Multiple pages at the same time on a ViewPager

Question

Is there a possibility to display two pages at the same time, when using a ViewPager? I'm not looking for an edge effect, but rather for two full pages at the same time.

Answer 1

Please have a look at the getPageWidth Method in the corresponding PagerAdapter. Override it and return e.g. 0.8f to have all child pages span only 80% of the ViewPager's width.

More info: http://developer.android.com/reference/android/support/v4/view/PagerAdapter.html#getPageWidth(int)

Answer 2

See my more up-to-date answer here: Can ViewPager have multiple views in per page?

I discovered that a perhaps even simpler solution through specifying a negative margin for the ViewPager. I've created the MultiViewPager project on GitHub, which you may want to take a look at:

https://github.com/Pixplicity/MultiViewPager

Although this question specifically asks for a solution without edge effect, some answers here propose the workaround by CommonsWare, such as the suggestion by kaw.

There are various problems with touch handling and hardware acceleration with that particular solution. 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:

<dimen name="viewpager_margin">-64dp</dimen> 

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:

<dimen name="viewpager_margin_fix">32dp</dimen> 

(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: