How to Use Spinner and add Drop Down List Items in Android Studio?

In Android, Spinner is used to select one value from a Spinner using a drop down list.

Android spinner is associated with AdapterView. So we need to set the adapter class with the Spinner.

MainActivity.java

package com.example.spinner;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {
Spinner spinner;
TextView textView,textView1;
String str[]={"PHP","JAVA","ANDROID","JAVA SCRIPT","JQUERY"};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spinner=findViewById(R.id.spinner);
textView=findViewById(R.id.textview);
textView1=findViewById(R.id.textview1);
ArrayAdapter arrayAdapter=new ArrayAdapter(this,android.R.layout.simple_dropdown_item_1line,str);
spinner.setAdapter(arrayAdapter);
}
}
 

XML Design

<?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="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"

        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.549"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.36">

        <TextView
            android:id="@+id/textview"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="50dp"
            android:text="Spinner"
            android:textColor="#F10909"
            android:textSize="23dp"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/textview1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginRight="60dp"
            android:textSize="15dp"
            android:textColor="#110000"
            android:text="Courses :" />

        <Spinner
            android:id="@+id/spinner"
            android:layout_width="200dp"
            android:layout_height="40dp"
            android:layout_margin="10dp"
            android:textColor="#FBFBFB" />
    </LinearLayout>


</androidx.constraintlayout.widget.ConstraintLayout>

Code Result