我有一个列表视图，根据某些逻辑，我想暂时禁用滚动。 view.setOnScrollListener（NULL）;不能帮助我我想我需要编写一些代码，有人可以给我一个文件或一些片段吗？
由于
答案 0 :(得分：43)
如果动作事件操作为onTouchListener，则不创建新自定义ListView的另一个选项是将onTouch()附加到ListView并在ACTION_MOVE回调中返回true。
listView.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
return (event.getAction() == MotionEvent.ACTION_MOVE);
}
});
答案 1 :(得分：41)
在CustomListView中：
@Override
public boolean dispatchTouchEvent(MotionEvent ev){
if(ev.getAction()==MotionEvent.ACTION_MOVE)
return true;
return super.dispatchTouchEvent(ev);
}
然后ListView会对点击作出反应，但不会改变滚动位置。
答案 2 :(得分：27)
使用 listview.setEnabled（false）禁用列表视图滚动
注意：这也会禁用行选择
答案 3 :(得分：8)
如果您有一个绑定到列表项的事件，则使用这些解决方案中的任何一个拖动列表仍将触发该事件。您希望使用以下方法来考虑用户期望通过拖离所选项目来取消事件（改编自Pointer Null＆＃39;答案）：
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
final int actionMasked = ev.getActionMasked() & MotionEvent.ACTION_MASK;
if (actionMasked == MotionEvent.ACTION_DOWN) {
// Record the position the list the touch landed on
mPosition = pointToPosition((int) ev.getX(), (int) ev.getY());
return super.dispatchTouchEvent(ev);
}
if (actionMasked == MotionEvent.ACTION_MOVE) {
// Ignore move events
return true;
}
if (actionMasked == MotionEvent.ACTION_UP) {
// Check if we are still within the same view
if (pointToPosition((int) ev.getX(), (int) ev.getY()) == mPosition) {
super.dispatchTouchEvent(ev);
} else {
// Clear pressed state, cancel the action
setPressed(false);
invalidate();
return true;
}
}
return super.dispatchTouchEvent(ev);
}
可以使用完整的自定义视图类：https://gist.github.com/danosipov/6498490
答案 4 :(得分：7)
制作CustomListView
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
if(needToStop){
return false;}
return super.onInterceptTouchEvent(ev);
}
在false上，孩子们会处理触摸事件，请确保将if condition检查是否需要滚动。
答案 5 :(得分：5)
对我来说最好的答案是丹·奥西波夫的一个人。 我会像这样改进它。 （触发CANCEL动作事件而不是手动擦除按下状态）。
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
final int actionMasked = ev.getActionMasked() & MotionEvent.ACTION_MASK;
if (actionMasked == MotionEvent.ACTION_DOWN) {
// Record the position the list the touch landed on
mPosition = pointToPosition((int) ev.getX(), (int) ev.getY());
return super.dispatchTouchEvent(ev);
}
if (actionMasked == MotionEvent.ACTION_MOVE) {
// Ignore move events
return true;
}
if (actionMasked == MotionEvent.ACTION_UP) {
// Check if we are still within the same view
if (pointToPosition((int) ev.getX(), (int) ev.getY()) != mPosition) {
// Clear pressed state, cancel the action
ev.setAction(MotionEvent.ACTION_CANCEL);
}
}
return super.dispatchTouchEvent(ev);
}
答案 6 :(得分：2)
在列表视图中编写用于滑动删除的代码时，我想在检测到滑动后阻止垂直滚动。一旦满足滑动删除条件，我在ACTION_MOVE部分设置了一个布尔标志。 dispatchTouchEvent方法检查该条件并阻止滚动工作。在ACTION_UP中，我将标志设置为false以重新启用滚动。
private float mY = Float.NaN;
private boolean mStopScroll = false;
@Override
public boolean onTouch(View view, MotionEvent event) {
if(!mStopScroll) {
mY = event.getY();
}
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE:
if(<condition that stops the vertical scroll>) {
mStopScroll = true;
}
break;
case MotionEvent.ACTION_UP:
mStopScroll = false;
// your code here
return true;
default:
}
return false;
}
@Override
public boolean dispatchTouchEvent(MotionEvent motionEvent) {
if(mStopScroll) {
motionEvent.setLocation(motionEvent.getX(), mY);
}
return super.dispatchTouchEvent(motionEvent);
}
答案 7 :(得分：1)
对于Xamarin和MvvmCross用户，我的回答会很有趣。主要概念与之前的帖子相同，因此主要步骤是：
这里你是帮助类，允许在列表视图中禁用滚动：
using System;
using Cirrious.MvvmCross.Binding.Droid.Views;
using Android.Content;
using Android.Util;
using Android.Views;
using Android.Database;
namespace MyProject.Android.Helpers
{
public class UnscrollableMvxListView
: MvxListView
{
private MyObserver _myObserver;
public UnscrollableMvxListView (Context context, IAttributeSet attrs, MvxAdapter adapter)
: base(context, attrs, adapter)
{
}
protected override void OnAttachedToWindow ()
{
base.OnAttachedToWindow ();
var dtso = new MyObserver(this);
_myObserver = dtso;
Adapter.RegisterDataSetObserver (dtso);
}
protected override void OnDetachedFromWindow ()
{
Log.Debug ("UnscrollableMvxListView", "OnDetachedFromWindow");
if (_myObserver != null) {
Adapter.UnregisterDataSetObserver (_myObserver);
_myObserver = null;
}
base.OnDetachedFromWindow ();
}
//Make List Unscrollable
private int _position;
public override bool DispatchTouchEvent (MotionEvent ev)
{
MotionEventActions actionMasked = ev.ActionMasked & MotionEventActions.Mask;
if (actionMasked == MotionEventActions.Down) {
// Record the position the list the touch landed on
_position = PointToPosition((int) ev.GetX (), (int) ev.GetY());
return base.DispatchTouchEvent(ev);
}
if (actionMasked == MotionEventActions.Move) {
// Ignore move events
return true;
}
if (actionMasked == MotionEventActions.Up) {
// Check if we are still within the same view
if (PointToPosition((int) ev.GetX(), (int) ev.GetY()) == _position) {
base.DispatchTouchEvent(ev);
} else {
// Clear pressed state, cancel the action
Pressed = false;
Invalidate();
return true;
}
}
return base.DispatchTouchEvent(ev);
}
//Make List Flat
public void JustifyListViewHeightBasedOnChildren () {
if (Adapter == null) {
return;
}
var vg = this as ViewGroup;
int totalHeight = 0;
for (int i = 0; i < Adapter.Count; i++) {
View listItem = Adapter.GetView(i, null, vg);
listItem.Measure(0, 0);
totalHeight += listItem.MeasuredHeight;
}
ViewGroup.LayoutParams par = LayoutParameters;
par.Height = totalHeight + (DividerHeight * (Adapter.Count - 1));
LayoutParameters = par;
RequestLayout();
}
}
internal class MyObserver
: DataSetObserver
{
private readonly UnscrollableMvxListView _unscrollableMvxListView;
public MyObserver (UnscrollableMvxListView lst)
{
_unscrollableMvxListView = lst;
}
public override void OnChanged() {
Log.Debug("UnscrollableMvxListView", "OnChanged");
base.OnChanged ();
_unscrollableMvxListView.JustifyListViewHeightBasedOnChildren ();
}
}
}
答案 8 :(得分：1)
这是代码Joe Blow（评论OP帖子）指向http://danosipov.com/?p=604但是我在这里发布它以保护它以防链接被孤立：
public class ScrollDisabledListView extends ListView {
private int mPosition;
public ScrollDisabledListView(Context context) {
super(context);
}
public ScrollDisabledListView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ScrollDisabledListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
final int actionMasked = ev.getActionMasked() & MotionEvent.ACTION_MASK;
if (actionMasked == MotionEvent.ACTION_DOWN) {
// Record the position the list the touch landed on
mPosition = pointToPosition((int) ev.getX(), (int) ev.getY());
return super.dispatchTouchEvent(ev);
}
if (actionMasked == MotionEvent.ACTION_MOVE) {
// Ignore move events
return true;
}
if (actionMasked == MotionEvent.ACTION_UP) {
// Check if we are still within the same view
if (pointToPosition((int) ev.getX(), (int) ev.getY()) == mPosition) {
super.dispatchTouchEvent(ev);
} else {
// Clear pressed state, cancel the action
setPressed(false);
invalidate();
return true;
}
}
return super.dispatchTouchEvent(ev);
}
}
将此ListView添加到布局时，请记住在其前面加上其包名称，否则在尝试对其进行充气时会抛出异常。
答案 9 :(得分：1)
试试这个：
listViewObject.setTranscriptMode(0);
适合我。