activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <FrameLayout
        android:id="@+id/activity_main_container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/activity_main_bottomBar" />

    <com.roughike.bottombar.BottomBar
        android:id="@+id/activity_main_bottomBar"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_alignParentBottom="true"
        app:bb_tabXmlResource="@xml/bottombar_tabs" />

</RelativeLayout>

activity_search.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".ui.search.SearchView"
    android:focusableInTouchMode="true"
    android:id="@+id/cenas">

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/activity_search_query_field"
        android:hint="Movie title"/>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Search"
        android:id="@+id/activity_search_button"/>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/activity_search_list"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

MainActivity.java

public class MainActivity extends BaseActivity {
    @BindView(R.id.activity_main_container) FrameLayout container;
    @BindView(R.id.activity_main_bottomBar) BottomBar bottomBar;

    private int selectedTabId;
    private SearchView searchView;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        searchView = new SearchView(this);
    }

    @Override
    protected void onResume() {
        super.onResume();
        bottomBar.setOnTabSelectListener(tabId -> {
            //if (selectedTabId == tabId) return;
            selectedTabId = tabId;
            container.removeAllViews();
            switch (tabId) {
                case R.id.tab_search:
                    container.addView(searchView);
                    break;
                case R.id.tab_favorites:
                    break;
            }
        });
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        outState.putInt("tabId", selectedTabId);
        super.onSaveInstanceState(outState);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        selectedTabId = savedInstanceState.getInt("tabId");
    }
}

SearchView.java

public class SearchView extends LinearLayout implements LoaderManager.LoaderCallbacks<SearchPresenter> {
    private SearchPresenter presenter;
    private SearchAdapter adapter;

    @BindView(R.id.activity_search_list) RecyclerView recyclerView;
    @BindView(R.id.activity_search_query_field) EditText searchField;
    @BindView(R.id.activity_search_button) Button button;

    private Subscription buttonOnClick;

    public SearchView(Context context) {
        super(context);
        if (context instanceof AppCompatActivity) {
            //hack
            ((AppCompatActivity) context).getSupportLoaderManager().initLoader(0, null, this);
        }
        adapter = new SearchAdapter(getContext());
        LayoutInflater.from(context).inflate(R.layout.activity_search, this, true);
    }

    //Loader Callbacks
    @Override
    public Loader<SearchPresenter> onCreateLoader(int id, Bundle args) {
        return new PresenterLoader<>(getContext(), () -> new SearchPresenter(getContext()));
    }

    @Override
    public void onLoadFinished(Loader<SearchPresenter> loader, SearchPresenter presenter) {
        this.presenter = presenter;
        Timber.i(presenter.toString());
    }

    @Override
    public void onLoaderReset(Loader<SearchPresenter> loader) {}
}