How to disable or enable viewpager swiping in android

What i am trying to do: I am trying to Enable/disable swiping in pager programatically when the program is running

Ex: When on the flow if i check for a condition and if it returns true enable swiping, and if condition returns false disable swiping.

Solution i am using is this one

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 builtin 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.

Problem with above methodology: i cannot set the property on the flow, I:e .... I either can enable swiping or disable swiping. But i cannot do this based on condition

Question:

  1. Can i achieve my goal in some-other way, if so what is it ?
  2. Or is this not possible ?
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最佳答案

Disable swipe progmatically by- 

    final View touchView = findViewById(R.id.Pager);
touchView.setOnTouchListener(new View.OnTouchListener()
{
@Override
public boolean onTouch(View v, MotionEvent event)
{
return true;
}
});

and use this to swipe manually

touchView.setCurrentItem(int index);
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In your custom view pager adapter, override those methods in ViewPager.

@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;
}

And to enable, just return each super method:

super.onInterceptTouchEvent(event) and super.onTouchEvent(event).

小开

I found another solution that worked for me follow this link

https://stackoverflow.com/a/42687397/4559365

It basically overrides the method canScrollHorizontally to disable swiping by finger. Howsoever setCurrentItem still works.

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This worked for me.

   ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener() {
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
// disable swipe
if(!swipeEnabled) {
if (viewPager.getAdapter().getCount()>1) {
viewPager.setCurrentItem(1);
viewPager.setCurrentItem(0);
}
}
}
public void onPageScrollStateChanged(int state) {}
public void onPageSelected(int position) {}
};
viewPager.addOnPageChangeListener(onPageChangeListener);
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Best solution for me. -First, you create a class like this:

public class CustomViewPager extends ViewPager {
private Boolean disable = false;
public CustomViewPager(Context context) {
super(context);
}
public CustomViewPager(Context context, AttributeSet attrs){
super(context,attrs);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
return !disable && super.onInterceptTouchEvent(event);
}


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


public void disableScroll(Boolean disable){
//When disable = true not work the scroll and when disble = false work the scroll
this.disable = disable;
}
}

-Then change this in your layout:<android.support.v4.view.ViewPager for this<com.mypackage.CustomViewPager

-Finally, you can disable it:view_pager.disableScroll(true); or enable it: view_pager.disableScroll(false);

I hope that this help you :)

小开

In my case, the simplified solution worked fine. The override method must be in your custom viewpager adapter to override TouchEvent listeners and make'em freeze;

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


}


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


}
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For disabling swiping

mViewPager.beginFakeDrag();

For enable swiping

if (mViewPager.isFakeDragging()) mViewPager.endFakeDrag();

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If you want to extend it just because you need Not-Swipeable behaviour, you dont need to do it. ViewPager2 provides nice property called : isUserInputEnabled

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To disable swiping in viewpager2 use

viewPager2.setUserInputEnabled(false);

To enable swiping in viewpager2 Use

viewPager2.setUserInputEnabled(true);

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