Spinner2

1. activity_main.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"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">

    <TextView
            android:id="@+id/result"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="선택결과"
            android:textSize="24sp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintVertical_bias="0.591"/>

    <Spinner
            android:id="@+id/spinner"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintBottom_toBottomOf="parent"/>
</androidx.constraintlayout.widget.ConstraintLayout>

 

2. build.gradle에 추가(Sync Now 꼭 해주기)

buildFeatures{
    viewBinding true
}

 

3. app - src - res - layout 우클릭후 새로만들기 - XML - Layout XML File - item_spinner로 생성

item_spinner

<?xml version="1.0" encoding="utf-8"?>
<TextView
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/tvItemSpinner"
        android:layout_width="match_parent"
        android:layout_height="45dp"
        android:paddingTop="10dp"
        android:paddingStart="30dp"
        android:textColor="@android:color/black"
        android:textSize="15sp"
        android:paddingLeft="30dp"/>

 

4. MainActivity.kt

class MainActivity : AppCompatActivity() {

    val binding by lazy { ActivityMainBinding.inflate(layoutInflater) }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        //setContentView(R.layout.activity_main)
        setContentView(binding.root)

        var data = listOf("선택하세요", "1월", "2월", "3월", "4월", "5월", "6월")

        var adapter = ArrayAdapter<String>(this, R.layout.item_spinner, data)
        binding.spinner.adapter = adapter

        binding.spinner.onItemSelectedListener = object :AdapterView.OnItemSelectedListener{
            override fun onItemSelected(p0: AdapterView<*>?, p1: View?, pos: Int, p3: Long) {
                binding.result.text = data.get(pos)
            }

            override fun onNothingSelected(p0: AdapterView<*>?) {

            }
        }
    }
}