Question

我的RecyclerView里面有ViewPagers和按钮，所以我无法禁用滚动或禁用所有触摸。

我只禁用垂直滚动：

recyclerView.setLayoutManager(new LinearLayoutManager(this) {
    @Override
    public boolean canScrollVertically() {
        return false;
    }
});

问题是当我尝试使用代码滚动recyclerView时：

recyclerView.smoothScrollBy(0, 500);

android中的smoothScrollBy定义为：

public void smoothScrollBy(int dx, int dy, Interpolator interpolator) {
    if (mLayout == null) {
        Log.e(TAG, "Cannot smooth scroll without a LayoutManager set. "
                + "Call setLayoutManager with a non-null argument.");
        return;
    }
    if (mLayoutFrozen) {
        return;
    }
    if (!mLayout.canScrollHorizontally()) {
        dx = 0;
    }
    if (!mLayout.canScrollVertically()) { // <--- problem
        dy = 0;
    }
    if (dx != 0 || dy != 0) {
        mViewFlinger.smoothScrollBy(dx, dy, interpolator);
    }
}

当我调用scrollBy或smoothScrollBy时没有任何反应，因为canScrollVertically为false。

另请注意，如果我将其设置为true，则滚动，然后尝试false，scrollView抖动并且它不会完全滚动：

layoutManager.canScrollVertically = true;
recyclerView.smoothScrollBy(0, 500);
layoutManager.canScrollVertically = false; // -> when this line is set, the smoothScrolling stops immediately

我试图阻止用户垂直滚动，因为我试图处理代码中的垂直滚动。用户仍然可以与RecyclerView中的其他元素进行交互，并且能够在RecyclerView中水平滚动。

我可以尝试什么？

Answer 1

要创建Horizontal RecyclerView，请使用以下代码：

LinearLayoutManager layoutManager = new 
LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL, false);
recyclerView.setLayoutManager(layoutManager);

Answer 2

您可以使用GestureDetector来实现此目的，请查看下面的代码。方法onScroll()应该返回true，这是其中的重要部分。

public class MainActivity extends AppCompatActivity implements GestureDetector.OnGestureListener {
    GestureDetector gestureDetector;
    RecyclerView recyclerView;
    Random random = (new Random());
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String s[] = {"One","One2","One3","One4","One5","One6","One7","One8","One9","One10","One11","One12","One13","One14","One","One2","One3","One4","One5","One6","One7","One8","One9","One10","One11","One12","One13","One14"};
        recyclerView = (RecyclerView) findViewById(R.id.recycler);
        recyclerView.setAdapter(new MyAdapter(s));
        gestureDetector = new GestureDetector(this, this);
        recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
            @Override
            public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) {

                return gestureDetector.onTouchEvent(e);
//                return false;
            }

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

            }

            @Override
            public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {

            }
        });
    }

    public void scrollClicked(View v) {
        recyclerView.smoothScrollBy(0, 100);
    }

    @Override
    public boolean onDown(MotionEvent motionEvent) {
        return false;
    }

    @Override
    public void onShowPress(MotionEvent motionEvent) {

    }

    @Override
    public boolean onSingleTapUp(MotionEvent motionEvent) {
        return false;
    }

    @Override
    public boolean onScroll(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
        return true;
    }

    @Override
    public void onLongPress(MotionEvent motionEvent) {

    }

    @Override
    public boolean onFling(MotionEvent motionEvent, MotionEvent motionEvent1, float v, float v1) {
        return false;
    }

    public static class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
        private String[] mDataset;

        // Provide a reference to the views for each data item
        // Complex data items may need more than one view per item, and
        // you provide access to all the views for a data item in a view holder
        public static class ViewHolder extends RecyclerView.ViewHolder {
            // each data item is just a string in this case
            public TextView mTextView;
            public ViewHolder(View v) {
                super(v);
                mTextView = (TextView) v;
            }
        }

        // Provide a suitable constructor (depends on the kind of dataset)
        public MyAdapter(String[] myDataset) {
            mDataset = myDataset;
        }

        // Create new views (invoked by the layout manager)
        @Override
        public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
                                                       int viewType) {
            // create a new view
            View v = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.my_text_view, parent, false);
            ViewHolder vh = new ViewHolder(v);
            return vh;
        }

        // Replace the contents of a view (invoked by the layout manager)
        @Override
        public void onBindViewHolder(ViewHolder holder, int position) {
            // - get element from your dataset at this position
            // - replace the contents of the view with that element
            holder.mTextView.setText(mDataset[position]);

        }

        // Return the size of your dataset (invoked by the layout manager)
        @Override
        public int getItemCount() {
            return mDataset.length;
        }
    }
}

以编程方式滚动RecyclerView并禁用垂直滚动

2 个答案: