Camera Permission in android/kotlin

cameraPermission

MainActivity.kt:

package com.example.permission

import android.Manifest
import android.content.Intent
import android.content.pm.PackageManager
import android.graphics.Bitmap
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.provider.MediaStore
import android.widget.Button
import android.widget.ImageView
import android.widget.Toast
import androidx.activity.result.contract.ActivityResultContracts

class MainActivity : AppCompatActivity() {
    lateinit var imageView:ImageView
    lateinit var button:Button
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        init()
    }
    private fun init(){
        bindView()
        button.setOnClickListener { chackandOpencamera() }
    }

    fun bindView(){
        button = findViewById(R.id.button)
        imageView = findViewById(R.id.imageView)
    }

    val requestPermissionLauncher =
        registerForActivityResult(
            ActivityResultContracts.RequestPermission()
        ) { isGranted: Boolean ->
            if (isGranted) {
                opencamera()
            } else {
                Toast.makeText(this,"permission deind",Toast.LENGTH_LONG).show()
            }
        }

    fun chackandOpencamera(){
        val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)

        // Register the permissions callback, which handles the user's response to the
// system permissions dialog. Save the return value, an instance of
// ActivityResultLauncher. You can use either a val, as shown in this snippet,
// or a lateinit var in your onAttach() or onCreate() method.

        if(checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED){
            opencamera()
        }else{
            requestPermissionLauncher.launch(Manifest.permission.CAMERA)
        }
    }
    fun opencamera(){
        val takePictureIntent = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
        requestImageCapture.launch(takePictureIntent)
    }

    val requestImageCapture = registerForActivityResult(ActivityResultContracts.StartActivityForResult()){result ->
        if (result.resultCode == RESULT_OK && result.data != null){
            val img = result.data?.extras!!["data"] as Bitmap
            imageView.setImageBitmap(img)
        }
    }
}

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activity_main.xml:

<?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"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="129dp"
        android:text="Button"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="207dp"
        android:layout_height="204dp"
        android:layout_marginTop="4dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@tools:sample/avatars" />
</androidx.constraintlayout.widget.ConstraintLayout><?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"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="129dp"
        android:text="Button"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="207dp"
        android:layout_height="204dp"
        android:layout_marginTop="4dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@tools:sample/avatars" />
</androidx.constraintlayout.widget.ConstraintLayout>

____________________________________________________________

androidManifest:

    <uses-feature android:name="android.hardware.camera"
        android:required="true" />
    <uses-permission android:name="android.permission.CAMERA"/>