Final DetailActivity.java - with parallax image scroll

DetailActivity.java

package in.nowke.appbarmiddlelayout;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewTreeObserver;
import android.widget.ImageView;

import com.emilsjolander.components.StickyScrollViewItems.StickyScrollView;

public class DetailActivity extends AppCompatActivity {

    private Toolbar toolbar;
    private StickyScrollView scrollView;
    private ImageView imageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail);

        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setDisplayShowTitleEnabled(false);

        imageView = (ImageView) findViewById(R.id.imageView);
        scrollView = (StickyScrollView) findViewById(R.id.scrollView);
        scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
            @Override
            public void onScrollChanged() {
                int scrollY = scrollView.getScrollY();
                imageView.setTranslationY(scrollY/2);
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_detail, menu);
        return true;
    }
}