MainActivity.java

package github.nisrulz.parallaxheaderlistview;

import android.os.Bundle;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.CoordinatorLayout;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    Toolbar androidToolbar;
    CollapsingToolbarLayout mCollapsingToolbarLayout;
    CoordinatorLayout mRootLayout;
    ListView mListView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initToolbar();
        initOtherLayoutInstances();
        initListview();
    }

    private void initToolbar() {
        androidToolbar = (Toolbar) findViewById(R.id.toolbar_android);
        setSupportActionBar(androidToolbar);
    }

    private void initOtherLayoutInstances() {
        mRootLayout = (CoordinatorLayout) findViewById(R.id.coordinatorRootLayout);
        mCollapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsingToolbarLayoutAndroidExample);
        mCollapsingToolbarLayout.setTitle("Parallax Header Listview");
    }

    private void initListview() {
        mListView = (ListView) findViewById(R.id.listView);
        String[] listStringValue = new String[]{"Item 1", "Item 2", "Item 3", "Item 4", "Item 5",
                "Item 6", "Item 7", "Item 8", "Item 9", "Item 10", "Item 11", "Item 12", "Item 13",
                "Item 14", "Item 15", "Item 16", "Item 17", "Item 18", "Item 19", "Item 20",
                "Item 21", "Item 22", "Item 23", "Item 24", "Item 25"
        };

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, listStringValue);

        mListView.setAdapter(adapter);

        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                int itemPosition = position;
                String itemValue = (String) mListView.getItemAtPosition(position);
                Toast.makeText(getApplicationContext(),
                        "Position :" + itemPosition + "  Text : " + itemValue, Toast.LENGTH_LONG).show();
            }

        });
    }
}