android– 如何在触摸滑动抛出其行时阻止ListView滚动？

概述我需要停止ListView以响应用户手势,如果这些手势是在某个特定的ListView行中进行的–如何做到这一点？目标ListView的行视图具有onTouchListener设置,由于ListView向上/向下滚动,我无法识别滑动/翻转.因此,如果我向上或向下移动手指–ListView会截取并向相应方向滚动.所以我需要

我需要停止ListVIEw以响应用户手势,如果这些手势是在某个特定的ListVIEw行中进行的 – 如何做到这一点？目标ListVIEw的行视图具有ontouchListener设置,由于ListVIEw向上/向下滚动,我无法识别滑动/翻转.因此,如果我向上或向下移动手指 – ListVIEw会截取并向相应方向滚动.所以我需要以某种方式来统治它,如果Y-coord超过一些量 – 让ListVIEw滚动,如果不是 – 将手势识别为fling / swipe. OntouchListener是

private int SWIPE_MIN_disTANCE = 1;private int SWIPE_MAX_OFF_PATH = 300;final OntouchListener flingSwipeListener =  new OntouchListener() {    float touchX;    float touchY;    @OverrIDe    public boolean ontouch(final VIEw vIEw, final MotionEvent event) {        if (event.getAction() == MotionEvent.ACTION_DOWN)        {            touchX = event.getX();            touchY = event.getY();        }        else if (event.getAction() == MotionEvent.ACTION_UP)        {                           if (Math.abs(touchY - event.getY()) > SWIPE_MAX_OFF_PATH)                    return false;            // right to left swipe            else if (touchX - event.getX() > SWIPE_MIN_disTANCE){                    Log.i("flingSwipe","right to left swipe");            }             // left to right swipe            else if (event.getX() - touchX > SWIPE_MIN_disTANCE){                    Log.i("flingSwipe","left to right swipe");            }        }        return true;    }};

此ontouchListner设置为一个特定行.我需要冻结ListVIEw,而ontouchListener识别手势,但如果失败,我需要将MotionEvent发送到ListVIEw.

解决方法:

如果要在检测到任何水平滚动(滑动)时禁用ListVIEw的垂直滚动,请使用以下解决方案 – 覆盖自定义ListVIEw类中的ontouchEvent,并将动作MotionEvent.ACTION_MOVE替换为MotionEvent.ACTION_CANCEL：

public class ListVIEw2 extends ListVIEw{    private enum ScrollDirection    {        Horizontal,        Vertical    }    private final int touchSlop;    private float downX = 0;    private float downY = 0;    private ScrollDirection scrollDirection;    public ListVIEw2(Context context, AttributeSet attrs)    {        super(context, attrs);        touchSlop = VIEwConfiguration.get(context).getScaledtouchSlop();    }    @OverrIDe    public boolean ontouchEvent(MotionEvent ev)    {        switch (ev.getActionMasked())        {            case MotionEvent.ACTION_MOVE:                if (scrollDirection == null)                {                    if (Math.abs(downX - ev.getX()) > touchSlop) scrollDirection = ScrollDirection.Horizontal;                    else if (Math.abs(downY - ev.getY()) > touchSlop) scrollDirection = ScrollDirection.Vertical;                }                if (scrollDirection == ScrollDirection.Horizontal) ev.setAction(MotionEvent.ACTION_CANCEL);                break;            case MotionEvent.ACTION_DOWN:                scrollDirection = null;                downX = ev.getX();                downY = ev.getY();                break;        }        return super.ontouchEvent(ev);    }}

当然,您可以检查逻辑是否禁用垂直滚动更复杂.

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