Is it possible to disable scrolling on a ViewPager

Question

I have a ViewPager which instantiates a View. I'd like to disable both the scrolling of the viewpager and the child buttons momentarily while a search result is returned to the view. I've calling viewPager.setEnabled(false) but this doesn't disable it.

Anyone got any ideas?

Answer 1

A simple solution is to create your own subclass of ViewPager that has a private boolean flag, isPagingEnabled. Then override the onTouchEvent and onInterceptTouchEvent methods. If isPagingEnabled equals true invoke the super method, otherwise return.

public class CustomViewPager extends ViewPager {

    private boolean isPagingEnabled = true;

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

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

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

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

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

Then in your Layout.XML file replace any <com.android.support.V4.ViewPager> tags with <com.yourpackage.CustomViewPager> tags.

This code was adapted from this blog post.

Answer 2

There is an easy fix for this one:

When you want to disable the viewpager scrolling then:

mViewPager.setOnTouchListener(new OnTouchListener() {

   public boolean onTouch(View arg0, MotionEvent arg1) {
      return true;
   }
}); 

And when you want to re-eanble it then:

mViewPager.setOnTouchListener(null);

That will do the trick.

Answer 3

Here is my light weight variant of slayton's answer:

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

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

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        return !isEnabled() || super.onTouchEvent(event);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {
        return isEnabled() && super.onInterceptTouchEvent(event);
    }
}

With my code you can disable the paging with setEnable().

Answer 4

I found a simple solution.

//disable swiping
mViewPager.beginFakeDrag();

//enable swiping
mViewPager.endFakeDrag();

Answer 5

I suggest another way to solve to this problem. The idea is wrapping your viewPager by a scrollView, so that when this scrollView is non-scrollable, your viewPager is non-scrollable too.

Here is my XML layout:

        <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/viewPager"
                android:layout_width="wrap_content"
                android:layout_height="match_parent" />

        </HorizontalScrollView>

No code needed.

Works fine for me.

Answer 6

To disable swipe

 mViewPager.beginFakeDrag();

To enable swipe

 mViewPager.endFakeDrag();

Answer 7

The best solution that worked for me is:

public class DeactivatedViewPager extends ViewPager {

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

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

    @Override
    public boolean canScrollHorizontally(int direction) {
        return false;
    }
}

After this the scroll will be disabled by touch and then you can still use setCurrentItem method to change page.

Answer 8

How about this :
I used CustomViewPager
and next, override scrollTo method
I checked the movement when doing a lot of small swipes, it doesn't scroll to other pages.

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;
    } 

    @Override
    public void scrollTo(int x, int y) {
       if(enabled) {
          super.scrollTo(x, y);
       }
    }
}

Answer 9

Here's an answer in Kotlin and androidX

import android.content.Context
import android.util.AttributeSet
import android.view.MotionEvent
import androidx.viewpager.widget.ViewPager

class DeactivatedViewPager @JvmOverloads constructor(
    context: Context, attrs: AttributeSet? = null
) : ViewPager(context, attrs) {

    var isPagingEnabled = true

    override fun onTouchEvent(ev: MotionEvent?): Boolean {
        return isPagingEnabled && super.onTouchEvent(ev)
    }

    override fun onInterceptTouchEvent(ev: MotionEvent?): Boolean {
        return isPagingEnabled && super.onInterceptTouchEvent(ev)
    }
}

Answer 10

The answer of slayton works fine. If you want to stop swiping like a monkey you can override a OnPageChangeListener with

@Override public void onPageScrollStateChanged(final int state) { 
        switch (state) { 
            case ViewPager.SCROLL_STATE_SETTLING: 
                mPager.setPagingEnabled(false); 
                break; 
            case ViewPager.SCROLL_STATE_IDLE: 
                mPager.setPagingEnabled(true); 
                break; 
        } 
    }

So you can only swipe side by side

Answer 11

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);
}

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

@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
    // stop swipe 
    return false;
}

@Override
public boolean onTouchEvent(MotionEvent event) {
    // stop switching pages
    return false;
}

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*/);
    }
}
}

Then in your Layout.XML file replace any --- com.android.support.V4.ViewPager --- tags with --- com.yourpackage.NonSwipeableViewPager --- tags.

Answer 12

New class ViewPager2 from androidx allows to disable scrolling with method setUserInputEnabled(false)

private val pager: ViewPager2 by bindView(R.id.pager)

override fun onCreate(savedInstanceState: Bundle?) {
    pager.isUserInputEnabled = false
}