click through RecyclerView empty space

Question

I have a layout where a RecyclerView is on top of another layout with a few buttons. The first recycler item is a header with a large top margin to create an empty space above it. Now I want clicks to work through that open space, swiping should also scroll the recycler. The views are in a simple frame.

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <package.FeedBackgroundView
        android:id="@+id/feed_background"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recycler"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:scrollbars="vertical"/>

</FrameLayout>

The recycler consumes all clicks with just top padding or margin. I need clicks to pass through, but swipes should stay in the recycler for scrolling.

Edit:

I have the clicks working, the solution was:

recycler.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            background.dispatchTouchEvent(event);
            return false;
        }
    });

Now I have a problem, since I translate the background (parallax) the clicks aren't arriving on the correct positions. Do I have to translate the events too?

I've solved this problem the same way you have, however it seems as though the dispatched touch events don't always seem to work. It behaves as if there is a touch slop of 0. Have you experienced this, or does anyone know of a solution? — JVillella, Mar 27 '16 at 23:12

score 4 · Accepted Answer · answered May 23 '15 at 15:26

Okay, I solved both issues.

recycler.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
            MotionEvent e = MotionEvent.obtain(event);
            Matrix m = new Matrix();
            m.setTranslate(0f, -backgroundTranslation);
            e.transform(m);
            background.dispatchTouchEvent(e);
            e.recycle();
            return false;
        }
    });

This duplicates the recycler touch event and "fixes" it's position. The translation is translationY for the background.

score 1 · Answer 2 · answered Mar 28 '16 at 01:09

With the answered solution it seems as though the dispatched touch events don't always seem to work. It behaves as if there is a touch slop of 0. I think what's happening is that the RecyclerView is calling requestDisallowInterceptTouchEvent(true); causing intermittent behaviour when there is an ACTION_MOVE event fired.

Instead I got better results with the following:

recycler.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return background.dispatchTouchEvent(event);
    }
});

score -1 · Answer 3 · answered Aug 23 '17 at 10:50

Here are some of the best solutions of RecyclerView Item Click

RecyclerView rvQueues = (RecyclerView) findViewById(R.id.rvQueues);
`rvQueues.addOnItemTouchListener(
                new RecyclerItemClickListener(mActivity, rvQueues, new RecyclerItemClickListener.OnItemClickListener() {
                    @Override
                    public void onItemClick(View view, int position) {
                        //TODO do your stuff

                    }

                    @Override
                    public void onLongItemClick(View view, int position) {
                         //TODO do your stuff
                    }
                })
        );

import android.content.Context; import android.support.v7.widget.RecyclerView; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.View;
public class RecyclerItemClickListener implements RecyclerView.OnItemTouchListener {
    private OnItemClickListener itemClickListener;

    public interface OnItemClickListener {
        public void onItemClick(View view, int position);

        public void onLongItemClick(View view, int position);
    }

    private GestureDetector gestureDetector;

    public RecyclerItemClickListener(Context context, final RecyclerView recyclerView, OnItemClickListener listener) {
        itemClickListener = listener;
        gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
                if (child != null && itemClickListener != null) {
                    itemClickListener.onLongItemClick(child, recyclerView.getChildAdapterPosition(child));
                }
            }
        });
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView view, MotionEvent e) {
        View mChildView = view.findChildViewUnder(e.getX(), e.getY());
        if (mChildView != null && itemClickListener != null && gestureDetector.onTouchEvent(e)) {
            itemClickListener.onItemClick(mChildView, view.getChildAdapterPosition(mChildView));
            return true;
        }
        return false;
    }

    @Override
    public void onTouchEvent(RecyclerView view, MotionEvent motionEvent) {
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
    }
}

click through RecyclerView empty space

3 Answers3

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