Question

Does the ViewPager have to be the only object present inside the activity layout?
I’m trying to implement something like this:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/reader_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<android.support.v4.view.ViewPager
    android:id="@+id/page_viewer"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

<Gallery
    android:id="@+id/miniatures_gallery"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" /></LinearLayout>

Where should I have a big pager scrolling in the top (and I have it) and a smaller gallery scrolling under that.
This shows me only the pager and not the gallery.
Any suggestion?

Answer 1

The ViewPager does not support wrap_content as it (usually) never have all its children loaded at the same time, and can therefore not get an appropriate size (the option would be to have a pager that changes size every time you have switched page).

You can however set a precise dimension (e.g. 150dp) and match_parent works as well.
You can also modify the dimensions dynamically from your code by changing the height-attribute in its LayoutParams.