Android findViewById cannot resolve variable

Question

I'm pretty new in Android development

I have this Activity class

public class ElencoNotificheActivity extends Activity
{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_elenco_notifiche);
    }
    private void setRefreshListener()
    {
        ListView elencoNotificheView = (ListView)findViewById(R.layout.elencoNotificheView);
    }
}

In my activity class i have the following error:

Error:(18, 71) error: cannot find symbol variable elencoNotificheView

But in my layout XML I have:

        <ListView
            android:id="@+id/elencoNotificheView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:drawSelectorOnTop="true"
            android:divider="@android:color/transparent"
            android:dividerHeight="0dp"
            />

Answer 1

it should be R.id.elencoNotificheView not R.layout. elencoNotificheView R.layout. elencoNotificheView

So your ListView should be like this:

ListView elencoNotificheView = (ListView)findViewById(R.id.elencoNotificheView);

Answer 2

You should have R.id.elencoNotificheView :

private void setRefreshListener()
{
    ListView elencoNotificheView = (ListView)findViewById(R.id.elencoNotificheView);
}

Answer 3

It should be

ListView elencoNotificheView = (ListView)findViewById(R.id.elencoNotificheView);

instead of

ListView elencoNotificheView = (ListView)findViewById(R.layout.elencoNotificheView);

Answer 4

You need fix it below code ..

 private void setRefreshListener()
    {
        ListView elencoNotificheView = (ListView)findViewById(R.layout.elencoNotificheView);
    }

Update

ListView elencoNotificheView = (ListView)findViewById(R.id.elencoNotificheView);