为什么ViewPager不在RelativeLayout内滑动？

Question

After changing Linear Layout to Relative layout swipe change doesn't work.

Whole xml code here.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v4.view.ViewPager
        android:id="@+id/singleSlider"
        android:layout_width="match_parent"
        android:layout_height="@dimen/slider_height"
        android:background="@color/colorPrimaryDark" />

    <android.support.v4.widget.NestedScrollView
        android:id="@+id/singleScroll"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        ...

    </android.support.v4.widget.NestedScrollView>

</RelativeLayout>

What can be a problem?

It doesn't work also with Frame Layout.

Any suggestion?

Answer 1

The NestedScrollView is now above (z-axis) the ViewPager , so the ViewPager doesn't receive the touch events. Add

android:layout_below="@+id/singleSlider"

to your NestedScrollView .

Answer 2

I think your View-pager and NestedScrollView are overlapping earlier you are using Linear Layout . So it goes one by one but now in Relative Layout it is overlapping. Use layout_below attribute

Answer 3

right now your nested scroll view and your view pager are just 2 seperate things that over lap each other not sure if you want your view pager inside your nested scroll view or if you want the nested scroll inside of your view pager so i will show view inside the nested scroll

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v4.widget.NestedScrollView
        android:id="@+id/singleScroll"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v4.view.ViewPager
        android:id="@+id/singleSlider"
        android:layout_width="match_parent"
        android:layout_height="@dimen/slider_height"
        android:background="@color/colorPrimaryDark" />

    </android.support.v4.widget.NestedScrollView>

</RelativeLayout>

then when you call your scrollview

you can also set

android:fillViewport="true"

on the nested scroll view to Defines whether the scrollview should stretch its content to fill the viewport

if this is not what you wanted could you maybe show a mock up or something showing how you want it to function and I will edit my answer accordingly