How to set recycler view item width size base on screen size?

Question

I want my RecyclerView item width and height equal and change it's size dynamic for screen size?

how can I do this any advice or sample code please?

Here my code:

    mrv = findViewById(R.id.rv_segments);
    list = new ArrayList<>();
    mAdapter = new SegmentsAdapter(this, list,station.getWidthCount());

    //mAdapter.setOnItemClickListener(this);

    mLayoutManager = new LinearLayoutManager(getApplicationContext());
    mLayoutManager = new GridLayoutManager(getActivity(), station.getWidthCount());


    mrv.setLayoutManager(mLayoutManager);
    mrv.setAdapter(mAdapter);

and here is my adapter:

public SegmentsAdapter.BaseHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view1 = LayoutInflater.from(context).inflate(R.layout.recyler_item_segments,parent,false);
    BaseHolder viewHolder1 = new BaseHolder(view1);
    return viewHolder1;
}

And My recycler item xml like :

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/custom_ln_border"
    android:padding="2dp">
<LinearLayout
    android:id="@+id/ln"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:scaleType="centerCrop"
    android:orientation="horizontal"
    android:background="@color/menu3"
    />
</LinearLayout>

Answer 1

Your Recyclerview should take a LayoutManager with Column Span size Specified in it. which is something like this:

mList.setLayoutManager(new GridLayoutManager(getContext(), 2));

So now you just need to manage Height of the Items. right? This will do:

@Override
public myViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  View myView = inflater.inflate(R.layout.item_home, parent, false);
  GridLayoutManager.LayoutParams params = (GridLayoutManager.LayoutParams) myView.getLayoutParams();
  params.height = (parent.getMeasuredHeight() / 2) - dim24;
  myView.setLayoutParams(params);
  return new myViewHolder(myView);
}

So. this (parent.getMeasuredHeight() / 2) - dim24 is where you can adjust your view "HEIGHT"

And dim24 is just a padding Integer, you can get rid of it

Notice I used "2" Columns so I devided item Heights by "2"

Answer 2

Pls Use ConstraintLayout inside recyclerview item .. Constraints are updated and Better than Relative and Linear Layouts.. Constraint Layout will automatically adjusts based on Screens...