Recyclerview长按项目选择 [英] Recyclerview on item selection with long click

问题描述

我有回收站视图，我解析了jsonArray中的数据并将其显示为列表.现在我想在长按我已经编码好长按的位置时高亮显示该行.如何高亮显示所选的行.请帮助我就是这个.

I have recycler view and i parse data from jsonArray and display it as lists.now i want to highlight the row when I long click on a position i have already coded for long click.How to highlight the selected row.please help me with this.

recyclerView.addOnItemTouchListener(new RecyclerTouchListener(getApplicationContext(), recyclerView, new ClickListener() {
                @Override
                public void onClick(View view, int position) {

                }

                @Override
                public void onLongClick(View view, int position) {
                    Toast.makeText(MainActivity.this, "long clicked", Toast.LENGTH_SHORT).show();

                }
            }));

推荐答案

定义一个类

public class RecyclerViewItemClickListener implements RecyclerView.OnItemTouchListener {

    //GestureDetector to detect touch event.
    private GestureDetector gestureDetector;
    private QueriesListFragment.ClickListener clickListener;

    public RecyclerViewItemClickListener(Context context, final RecyclerView recyclerView, final QueriesListFragment.ClickListener clickListener) {
        this.clickListener = clickListener;
        gestureDetector = new GestureDetector(context, new GestureDetector.SimpleOnGestureListener() {
            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                //Find child on x and y position relative to screen
                View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
                if (child != null && clickListener != null) {
                    clickListener.onLongClick(child, recyclerView.getChildLayoutPosition(child));
                }
            }
        });
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {
        //On Touch event
        View child = rv.findChildViewUnder(e.getX(), e.getY());
        if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
            clickListener.onClick(child, rv.getChildLayoutPosition(child));
        }
        return false;
    }

    @Override
    public void onTouchEvent(RecyclerView rv, MotionEvent e) {
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

    }
}

定义接口

public interface ClickListener {
    void onClick(View view, int position);

    void onLongClick(View view, int position);
}

将此分配给回收者视图

myRecyclerView.addOnItemTouchListener(new RecyclerViewItemClickListener(getActivity(), mQueriesListRecyclerView, new ClickListener() {
        @Override
        public void onClick(View view, int position) {
            //triggers when click
        }

        @Override
        public void onLongClick(View view, int position) {
             //triggers when you long press
        }
    }));

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