Recyclerview not call any Adapter method :onCreateViewHolder,onBindViewHolder,

Question

my RecyclerView do not call onCreateViewHolder, onBindViewHolder, therefore, does not appear nothing in recyclerview. I put logs for debugging, and no log is shown. What can

Answer 1

In my case i had this structure

<ScrollView>
    <RelativeLayout>
        <android.support.v7.widget.RecyclerView/>

    </RelativeLayout>
</ScrollView>

i solved the problem remove Relative

<ScrollView>

        <android.support.v7.widget.RecyclerView/>

</ScrollView>

Answer 2

Is kind of silly, but another thing that can block the calls to the methods is to declare the visibility of the view as GONE.

android:visibility="gone"

recyclerView.setVisibility(View.GONE);

Any of these will block the call of the methods in RecyclerView.Adapter

I hope it can help someone.

Answer 3

Might have been a different case but for me I just forgot to set the Layout Manager as follows:

LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity());
recycler.setLayoutManager(layoutManager);

Hope it helps :)

Answer 4

Its late but hope it will help somone. try either of the following:

first solution: make sure you haven't use this line unnecessarily

recyclerView.setHasFixedSize(true);

second solution: make sure you set layout manager to recyclerView

recycler.setLayoutManager(new LinearLayoutManager(this));

third solution: you getItemCount returns 0, So RecyclerView never tries to instantiate a view. Make it return something greater than 0

Answer 5

If RecyclerView gets put into a ScrollView, then during measure step its height is unspecified (because ScrollView allows any height) and gets equal to minimum height (as per implementation) which is apparently zero.

ref : android: RecyclerView inside a ScrollView

Solution : - put views in row of RecyclerViews - Calculate the size of the list items and set the height of the ListView programmatically http://vardhan-justlikethat.blogspot.com/2014/04/android-listview-inside-scrollview.html

Answer 6

In my Case I was using Fragment-> ViewPager and Tablayout -> Inside viewpagers item I used RecyclerView.

So Instead of calling ViewPagerAdapter(getChildFragmentManager()) , I was calling ViewPagerAdapter(getSupportFragmentManager()) , that is why any of my recycler adapter item is not getting called.

So proper way to set the ViewPagerAdapter within a fragment is

ViewPagerAdapter(getChildFragmentManager())