Question

这是我的MainActivity RecyclerView addOnItemTouchListener实现。

recyclerView.addOnItemTouchListener(new RecyclerViewTouchListener(this, recyclerView, new NewAlbumAdapter.RecyclerViewClickListener() {
            @Override
            public void onClick(View view, int position) {
                String[] allImagePathListInAnAlbum;
                Log.e("Item Clicked is","++++ "+allAlbumsName[position]);
                Log.e("Item Number is", "++++ " +String.valueOf(position));
                allImagePathListInAnAlbum=filePathToAllAlbums[position].list();
                Intent insideAlbumIntent=new Intent(getApplicationContext(), ImagesInsideAlbumMainActivity.class);
                insideAlbumIntent.putExtra("AllImagePath",allImagePathListInAnAlbum);
                startActivity(insideAlbumIntent);

            }

            @Override
            public void onLongClick(View view, int position) {
                Toast.makeText(getApplicationContext(),allAlbumsName[position]+" Is Long clicked\nAt Position: "+String.valueOf(position),Toast.LENGTH_SHORT).show();


            }
        }));

这是我实施的RecyclerViewTouchListener。

public class RecyclerViewTouchListener implements RecyclerView.OnItemTouchListener{

    private GestureDetector gestureDetector;
    private NewAlbumAdapter.RecyclerViewClickListener clickListener;

    public RecyclerViewTouchListener(Context context, final RecyclerView recyclerView, final NewAlbumAdapter.RecyclerViewClickListener 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) {
                View child = recyclerView.findChildViewUnder(e.getX(), e.getY());
                if (child != null && clickListener != null) {
                    clickListener.onLongClick(child, recyclerView.getChildPosition(child));
                }
            }
        });
    }

    @Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {

        View child = rv.findChildViewUnder(e.getX(), e.getY());
        if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
            clickListener.onClick(child, rv.getChildPosition(child));
        }
        return false;
    }

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

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {    }

}

当我点击以前在RecyclerView中添加的项目时，点击工作正常。只调用一次onClick。

但是当我将一个项目添加到RecyclerView并单击新创建的项目时，会调用onClick方法两次。

@Override
    public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {

        View child = rv.findChildViewUnder(e.getX(), e.getY());
        if (child != null && clickListener != null && gestureDetector.onTouchEvent(e)) {
            clickListener.onClick(child, rv.getChildPosition(child));
        }
        return false;
    }

从中返回False。它在RecyclerView中使用此方法：我运行了调试器，我评论了一些事情的价值观：

if (action != MotionEvent.ACTION_DOWN) //action:1
 {

final int listenerCount = mOnItemTouchListeners.size(); //listenerCount=2
//While for previously added items it was 1 only.

for (int i = 0; i < listenerCount; i++) {

final OnItemTouchListener listener = mOnItemTouchListeners.get(i);

if (listener.onInterceptTouchEvent(this, e)) {//e:MotionEvent {action==ACTION_UP
                   mActiveOnItemTouchListener = listener;
                   return true;
                }

但是，如果点击之前添加的项目，那么它的效果非常好。

我只想要一次调用OnClick。但它被称为2次。

我正在将文件夹添加到目录并尝试通过以下方式更新recyclerView的内容：

    public void onFinishEditDialog(String inputText) {
            newAlbumName = inputText;
            initAllVariables();
initRecyclerViewForAlbumView();
        }

重新初始化所有变量和

public void initRecyclerViewForAlbumView() {
        RecyclerView recyclerView;


        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);

        GridLayoutManager gridLayoutManager = new GridLayoutManager(MainActivity.this, 2);

        //recyclerView.addItemDecoration(new GridSpacingItemDecoration(spanCount,spacing,includeEdge));
        recyclerView.setLayoutManager(gridLayoutManager);

        newAlbumAdapter = new NewAlbumAdapter(recyclerView.getContext(),filePathToAllAlbums,allAlbumsName,countOfAlbums,firstImageOfAllFile);
        recyclerView.setAdapter(newAlbumAdapter);

        recyclerView.addOnItemTouchListener(new RecyclerViewTouchListener(this, recyclerView, new RecyclerViewClickListener() {
            @Override
            public void onClick(View view, int position) {
                String[] allImagePathListInAnAlbum;
                Log.e("Item Clicked is", "++++ " + allAlbumsName[position]);
                Log.e("Item Number is", "++++ " + String.valueOf(position));
                allImagePathListInAnAlbum = filePathToAllAlbums[position].list();
                Intent insideAlbumIntent = new Intent(getApplicationContext(), ImagesInsideAlbumMainActivity.class);
                insideAlbumIntent.putExtra("AllImagePath", allImagePathListInAnAlbum);
                startActivity(insideAlbumIntent);

            }

            @Override
            public void onLongClick(View view, int position) {

                Toast.makeText(getApplicationContext(), allAlbumsName[position] + " Is Long clicked\nAt Position: " + String.valueOf(position), Toast.LENGTH_SHORT).show();


            }
        }));

    }

我有两个问题：

1＆GT;有没有其他方法可以更新RecyclerView并在Activity上显示新添加的目录。（我使用了所有通知方法，但它们似乎不起作用）。

2 - ;如果我在OnTouchItemListener中重新初始化RecyclerView，则onFinishEditDialog中的onClick会被调用两次。如果我不这样做，OnClick工作正常，但新创建的目录将不会显示在Activity上。

请帮助解决此问题。如果有人能提供帮助，我将非常感激。

在Android中遇到OnItemTouchListener和RecyclerView更新时遇到问题

0 个答案: