MovieFragment.java

public class MovieFragemnt {


@Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
      
        // Create new instance of layout manager
        final StaggeredGridLayoutManager mStaggeredLayoutManger = new StaggeredGridLayoutManager(getNumberOfColumns(), StaggeredGridLayoutManager.VERTICAL);
        // Set the layout manger
        mMovieRecycleView.setLayoutManager(mStaggeredLayoutManger);
        mMovieRecycleView.setHasFixedSize(false);
        // Call is actually only necessary with custom ItemAnimators
        mMovieRecycleView.setItemAnimator(new DefaultItemAnimator());
        // Create new adapter
        mMovieAdapter = new MovieAdapter(mMovieList, getContext(), getActivity());
        // Associate RecycleView with adapter
        mMovieRecycleView.setAdapter(mMovieAdapter);
    }
    
// Get the no. of grid columns to use
    protected int getNumberOfColumns() {
        // The number of grid columns
        int numberColumns = 2;
        // Check if we are in landscape
        if (ScreenUtility.isInLandscapeOrientation(getContext())) {
            numberColumns = 3;
        }
        // Return the no. of columns
        return numberColumns;
    }
}

ScreenUtility.java

/**
 * Provides utility methods for working with the device screen.
 */
public class ScreenUtility {

/**
     * @param context Context instance
     *
     * @return [true] if the device is in landscape orientation, [false] otherwise.
     */
    public static boolean isInLandscapeOrientation(Context context) {
        Configuration configuration = context.getResources().getConfiguration();
        return configuration.orientation == Configuration.ORIENTATION_LANDSCAPE;
    }
    
}

An example of how to dynamically assign no. of grid columns in RecycleView