我试图访问，在允许相机类的功能，但我得到了上述错误，但当我测试允许相机代码本身它的工作正常。

package com.example.mindsync

// IntroActivity.kt
import android.content.Intent
import android.content.SharedPreferences
import android.os.Bundle
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity

class IntroActivity : AppCompatActivity() {

    private lateinit var sharedPreferences: SharedPreferences
    private lateinit var permissions: AllowingAccessCamera
    private var currentScreen = 1
    private val totalScreens = 2  // Set the total number of introductory screens

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        sharedPreferences = getSharedPreferences("MyPrefs", MODE_PRIVATE)

        // Check if the app is opened for the first time
        if (isFirstTime()) {
            // If it's the first time, show the introductory screens
            showIntroScreen()
        } else {
            // If not the first time, navigate to the main activity or any other desired activity
            startActivity(Intent(this, MainActivity::class.java))
            finish()
        }
    }

    private fun isFirstTime(): Boolean {
        return sharedPreferences.getBoolean("firstTime", true)
    }

    private fun showIntroScreen() {

        // Set the layout for the current intro screens
        when (currentScreen) {
            1 -> setContentView(R.layout.getting_started)
            2 -> setContentView(R.layout.allowing_access_to_camera)
        }

        // Set a click listener on the current screen to move to the next screen
        findViewById<Button>(R.id.getting_started)?.setOnClickListener {
            handleIntroButtonClick()
        }

        findViewById<Button>(R.id.cam_request_permission)?.setOnClickListener {

            permissions = AllowingAccessCamera(this)

            // Permission is not granted, request it
            permissions.requestCameraPermission()
        }
    }

     private fun handleIntroButtonClick() {
            if (currentScreen < totalScreens) {
                currentScreen++
                showIntroScreen()
            } else {
                // Check if the activity is in a valid state
                // Mark that the app has been opened
                val editor = sharedPreferences.edit()
                editor.putBoolean("firstTime", false)
                editor.apply()

                //Transition animation
                overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left)

                // Last screen reached, navigate to the main activity
                startActivity(Intent(this, MainActivity::class.java))
            }
    }

}

个字符
我试着在IntroActivity类中初始化它，但我一直得到空对象引用，问题是代码permissions = AllowingCamera（this）。
谢谢你