lab5

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

@@ -1,55 +1,58 @@
 package com.example.myapplication
 
+import android.Manifest
+import android.content.pm.PackageManager
+import android.graphics.Bitmap
 import android.os.Bundle
 import android.widget.Button
-import android.widget.EditText
-import android.widget.TextView
+import android.widget.ImageView
 import android.widget.Toast
 import androidx.activity.ComponentActivity
-import java.io.File
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.core.content.ContextCompat
 
 class MainActivity : ComponentActivity() {
 
-    private lateinit var etInput: EditText
-    private lateinit var btnSave: Button
-    private lateinit var btnLoad: Button
-    private lateinit var tvResult: TextView
+    private lateinit var btnCamera: Button
+    private lateinit var imageView: ImageView
 
-    private val fileName = "myfile.txt"
+    // Новый контракт
+    private val takePicturePreview = registerForActivityResult(
+        ActivityResultContracts.TakePicturePreview()
+    ) { bitmap: Bitmap? ->
+        if (bitmap != null) {
+            imageView.setImageBitmap(bitmap)
+        } else {
+            Toast.makeText(this, "Фото не получено", Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    // Запрос разрешения на камеру
+    private val requestCameraPermission = registerForActivityResult(
+        ActivityResultContracts.RequestPermission()
+    ) { granted ->
+        if (granted) {
+            takePicturePreview.launch(null)
+        } else {
+            Toast.makeText(this, "Разрешение на камеру не выдано", Toast.LENGTH_SHORT).show()
+        }
+    }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        etInput = findViewById(R.id.etInput)
-        btnSave = findViewById(R.id.btnSave)
-        btnLoad = findViewById(R.id.btnLoad)
-        tvResult = findViewById(R.id.tvResult)
+        btnCamera = findViewById(R.id.btnCamera)
+        imageView = findViewById(R.id.imageView)
 
-        btnSave.setOnClickListener { saveToFile() }
-        btnLoad.setOnClickListener { loadFromFile() }
-    }
-
-    private fun saveToFile() {
-        val text = etInput.text.toString()
-        if (text.isEmpty()) {
-            Toast.makeText(this, "Введите текст", Toast.LENGTH_SHORT).show()
-            return
-        }
-
-        val file = File(filesDir, fileName)
-        file.writeText(text)
-
-        Toast.makeText(this, "Файл сохранён", Toast.LENGTH_SHORT).show()
-    }
-
-    private fun loadFromFile() {
-        val file = File(filesDir, fileName)
-        if (file.exists()) {
-            val content = file.readText()
-            tvResult.text = "Содержимое файла: $content"
-        } else {
-            tvResult.text = "Файл не найден"
+        btnCamera.setOnClickListener {
+            if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
+                == PackageManager.PERMISSION_GRANTED
+            ) {
+                takePicturePreview.launch(null)
+            } else {
+                requestCameraPermission.launch(Manifest.permission.CAMERA)
+            }
         }
     }
 }