From 97227c8c92cb2643c086cbadd58fd4a216b0e16e Mon Sep 17 00:00:00 2001
From: maxdgladkov <maxdgladkov@gmail.com>
Date: Sat, 18 Apr 2026 17:00:52 +0300
Subject: [PATCH] hm 1

---
 app/build.gradle                              |  2 +
 app/src/main/AndroidManifest.xml              | 25 ++++++++-
 .../otus/gpb/homework/activities/ActivityA.kt | 30 +++++++++++
 .../otus/gpb/homework/activities/ActivityB.kt | 29 +++++++++++
 .../otus/gpb/homework/activities/ActivityC.kt | 46 +++++++++++++++++
 .../otus/gpb/homework/activities/ActivityD.kt | 20 ++++++++
 app/src/main/res/layout/activity_a.xml        | 20 ++++++++
 app/src/main/res/layout/activity_b.xml        | 22 ++++++++
 app/src/main/res/layout/activity_c.xml        | 51 +++++++++++++++++++
 app/src/main/res/layout/activity_d.xml        | 11 ++++
 app/src/main/res/values/strings.xml           |  7 +++
 11 files changed, 262 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/build.gradle b/app/build.gradle
index 07e82a52..a3df66fa 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -56,4 +56,6 @@ dependencies {
     implementation 'androidx.core:core-ktx:1.13.1'
     implementation 'androidx.appcompat:appcompat:1.6.1'
     implementation 'com.google.android.material:material:1.12.0'
+    implementation 'androidx.activity:activity:1.8.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 811aafa1..b11400b2 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -11,6 +11,29 @@
         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="Task.Two"/>
+        <activity
+            android:name=".ActivityC"
+            android:exported="false"
+            android:taskAffinity="Task.Two"/>
+        <activity
+            android:name=".ActivityB"
+            android:exported="false"
+            android:taskAffinity="Task.Two"/>
+        <activity
+            android:name=".ActivityA"
+            android:exported="true"
+            android:taskAffinity="Task.One"
+            android:launchMode="singleTop">
+            <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..834c9ed5
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityA.kt
@@ -0,0 +1,30 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Button
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityA : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_a)
+
+        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
+        }
+
+        findViewById<Button>(R.id.button).setOnClickListener {
+            //OPEN ACTIVITY B
+            val intent = Intent(this, ActivityB::class.java)
+            intent.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..730b9f35
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityB.kt
@@ -0,0 +1,29 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Button
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityB : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_b)
+
+        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
+        }
+
+        findViewById<Button>(R.id.button).setOnClickListener {
+            //OPEN ACTIVITY С
+            val intent = Intent(this, ActivityC::class.java)
+            startActivity(intent)
+        }
+    }
+}
\ 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..dda6a333
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityC.kt
@@ -0,0 +1,46 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Button
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityC : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_c)
+        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
+        }
+
+        findViewById<Button>(R.id.button1).setOnClickListener {
+            //OPEN ACTIVITY A
+            val intent = Intent(this, ActivityA::class.java)
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            startActivity(intent)
+        }
+
+        findViewById<Button>(R.id.button2).setOnClickListener {
+            //OPEN ACTIVITY D
+            val intent = Intent(this, ActivityD::class.java)
+            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK)
+            startActivity(intent)
+        }
+
+        findViewById<Button>(R.id.button3).setOnClickListener {
+            //Close ACTIVITY C
+            finish()
+        }
+
+        findViewById<Button>(R.id.button4).setOnClickListener {
+            //Close Stack
+            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..1c403481
--- /dev/null
+++ b/app/src/main/java/otus/gpb/homework/activities/ActivityD.kt
@@ -0,0 +1,20 @@
+package otus.gpb.homework.activities
+
+import android.os.Bundle
+import androidx.activity.enableEdgeToEdge
+import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.ViewCompat
+import androidx.core.view.WindowInsetsCompat
+
+class ActivityD : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContentView(R.layout.activity_d)
+        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
+        }
+    }
+}
\ 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..27c3ad8f
--- /dev/null
+++ b/app/src/main/res/layout/activity_a.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#f44336"
+    tools:context=".ActivityA">
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/open_activity_b"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+</androidx.constraintlayout.widget.ConstraintLayout>
\ 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..90bfb0a0
--- /dev/null
+++ b/app/src/main/res/layout/activity_b.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#4caf50"
+    tools:context=".ActivityB">
+
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/open_activity_c"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"  />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ 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..83a24237
--- /dev/null
+++ b/app/src/main/res/layout/activity_c.xml
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#2196f3"
+    tools:context=".ActivityC">
+
+    <Button
+        android:id="@+id/button1"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/open_activity_a"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toBottomOf="@id/button2"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <Button
+        android:id="@+id/button2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/open_activity_d"
+        app:layout_constraintTop_toTopOf="@id/button1"
+        app:layout_constraintBottom_toBottomOf="@id/button3"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <Button
+        android:id="@+id/button3"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/close_activity_c"
+        app:layout_constraintTop_toTopOf="@id/button2"
+        app:layout_constraintBottom_toBottomOf="@id/button4"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <Button
+        android:id="@+id/button4"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/close_stack"
+        app:layout_constraintTop_toTopOf="@id/button3"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ 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..1e287ddb
--- /dev/null
+++ b/app/src/main/res/layout/activity_d.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/main"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="#ffeb3b"
+    tools:context=".ActivityD">
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 08ea3c61..b14bf828 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,10 @@
 <resources>
     <string name="app_name">Activities</string>
+
+    <string name="open_activity_a">Open Activity A</string>
+    <string name="open_activity_b">Open Activity B</string>
+    <string name="open_activity_c">Open Activity C</string>
+    <string name="open_activity_d">Open Activity D</string>
+    <string name="close_activity_c">Close Activity C</string>
+    <string name="close_stack">Close Stack</string>
 </resources>
\ No newline at end of file