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android – How do disable paging by swiping with finger in ViewPager but still be able to swipe programmatically?

Posted by: admin March 10, 2020 Leave a comment

Questions:

I have ViewPager and below it I have 10 buttons. By clicking on button, for example #4, the pager goes immediately to page #4 by mPager.setCurrentItem(3);. But, I want to disable the paging by swiping with finger horizontally. Thus, the paging is done ONLY by clicking on the buttons.
So, how I can disable the swiping with finger?

How to&Answers:

You need to subclass ViewPager. onTouchEvent has a lot of good things in it that you don’t want to change like allowing child views to get touches. onInterceptTouchEvent is what you want to change. If you look at the code for ViewPager, you’ll see the comment:

    /*
     * This method JUST determines whether we want to intercept the motion.
     * If we return true, onMotionEvent will be called and we do the actual
     * scrolling there.
     */

Here’s a complete solution:

First, add this class to your src folder:

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.animation.DecelerateInterpolator;
import android.widget.Scroller;
import java.lang.reflect.Field;

public class NonSwipeableViewPager extends ViewPager {

    public NonSwipeableViewPager(Context context) {
        super(context);
        setMyScroller();
    }

    public NonSwipeableViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        setMyScroller();
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        // Never allow swiping to switch between pages
        return false;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // Never allow swiping to switch between pages
        return false;
    }

    //down one is added for smooth scrolling

    private void setMyScroller() {
        try {
            Class<?> viewpager = ViewPager.class;
            Field scroller = viewpager.getDeclaredField("mScroller");
            scroller.setAccessible(true);
            scroller.set(this, new MyScroller(getContext()));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public class MyScroller extends Scroller {
        public MyScroller(Context context) {
            super(context, new DecelerateInterpolator());
        }

        @Override
        public void startScroll(int startX, int startY, int dx, int dy, int duration) {
            super.startScroll(startX, startY, dx, dy, 350 /*1 secs*/);
        }
    }
}

Next, make sure to use this class instead of the regular ViewPager, which you probably specified as android.support.v4.view.ViewPager. In your layout file, you’ll want to specify it with something like:

<com.yourcompany.NonSwipeableViewPager
    android:id="@+id/view_pager"
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1" />

This particular example is in a LinearLayout and is meant to take up the entire screen, which is why layout_weight is 1 and layout_height is 0dp.

And setMyScroller(); method is for smooth transition

Answer:

The more general extension of ViewPager would be to create a SetPagingEnabled method so that we can enable and disable paging on the fly.
To enable / disable the swiping, just overide two methods: onTouchEvent and onInterceptTouchEvent. Both will return “false” if the paging was disabled.

public class CustomViewPager extends ViewPager {

    private boolean enabled;

    public CustomViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.enabled = true;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (this.enabled) {
            return super.onTouchEvent(event);
        }

        return false;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        if (this.enabled) {
            return super.onInterceptTouchEvent(event);
        }

        return false;
    }

    public void setPagingEnabled(boolean enabled) {
        this.enabled = enabled;
    } 
}

Then select this instead of the built-in viewpager in XML

<mypackage.CustomViewPager 
    android:id="@+id/myViewPager" 
    android:layout_height="match_parent" 
    android:layout_width="match_parent" />

You just need to call the setPagingEnabled method with false and users won’t be able to swipe to paginate.

Answer:

The simplest way is to setOnTouchListener and return true for ViewPager.

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

Answer:

Better to declare it styleable, so you can change its property from xml:

private boolean swipeable;

public MyViewPager(Context context, AttributeSet attrs) {
    super(context, attrs);
    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MyViewPager);
    try {
        swipeable = a.getBoolean(R.styleable.MyViewPager_swipeable, true);
    } finally {
        a.recycle();
    }
}

@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
    return swipeable ? super.onInterceptTouchEvent(event) : false;
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    return swipeable ? super.onTouchEvent(event) : false;
}

And in your values/attr.xml:

<declare-styleable name="MyViewPager">
  <attr name="swipeable" format="boolean" />
</declare-styleable>

so that you can use it in you layout xml:

<mypackage.MyViewPager
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/viewPager"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    app:swipeable="false" />

Of course, you can still have a get/set property.

Answer:

Overriding only onTouchEvent and onInterceptTouchEvent is not sufficient in case you have ViewPager itself inside another ViewPager. Child ViewPager would steal horizontal scroll touch events from parent ViewPager unless it is positioned on its first / last page.

To make this setup work properly you need to override also the canScrollHorizontally method.

See LockableViewPager implementation below.

public class LockableViewPager extends ViewPager {

    private boolean swipeLocked;

    public LockableViewPager(Context context) {
        super(context);
    }

    public LockableViewPager(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);
    }

}

Answer:

If you are extending from ViewPager, you must also override executeKeyEvent as indicated previously by @araks

@Override
public boolean executeKeyEvent(KeyEvent event)
{
    return isPagingEnabled ? super.executeKeyEvent(event) : false;
}

Because some devices like the Galaxy Tab 4 10′ show these buttons where most devices never show them:

Keyboard buttons

Answer:

Now we no need to create custom ViewPager

A new ViewPager2 name View available in android

Vertical orientation support

  • ViewPager2 supports vertical paging in addition to traditional horizontal paging. You can enable vertical paging for a ViewPager2 element by setting its android:orientation attribute

Using XML

<androidx.viewpager2.widget.ViewPager2
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:orientation="vertical" />

Using code

To disable swiping in viewpager2 use

viewPager2.setUserInputEnabled(false);

To enable swiping in viewpager2 Use

viewPager2.setUserInputEnabled(true);

for more information check this

UPDATE

Answer:

To disable swipe

mViewPager.beginFakeDrag();

To enable swipe

mViewPager.endFakeDrag();

Answer:

I needed to disable swiping on one specific page, and give it a nice rubber-band animation, here’s how:

    mViewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {

        @Override
        public void onPageScrolled(int position, float positionOffset,
                                   int positionOffsetPixels) {
            if (position == MANDATORY_PAGE_LOCATION && positionOffset > 0.5) {
                mViewPager.setCurrentItem(MANDATORY_PAGE_LOCATION, true);
            }
        }

Answer:

I wrote a CustomViewPager with a swiping control:

public class ScrollableViewPager extends ViewPager {
    private boolean canScroll = true;
    public ScrollableViewPager(Context context) {
        super(context);
    }
    public ScrollableViewPager(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
    public void setCanScroll(boolean canScroll) {
        this.canScroll = canScroll;
    }
    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        return canScroll && super.onTouchEvent(ev);
    }
    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        return canScroll && super.onInterceptTouchEvent(ev);
    }
}

If you set canScroll to true, this ViewPager can be swiping with finger, false on the contrary.

I use this in my project, and it works great until now.

Answer:

I know it’s mighty late to post this but here’s a tiny hack to achieve your outcome 😉

Simply add a dummy view below your viewpager:

<android.support.v4.view.ViewPager
     android:layout_width="match_parent"
     android:layout_height="match_parent">
</android.support.v4.view.ViewPager>

<RelativeLayout
     android:id="@+id/dummyView"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
</RelativeLayout>

Then add a OnClickListener to your RelativeLayout.

dummyView = (RelativeLayout) findViewById(R.id.dummyView);

dummyView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
         //Just leave this empty
    }
});

Get a bit creative with layouts, their placements and their behaviour and you’ll learn to find a way to do absolutely anything that you imagine 🙂

Good luck!

Answer:

I used this class with success. Overriding the executeKeyEvent is required to avoid swiping using arrows in some devices or for accessibility:

import android.content.Context;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;

public class ViewPagerNoSwipe extends ViewPager {
    /**
     * Is swipe enabled
     */
    private boolean enabled;

    public ViewPagerNoSwipe(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.enabled = false; // By default swiping is disabled
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return this.enabled ? super.onTouchEvent(event) : false;
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        return this.enabled ? super.onInterceptTouchEvent(event) : false;
    }

    @Override
    public boolean executeKeyEvent(KeyEvent event) {
        return this.enabled ? super.executeKeyEvent(event) : false;
    }

    public void setSwipeEnabled(boolean enabled) {
        this.enabled = enabled;
    }

}

And in the xml call it like this:

<package.path.ViewPagerNoSwipe
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

Answer:

In Kotlin, my solution, combining above answers.

class CustomViewPager(context: Context, attrs: AttributeSet): ViewPager(context, attrs) {
    var swipeEnabled = false

    override fun onTouchEvent(ev: MotionEvent?): Boolean {
        return if (swipeEnabled) super.onTouchEvent(ev) else false
    }

    override fun onInterceptTouchEvent(ev: MotionEvent?): Boolean {
        return if (swipeEnabled) super.onInterceptTouchEvent(ev) else false
    }

    override fun executeKeyEvent(event: KeyEvent): Boolean {
        return if (swipeEnabled) super.executeKeyEvent(event) else false
    }
}

Answer:

In kotlin, we can solve this by creating a custom widget inheriting the ViewPager class and adding a flag value for controlling swipe behavior.

NoSwipePager.kt

class NoSwipePager(context: Context, attrs: AttributeSet) : ViewPager(context, attrs) {

    var pagingEnabled: Boolean = false

    override fun onTouchEvent(event: MotionEvent): Boolean {
        return if (this.pagingEnabled) {
            super.onTouchEvent(event)
        } else false
    }

    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
        return if (this.pagingEnabled) {
            super.onInterceptTouchEvent(event)
        } else false
    }
}

In xml

<your.package.NoSwipePager
    android:id="@+id/view_pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_below="@id/tab_layout" />

Disable swiping programmatically. If kotlin-android-extensions plugin is applied in build.gradle, swiping can be disabled by writing below code.

view_pager.pagingEnabled = false

Otherwise we can disable swiping using code below:

val viewPager : ViewPager = findViewById(R.id.view_pager)
viewPager.pagingEnabled = false

Answer:

Try overriding and returning true from either onInterceptTouchEvent() and/or onTouchEvent(), which will consume touch events on the pager.

Answer:

Another easy solution to disable swiping at specific page (in this example, page 2):

int PAGE = 2;
viewPager.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {
        if (viewPager.getCurrentItem() == PAGE) {
                viewPager.setCurrentItem(PAGE-1, false);
                viewPager.setCurrentItem(PAGE, false);
                return  true;
        }
        return false;
}

Answer:

If you write an image gallery with ImageViews and ViewPager, that supports zoom and pan, see a simple solution described here: Implementing a zoomable ImageView by Extending the Default ViewPager in Phimpme Android (and Github sample – PhotoView). This solution doesn’t work with ViewPager alone.

public class CustomViewPager extends ViewPager {
    public CustomViewPager(Context context) {
        super(context);
    }

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

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        try {
            return super.onInterceptTouchEvent(event);
        } catch (IllegalArgumentException e) {
            return false;
        }
    }
}

Answer:

If you want to implement the same for Android in Xamarin, here is a translation to C#

I chose to name the attribute “ScrollEnabled“. Because iOS just uses the excat same naming. So, you have equal naming across both platforms, makes it easier for developers.

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;
        }
    }
}

In .axml file:

<?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>

Answer:

This worked for me

viewPager.setOnTouchListener(new View.OnTouchListener() {
                                         @Override
                                         public boolean onTouch(View v, MotionEvent event) {
                                             if (viewPager.getCurrentItem() == 0) {
                                                 viewPager.setCurrentItem(-1, false);
                                                 return true;
                                             }
                                             else if (viewPager.getCurrentItem() == 1) {
                                                 viewPager.setCurrentItem(1, false);
                                                 return true;
                                             }
                                             else if (viewPager.getCurrentItem() == 2) {
                                                 viewPager.setCurrentItem(2, false);
                                                 return true;
                                             }
                                             return true;
                                         }
                                     });

Answer:

None of the above code is working smoothly.i tried this

<HorizontalScrollView
                    android:id="@+id/horizontalScrollView"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:fillViewport="true">

                    <android.support.v4.view.ViewPager
                        android:id="@+id/pager"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent" />
                </HorizontalScrollView>

Answer:

here is my implementation
that if you want to disable the swipe animation you can you use the swipeListener left and right and still want the scroll by finger but without animation

1-Override Viewpager method onInterceptTouchEvent and onTouchEvent

2- create your own GestureDetector

3- detect the swipe gesture and use the 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();
    }
}

the when you are set up the ViewPager set the 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);

            }
             ...
           }

Answer:

I just customized the viewpager a little and disable swiping easily.

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);
}
}

Answer:

shareViewPager?.setOnTouchListener(object :View.OnTouchListener{
            override fun onTouch(v: View?, event: MotionEvent?): Boolean {
                for (PAGE in 0..shareViewPager.adapter!!.count){
                    if (shareViewPager.currentItem==PAGE){
                        shareViewPager.setCurrentItem(PAGE-1,false)
                        shareViewPager.setCurrentItem(PAGE,false)
                    }}
                return true
            }

        })