Menu item on bottom of CollapsingToolbarLayout when expanded

Question

I\'ve been searching for a while as shown on the following images but unfortunately I was not able to find anything similar

edit menu item is moving to

Answer 1

In XML layout:-

Menu item XML:-

In activity:-

public class ScrollingActivity extends AppCompatActivity {

private AppBarLayout app_bar;
private boolean appBarExpanded;
private Menu itemMenu;
private CollapsingToolbarLayout toolbar_layout;
private ImageView img_edit;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scrolling);
    Toolbar toolbar =  findViewById(R.id.toolbar);
    app_bar =  findViewById(R.id.app_bar);
    toolbar_layout =  findViewById(R.id.toolbar_layout);
    img_edit =  findViewById(R.id.img_edit);
    setSupportActionBar(toolbar);

    getSupportActionBar().setDisplayHomeAsUpEnabled(true);


    app_bar.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
        @Override
        public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
            //  Vertical offset == 0 indicates appBar is fully expanded.
            if (Math.abs(verticalOffset) > 200) {
                appBarExpanded = false;
                img_edit.setVisibility(View.GONE);
                invalidateOptionsMenu();
            } else {
                img_edit.setVisibility(View.VISIBLE);
                appBarExpanded = true;
                invalidateOptionsMenu();
            }
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_scrolling,menu);
    itemMenu = menu;
    return true;
}

@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    if (itemMenu != null
            && (!appBarExpanded || itemMenu.size() != 1)) {
        //collapsed
        itemMenu.add("Edit")
                .setIcon(android.R.drawable.ic_menu_edit)
                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
    } else {
        //expanded

    }
    return super.onPrepareOptionsMenu(itemMenu);
}

}

I have not added subtitle with the toolbar. If you need subtitle you have to use some custom view class or library.