How to migrate from Gallery to HorizontalScrollView & ViewPager?

Question

I need simple control for icon choosing on Android 2.2 and higher.
Gallery was a better solution for me, but it is deprecated and I have to use HorizontalScrollVie

Answer 1

There are various problems with touch handling and hardware acceleration in CommonsWare's linked workaround. A simpler and more elegant solution, in my opinion, is to specify a negative margin for the ViewPager:

ViewPager.setPageMargin(
    getResources().getDimensionPixelOffset(R.dimen.viewpager_margin));

I then specified this dimension in my dimens.xml:

-64dp

To compensate for overlapping pages, each page's content view has the opposite margin:

android:layout_marginLeft="@dimen/viewpager_margin_fix"
android:layout_marginRight="@dimen/viewpager_margin_fix"

Again in dimens.xml:

32dp

(Note that the viewpager_margin_fix dimension is half that of the absolute viewpager_margin dimension.)

We implemented this in the Dutch newspaper app De Telegraaf Krant: