1. 技术文章
  2. Parent click event not firing when recyclerview clicked

Parent click event not firing when recyclerview clicked

由 这一生的挚爱 提交于 2019-11-28 12:00:02

There is a better solution. That is, subclass your CardView:

public class InterceptTouchCardView extends CardView {

    public InterceptTouchCardView(Context context) {
        super(context);
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    /**
     * Intercept touch event so that inner views cannot receive it.
     * 
     * If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
     * touch events will be directly delivered to inner RecyclerView and handled by it. As a result, 
     * parent ViewGroup won't receive the touch event any longer.
     */
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        return true;
    }
}

recyclerView.setLayoutFrozen(true);

just setLayoutFrozen true after setAdapter for recyclerView

In my case, I had a CardView with a couple of buttons and a RecyclerView. With the solutions of ywwynm and Daryl the problem was that the CardView would intercept the events from all of its child views, including the buttons. But what I wanted was for the CardView to intercept the touch events of the RecyclerView only. My solution was the following:

public class UntouchableRecyclerView extends RecyclerView {

    public UntouchableRecyclerView(Context context) {
        super(context);
    }

    public UntouchableRecyclerView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public UntouchableRecyclerView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        return false;
    }
}

I figured out how to get the click event to the RecyclerView's parent. My solution kind of feels like a hack, so I'm hoping that someone can come up with a better solution.

In the RecylerView.Adapter:

@Override
public ViewHolder onCreateViewHolder(final ViewGroup viewGroup, int i) {
    View view = LayoutInflater.from(viewGroup.getContext())
            .inflate(R.layout.my_item_layout, viewGroup, false);

    ViewHolder viewHolder = new ViewHolder(view);

    viewHolder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            viewGroup.callOnClick();
        }
    });
    viewHolder.itemView.setOnLongClickListener(new View.OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
            return viewGroup.performLongClick();
        }
    });

    return viewHolder;
}

I then had to hook up the click event on the RecyclerView:

RecyclerView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        parentView.callOnClick();
    }
});
RecyclerView.setOnLongClickListener(new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View v) {
        return parentView.performLongClick();
    }
});
Derek

@ywwynm, you are on the right track except the solution doesn't allow the nested RecyclerView to scroll. I combined it with the solution here and came up with this solution to handle click and onLongClick events as well as to allow scrolling.

public class InterceptTouchCardView extends CardView {
    private GestureDetector mGestureDetector;
    private boolean mLongClicked;

    public InterceptTouchCardView(Context context) {
        super(context);
        Initialize();
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs) {
        super(context, attrs);
        Initialize();
    }

    public InterceptTouchCardView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        Initialize();
    }

    private void Initialize() {
        mGestureDetector = new GestureDetector(getContext(),
                new GestureDetector.SimpleOnGestureListener() {
                    public boolean onDown(MotionEvent e) {
                        mLongClicked = false;
                        return true;
                    }

                    public void onLongPress(MotionEvent e) {
                        mLongClicked = true;
                        performLongClick();
                    }
                });
    }

    /**
     * Intercept touch event so that inner views cannot receive it.
     *
     * If a ViewGroup contains a RecyclerView and has an OnTouchListener or something like that,
     * touch events will be directly delivered to inner RecyclerView and handled by it. As a result,
     * parent ViewGroup won't receive the touch event any longer.
     *
     * We can't Intercept the touch event if we want to allow scrolling since ACTION_DOWN always
     * happens before ACTION_MOVE.  So handle touch events here since onTouchEvent won't be triggered.
     */
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        mGestureDetector.onTouchEvent(ev);
        if (ev.getAction() == MotionEvent.ACTION_UP && !mLongClicked)
            this.callOnClick();
        return false;
    }
}
标签
android
android-cardview
android-recyclerview
易学教程内所有资源均来自网络或用户发布的内容，如有违反法律规定的内容欢迎反馈！
该文章没有解决你所遇到的问题?点击提问,说说你的问题,让更多的人一起探讨吧!