Merge "Disable the scrollable ability on app bar area" into sc-dev

import android.widget.SearchView;

import android.widget.TextView;

import androidx.annotation.NonNull;

import androidx.coordinatorlayout.widget.CoordinatorLayout;

import androidx.core.view.ViewCompat;

import androidx.recyclerview.widget.LinearLayoutManager;

import androidx.recyclerview.widget.RecyclerView;

                LinearLayoutManager.VERTICAL, /* reverseLayout */ false));

        mRecyclerView.setAdapter(mAdapter);

        mAppBarLayout = getActivity().findViewById(R.id.app_bar);

        disableToolBarScrollableBehavior();

        // Initialize TimeZoneDataLoader only when mRecyclerView is ready to avoid race

        // during onDateLoaderReady callback.

    public boolean onMenuItemActionExpand(MenuItem item) {

        // To prevent a large space on tool bar.

        mAppBarLayout.setExpanded(false /*expanded*/, false /*animate*/);

        // To prevent user can expand the collpasing tool bar view.

        // To prevent user can expand the collapsing tool bar view.

        ViewCompat.setNestedScrollingEnabled(mRecyclerView, false);

        return true;

    }

    @Override

    public boolean onMenuItemActionCollapse(MenuItem item) {

        // We keep the collapsed status after user cancel the search function.

        mAppBarLayout.setExpanded(false /*expanded*/, false /*animate*/);

        ViewCompat.setNestedScrollingEnabled(mRecyclerView, true);

        return true;

    }

        void onListItemClick(T item);

    }

    private void disableToolBarScrollableBehavior() {

        CoordinatorLayout.LayoutParams params =

                (CoordinatorLayout.LayoutParams) mAppBarLayout.getLayoutParams();

        AppBarLayout.Behavior behavior = new AppBarLayout.Behavior();

        behavior.setDragCallback(

                new AppBarLayout.Behavior.DragCallback() {

                    @Override

                    public boolean canDrag(@NonNull AppBarLayout appBarLayout) {

                        return false;

                    }

                });

        params.setBehavior(behavior);

    }

}