How can I use onItemSelected in Android?

Android Problem Overview

package org.example.mbtiapplication;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;

public class MBTITest extends Activity implements OnItemSelectedListener  {
	
	private Spinner firstSpinner;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_mbtitest);
		
		Spinner firstSpinner = (Spinner) findViewById(R.id.spinner1);
		// Create an ArrayAdapter using the string array and a default spinner layout
		ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
		        R.array.spinnerarraybool, android.R.layout.simple_spinner_item);
		// Specify the layout to use when the list of choices appears
		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
		// Apply the adapter to the spinner
		firstSpinner.setAdapter(adapter);
	}
	
	@Override
	public void onItemSelected(AdapterView<?> parent, View v, int position,
			long id) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void onNothingSelected(AdapterView<?> arg0) {
		// TODO Auto-generated method stub 		
	} 
}

XML Layout:

<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TableRow
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="120dp"
            android:layout_height="match_parent"
            android:layout_marginLeft="5dp"
            android:gravity="center_vertical"
            android:text="I like to go out more than staying home." />

        <Spinner
            android:id="@+id/spinner1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </TableRow>

    <TableRow
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <TextView
            android:layout_width="120dp"
            android:layout_height="match_parent"
            android:layout_marginLeft="5dp"
            android:gravity="center_vertical"
            android:textSize="10.5dp"
            android:text="Sensing v Intuition" />

        <Spinner
            android:id="@+id/spinner2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </TableRow>
</TableLayout>

I'm a new Android programmer and having trouble with using Spinner, i've tried multiple tutorials and still am confused. I'd like to know what my next step is here, as far as I know I have set up my spinner in XML, in Java I have identified that spinner, created an ArrayAdapter for said spinner, and specified some options. I'm not to sure if I have populated the spinner yet or how to manuever with the spinner object. I'd like to be able to use the spinner object to select one of three options and then keep that value inside of the textview inside of the spinner.

Android Solutions

Solution 1 - Android

You're almost there. As you can see, the onItemSelected will give you a position parameter, you can use this to retrieve the object from your adapter, as in getItemAtPosition(position).

Example:

spinner.setOnItemSelectedListener(this);

...

public void onItemSelected(AdapterView<?> parent, View view, int pos,long id) {
    Toast.makeText(parent.getContext(), 
        "OnItemSelectedListener : " + parent.getItemAtPosition(pos).toString(),
        Toast.LENGTH_SHORT).show();
}

This will put a message on screen, with the selected item printed by its toString() method.

Solution 2 - Android

If you don't want to implement the listener, you can set it up like this directly where you want it (call on your spinner after your adapter has been set):

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                switch (position) {
                    case 0:
                        Toast.makeText(parent.getContext(), "Spinner item 1!", Toast.LENGTH_SHORT).show();
                        break;
                    case 1:
                        Toast.makeText(parent.getContext(), "Spinner item 2!", Toast.LENGTH_SHORT).show();
                        break;
                    case 2:
                        Toast.makeText(parent.getContext(), "Spinner item 3!", Toast.LENGTH_SHORT).show();
                        break;
                }
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

               // sometimes you need nothing here
            }
        });

Solution 3 - Android

Another thing: When you have more than one spinner in your layout, you have to implement a switch selection in the onItemSlected() method to know which widget was clicked. Something like this:

@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    switch (parent.getId()){
        case R.id.sp_alarmSelection:
            //Do something
            Toast.makeText(this, "Alarm Selected: " + parent.getSelectedItem().toString(), Toast.LENGTH_SHORT).show();
            break;
        case R.id.sp_optionSelection:
            //Do another thing 
            Toast.makeText(this, "Option Selected: " + parent.getSelectedItem().toString(), Toast.LENGTH_SHORT).show();
            break;
    }
}

Solution 4 - Android

For Kotlin and bindings the code is:

binding.spinner.onItemSelectedListener = object : AdapterView.OnItemSelectedListener{
            override fun onNothingSelected(parent: AdapterView<*>?) {
            }

            override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
            }
        }

Solution 5 - Android

Joseph: spinner.setOnItemSelectedListener(this) should be below Spinner firstSpinner = (Spinner) findViewById(R.id.spinner1); on onCreate

Solution 6 - Android

I think this will benefit you Try this I'm using to change the language in my application

String[] districts;
Spinner sp;

......

 sp = (Spinner) findViewById(R.id.sp);
         districts = getResources().getStringArray(R.array.lang_array);
         ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,districts);
         sp.setAdapter(adapter);
         sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
              @Override
             public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long arg3) {
                  // TODO Auto-generated method stub
                  int index = arg0.getSelectedItemPosition();
                  Toast.makeText(getBaseContext(), "You select "+districts[index]+" id "+position, Toast.LENGTH_LONG).show();
                  switch(position){
                      case 0:
                          setLocal("fr");
                          //recreate();
                          break;
                      case 1:
                          setLocal("ar");
                          //recreate();
                          break;
                      case 2:
                          setLocal("en");
                          //recreate();
                          break;
                      default: //For all other cases, do this
                          setLocal("en");
                          //recreate();
                          break;
                  }
              }
             @Override
            public void onNothingSelected(AdapterView<?> arg0) {
                   // TODO Auto-generated method stub
                         }
        });

and this is my String Array

<string-array name="lang_array">
    <item>french</item>
    <item>arabic</item>
    <item>english</item>
</string-array>

Solution 7 - Android

spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

               //check if spinner2 has a selected item and show the value in edittext
                
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

               // sometimes you need nothing here
            }
        });

spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

               //check if spinner1 has a selected item and show the value in edittext
                
                
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

               // sometimes you need nothing here
            }
        });

Content Type	Original Author	Original Content on Stackoverflow
Question	Joseph Little-Indelible	View Question on Stackoverflow
Solution 1 - Android	bgse	View Answer on Stackoverflow
Solution 2 - Android	Azurespot	View Answer on Stackoverflow
Solution 3 - Android	Jorge Torres	View Answer on Stackoverflow
Solution 4 - Android	Ilja Popov	View Answer on Stackoverflow
Solution 5 - Android	Tuan Do	View Answer on Stackoverflow
Solution 6 - Android	Said Erraoudy	View Answer on Stackoverflow
Solution 7 - Android	Rohit Sharma	View Answer on Stackoverflow