10. Task4Activity.Java

package com.example.laba13_2; import android.content.Context; import android.net.wifi.WifiManager; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; import androidx.appcompat.app.AppCompatActivity; public class Task4Activity extends AppCompatActivity { private Button btnOn, btnOff, btnBack; private WifiManager wifiManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_task4); btnOn = findViewById(R.id.btnOn); btnOff = findViewById(R.id.btnOFF); btnBack = findViewById(R.id.btnBack); wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE); btnOn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { try { if (!wifiManager.isWifiEnabled()) { wifiManager.setWifiEnabled(true); Toast.makeText(getApplicationContext(), "Wi-Fi включается...", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(getApplicationContext(), "Wi-Fi уже включен", Toast.LENGTH_SHORT).show(); } } catch (Exception e) { Toast.makeText(getApplicationContext(), "Ошибка: " + e.getMessage(), Toast.LENGTH_SHORT).show(); } } }); btnOff.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { try { if (wifiManager.isWifiEnabled()) { wifiManager.setWifiEnabled(false); Toast.makeText(getApplicationContext(), "Wi-Fi выключается...", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(getApplicationContext(), "Wi-Fi уже выключен", Toast.LENGTH_SHORT).show(); } } catch (Exception e) { Toast.makeText(getApplicationContext(), "Ошибка: " + e.getMessage(), Toast.LENGTH_SHORT).show(); } } }); btnBack.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); } }); } }

11. Androidmanifest.Xml

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.laba13_2"> <!-- Bluetooth permissions --> <uses-permission android:name="android.permission.BLUETOOTH" /> <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" /> <!-- Wi-Fi permissions --> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" /> <!-- Для совместимости --> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/Theme.AppCompat.Light.DarkActionBar"> <activity android:name=".MainActivity" android:exported="true"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Task1Activity" /> <activity android:name=".Task2Activity" /> <activity android:name=".Task3Activity" /> <activity android:name=".Task4Activity" /> </application> </manifest>