How do I make WRAP_CONTENT work on a RecyclerView

I have a `DialogFragment` that contains a `RecyclerView` (a list of cards). Within this `RecyclerView` are one or more `CardViews` that can have any height. I want to give this `DialogFragment` the correct height based on the `CardViews` that are contained within. Normally this would be simple, I would set `wrap_content` on the `RecyclerView` like this. ``` <android.support.v7.widget.RecyclerView ... xmlns:tools="http://schemas.android.com/tools" android:id="@+id/recycler_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:clickable="true" android:scrollbars="vertical" > </android.support.v7.widget.RecyclerView> ``` Because I am using a `RecyclerView` this does not work: https://issuetracker.google.com/issues/37001674 and Nested Recycler view height doesn't wrap its content On both of these pages people suggest to extend `LinearLayoutManager` and to override `onMeasure()` I first used the LayoutManager that someone provided in the first link: ``` public static class WrappingLayoutManager extends LinearLayoutManager { public WrappingLayoutManager(Context context) { super(context); } private int[] mMeasuredDimension = new int[2]; @Override public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, int widthSpec, int heightSpec) { final int widthMode = View.MeasureSpec.getMode(widthSpec); final int heightMode = View.MeasureSpec.getMode(heightSpec); final int widthSize = View.MeasureSpec.getSize(widthSpec); final int heightSize = View.MeasureSpec.getSize(heightSpec); measureScrapChild(recycler, 0, View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), mMeasuredDimension); int width = mMeasuredDimension[0]; int height = mMeasuredDimension[1]; switch (widthMode) { case View.MeasureSpec.EXACTLY: case View.MeasureSpec.AT_MOST: width = widthSize; break; case View.MeasureSpec.UNSPECIFIED: } switch (heightMode) { case View.MeasureSpec.EXACTLY: case View.MeasureSpec.AT_MOST: height = heightSize; break; case View.MeasureSpec.UNSPECIFIED: } setMeasuredDimension(width, height); } private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec, int heightSpec, int[] measuredDimension) { View view = recycler.getViewForPosition(position); if (view != null) { RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams(); int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec, getPaddingLeft() + getPaddingRight(), p.width); int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec, getPaddingTop() + getPaddingBottom(), p.height); view.measure(childWidthSpec, childHeightSpec); measuredDimension[0] = view.getMeasuredWidth(); measuredDimension[1] = view.getMeasuredHeight(); recycler.recycleView(view); } } } ``` However this did not work because `heightSize = View.MeasureSpec.getSize(heightSpec);` returns a very large value that appear to be related to `match_parent`. By commenting `height = heightSize;` (in the second switch case) I managed to make the height work but only if a `TextView` child inside the `CardView` does not wrap its own text (a long sentence). As soon as that `TextView` wraps it's own text the height SHOULD increase but it doesn't. It calculated the height for that long sentence as a single line, not a wrapped line (2 or more). Any advice on how I should improve this `LayoutManager` so my `RecyclerView` works with `WRAP_CONTENT`? Edit: This layout manager might work for most people, but it still has problems with scrolling and calculating heights of wrapping textviews ``` public class MyLinearLayoutManager extends LinearLayoutManager { public MyLinearLayoutManager(Context context, int orientation, boolean reverseLayout) { super(context, orientation, reverseLayout); } private int[] mMeasuredDimension = new int[2]; @Override public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, int widthSpec, int heightSpec) { final int widthMode = View.MeasureSpec.getMode(widthSpec); final int heightMode = View.MeasureSpec.getMode(heightSpec); final int widthSize = View.MeasureSpec.getSize(widthSpec); final int heightSize = View.MeasureSpec.getSize(heightSpec); int width = 0; int height = 0; for (int i = 0; i < getItemCount(); i++) { measureScrapChild(recycler, i, View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED), mMeasuredDimension); if (getOrientation() == HORIZONTAL) { width = width + mMeasuredDimension[0]; if (i == 0) { height = mMeasuredDimension[1]; } } else { height = height + mMeasuredDimension[1]; if (i == 0) { width = mMeasuredDimension[0]; } } } switch (widthMode) { case View.MeasureSpec.EXACTLY: width = widthSize; case View.MeasureSpec.AT_MOST: case View.MeasureSpec.UNSPECIFIED: } switch (heightMode) { case View.MeasureSpec.EXACTLY: height = heightSize; case View.MeasureSpec.AT_MOST: case View.MeasureSpec.UNSPECIFIED: } setMeasuredDimension(width, height); } private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec, int heightSpec, int[] measuredDimension) { View view = recycler.getViewForPosition(position); if (view != null) { RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams(); int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec, getPaddingLeft() + getPaddingRight(), p.width); int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec, getPaddingTop() + getPaddingBottom(), p.height); view.measure(childWidthSpec, childHeightSpec); measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin; measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin; recycler.recycleView(view); } } } ```