Dynamically change the Span of Grid Layout in Recycler View according to Screen size

GridLayout.java

private RecyclerView mRecyclerView;

@Nullable

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

View view = inflater.inflate(R.layout.fragment_view, container, false);

mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_view);

// ommiting other recycler view set up, such as adapter and Layout manager set up ..

ViewTreeObserver viewTreeObserver = mRecyclerView.getViewTreeObserver();

viewTreeObserver.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

@Override

public void onGlobalLayout() {

calculateCellSize();

}

});

}

private static final int sColumnWidth = 120; // assume cell width of 120dp

private void calculateSize() {

int spanCount = (int) Math.floor(mRecyclerView.getWidth() / convertDPToPixels(sColumnWidth));

((GridLayoutManager) mRecyclerView.getLayoutManager()).setSpanCount(spanCount);

}

private float convertDPToPixels(int dp) {

DisplayMetrics metrics = new DisplayMetrics();

getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);

float logicalDensity = metrics.density;

return dp * logicalDensity;

}