android RecyclerView change grid list code example

Example 1: how to set number of columns in recyclerview android

recyclerView.setLayoutManager(new GridLayoutManager(this, 2));

Example 2: android recyclerview how to combine row and grid

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Create a grid layout with two columns
        GridLayoutManager layoutManager = new GridLayoutManager(this, 2);

        // Create a custom SpanSizeLookup where the first item spans both columns
        layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
            @Override
            public int getSpanSize(int position) {
                return position == 0 ? 2 : 1;
            }
        });

        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setAdapter(new MyGridAdapter());
    }