I'm using viewPager2 along with tab layout. I only have 2 fragments.
There is a RecyclerView in my second fragment and a swipe refresh layout.
My problem is when I try to swipe down to refresh , it conflicts with the Viewpager's vertical swipe and I'm not able to swipe down correctly. So is there a way to disable just the vertical swipe of view Pager ? I still want it to be able to swipe horizontally.
You can disable viewpager2 scroll by setting isUserInputEnabled to false
viewPager2.isUserInputEnabled = false
This will disable all events, but in your case i think you need to disable move down action only, you need to intercept touch listener and call requestDisallowInterceptTouchEvent(true) on view pager.
You can use this wrapper from google samples
/**
* Layout to wrap a scrollable component inside a ViewPager2. Provided as a solution to the problem
* where pages of ViewPager2 have nested scrollable elements that scroll in the same direction as
* ViewPager2. The scrollable element needs to be the immediate and only child of this host layout.
*
* This solution has limitations when using multiple levels of nested scrollable elements
* (e.g. a horizontal RecyclerView in a vertical RecyclerView in a horizontal ViewPager2).
*/
class NestedScrollableHost : FrameLayout {
constructor(context: Context) : super(context)
constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)
private var touchSlop = 0
private var initialX = 0f
private var initialY = 0f
private val parentViewPager: ViewPager2?
get() {
var v: View? = parent as? View
while (v != null && v !is ViewPager2) {
v = v.parent as? View
}
return v as? ViewPager2
}
private val child: View? get() = if (childCount > 0) getChildAt(0) else null
init {
touchSlop = ViewConfiguration.get(context).scaledTouchSlop
}
private fun canChildScroll(orientation: Int, delta: Float): Boolean {
val direction = -delta.sign.toInt()
return when (orientation) {
0 -> child?.canScrollHorizontally(direction) ?: false
1 -> child?.canScrollVertically(direction) ?: false
else -> throw IllegalArgumentException()
}
}
override fun onInterceptTouchEvent(e: MotionEvent): Boolean {
handleInterceptTouchEvent(e)
return super.onInterceptTouchEvent(e)
}
private fun handleInterceptTouchEvent(e: MotionEvent) {
val orientation = parentViewPager?.orientation ?: return
// Early return if child can't scroll in same direction as parent
if (!canChildScroll(orientation, -1f) && !canChildScroll(orientation, 1f)) {
return
}
if (e.action == MotionEvent.ACTION_DOWN) {
initialX = e.x
initialY = e.y
parent.requestDisallowInterceptTouchEvent(true)
} else if (e.action == MotionEvent.ACTION_MOVE) {
val dx = e.x - initialX
val dy = e.y - initialY
val isVpHorizontal = orientation == ORIENTATION_HORIZONTAL
// assuming ViewPager2 touch-slop is 2x touch-slop of child
val scaledDx = dx.absoluteValue * if (isVpHorizontal) .5f else 1f
val scaledDy = dy.absoluteValue * if (isVpHorizontal) 1f else .5f
if (scaledDx > touchSlop || scaledDy > touchSlop) {
if (isVpHorizontal == (scaledDy > scaledDx)) {
// Gesture is perpendicular, allow all parents to intercept
parent.requestDisallowInterceptTouchEvent(false)
} else {
// Gesture is parallel, query child if movement in that direction is possible
if (canChildScroll(orientation, if (isVpHorizontal) dx else dy)) {
// Child can scroll, disallow all parents to intercept
parent.requestDisallowInterceptTouchEvent(true)
} else {
// Child cannot scroll, allow all parents to intercept
parent.requestDisallowInterceptTouchEvent(false)
}
}
}
}
}
}
Then wrap your view pager contents -recyclerView- ,
<androidx.viewpager2.integration.testapp.NestedScrollableHost
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="8dp">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/first_rv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF" />
</androidx.viewpager2.integration.testapp.NestedScrollableHost>
ViewPager2 scrolling Disable viewPager2 user input scrolling disable.
import androidx.viewpager2.widget.ViewPager2;
private ViewPager2 viewPager;
viewPager = findViewById(R.id.view_pager);
viewPager.setUserInputEnabled(false);
