How can i set layoutmanager to RecycleView using kotlin

Question

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

mRecyclerView.setLayoutManager(mLinearLayoutManager);

recyclerView.layoutManager = mLinearLayoutManager – A. Shevchuk Jun 13 '17 at 10:13 — A. Shevchuk, Jun 13 '17 at 10:13

score 31 · Answer 1 · edited Aug 03 '18 at 11:28

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)

Linh · Answer 2 · 2019-06-25T03:37:53.510

13

You can use

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

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

edited Jun 25 '19 at 03:37

answered Jun 13 '17 at 03:15

Linh

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score 3 · Answer 3 · edited Nov 21 '19 at 10:35

3

You can try using below solution

val mRecyclerView= v.findViewById<RecyclerView>(R.id.rec) //id RecyclerView    
mRecyclerView.layoutManager = LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL,false)

edited Nov 21 '19 at 10:35

MashukKhan

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answered Oct 20 '19 at 07:31

erfanhy

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score 1 · Answer 4 · answered Jun 13 '17 at 03:51

You can do like this

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

score 1 · Answer 5 · answered Aug 01 '20 at 05:23

use RecyclerView.HORIZONTAL for AndroidX instead of LinearLayoutManager.HORIZONTAL

var vegetableList: RecyclerView = findViewById(R.id.list_vegetable)
            vegetableList.layoutManager = LinearLayoutManager(this,
            RecyclerView.HORIZONTAL, false)

score 0 · Answer 6 · answered Jun 13 '17 at 05:37

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

score 0 · Answer 7 · answered Jul 23 '17 at 15:34

0

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

answered Jul 23 '17 at 15:34

user2661518

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score 0 · Answer 8 · answered Jul 28 '17 at 18:30

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.

score 0 · Answer 9 · answered Aug 08 '17 at 13:13

0

You can set using this code:

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

answered Aug 08 '17 at 13:13

Dhaval Jivani

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score 0 · Answer 10 · answered Jul 14 '18 at 09:43

0

private var mRecyclerView: RecyclerView? = null

mRecyclerView?.layoutManager = LinearLayoutManager(activity)

answered Jul 14 '18 at 09:43

Shahbaz Ahmed

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Jeffrey · Answer 11 · 2021-07-17T18:28:30.613

Choose the layout:

LinearLayoutManager(context). // vertical
LinearLayoutManager(context, LinearLayoutManager.HORIZONTAL, false) // horizontal
GridLayoutManager(context, numberOfColumns) // grid

Then apply the layout using Kotlin's apply() which removes repetition.

val rv = view.findViewById(R.id.recyclerView) as RecyclerView
rv.apply {
    layoutManager = LinearLayoutManager(context)
    adapter = recyclerViewAdapter()
    setHasFixedSize(true)
    ...
}

It can also be set in XML like this:

app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"

For more info see: here and here.

score 0 · Answer 12 · answered Nov 17 '21 at 07:58

If you are working with Kotlin android.

Declare lateinit variable smoothScroller

lateinit var smoothScroller: SmoothScroller

Within OnCreate Mehtod Initilize the smoothScroller

 override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    smoothScroller = object : LinearSmoothScroller(context) {
        override fun getVerticalSnapPreference(): Int {
            return SNAP_TO_START
        }
    }
}

Finally, Check if the Adopter is Initialized or not? Commit Old dataset changes if there are any. Set the position. Start scroller.

if (this@ChooseTemplate::genericAdapter.isInitialized && this@ChooseTemplate::smoothScroller.isInitialized) {
        this@ChooseTemplate.genericAdapter!!.notifyDataSetChanged()
        smoothScroller.setTargetPosition(this@ChooseTemplate.templatesrowIndex);
        dataBinding!!.rvTemplate.layoutManager!!.startSmoothScroll(this@ChooseTemplate.smoothScroller);
    }

dataBinding is an binding object. rvTemplate is a Recycler View. genericadapter is an adopter for rvTemplate. templatesrowIndex is the index to check which row item is currently selected.

score -1 · Answer 13 · answered Aug 08 '17 at 07:08

-1

recyclerView.layoutManager = LinearLayoutManager(context)

or

recyclerView.layoutManager = GridLayoutManager(context, spanCount)

answered Aug 08 '17 at 07:08

Kay Saith

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This answer doesn't provide move information than already given answers. – Guenther Aug 08 '17 at 07:14

How can i set layoutmanager to RecycleView using kotlin

13 Answers13