Recyclerview height is available with the item adaptive Gridlayoutmanager and Linearlayoutmanager

ScrollView nested Recyclerview, android:layout_height= "wrap_content" does not work, and Recyclerview fills the remaining entire screen space, which is equivalent to Android: Layout_height= "Match_parent" to reset the onmeasure height by overriding the Recyclerview method of Gridlayoutmanager or Linearlayoutmanager.

Here are just a few examples of Gridlayoutmanager, linearlayoutmanager similar

A. Setting LayoutManager

rvPhotos.setLayoutManager(new PhotoLayoutManage(this3));

B.recyclerview's Adapter
Adapter defines the height of the variable in item

privateint itemHeight;publicintgetItemHeightreturn itemHeight;}

Sets the height of the item item display in the Viewholder construction method of the adapter

itemView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {                @Override                publicbooleanonPreDraw() {                    itemHeight=convertView.getMeasuredHeight();                    returntrue;                }            });

C. Custom Gridlayoutmanager override Onmeasure method

 Public  class photolayoutmanage extends gridlayoutmanager{        //Recyclerview height with item adaptive         Public Photolayoutmanage(Context context,intSpancount) {Super(Context,spancount); }@Override         Public void onmeasure(Recyclerview.recycler recycler, Recyclerview.state State,Final intWidthspec,Final intHEIGHTSPEC) {Try{//cannot use view view = recycler.getviewforposition (0);                 //measurechild (view, Widthspec, heightspec);                 //int measuredheight view.getmeasuredheight (); This height is inaccurate.                    if(adapter!=NULL&&adapter.getitemheight () >0) {intMeasuredwidth = View.MeasureSpec.getSize (Widthspec);intMeasuredheight = Adapter.getitemheight () +rvphotos.getpaddingbottom () +rvphotos.getpaddingtop ();intline = Adapter.getitemcount ()/Getspancount ();if(Adapter.getitemcount ()% Getspancount () >0) line++;                    Setmeasureddimension (measuredwidth, measuredheight * line); }Else{Super. Onmeasure (Recycler,state,widthspec,heightspec); }            }Catch(Exception e) {Super. Onmeasure (Recycler,state,widthspec,heightspec); }        }    }

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Recyclerview height is available with the item adaptive Gridlayoutmanager and Linearlayoutmanager