How can i set layoutmanager to RecycleView using kotlin

How can i set layoutmanager to RecycleView using kotlin as java code below:

mRecyclerView.setLayoutManager(mLinearLayoutManager);

You can do like this

val linearLayoutManager = LinearLayoutManager(this)
linearLayoutManager.orientation = LinearLayoutManager.VERTICAL
recyclerview!!.layoutManager = linearLayoutManager
recyclerview!!.isNestedScrollingEnabled = true
recyclerview!!.setHasFixedSize(true)

Simply write this to set `LayoutManager`

// Define this globally
lateinit var recyclerView: RecyclerView

// Initialize this after `activity` or `fragment` is created
recyclerView = findViewById(R.id.recyclerView) as RecyclerView

recyclerView.setHasFixedSize(true)
recyclerView.layoutManager = LinearLayoutManager(activity!!) as RecyclerView.LayoutManager

I had same issue, reason was I had initialize recyclerView as

var recyclerView = findViewById<View>(R.id.recycleView)

Make sure you initialize as below

var recyclerView = findViewById<View>(R.id.recycleView) as RecyclerView

Apply plugin in your app build

apply plugin: 'kotlin-android-extensions'

For my case view id of `RecyclerView` is `my_recycler_view`.

In your java file write -

my_recycler_view.layoutManager = LinearLayoutManager(context)

By default `LinearLayoutManager(context)` will set vertical orientation, update it as per need.

```recyclerView.layoutManager = LinearLayoutManager(context)
```

or

```recyclerView.layoutManager = GridLayoutManager(context, spanCount)
```

You can set using this code:

binding.recyclerView.setHasFixedSize(true)
binding.recyclerView.layoutManager = LinearLayoutManager(this ,LinearLayoutManager.VERTICAL ,false)
binding.recyclerView.adapter = customAdapter(this ,getList())

private var mRecyclerView: RecyclerView? = null

mRecyclerView?.layoutManager = LinearLayoutManager(activity)

Following two lines sets ***orientation*** to ***vertical***

mRecyclerView.layoutManager = LinearLayoutManager(this, LinearLayoutManager.VERTICAL ,false)

OR

mRecyclerView.layoutManager = LinearLayoutManager(this)
mRecyclerView.layoutManager = LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL ,false)

sets horizontal orientation

To set grid layout,

mRecyclerView.layoutManager = GridLayoutManager(this, spanCount)

You can use

recyclerView.layoutManager = LinearLayoutManager(context) // default orientation is vertical

// if you want horizontal recyclerview
// recyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.HORIZONTAL, false)