Hauler and ViewPager

[DennyWeinberg]

I have the following layout:

<?xml version="1.0" encoding="utf-8"?>
<com.thefuntasty.hauler.HaulerView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/haulerView"
    app:dragUpEnabled="true"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.core.widget.NestedScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            xmlns:tools="http://schemas.android.com/tools"
            android:fitsSystemWindows="true">

            <View
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:id="@+id/dismiss_click_view"
                android:background="@color/details_preview_dialog_background" />

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="0dp"
                android:layout_height="0dp"
                app:layout_constraintWidth_percent="@dimen/details_preview_width_ratio_percentage"
                app:layout_constraintHeight_percent="@dimen/details_preview_height_ratio_percentage"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                >

                <androidx.cardview.widget.CardView
                    android:id="@+id/cardView"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_margin="8dp"
                    app:cardCornerRadius="@dimen/details_preview_rounding"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintStart_toStartOf="parent" >

                    <androidx.viewpager.widget.ViewPager
                        android:id="@+id/view_pager"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent" />

                </androidx.cardview.widget.CardView>

                <TextView
                    android:id="@+id/totalNumberOfPhotosTextView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    tools:text="2/1234"
                    android:textSize="9sp"
                    android:layout_margin="-50dp"
                    android:gravity="center"
                    android:height="@dimen/badge_size"
                    android:minWidth="@dimen/badge_size"
                    android:textColor="@color/badgeTextColor"
                    android:elevation="10dp"
                    android:background="@drawable/badge_secondary"
                    app:layout_constraintTop_toTopOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"
                    />

            </androidx.constraintlayout.widget.ConstraintLayout>

            <ProgressBar
                android:id="@+id/loadingProgressBar"
                style="@style/Widget.AppCompat.ProgressBar"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                app:layout_constraintTop_toTopOf="parent"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                android:elevation="10dp"
                />

        </androidx.constraintlayout.widget.ConstraintLayout>

    </androidx.core.widget.NestedScrollView>

</com.thefuntasty.hauler.HaulerView>

So a HaulerView with it's NestedScrollView, which contaisn a ViewPager.
It works, but the ViewPager needs to be scrolled exactly in a horizontal way in order to swipe to the next item, otherwise the HaulerView takes the wipe moved a bit up/down.
it there a way of defining the angle or a treshold or something to make the horizontal scroll prior to the vertical scroll, depending on the angle or something?

EDIT: With a maps fragment inside, I can't scroll the map anymore.

[viettranhoang]

I solved this by remove NestedScrollView in avtivity layout and add NestedScrollView into fragment of viewpager.