Spinner 어댑터에 연결하면 프로그램이 죽습니다 [closed]

Question

arrays.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="protocols">
    <item>ONE</item>
</string-array>
</resources>

item_spinner.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">

<TextView
    android:id="@+id/txt_name"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    tools:ignore="MissingConstraints" />
</androidx.constraintlayout.widget.ConstraintLayout>

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">
<LinearLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <Spinner android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/spinner"/>
    <Button android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/ok"
        android:text="OK"/>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt
class MainActivity : AppCompatActivity(), View.OnClickListener {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val btnOk = findViewById<Button>(R.id.ok)
        btnOk.setOnClickListener(this)

        val spinner:Spinner = findViewById<Spinner>(R.id.spinner)
        val sData = resources.getStringArray(R.array.protocols)
        var adapter = ArrayAdapter<String>(this, R.layout.item_spinner, sData)
        spinner.adapter = adapter
    }

    override fun onClick(v: View) {
    }
}

spinner.adapter = adapter 이부분에서 계속 앱이 크래쉬됩니다. 도와주세요..

Answer 1

원인을 찾았네요....