Belajar Android: #99 Membuat Widget Spinner

<Spinner
        android:id="@+id/spinner"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="64dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tv_title_spinner" />

Spinner spinner;

spinner = findViewById(R.id.spinner) //sesuaikan dengan id di layoutnya

String[] buahs = {"Mangga", "Semangka", "Jeruk", "Apel"};

ArrayAdapter<String> adapter = new ArrayAdapter<>(
	this,
  	android.R.layout.simple_spinner_item, //Menggunakan bawaan android
  	buahs
);

spinner.setAdapter(adapter);

<?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SpinnerActivity">

    <TextView
        android:id="@+id/tv_title_spinner"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="64dp"
        android:textStyle="bold"
        android:textSize="20sp"
        android:text="Pilih yang kamu suka"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        />
    <Spinner
        android:id="@+id/spinner"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="64dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tv_title_spinner" />
</androidx.constraintlayout.widget.ConstraintLayout>

package id.my.matsoleh.belajar;

import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class SpinnerActivity extends AppCompatActivity {
    Spinner spinner;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_spinner);

    // Tentukan View
        spinner = findViewById(R.id.spinner);

    //  Sumber Data
        String[] buahs = {"Mangga", "Pisang", "Apel", "Jeruk", "Semangka"};
        
        //   Adapter
        ArrayAdapter<String> adapter = new ArrayAdapter<>(
                this,
                android.R.layout.simple_spinner_item,
                buahs
        );
        
    //  Apply adapter
        spinner.setAdapter(adapter);
        
    }
}