我有ViewPager,在它下面有10个按钮。通过单击按钮,例如#4,寻呼机立即通过mPager.setCurrentItem(3)转到第#4页。但是,我想通过水平滑动手指禁用分页。因此,分页只能通过单击按钮来完成。 那么,我如何禁用手指滑动?
当前回答
我只是自定义了viewpager一点和禁用滑动容易。
public class CustomViewPager extends ViewPager {
private boolean swipeLocked;
public CustomViewPager(Context context) {
super(context);
}
public CustomViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
public boolean getSwipeLocked() {
return swipeLocked;
}
public void setSwipeLocked(boolean swipeLocked) {
this.swipeLocked = swipeLocked;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return !swipeLocked && super.onTouchEvent(event);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
return !swipeLocked && super.onInterceptTouchEvent(event);
}
@Override
public boolean canScrollHorizontally(int direction) {
return !swipeLocked && super.canScrollHorizontally(direction);
}
}
其他回答
现在我们不需要创建自定义ViewPager
android中有一个新的ViewPager2名称View
垂直方向支撑
除了传统的水平分页之外,ViewPager2还支持垂直分页。你可以通过设置ViewPager2元素的android:orientation属性来启用垂直分页
使用XML
<androidx.viewpager2.widget.ViewPager2
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:orientation="vertical" />
使用代码
在viewpager2中禁用滑动
viewPager2.setUserInputEnabled(false);
在viewpager2使用中启用滑动
viewPager2.setUserInputEnabled(true);
要了解更多信息,请查看这个
ViewPager2 ViewPager2的外壳 手与ViewPager2
更新
请检查:从ViewPager迁移到ViewPager2 完整的例子,请检查这使用的ViewPager2在Android
最简单的方法是setOnTouchListener并为ViewPager返回true。
mPager.setOnTouchListener(new OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
return true;
}
});
这是我的实现 如果你想禁用滑动动画,你可以左右使用swipeListener,仍然希望通过手指滚动,但没有动画
1-覆盖Viewpager方法onInterceptTouchEvent和onTouchEvent
2-创建自己的手势检测器
3-检测滑动手势并使用setCurrentItem(item, false)
ViewPager
public class ViewPagerNoSwipe extends ViewPager {
private final GestureDetector gestureDetector;
private OnSwipeListener mOnSwipeListener;
public void setOnSwipeListener(OnSwipeListener onSwipeListener) {
mOnSwipeListener = onSwipeListener;
}
public ViewPagerNoSwipe(@NonNull Context context) {
super(context);
gestureDetector = new GestureDetector(context, new GestureListener());
}
public ViewPagerNoSwipe(@NonNull Context context, @Nullable AttributeSet attrs) {
super(context, attrs);
gestureDetector = new GestureDetector(context, new GestureListener());
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
return true;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
gestureDetector.onTouchEvent(ev);
return false;
}
public class GestureListener extends GestureDetector.SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
if(mOnSwipeListener!=null)
mOnSwipeListener.onSwipeRight();
} else {
if(mOnSwipeListener!=null)
mOnSwipeListener.onSwipeLeft();
}
result = true;
}
} else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
if(mOnSwipeListener!=null)
mOnSwipeListener.onSwipeBottom();
} else {
if(mOnSwipeListener!=null)
mOnSwipeListener.onSwipeTop();
}
result = true;
}
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public interface OnSwipeListener {
void onSwipeRight();
void onSwipeLeft();
void onSwipeTop();
void onSwipeBottom();
}
}
当你设置ViewPager时,设置swipeListener
postsPager.setOnSwipeListener(new ViewPagerNoSwipe.OnSwipeListener() {
@Override
public void onSwipeRight() {
postsPager.setCurrentItem(postsPager.getCurrentItem() + 1,false);
}
@Override
public void onSwipeLeft() {
postsPager.setCurrentItem(postsPager.getCurrentItem() - 1, false);
}
...
}
我只是自定义了viewpager一点和禁用滑动容易。
public class CustomViewPager extends ViewPager {
private boolean swipeLocked;
public CustomViewPager(Context context) {
super(context);
}
public CustomViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
public boolean getSwipeLocked() {
return swipeLocked;
}
public void setSwipeLocked(boolean swipeLocked) {
this.swipeLocked = swipeLocked;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
return !swipeLocked && super.onTouchEvent(event);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
return !swipeLocked && super.onInterceptTouchEvent(event);
}
@Override
public boolean canScrollHorizontally(int direction) {
return !swipeLocked && super.canScrollHorizontally(direction);
}
}
如果你想在Xamarin中为Android实现同样的功能,这里有一个c#的翻译
我选择将属性命名为“ScrollEnabled”。因为iOS使用的是完全相同的命名。因此,在两个平台上都有相同的命名,这使开发人员更容易。
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:
<?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>
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