Question

我正在尝试实现水平recyclerview，recyclerview的每个项目都是带有网格布局的垂直recyclerview。我面临的问题是，当我尝试垂直滚动子recyclerview时，父recyclerview采用滚动并开始水平滚动。我尝试解决这个问题的方法是，

setNestedScrollingEnabled(false)

recyclerview
在孩子的onTouch() recyclerview我通过调用recyclerview

requestdisallowinterceptTouchevent(false)

上述解决方案均未提供问题的完美解决方案。任何帮助表示赞赏

Answer 1

这个问题对我很有意思。所以我试图实现，这就是我所取得的成果（你也可以看到video here），这非常流畅。

所以你可以尝试这样的事情：

像这样定义CustomLinearLayoutManager延长LinearLayoutManager：

public class CustomLinearLayoutManager extends LinearLayoutManager {

    public CustomLinearLayoutManager(Context context, int orientation, boolean reverseLayout) {
        super(context, orientation, reverseLayout);
    }

    @Override
    public boolean canScrollVertically() {
        return false;
    }
}

并将此CustomLinearLayoutManager设置为您的父RecyclerView。

RecyclerView parentRecyclerView = (RecyclerView)findViewById(R.id.parent_rv);
CustomLinearLayoutManager customLayoutManager = new CustomLinearLayoutManager(this, LinearLayoutManager.HORIZONTAL,false);
parentRecyclerView.setLayoutManager(customLayoutManager);
parentRecyclerView.setAdapter(new ParentAdapter(this)); // some adapter

现在，对于子RecyclerView，定义自定义CustomGridLayoutManager GridLayoutManager {/ p>}

public class CustomGridLayoutManager extends GridLayoutManager {

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

    public CustomGridLayoutManager(Context context, int spanCount) {
        super(context, spanCount);
    }

    public CustomGridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout) {
        super(context, spanCount, orientation, reverseLayout);
    }

    @Override
    public boolean canScrollHorizontally() {
        return false;
    }
}

并将其设置为layoutManger给孩子RecyclerView：

childRecyclerView = (RecyclerView)itemView.findViewById(R.id.child_rv);
childRecyclerView.setLayoutManager(new CustomGridLayoutManager(context, 3));
childRecyclerView.setAdapter(new ChildAdapter()); // some adapter

所以基本上，父RecyclerView只是在听水平卷轴，而小RecyclerView只是在听垂直卷轴。

除此之外，如果您还想处理对角线滑动（几乎不会倾斜到垂直或水平），您可以在父级 RecylerView中包含手势监听器。 / p>

public class ParentRecyclerView extends RecyclerView {

    private GestureDetector mGestureDetector;

    public ParentRecyclerView(Context context) {
        super(context);
        mGestureDetector = new GestureDetector(this.getContext(), new XScrollDetector());
       // do the same in other constructors
    }

   // and override onInterceptTouchEvent

   @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        return super.onInterceptTouchEvent(ev) && mGestureDetector.onTouchEvent(ev);
    }

}

XScrollDetector

的位置

class XScrollDetector extends GestureDetector.SimpleOnGestureListener {
        @Override
        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            return Math.abs(distanceY) < Math.abs(distanceX);
        }
}

因此ParentRecyclerView要求子视图（在我们的例子中，VerticalRecyclerView）来处理scroll事件。如果子视图处理，则父进程不执行任何操作，父进程最终处理滚动。

Answer 2

父回收者视图
上的
setNestedScrollingEnabled（false）

您可以尝试在子 RecyclerView上setNestedScrollingEnabled(false)，如果有的话。 RecyclerView的nestedscroll-ness是一个孩子的（这就是它实现NestedScrollingChild的原因）。

在child recyclerview的onTouch（）中，我禁用了触摸事件通过调用父回收者视图 requestdisallowinterceptTouchevent（假）

这应该有效，但您应该做的是requestDisallowInterceptTouchEvent(true)，而不是false。如果您继承RecyclerView，则可以覆盖onTouchEvent：

@Override
public boolean onTouchEvent(MotionEvent event) {
    if (MotionEventCompat.getActionMasked(event) == MotionEvent.ACTION_UP) {
        // ensure we release the disallow request when the finger is lifted
        getParent().requestDisallowInterceptTouchEvent(false);
    } else {
        getParent().requestDisallowInterceptTouchEvent(true);
    }
    // Call the super class to ensure touch handling
    return super.onTouchEvent(event);
}

或者，从外面有一个触控听众，

child.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (v.getId() == child.getId()) {
            if (MotionEventCompat.getActionMasked(event) == MotionEvent.ACTION_UP) {
                // ensure we release the disallow request when the finger is lifted
                child.getParent().requestDisallowInterceptTouchEvent(false);
            } else {
                child.getParent().requestDisallowInterceptTouchEvent(true);
            }
        }
        // Call the super class to ensure touch handling
        return super.onTouchEvent(event);
    }
});

Answer 3

我通过对你（以及其他所有人）采取相反的方法，在类似的项目中解决了这个问题。

我不让孩子告诉父母何时停止查看事件，而是让父母决定何时忽略（基于方向）。这种方法需要一个自定义视图，虽然可以多做一点工作。下面是我创建的将用作外部/父视图的内容。

public class DirectionalRecyclerView extends RecyclerView {

    private static float LOCK_DIRECTION_THRESHOLD; //The slop
    private float startX;
    private float startY;
    private LockDirection mLockDirection = null;

    public DirectionalRecyclerView(Context context) {
        super(context);
        findThreshold(context);
    }

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

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

    private void findThreshold(Context context) {
        //last number is number of dp to move before deciding that's a direction not a tap, you might want to tweak it
        LOCK_DIRECTION_THRESHOLD = context.getResources().getDisplayMetrics().density * 12;
    }

    //events start at the top of the tree and then pass down to
    //each child view until they reach where they were initiated
    //unless the parent (this) method returns true for this visitor
    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                startX = event.getX();
                startY = event.getY();
                break;
            case MotionEvent.ACTION_MOVE:
                if (mLockDirection == null) {
                    float currentX = event.getX();
                    float currentY = event.getY();
                    float diffX = Math.abs(currentX - startX);
                    float diffY = Math.abs(currentY - startY);
                    if (diffX > LOCK_DIRECTION_THRESHOLD) {
                        mLockDirection = LockDirection.HORIZONTAL;
                    } else if (diffY > LOCK_DIRECTION_THRESHOLD) {
                        mLockDirection = LockDirection.VERTICAL;
                    }
                } else {
                    //we have locked a direction, check whether we intercept
                    //the future touches in this event chain
                    //(returning true steals children's events, otherwise we'll
                    // just let the event trickle down to the child as usual)
                    return mLockDirection == LockDirection.HORIZONTAL;
                }
                break;
            case MotionEvent.ACTION_UP:
                mLockDirection = null;
                break;
        }
        //dispatch cancel, clicks etc. normally
        return super.onInterceptTouchEvent(event);
    }

    private enum LockDirection {
        HORIZONTAL,
        VERTICAL
    }

}

Answer 4

将侦听器设置为嵌套的RecyclerView

 View.OnTouchListener listener = new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    if (event.getAction() == MotionEvent.ACTION_MOVE
                            ) {
                        v.getParent().requestDisallowInterceptTouchEvent(true);

                    } else {
                        v.getParent().requestDisallowInterceptTouchEvent(false);

                    }
                    return false;
                }
            };

            mRecyclerView.setOnTouchListener(listener);

Answer 5

现在您可以尝试android:nestedScrollingEnabled，因为Google使用nestedScrollingEnabled (Issue 197932)

的用法修复了崩溃

Answer 6

试试这个。对于我的用例，它起作用了：

nestedRecyclerView.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        return true;
    }
});

Answer 7

尝试下面的代码，希望它能运作。

nestedRecyclerView.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    int action = event.getAction();
                   switch (action) {
                  case MotionEvent.ACTION_DOWN:
                     // Disallow parent to intercept touch events.
                     v.getParent().requestDisallowInterceptTouchEvent(true);
                     break;

                 case MotionEvent.ACTION_UP:
                    // Allow parent to intercept touch events.
                    v.getParent().requestDisallowInterceptTouchEvent(false);
            break;
        }

                  // Handle inner(child) touch events.
                    v.onTouchEvent(event);
        return true;
                }
            });

Answer 8

尝试以下代码滚动内部RecyclerView。

innerRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {

        @Override
        public void onTouchEvent(RecyclerView recycler, MotionEvent event) {
            // Handle on touch events here
            int action = event.getAction();
            switch (action) {
                case MotionEvent.ACTION_DOWN:
                    // Disallow Parent RecyclerView to intercept touch events.
                    recycler.getParent().requestDisallowInterceptTouchEvent(true);
                    break;

                case MotionEvent.ACTION_UP:
                    // Allow Parent RecyclerView to intercept touch events.
                    recycler.getParent().requestDisallowInterceptTouchEvent(false);
                    break;
            }


        }

        @Override
        public boolean onInterceptTouchEvent(RecyclerView recycler, MotionEvent event) {
            return false;
        }

    });

Answer 9

IMO，您可以在外部RecyclerView的适配器中尝试以下内容：

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview, parent, false);

        RVAdapter2 recyclerViewAdapter2 = new RVAdapter2();
        RecyclerView innerRV = (RecyclerView) v.findViewById(R.id.rv2);
        // Setup layout manager for items
        LinearLayoutManager layoutManager2 = new LinearLayoutManager(parent.getContext());
        // Control orientation of the items
        layoutManager2.setOrientation(LinearLayoutManager.VERTICAL);
        innerRV.setLayoutManager(layoutManager2);
        innerRV.setAdapter(recyclerViewAdapter2);

        innerRV.setOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                recyclerView.getParent().requestDisallowInterceptTouchEvent(true);
            }
        });

        return new MyViewHolder(v);
    }

对于API23，您还可以尝试innerRV.setOnScrollChangeListener，因为setOnScrollListener已被弃用。

UPDATE：

另一种选择是使用addOnScrollListener而不是setOnScrollListener

希望它有所帮助！

Answer 10

你应该这样做：

innerRecyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {

        @Override
        public void onTouchEvent(RecyclerView recycler, MotionEvent event) {
            // Handle on touch events here
            int action = event.getAction();
            switch (action) {
                case MotionEvent.ACTION_DOWN:

                    recycler.getParent().requestDisallowInterceptTouchEvent(true);

                    break;

                case MotionEvent.ACTION_UP:

                    recycler.getParent().requestDisallowInterceptTouchEvent(false);

                    break;

                case MotionEvent.ACTION_MOVE:

                    recycler.getParent().requestDisallowInterceptTouchEvent(true);

                    break;
            }


        }

        @Override
        public boolean onInterceptTouchEvent(RecyclerView recycler, MotionEvent event) {
            return false;
        }

    });

希望这会对你有所帮助。

Answer 11

使用此代码关闭recyclerview上的滚动：

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

Answer 12

Android为RecyclerView实现onInterceptTouchEvent（）方法存在问题。这个博客提出了问题并修复了它 - http://nerds.headout.com/fix-horizontal-scrolling-in-your-android-app/。唯一的区别是父母垂直滚动和儿童水平滚动。但是解决方案也要注意它应该适合你的情况。

Answer 13

我在单元格中使用了卡视图，并在带有子单元itemView setOnClickListener的子适配器中停用了父回收器视图滚动。

holder.itemView.setOnTouchListener { view, _ ->
    view.parent.parent.requestDisallowInterceptTouchEvent(true)
    false
}

我们之所以打电话给view.parent.parent是因为itemView是一个单元格布局，其父级是我们的子级recyclerView，此外，我们还需要联系recyclerView子级的父级来防止父级{ {1}}滚动。

Answer 14

像这样扩展自定义布局管理器

 public class CustomLayoutManager extends LinearLayoutManager {
 private boolean isScrollEnabled = true;

 public CustomGridLayoutManager(Context context) {
 super(context);
        }
  @Override
 public boolean canScrollVertically() {
 return false;
 }
}

将布局管理器设置为此“自定义布局管理器”

嵌套的RecyclerView。如何在子级RecyclerView滚动时阻止父级RecyclerView滚动？

14 个答案:

UPDATE：