How to display text in Spinner ?

Hello,

This article is for Beginner and people who want to learn Android .This article is about display text in Spinner.

1. XML File .

activity_main -

<LinearLayout
    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:orientation="vertical"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <Spinner
        android:id="@+id/spinner"
        android:layout_marginTop="20dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></Spinner>

</LinearLayout>

2.Java File.

MainActivity-

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    //declare variable
    Spinner spinner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
        spinner=findViewById(R.id.spinner);
        //String array
        String [] countries={"India","Us","UK","Ireland"};
        ArrayAdapter<String>adapter=new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item,countries);
        spinner.setAdapter(adapter);

}
}