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Asked: 2020-07-23 10:07:45 +0800 CST 2020-07-23 10:07:45 +0800 CST

Why does vpv.iso.com.viewpagervertical.VerticalViewPager get an error?

  • 772

I am following this tutorial: https://www.youtube.com/watch?v=VQwZQz9qsDA but when I have to do the activity_main I do it as is:

<vpv.iso.com.viewpagervertical.VerticalViewPager
    android:id="@id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

but it gives me the following error

enter image description here

Caused by that, I don't know how to make the vertical slider work anymore, it just fails me there. I think it also has to do with the fact that at the start of the video he has 2 folders created with that name and I don't, and that I have created an xml called pager.xml that only has the following:

<resources>
<item
    type="id"
    name="pager" />
</resources>
android-studio

1 Answers

  1. Best Answer

    The problem indicates that you are trying to create the view:

    <vpv.iso.com.viewpagervertical.VerticalViewPager
    android:id="@id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

    but the class VerticalViewPagerdoes not exist in the indicated package ( vpv.iso.com.viewpagervertical.) in your project. The view that you add to your layout must be created via code.

    I suggest you use for example this class in your project:

    https://android.googlesource.com/platform/packages/apps/DeskClock/+/master/src/com/android/deskclock/VerticalViewPager.java

    Check this example:

    https://stackoverflow.com/questions/18413309/how-to-implement-a-viewpager-with-different-fragments-layouts/46825489#46825489

    enter image description here

    • 1