BrowserStack's Screenshots service lists Android devices by manufacturer, which isn't very helpful. They are ordered here by version.
BrowserStack has additional devices via their Live testing service, which does a better job of displaying the devices by OS version and type. It also lists device resolution. Listing the DPI would be a great addition.
An asterix (*) denotes a tablet.
Android 2.2 Froyo
- Samsung Galaxy S
- HTC Wildfire
- LG Optimus 3D
Android 2.3 Gingerbread
- Samsung Galaxy S II
- Samsung Galaxy Note
- Motorola Droid Razr
- Motorola Droid 4
Android 4.0 Ice Cream Sandwich
- Samsung Galaxy Nexus
- Motorola Atrix HD
- HTC Evo 3D
- HTC One X
- Sony Xperia Tipo
- Amazon Kindle Fire 2*
- Amazon Kindle Fire HD 8.9*
- Samsung Galaxy Note 10.1*
- Samsung Galaxy Tab 2 10.1*
Android 4.1 Jelly Bean
- Samsung Galaxy S III
- Samsung Galaxy Note II
- Motorola Razr Maxx HD
- Google Nexus 7 (2012)*
Android 4.2 Jelly Bean
- LG Nexus 4
It is recommended that you test at least one of each OS version, particularly because many people still use Gingerbread. According to sources Samsung phones are the most popular Android phone.
Try to get a mix of [M]DPI (1), [T]VDPI (1.33), HDPI (1.5) & [X]HDPI (2.0 aka Retina) resolutions. Note that 3.0 DPIs exist.
- Samsung Galaxy S
- HTC Wildfire [M]
- Samsung Galaxy S II
- Motorola Droid Razr [M]
- HTC One X [X]
- Amazon Kindle Fire 2*
- Amazon Kindle Fire HD 8.9 [X]*
- Samsung Galaxy S III [X]
- Google Nexus 7 (2012) [T]*
Sources