Spinner + adapter + custom item layout

different files.java

activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="top"
    android:orientation="vertical">
    <Spinner
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/spin1" />
</LinearLayout>

=========================================================================================

MainActivity.java:

package site.sunmeat.helloworld;

import android.os.Bundle;
import android.view.View;
import android.widget.*;

import androidx.appcompat.app.AppCompatActivity;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Spinner s = findViewById(R.id.spin1);
        var data = new ArrayList<String>();
        data.add("apple");
        data.add("banana");
        data.add("coconut");

        var adapter = new ArrayAdapter<>(this,
                // android.R.layout.simple_list_item_1, // стандартна страшна андроїдівська верстка
                R.layout.my_spinner_item, // кастомна верстка
                R.id.tv1,
                data);
        s.setAdapter(adapter);

        s.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
                Object item = parent.getItemAtPosition(pos);
                Toast.makeText(MainActivity.this, item + "", Toast.LENGTH_SHORT).show();
            }

            public void onNothingSelected(AdapterView<?> parent) {
            }
        });
    }
}

=========================================================================================
  
my_spinner_item.xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tv1"
        android:fontFamily="casual"
        android:textSize="30sp"
        android:textColor="@color/orange"
        android:layout_width="match_parent"
        android:padding="10dp"
        android:layout_height="wrap_content">
    </TextView>
</LinearLayout>