Force Recyclerview To Bottom Of Page In Layout

I have a page that consists of an ImageView, and a RecyclerView. The RecyclerView contains a small number of items (currently three) and only takes up around a quarter of the scree

Solution 1:

Many thanks to everyone who contributed, but I have found a programmatic solution outside of the layout files. In case anyone else is looking for a solution to this problem, I found one here.

It appears as if there is an issue with RecyclerView currently where it doesn't wrap content. The answer is to construct a custom class that extends LinearLayoutManager. I have posted the solution that worked for me below - most of it is copy and pasted from the answer given in the link I quoted. The only small issue is that it doesn't account for the extra space added by decorations, which is why I had to make a small tweak to the following line near the end of the code:

//I added the =2 at the end.    
measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin + 2;

Here is the code in its entirety:

publicclassHomeLinearLayoutManagerextendsLinearLayoutManager{

    HomeLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }

    privateint[] mMeasuredDimension = newint[2];

    @OverridepublicvoidonMeasure(RecyclerView.Recycler recycler, RecyclerView.State state,
                          int widthSpec, int heightSpec) {
        finalintwidthMode= View.MeasureSpec.getMode(widthSpec);
        finalintheightMode= View.MeasureSpec.getMode(heightSpec);
        finalintwidthSize= View.MeasureSpec.getSize(widthSpec);
        finalintheightSize= View.MeasureSpec.getSize(heightSpec);
        intwidth=0;
        intheight=0;
        for (inti=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);
    }

    privatevoidmeasureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec,
                                   int heightSpec, int[] measuredDimension) {
        Viewview= recycler.getViewForPosition(position);
        if (view != null) {
            RecyclerView.LayoutParamsp= (RecyclerView.LayoutParams) view.getLayoutParams();
            intchildWidthSpec= ViewGroup.getChildMeasureSpec(widthSpec,
                    getPaddingLeft() + getPaddingRight(), p.width);
            intchildHeightSpec= 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 + 2;
            recycler.recycleView(view);
        }
    }
}

Thanks again.

Solution 2:

Put the two in a RelativeLayout and make ImageView fill parent:

<RelativeLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"><RecyclerViewandroid:id="@+id/recyclerView"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_alignParentBottom="true"/><ImageViewandroid:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_above="@id/recyclerView"
    /></RelativeLayout>

Edit: Wrote TextView by accident. Fixed.

Solution 3:

The only solution I can think of is using layout weight. Specify 70% of the screen for the image and 30% for the Recyclerview as you said you have just 3 rows. Use adjustViewByBounds to ensure the images aspect ratio is maintained.

My code below:

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><ImageViewandroid:src="@drawable/ic_round_button"android:layout_width="wrap_content"android:layout_height="wrap_content"android:adjustViewBounds="true"android:layout_weight=".9"/><android.support.v7.widget.RecyclerViewandroid:id="@+id/recyclerView"android:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight=".1"/></LinearLayout>