CODEWITHSUNDEEP
android
Seph Irockthis
Seph Irockthis

Reputation: 37

Spinner listener not working

my app crashes with this code.. it doesnt even start up.. any ideas guys thanks my app crashes with this code.. it doesnt even start up.. any ideas guys thanks

package com.about.bysk;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.Spinner;
import android.widget.Toast;

public abstract class AboutActivity extends Activity implements
        OnItemSelectedListener {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Spinner spinner = (Spinner) findViewById(R.id.spin);
        spinner.setOnItemSelectedListener(new OnItemSelectedListener() {

            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                Toast.makeText(null, "a", 5);

            }

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

            }
        });
    }
}

this makes my app crash. please help..

Upvotes: 0

Views: 1952

Answers (3)

Dheeresh Singh
Dheeresh Singh

Reputation: 15701

you have not set the lisnter to spinner

as per you code do as below ...

1-public class AboutActivity extends Activity implement OnItemSelectedListener{

2- spinner.setOnItemSelectedListener(this);

3- Toast.makeText(AboutActivity.this,"RootBox",Toast.LENGTH_LONG).show();

you can't pass null as context to Toast 

Toast.makeText(AboutActivity.this, "a", Toast.LENGTH_LONG).show();

Upvotes: 0

Simon Dorociak
Simon Dorociak

Reputation: 33505

You have to set Listener for your spinner and your class must implement OnItemSelectedListener

public class YourClass extends Activity implements OnItemSelectedListener { ... }

Then you must set Listener for your spinner:

spinner.setOnItemSelectedListener(this);

Or you can use it like anonymous class

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

    @Override
    public void onNothingSelected(AdapterView<?> parentView) { ... }
});

Note: If you want to show Toast, you must call show() method.

Upvotes: 1

LuminiousAndroid
LuminiousAndroid

Reputation: 1577

You forgot to setlistner ... Also you din call show method with toast !!

Upvotes: 0

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