Question

我是xamarin的新手，我尝试通过创建自定义Viewpager来禁用滑动，但我无法在Viewpager中找到触控侦听器界面。有没有办法做到这一点？

public class CustomViewPager : ViewPager   
 {
        Context _context;

        public CustomViewPager(Context context) : base(context)
        {
            _context = context;
        }

        public CustomViewPager(Context context, IAttributeSet arg1) : base(context, arg1)
        {
            _context = context;
        }

        public bool IsPagerDisabled { get; set; }

        /*public override Boolean OnTouchEvent(MotionEvent event)
        {
            if (!IsPagerDisabled)
            {
                return base.OnTouchEvent(event);
            }
            else
            {
                return false;
            }
        }*/
    }

Answer 1

我最近做了一个类似的实现，这看起来像一个魅力：

using Android.Content;
using Android.Support.V4.View;
using Android.Views;

public class LockableViewPager : ViewPager
{
    public bool SwipeLocked { get; set; }

    Context mContext;

    public LockableViewPager(Context context) : base(context)
    {
        Init(context, null);
    }
    public LockableViewPager(Context context, Android.Util.IAttributeSet attrs) : base(context, attrs)
    {
        Init(context, attrs);
    }
    private void Init(Context ctx, Android.Util.IAttributeSet attrs)
    {
        mContext = ctx;
    }

    public override bool OnTouchEvent(MotionEvent ev)
    {
        return !SwipeLocked && base.OnTouchEvent(ev);
    }

    public override bool OnInterceptTouchEvent(MotionEvent e)
    {
        return !SwipeLocked && base.OnInterceptTouchEvent(e);
    }

    public override bool CanScrollHorizontally(int direction)
    {
        return !SwipeLocked && base.CanScrollHorizontally(direction);
    }

}

如何使用它？

在xml中：

<_yourNameSpace.LockableViewPager 
  auto:SwipeLocked="true"

其中auto是

xmlns:auto="http://schemas.android.com/apk/res-auto"

在代码中：

LockableViewPager viewpager= new LoackableViewpager();
Viewpager.SwipeLocked=true;

Answer 2

你必须为此编写课程，如下所示。

public class OnTouchListener : Java.Lang.Object, View.IOnTouchListener
{
    ViewPager pager;

    public OnTouchListener(ViewPager _pager)
    {
        pager = _pager;
    }
    public bool OnTouch(View v, MotionEvent e)
    {
        var view = v as ViewPager;


        pager.SetCurrentItem(0, false);


        return false;
    }
}

然后将此类设置为viewPager。

OnTouchListener onTouchListener = new OnTouchListener(viewPager);
viewPager.SetOnTouchListener(onTouchListener);

Answer 3

我选择将属性命名为“ ScrollEnabled ”。因为iOS仅使用exat相同的命名。因此，您在两个平台上的名称都相同，从而使开发人员更容易。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.Support.V4.View;
using Android.Util;

namespace YourNameSpace.ViewPackage {

    // Need to disable swiping for ViewPager, if user performs Pre DSA and the dsa is not completed yet
    // http://stackoverflow.com/questions/9650265/how-do-disable-paging-by-swiping-with-finger-in-viewpager-but-still-be-able-to-s
    public class CustomViewPager: ViewPager {
        public bool ScrollEnabled;

        public CustomViewPager(Context context, IAttributeSet attrs) : base(context, attrs) {
            this.ScrollEnabled = true;
        }

        public override bool OnTouchEvent(MotionEvent e) {
            if (this.ScrollEnabled) {
                return base.OnTouchEvent(e);
            }
            return false;
        }

        public override bool OnInterceptTouchEvent(MotionEvent e) {
            if (this.ScrollEnabled) {
                return base.OnInterceptTouchEvent(e);
            }
            return false;
        }

        // For ViewPager inside another ViewPager
        public override bool CanScrollHorizontally(int direction) {
            return this.ScrollEnabled && base.CanScrollHorizontally(direction);
        }

        // Some devices like the Galaxy Tab 4 10' show swipe buttons where most devices never show them
        // So, you could still swipe through the ViewPager with your keyboard keys
        public override bool ExecuteKeyEvent(KeyEvent evt) {
            return this.ScrollEnabled ? base.ExecuteKeyEvent(evt) : false;
        }
    }
}

在.axml文件中：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
  <YourNameSpace.ViewPackage.CustomViewPager
      android:id="@+id/pager"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:background="@android:color/white"
      android:layout_alignParentTop="true" />
</LinearLayout>

有没有办法在Xamarin Native android中禁用Android上的Tabbed页面之间的滑动？

3 个答案: