Android using LayoutManagers with RecyclerView

1.LinearLayoutManager is used to display  items in horizontal and vertical scroll.

//initialize recyclerview
  recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

//fixed size of recyclerview layout
  recyclerView.setHasFixedSize(true);

//intialize linear layout manager vertically
  LinearLayoutManager linearVertical = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);


//attach linear layout to recyclerview
  recyclerView.setLayoutManager(linearVertical);


//initialize linear layout manager horizontally
  LinearLayoutManager linearHorizontal = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);

//attach linear layout to recyclerview
  recyclerView.setLayoutManager(linearHorizontal);

//initialize adapter
  notificationAdapter = new NotificationAdapter(MainActivity.this,recyclerView,dat);

//attach adapter to recyclerview
  recyclerView.setAdapter(notificationAdapter)

2.GridLayoutManager is used to display items in a grid.

//here the second parameter is for number of rows.
//third parameter is for horizontal scroll.
//fourth paramter is boolean,when it set to false,layout from start to end
  GridLayoutManager gridHorizontal = new GridLayoutManager(this,2,GridLayoutManager.HORIZONTAL,false);

//attach layout manger to recyclerview
  recyclerView.setLayoutManager(gridLayoutManager);

 //for vertical scroll
  //second parameter is for number of columns  
  GridLayoutManager gridVertical = new GridLayoutManager(this,3,GridLayoutManager.VERTICAL,false);

  recyclerView.setLayoutManager(gridVertical);

3.StaggeredGridLayoutManager is used to display items in staggered grid.

//here first param represents number of columns
//second param represents vertical scroll
  StaggeredGridLayoutManager staggeredGridVertical=new     
  StaggeredGridLayoutManager(2,StaggeredGridLayoutManager.VERTICAL);
  recyclerView.setLayoutManager(staggeredGridVertical);