ДЗ Fragments

app/build.gradle

@@ -42,7 +42,9 @@ 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:1.8.0'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    implementation 'com.google.android.material:material:1.12.0'
 }

app/src/main/AndroidManifest.xml

@@ -12,6 +12,14 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.Fragments"
         tools:targetApi="31">
+        <activity
+            android:name=".Activity2"
+            android:exported="false"
+            android:label="Activity2" />
+        <activity
+            android:name=".Activity1"
+            android:exported="false"
+            android:label="Activity1" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

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

@@ -0,0 +1,28 @@
+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() {
+//    private lateinit var fragmentA: FragmentA
+
+    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
+        }
+        if (savedInstanceState == null) {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragment_container, FragmentA(), "FragmentA")
+                .addToBackStack(null)
+                .commit()
+        }
+    }
+}

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

@@ -0,0 +1,40 @@
+package otus.gpb.homework.fragments
+
+import android.content.res.Configuration
+import android.os.Bundle
+import android.view.View
+import android.widget.Button
+import android.widget.LinearLayout
+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
+        }
+        if (savedInstanceState == null) {
+            supportFragmentManager.beginTransaction()
+                .replace(R.id.fragment_container, FragmentBA(), "FragmentBA")
+                .commit()
+        }
+        val orientation = resources.configuration.orientation
+        if (orientation == Configuration.ORIENTATION_PORTRAIT) {
+            val fc = findViewById<androidx.fragment.app.FragmentContainerView>(R.id.fragment_container2)
+            fc.visibility = View.GONE
+        } else if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            if (savedInstanceState == null) {
+                supportFragmentManager.beginTransaction()
+                    .replace(R.id.fragment_container2, FragmentBB(), "FragmentBB")
+                    .commit()
+            }
+        }
+    }
+}

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

@@ -0,0 +1,47 @@
+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
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentA.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentA : Fragment() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+
+    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)
+        view.findViewById<Button>(R.id.button).setOnClickListener {
+            if (savedInstanceState == null) {
+                val color = ColorGenerator.generateColor()
+                childFragmentManager.beginTransaction()
+                    .replace(R.id.fragment_a_container, FragmentAA.newInstance(color), "FragmentAA")
+                    .addToBackStack(null)
+                    .commit()
+            }
+        }
+        view.findViewById<Button>(R.id.button_back).setOnClickListener {
+            if (childFragmentManager.backStackEntryCount > 0) {
+                childFragmentManager.popBackStack()
+            } else {
+                requireActivity().finish()
+            }
+        }
+    }
+}

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

@@ -0,0 +1,56 @@
+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
+import android.widget.TextView
+
+private const val ARG_COLOR = "color"
+
+class FragmentAA : Fragment() {
+    private var color: Int? = null
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            color = it.getInt(ARG_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)
+        view.findViewById<Button>(R.id.button).setOnClickListener {
+            if (savedInstanceState == null) {
+                val color = ColorGenerator.generateColor()
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.fragment_a_container, FragmentAB.newInstance(color), "FragmentAB")
+                    .addToBackStack(null)
+                    .commit()
+            }
+        }
+        val v = view.findViewById<androidx.constraintlayout.widget.ConstraintLayout>(R.id.fragment_a_a)
+        if (color != null)
+            v.setBackgroundColor(color!!)
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(color: Int) =
+            FragmentAA().apply {
+                arguments = Bundle().apply {
+                    putInt(ARG_COLOR, color)
+                }
+            }
+    }
+}

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

@@ -0,0 +1,47 @@
+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_COLOR = "color"
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentAB.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentAB : Fragment() {
+    private var color: Int? = null
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        arguments?.let {
+            color = it.getInt(ARG_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?) {
+        val v = view.findViewById<androidx.constraintlayout.widget.ConstraintLayout>(R.id.fragment_a_b)
+        if (color != null)
+            v.setBackgroundColor(color!!)
+    }
+
+    companion object {
+        @JvmStatic
+        fun newInstance(color: Int) =
+            FragmentAB().apply {
+                arguments = Bundle().apply {
+                    putInt(ARG_COLOR, color)
+                }
+            }
+    }
+}

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

@@ -0,0 +1,56 @@
+package otus.gpb.homework.fragments
+
+import android.content.Context
+import android.content.res.Configuration
+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 android.widget.TextView
+import androidx.core.os.bundleOf
+
+const val RESULT_KEY = "RESULT_KEY"
+const val RESULT_BUNDLE_KEY = "RESULT_BUNDLE_KEY"
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentBA.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentBA : Fragment() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+
+    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)
+        view.findViewById<Button>(R.id.buttonOpenBB).setOnClickListener {
+            if (savedInstanceState == null) {
+                parentFragmentManager.beginTransaction()
+                    .replace(R.id.fragment_container, FragmentBB(), "FragmentBB")
+                    .addToBackStack(null)
+                    .commit()
+            }
+        }
+        parentFragmentManager.setFragmentResultListener(RESULT_KEY, this) { _, bundle ->
+            val color = bundle.getInt(RESULT_BUNDLE_KEY)
+            val v = view.findViewById<androidx.constraintlayout.widget.ConstraintLayout>(R.id.fragmentBA)
+            v.setBackgroundColor(color)
+        }
+        val orientation = resources.configuration.orientation
+        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            val bt = view.findViewById<Button>(R.id.buttonOpenBB)
+            bt.visibility = View.GONE
+        }
+    }
+}

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

@@ -0,0 +1,43 @@
+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
+import androidx.core.os.bundleOf
+
+
+/**
+ * A simple [Fragment] subclass.
+ * Use the [FragmentBB.newInstance] factory method to
+ * create an instance of this fragment.
+ */
+class FragmentBB : Fragment() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+
+    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)
+        view.findViewById<Button>(R.id.buttonSendColor).setOnClickListener {
+            val color = ColorGenerator.generateColor()
+            parentFragmentManager.setFragmentResult(RESULT_KEY, bundleOf(RESULT_BUNDLE_KEY to color))
+            val orientation = resources.configuration.orientation
+            if (orientation == Configuration.ORIENTATION_PORTRAIT) {
+                parentFragmentManager.popBackStack()
+            }
+        }
+    }
+}

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

@@ -1,12 +1,20 @@
 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.button1).setOnClickListener {
+            startActivity(Intent(this, Activity1::class.java))
+        }
+        findViewById<Button>(R.id.button2).setOnClickListener {
+            startActivity(Intent(this, Activity2::class.java))
+        }
     }
 }

app/src/main/res/drawable/baseline_arrow_back_24.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:autoMirrored="true" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+
+    <path android:fillColor="@android:color/white" android:pathData="M20,11H7.83l5.59,-5.59L12,4l-8,8 8,8 1.41,-1.41L7.83,13H20v-2z"/>
+
+</vector>