feat: add homework #1

app/build.gradle

@@ -35,4 +35,5 @@ dependencies {
     implementation 'androidx.core:core-ktx:1.8.0'
     implementation 'androidx.appcompat:appcompat:1.5.0'
     implementation 'com.google.android.material:material:1.6.1'
+    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
 }

app/src/main/AndroidManifest.xml

@@ -12,6 +12,25 @@
         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" />
+        <activity
+            android:name=".ActivityC"
+            android:exported="false" />
+        <activity
+            android:name=".ActivityB"
+            android:exported="false" />
+        <activity
+            android:name=".ActivityA"
+            android:exported="true"
+            android:launchMode="singleTask">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
 
 </manifest>

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

@@ -0,0 +1,35 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.util.Log
+import android.widget.Button
+
+const val TAG_A = "ACTIVITY_A"
+
+class ActivityA : AppCompatActivity(R.layout.activity_a) {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+
+    override fun onStart() {
+        super.onStart()
+
+        val button = findViewById<Button>(R.id.button)
+
+        button.setOnClickListener {
+            val intent = Intent(this, ActivityB::class.java).apply {
+                flags = Intent.FLAG_ACTIVITY_MULTIPLE_TASK or Intent.FLAG_ACTIVITY_NEW_TASK
+            }
+
+            startActivity(intent)
+        }
+    }
+
+    override fun onNewIntent(intent: Intent?) {
+
+        Log.d(TAG_A, "onNewIntent activity A")
+        super.onNewIntent(intent)
+    }
+}

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

@@ -0,0 +1,25 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.widget.Button
+
+class ActivityB : AppCompatActivity(R.layout.activity_b) {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+
+    override fun onStart() {
+        super.onStart()
+
+        val button = findViewById<Button>(R.id.button)
+
+        button.setOnClickListener {
+            val intent = Intent(this, ActivityC::class.java)
+
+            startActivity(intent)
+        }
+    }
+
+}

app/src/main/java/otus/gpb/homework/activities/ActivityC.kt

@@ -0,0 +1,48 @@
+package otus.gpb.homework.activities
+
+import android.content.Intent
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+import android.widget.Button
+
+class ActivityC : AppCompatActivity(R.layout.activity_c) {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+
+    override fun onStart() {
+        super.onStart()
+
+        val buttonOpenActivityA = findViewById<Button>(R.id.button4)
+
+        buttonOpenActivityA.setOnClickListener {
+            val intent = Intent(this, ActivityA::class.java)
+            startActivity(intent)
+        }
+
+        val buttonOpenActivityD = findViewById<Button>(R.id.button3)
+
+        buttonOpenActivityD.setOnClickListener {
+            val intent = Intent(this, ActivityD::class.java)
+
+            finishAffinity()
+            startActivity(intent)
+        }
+
+        val buttonCloseActivityC = findViewById<Button>(R.id.button2)
+
+        buttonCloseActivityC.setOnClickListener {
+            finish()
+        }
+
+
+        val buttonCloseStack = findViewById<Button>(R.id.button)
+
+        buttonCloseStack.setOnClickListener {
+            val intent = Intent(this, ActivityA::class.java)
+
+            finishAffinity()
+            startActivity(intent)
+        }
+    }
+}

app/src/main/java/otus/gpb/homework/activities/ActivityD.kt

@@ -0,0 +1,10 @@
+package otus.gpb.homework.activities
+
+import androidx.appcompat.app.AppCompatActivity
+import android.os.Bundle
+
+class ActivityD : AppCompatActivity(R.layout.activity_d) {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+    }
+}

app/src/main/res/layout/activity_a.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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/activityA_background"
+    tools:context=".ActivityA">
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/activityA_btn"
+        android:textAllCaps="false"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.8" />
+</androidx.constraintlayout.widget.ConstraintLayout>

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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/activityB_background"
+    tools:context=".ActivityB">
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/activityB_btn"
+        android:textAllCaps="false"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.8" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_c.xml

@@ -0,0 +1,61 @@
+<?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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/activityC_background"
+    tools:context=".ActivityC">
+
+    <Button
+        android:id="@+id/button4"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/activityC_btn"
+        android:textAllCaps="false"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.862"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.774" />
+
+    <Button
+        android:id="@+id/button3"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/activityC_btn_2"
+        android:textAllCaps="false"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.074"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.774" />
+
+    <Button
+        android:id="@+id/button2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/activityC_btn_3"
+        android:textAllCaps="false"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.06"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.907" />
+
+    <Button
+        android:id="@+id/button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/activityC_btn_4"
+        android:textAllCaps="false"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.872"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.907" />
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_d.xml

@@ -0,0 +1,10 @@
+<?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:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/activityD_background"
+    tools:context=".ActivityD">
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/colors.xml

@@ -7,4 +7,8 @@
     <color name="teal_700">#FF018786</color>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
+    <color name="activityA_background">#f44336</color>
+    <color name="activityB_background">#4caf50</color>
+    <color name="activityC_background">#2196f3</color>
+    <color name="activityD_background">#ffeb3b</color>
 </resources>

app/src/main/res/values/strings.xml

@@ -1,3 +1,9 @@
 <resources>
     <string name="app_name">Activities</string>
+    <string name="activityA_btn">Open ActivityB</string>
+    <string name="activityB_btn">Open ActivityC</string>
+    <string name="activityC_btn">Open ActivityA</string>
+    <string name="activityC_btn_2">Open ActivityD</string>
+    <string name="activityC_btn_3">Close ActivityC</string>
+    <string name="activityC_btn_4">Close Stack</string>
 </resources>