lab10

app/src/main/AndroidManifest.xml

@@ -2,6 +2,8 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
     <application
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"

app/src/main/java/com/example/myapplication/MainActivity.kt

@@ -1,74 +1,101 @@
 package com.example.myapplication
 
-import android.content.Context
-import android.hardware.Sensor
-import android.hardware.SensorEvent
-import android.hardware.SensorEventListener
-import android.hardware.SensorManager
+import android.Manifest
+import android.app.NotificationChannel
+import android.app.NotificationManager
+import android.content.pm.PackageManager
+import android.os.Build
 import android.os.Bundle
-import android.widget.TextView
+import android.widget.Button
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.app.ActivityCompat
+import androidx.core.app.NotificationCompat
+import androidx.core.app.NotificationManagerCompat
+import android.app.PendingIntent
+import android.content.Intent
 
-class MainActivity : AppCompatActivity(), SensorEventListener {
+class MainActivity : AppCompatActivity() {
 
-    private lateinit var sensorManager: SensorManager
-    private var accelerometer: Sensor? = null
-    private var lightSensor: Sensor? = null
+    private val channelId = "lab10_channel"
 
-    private lateinit var tvAccelerometer: TextView
-    private lateinit var tvLight: TextView
+    // Лаунчер для запроса разрешений
+    private val requestPermissionLauncher = registerForActivityResult(
+        ActivityResultContracts.RequestPermission()
+    ) { isGranted: Boolean ->
+        if (isGranted) {
+            showNotification()
+        }
+    }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        tvAccelerometer = findViewById(R.id.tvAccelerometer)
-        tvLight = findViewById(R.id.tvLight)
+        createNotificationChannel()
 
-        // Получаем доступ к сенсорам
-        sensorManager = getSystemService(Context.SENSOR_SERVICE) as SensorManager
-        accelerometer = sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
-        lightSensor = sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT)
-
-        // Если сенсор отсутствует
-        if (accelerometer == null) {
-            tvAccelerometer.text = "Акселерометр не поддерживается"
+        val btnNotify: Button = findViewById(R.id.btnNotify)
+        btnNotify.setOnClickListener {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                // Проверяем разрешение
+                if (ActivityCompat.checkSelfPermission(
+                        this,
+                        Manifest.permission.POST_NOTIFICATIONS
+                    ) == PackageManager.PERMISSION_GRANTED
+                ) {
+                    showNotification()
+                } else {
+                    // Запрашиваем разрешение
+                    requestPermissionLauncher.launch(Manifest.permission.POST_NOTIFICATIONS)
                 }
-        if (lightSensor == null) {
-            tvLight.text = "Датчик освещённости не поддерживается"
-        }
-    }
-
-    override fun onResume() {
-        super.onResume()
-        accelerometer?.also {
-            sensorManager.registerListener(this, it, SensorManager.SENSOR_DELAY_NORMAL)
-        }
-        lightSensor?.also {
-            sensorManager.registerListener(this, it, SensorManager.SENSOR_DELAY_NORMAL)
-        }
-    }
-
-    override fun onPause() {
-        super.onPause()
-        sensorManager.unregisterListener(this)
-    }
-
-    override fun onSensorChanged(event: SensorEvent?) {
-        when (event?.sensor?.type) {
-            Sensor.TYPE_ACCELEROMETER -> {
-                val x = event.values[0]
-                val y = event.values[1]
-                val z = event.values[2]
-                tvAccelerometer.text = "Акселерометр:\nX = %.2f\nY = %.2f\nZ = %.2f".format(x, y, z)
-            }
-            Sensor.TYPE_LIGHT -> {
-                val lux = event.values[0]
-                tvLight.text = "Освещённость: $lux люкс"
+            } else {
+                showNotification()
             }
         }
     }
 
-    override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {
+    private fun createNotificationChannel() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val name = "Lab10 Notifications"
+            val descriptionText = "Канал для лабораторной работы 10"
+            val importance = NotificationManager.IMPORTANCE_HIGH
+            val channel = NotificationChannel(channelId, name, importance).apply {
+                description = descriptionText
+            }
+            val notificationManager: NotificationManager =
+                getSystemService(NotificationManager::class.java)
+            notificationManager.createNotificationChannel(channel)
+        }
+    }
+
+    private fun showNotification() {
+        if (ActivityCompat.checkSelfPermission(
+                this,
+                android.Manifest.permission.POST_NOTIFICATIONS
+            ) != PackageManager.PERMISSION_GRANTED
+        ) {
+            return
+        }
+
+        // Интент для открытия MainActivity при клике
+        val intent = Intent(this, MainActivity::class.java).apply {
+            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK
+        }
+        val pendingIntent = PendingIntent.getActivity(
+            this, 0, intent,
+            PendingIntent.FLAG_IMMUTABLE or PendingIntent.FLAG_UPDATE_CURRENT
+        )
+
+        val builder = NotificationCompat.Builder(this, channelId)
+            .setSmallIcon(android.R.drawable.ic_dialog_info)
+            .setContentTitle("Лабораторная работа 10")
+            .setContentText("Это пример уведомления")
+            .setPriority(NotificationCompat.PRIORITY_HIGH)
+            .setContentIntent(pendingIntent)
+            .setAutoCancel(true)
+
+        with(NotificationManagerCompat.from(this)) {
+            notify(1001, builder.build())
+        }
     }
 }

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

@@ -4,15 +4,9 @@
     android:orientation="vertical"
     android:padding="16dp">
 
-    <TextView
-        android:id="@+id/tvAccelerometer"
+    <Button
+        android:id="@+id/btnNotify"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:text="Акселерометр: данные отсутствуют" />
-
-    <TextView
-        android:id="@+id/tvLight"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:text="Освещённость: данные отсутствуют" />
+        android:text="Показать уведомление" />
 </LinearLayout>