backgroundColor) }
+
+        val btnFragmentAB = view.findViewById<Button>(R.id.btn_open_fragmentAB)
+
+        btnFragmentAB.setOnClickListener {
+            val color = ColorGenerator.generateColor()
+            parentFragmentManager.beginTransaction()
+                .replace(R.id.fragment_aa_container, FragmentAB.newInstance(color))
+                .setReorderingAllowed(true)
+                .addToBackStack("")
+                .commit()
+        }
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(bckColor: Int) =
+            FragmentAA().apply {
+                arguments = Bundle().apply {
+                    putInt(ARG_BCK_COLOR, bckColor)
+                }
+            }
+    }
+}

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

@@ -0,0 +1,43 @@
+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 ARG_BCK_COLOR = "background_color"
+
+class FragmentAB : Fragment() {
+    private var backgroundColor: Int? = null
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            backgroundColor = it.getInt(ARG_BCK_COLOR)
+        }
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_a_b, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        backgroundColor?.let { backgroundColor -> view.setBackgroundColor(backgroundColor) }
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(bckColor: Int) =
+            FragmentAB().apply {
+                arguments = Bundle().apply {
+                    putInt(ARG_BCK_COLOR, bckColor)
+                }
+            }
+    }
+}

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

@@ -0,0 +1,38 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import androidx.fragment.app.Fragment
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+
+class FragmentB : Fragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_b, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        val orientation = requireActivity().resources.configuration.orientation
+
+        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            childFragmentManager.beginTransaction()
+                .replace(R.id.container_fragment_ba, FragmentBA())
+                .replace(R.id.container_fragment_bb, FragmentBB())
+                .setReorderingAllowed(true)
+                .commit()
+        } else {
+            childFragmentManager.beginTransaction()
+                .replace(R.id.container_fragment_ba, FragmentBA())
+                .setReorderingAllowed(true)
+                .commit()
+        }
+    }
+}

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

@@ -0,0 +1,46 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+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
+
+class FragmentBA : Fragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_b_a, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        observeResult { color ->
+            view.setBackgroundColor(color)
+        }
+
+        val orientation = requireActivity().resources.configuration.orientation
+
+        val btnFragmentBb = view.findViewById<Button>(R.id.btn_open_fragmentBB)
+
+        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            btnFragmentBb.visibility = View.GONE
+        } else {
+            btnFragmentBb.visibility = View.VISIBLE
+
+            btnFragmentBb.setOnClickListener {
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.container_fragment_ba, FragmentBB())
+                    .setReorderingAllowed(true)
+                    .addToBackStack("")
+                    .commit()
+            }
+        }
+    }
+}

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.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Button
+
+class FragmentBB : Fragment() {
+
+    override fun onCreateView(
+        inflater: LayoutInflater, container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        // Inflate the layout for this fragment
+        return inflater.inflate(R.layout.fragment_b_b, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+
+        val orientation = requireActivity().resources.configuration.orientation
+
+        val btnSendColor = view.findViewById<Button>(R.id.btn_send_color)
+
+        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            btnSendColor.setOnClickListener {
+                val color = ColorGenerator.generateColor()
+                sendResult(color = color)
+            }
+        } else {
+            btnSendColor.setOnClickListener {
+                val color = ColorGenerator.generateColor()
+                sendResult(color = color)
+                parentFragmentManager.popBackStack()
+            }
+        }
+    }
+}

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

@@ -0,0 +1,21 @@
+package otus.gpb.homework.fragments
+
+import androidx.core.os.bundleOf
+import androidx.fragment.app.Fragment
+
+private const val REQUEST_KEY = "fragment_bb_request_key"
+private const val RESULT_BUNDLE_KEY = "fragment_bb_result_bundle_key"
+
+fun Fragment.sendResult(color: Int) {
+    parentFragmentManager.setFragmentResult(
+        REQUEST_KEY,
+        bundleOf(RESULT_BUNDLE_KEY to color)
+    )
+}
+
+fun Fragment.observeResult(callback: (Int) -> Unit) {
+    parentFragmentManager.setFragmentResultListener(REQUEST_KEY, this) { _, result ->
+        val backgroundColor = result.getInt(RESULT_BUNDLE_KEY)
+        callback(backgroundColor)
+    }
+}