我正在做一个类似于谷歌街景的虚拟导航应用程序。我通过微调器将用户的当前位置和目的地，然后将这些输入转换为字符串。但现在我想在我的NavigationDispalyActivity.kt中使用这些输入，但我不知道如何正确使用Intent。
我的代码
MainActivity.kt

package com.example.collegeroamer

import android.content.Intent
import android.os.Bundle
import android.widget.ImageButton
import android.widget.Spinner
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    private lateinit var navigateButton: ImageButton
    private lateinit var currentLocationSpinner: Spinner
    private lateinit var destinationSpinner: Spinner
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        navigateButton = findViewById(R.id.navigateButton)
        currentLocationSpinner = findViewById(R.id.currentLocationSpinner)
        destinationSpinner = findViewById(R.id.destinationSpinner)

        navigateButton.setOnClickListener {
            val startingLocation = currentLocationSpinner.selectedItem.toString()

            val destination = destinationSpinner.selectedItem.toString()

            val intent = Intent(this, NavigationDisplayActivity::class.java)
            intent.putExtra("selected_location", startingLocation)
            startActivity(intent)
        }
    }
}

字符串
NavigationDisplayActivity.kt

@file:Suppress("UNUSED_EXPRESSION")

package com.example.collegeroamer

import android.os.Bundle
import android.widget.ImageView
import androidx.appcompat.app.AppCompatActivity

class NavigationDisplayActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_image_display)
        val locationImage = findViewById<ImageView>(R.id.locationImage)

        val selectedLocation = intent.getStringExtra("selected_location")
        
        val imageResourceId = getImageResourceIdForLocation(selectedLocation ?: "")
        locationImage.setImageResource(imageResourceId)
    }

    private fun getImageResourceIdForLocation(location: String): Int {
        return when (location) {
            else -> R.drawable.default_image
        }
    }
}

型