Android Spinner Example
Android Spinner is like the combox box of AWT or Swing. It can be used to display the multiple options to the user in which only one item can be selected by the user.
Android spinner is like the drop down menu with multiple values from which the end user can select only one value.
Android spinner is associated with AdapterView. So you need to use one of the adapter classes with spinner.
Android Spinner class is the subclass of AsbSpinner class.
Android Spinner Example
In this example, we are going to display the country list. You need to use ArrayAdapter class to store the country list.
Let's see the simple example of spinner in android.
activity_main.xml
Drag the Spinner from the pallete, now the activity_main.xml file will like this:
File: activity_main.xml
- <?xml version="1.0" encoding="utf-8"?>
- <android.support.constraint.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="example.javatpoint.com.spinner.MainActivity">
-
- <Spinner
- android:id="@+id/spinner"
- android:layout_width="149dp"
- android:layout_height="40dp"
- android:layout_marginBottom="8dp"
- android:layout_marginEnd="8dp"
- android:layout_marginStart="8dp"
- android:layout_marginTop="8dp"
- app:layout_constraintBottom_toBottomOf="parent"
- app:layout_constraintEnd_toEndOf="parent"
- app:layout_constraintHorizontal_bias="0.502"
- app:layout_constraintStart_toStartOf="parent"
- app:layout_constraintTop_toTopOf="parent"
- app:layout_constraintVertical_bias="0.498" />
-
- </android.support.constraint.ConstraintLayout>
Activity class
Let's write the code to display item on the spinner and perform event handling.
File: MainActivity.java
- package example.javatpoint.com.spinner;
-
- 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.Spinner;
- import android.widget.Toast;
-
- public class MainActivity extends AppCompatActivity implements
- AdapterView.OnItemSelectedListener {
- String[] country = { "India", "USA", "China", "Japan", "Other"};
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
-
- Spinner spin = (Spinner) findViewById(R.id.spinner);
- spin.setOnItemSelectedListener(this);
-
-
- ArrayAdapter aa = new ArrayAdapter(this,android.R.layout.simple_spinner_item,country);
- aa.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
-
- spin.setAdapter(aa);
-
- }
-
-
- @Override
- public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long id) {
- Toast.makeText(getApplicationContext(),country[position] , Toast.LENGTH_LONG).show();
- }
- @Override
- public void onNothingSelected(AdapterView<?> arg0) {
-
- }
- }
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