From a4a51b79663320a535957dd45cc56a429274b6f1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=92=D0=B0=D1=88=D0=B5=20=D0=98=D0=BC=D1=8F?=
 <you@example.com>
Date: Wed, 24 Sep 2025 14:01:30 +0400
Subject: [PATCH] lab3

---
 app/src/main/AndroidManifest.xml              |  3 +-
 .../com/example/myapplication/MainActivity.kt | 80 ++++++++-----------
 app/src/main/res/layout/activity_main.xml     | 14 +---
 3 files changed, 40 insertions(+), 57 deletions(-)

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 7687c6b..ea254fe 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -2,8 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
-    <uses-permission android:name="android.permission.READ_CONTACTS" />
-    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/com/example/myapplication/MainActivity.kt b/app/src/main/java/com/example/myapplication/MainActivity.kt
index 3c60601..d161bda 100644
--- a/app/src/main/java/com/example/myapplication/MainActivity.kt
+++ b/app/src/main/java/com/example/myapplication/MainActivity.kt
@@ -1,63 +1,53 @@
 package com.example.myapplication
 
-import android.Manifest
-import android.content.pm.PackageManager
+import android.net.ConnectivityManager
+import android.net.Network
+import android.net.NetworkCapabilities
 import android.os.Bundle
-import android.widget.Button
+import android.widget.TextView
 import android.widget.Toast
 import androidx.activity.ComponentActivity
-import androidx.activity.result.contract.ActivityResultContracts
-import androidx.core.content.ContextCompat
+import androidx.core.content.getSystemService
 
 class MainActivity : ComponentActivity() {
 
-    // Запрос разрешения на контакты
-    private val requestContactsPermission = registerForActivityResult(
-        ActivityResultContracts.RequestPermission()
-    ) { isGranted: Boolean ->
-        if (isGranted) {
-            Toast.makeText(this, "Доступ к контактам разрешён", Toast.LENGTH_SHORT).show()
-        } else {
-            Toast.makeText(this, "Доступ к контактам запрещён", Toast.LENGTH_SHORT).show()
-        }
-    }
-
-    // Запрос разрешения на галерею
-    private val requestGalleryPermission = registerForActivityResult(
-        ActivityResultContracts.RequestPermission()
-    ) { isGranted: Boolean ->
-        if (isGranted) {
-            Toast.makeText(this, "Доступ к галерее разрешён", Toast.LENGTH_SHORT).show()
-        } else {
-            Toast.makeText(this, "Доступ к галерее запрещён", Toast.LENGTH_SHORT).show()
-        }
-    }
+    private lateinit var tvStatus: TextView
+    private lateinit var connectivityManager: ConnectivityManager
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        val btnContacts = findViewById<Button>(R.id.btnContacts)
-        val btnGallery = findViewById<Button>(R.id.btnGallery)
+        tvStatus = findViewById(R.id.tvNetworkStatus)
+        connectivityManager = getSystemService()!!
 
-        // При нажатии на кнопку "Контакты"
-        btnContacts.setOnClickListener {
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_CONTACTS)
-                == PackageManager.PERMISSION_GRANTED) {
-                Toast.makeText(this, "Уже есть доступ к контактам", Toast.LENGTH_SHORT).show()
-            } else {
-                requestContactsPermission.launch(Manifest.permission.READ_CONTACTS)
-            }
-        }
+        // Проверяем сеть при старте
+        updateNetworkStatus()
 
-        // При нажатии на кнопку "Галерея"
-        btnGallery.setOnClickListener {
-            if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_MEDIA_IMAGES)
-                == PackageManager.PERMISSION_GRANTED) {
-                Toast.makeText(this, "Уже есть доступ к галерее", Toast.LENGTH_SHORT).show()
-            } else {
-                requestGalleryPermission.launch(Manifest.permission.READ_MEDIA_IMAGES)
+        // Подписываемся на изменения сети
+        connectivityManager.registerDefaultNetworkCallback(object : ConnectivityManager.NetworkCallback() {
+            override fun onAvailable(network: Network) {
+                runOnUiThread {
+                    tvStatus.text = "Сеть доступна"
+                    Toast.makeText(this@MainActivity, "Подключение появилось", Toast.LENGTH_SHORT).show()
+                }
             }
-        }
+
+            override fun onLost(network: Network) {
+                runOnUiThread {
+                    tvStatus.text = "Сеть недоступна"
+                    Toast.makeText(this@MainActivity, "Подключение потеряно", Toast.LENGTH_SHORT).show()
+                }
+            }
+        })
+    }
+
+    // Проверка текущего состояния сети
+    private fun updateNetworkStatus() {
+        val network = connectivityManager.activeNetwork
+        val caps = connectivityManager.getNetworkCapabilities(network)
+        val connected = caps?.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) == true
+
+        tvStatus.text = if (connected) "Сеть доступна" else "Сеть недоступна"
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index c93e3cf..8c85850 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -4,16 +4,10 @@
     android:orientation="vertical"
     android:padding="16dp">
 
-    <Button
-        android:id="@+id/btnContacts"
+    <TextView
+        android:id="@+id/tvNetworkStatus"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Доступ к контактам" />
-
-    <Button
-        android:id="@+id/btnGallery"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_marginTop="16dp"
-        android:text="Доступ к галерее" />
+        android:text="Проверка сети..."
+        android:textSize="18sp" />
 </LinearLayout>
\ No newline at end of file