From c86e865c6f2ba3206716490c0752433f00f1cc9c Mon Sep 17 00:00:00 2001
From: Andrey Samoykin <samoykin@gmail.com>
Date: Tue, 26 May 2026 13:46:38 +0900
Subject: [PATCH] upd

---
 app/src/main/AndroidManifest.xml              | 28 ++++++++-
 .../otus/gpb/homework/activities/ActivityA.kt | 33 ++++++++++
 .../otus/gpb/homework/activities/ActivityB.kt | 25 ++++++++
 .../otus/gpb/homework/activities/ActivityC.kt | 61 +++++++++++++++++++
 .../otus/gpb/homework/activities/ActivityD.kt | 16 +++++
 app/src/main/res/layout/activity_a.xml        | 14 +++++
 app/src/main/res/layout/activity_b.xml        | 14 +++++
 app/src/main/res/layout/activity_c.xml        | 34 +++++++++++
 app/src/main/res/layout/activity_d.xml        |  5 ++
 9 files changed, 229 insertions(+), 1 deletion(-)
 create mode 100644 app/src/main/java/otus/gpb/homework/activities/ActivityA.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/activities/ActivityB.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/activities/ActivityC.kt
 create mode 100644 app/src/main/java/otus/gpb/homework/activities/ActivityD.kt
 create mode 100644 app/src/main/res/layout/activity_a.xml
 create mode 100644 app/src/main/res/layout/activity_b.xml
 create mode 100644 app/src/main/res/layout/activity_c.xml
 create mode 100644 app/src/main/res/layout/activity_d.xml

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 811aafa1..7620c258 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -11,6 +11,32 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.Activities"
-        tools:targetApi="31" />
+        tools:targetApi="31">
+
+        <activity
+            android:name=".ActivityD"
+            android:exported="false"
+            android:taskAffinity="${applicationId}.stack2" />
+
+        <activity
+            android:name=".ActivityC"
+            android:exported="false"
+            android:taskAffinity="${applicationId}.stack2" />
+
+        <activity
+            android:name=".ActivityB"
+            android:exported="false"
+            android:taskAffinity="${applicationId}.stack2" />
+
+        <activity
+            android:name=".ActivityA"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityA.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityA.kt
new file mode 100644
index 00000000..48fa4279
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityA.kt
@@ -0,0 +1,33 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import otus.gpb.homework.activities.databinding.ActivityABinding
+
+class ActivityA : AppCompatActivity() {
+
+    private lateinit var binding: ActivityABinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityABinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.openActivityBButton.setOnClickListener {
+            openActivityB()
+        }
+    }
+
+    override fun onNewIntent(intent: Intent?) {
+        super.onNewIntent(intent)
+        setIntent(intent)
+    }
+
+    private fun openActivityB() {
+        val intent = Intent(this, ActivityB::class.java).apply {
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        }
+        startActivity(intent)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityB.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityB.kt
new file mode 100644
index 00000000..e7b30fea
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityB.kt
@@ -0,0 +1,25 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import otus.gpb.homework.activities.databinding.ActivityBBinding
+
+class ActivityB : AppCompatActivity() {
+
+    private lateinit var binding: ActivityBBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityBBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.openActivityCButton.setOnClickListener {
+            openActivityC()
+        }
+    }
+
+    private fun openActivityC() {
+        startActivity(Intent(this, ActivityC::class.java))
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityC.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityC.kt
new file mode 100644
index 00000000..283a65a4
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityC.kt
@@ -0,0 +1,61 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import otus.gpb.homework.activities.databinding.ActivityCBinding
+
+class ActivityC : AppCompatActivity() {
+
+    private lateinit var binding: ActivityCBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityCBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        binding.openActivityAButton.setOnClickListener {
+            openActivityA()
+        }
+        binding.openActivityDButton.setOnClickListener {
+            openActivityD()
+        }
+        binding.closeActivityCButton.setOnClickListener {
+            closeActivityC()
+        }
+        binding.closeStackButton.setOnClickListener {
+            closeStack()
+        }
+    }
+
+    private fun openActivityA() {
+        val intent = Intent(this, ActivityA::class.java).apply {
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+            addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
+        }
+        startActivity(intent)
+    }
+
+    private fun openActivityD() {
+        val intent = Intent(this, ActivityD::class.java).apply {
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK)
+        }
+        startActivity(intent)
+    }
+
+    private fun closeActivityC() {
+        finish()
+    }
+
+    private fun closeStack() {
+        val intent = Intent(this, ActivityA::class.java).apply {
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+            addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
+        }
+        startActivity(intent)
+        finishAffinity()
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/otus/gpb/homework/activities/ActivityD.kt b/app/src/main/java/otus/gpb/homework/activities/ActivityD.kt
new file mode 100644
index 00000000..03525db0
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityD.kt
@@ -0,0 +1,16 @@
+package otus.gpb.homework.activities
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import otus.gpb.homework.activities.databinding.ActivityDBinding
+
+class ActivityD : AppCompatActivity() {
+
+    private lateinit var binding: ActivityDBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityDBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_a.xml b/app/src/main/res/layout/activity_a.xml
new file mode 100644
index 00000000..5a6970b0
--- /dev/null
+++ b/app/src/main/res/layout/activity_a.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#f44336">
+
+    <Button
+        android:id="@+id/openActivityBButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="Open ActivityB" />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_b.xml b/app/src/main/res/layout/activity_b.xml
new file mode 100644
index 00000000..e73452e9
--- /dev/null
+++ b/app/src/main/res/layout/activity_b.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#4caf50">
+
+    <Button
+        android:id="@+id/openActivityCButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center"
+        android:text="Open ActivityC" />
+
+</FrameLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_c.xml b/app/src/main/res/layout/activity_c.xml
new file mode 100644
index 00000000..34c663cb
--- /dev/null
+++ b/app/src/main/res/layout/activity_c.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#2196f3"
+    android:gravity="center"
+    android:orientation="vertical"
+    android:padding="24dp">
+
+    <Button
+        android:id="@+id/openActivityAButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Open ActivityA" />
+
+    <Button
+        android:id="@+id/openActivityDButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Open ActivityD" />
+
+    <Button
+        android:id="@+id/closeActivityCButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Close ActivityC" />
+
+    <Button
+        android:id="@+id/closeStackButton"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Close Stack" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_d.xml b/app/src/main/res/layout/activity_d.xml
new file mode 100644
index 00000000..b3190df7
--- /dev/null
+++ b/app/src/main/res/layout/activity_d.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#ffeb3b" />
\ No newline at end of file