headerDividersEnabled not respected on some devices - android

I've tried this on a few devices but it looks like the headerDividersEnabled property I have set to true for my listview isn't respected on all devices. As an example I've uploaded how the app renders on my different devices. Header is the blue bar plus join our tournaments section. Only the first listed device properly displays the header divider as specified.
Samsung Galaxy S3
Android 4.4.4 - cyanogenmod 11-20150831-SNAPSHOT-XNG3CAO3FN-d2lte
http://imgur.com/ab6TBkI
Samsung Galaxy S3
Android 4.2.2 - cyanogenmod 10.1.3-d2att
http://imgur.com/OwkfK69
LG Lucid 2
Android 4.1.2 - Xperion_l1v_11-2-2014
http://imgur.com/vVw38A2

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App not supported in Android Market for samsung tab 2 - GT-P3100 tablet

I am creating an application only for tablets (7 and 10.1 inch). I put below the code in my android manifest file: I put my app in Android market. But it's not showing up in my Samsung Galaxy tab 10.1. In that support device is only 7 inch Tablets. I want my app for both 7 inch and 10.1 inch but samsung galxt tab2-GT-P3100 is unsupported device in google play . Please, some one help me to solve this problem.

Android reference devices for responsive webdesign

Which devices (smartphone and tablet) do you recommend to buy as reference?
And what version of Android do you prefer?
Main goal: testing responsive websites in our small web studio.
Smartphones:
Samsung Galaxy — S2, S3, S4 (but S4 and S3 seem to be too expensive).
Google Nexus 4.
4.0 — 4.5 branded devices in middle cost segment.
bi-brands or Chinese devices (low cost, Android 4.1+).
Tablets (I think, only 9.7/10.1 inches not 7 inches):
Samsung (dunno which).
Chinese devices.
We have limited resources, so…
I would go for Google Reference Devices, as they always go through all Android versions, and they have always the latest version available. Right now they are:
Nexus 7 (2012 and 2013 versions). 2012 version is the most sold Android Tablet. also works as a reference Portrait Tablet.
Nexus 4
Nexus 10. Reference Landscape Tablet.
Nexus One or Nexus S for a reference Android Gingerbread device.
Then, if you have the budget, I would go for typical best sellers in all ranges:
Galaxy S2, S3 and S4
Galaxy Y, Ace, HTC Desire X
Samsung Galaxy Tab 7, 8.9 and 10.

Android Install Location Auto Not Working

I've set installocation="auto" in the manifest and on most devices this works.
Doesn't Work (No option to move to SD Card):
Razr Max HD (Android 4.0)
Samsung GS3 (4.0 and 4.1)
Samsung Note 2 (4.0)
Droid 4 (Android 4.0). This only said it would move to internal space however error'ed out saying there was no space (wrong).
Works:
Rooted, Incredible (4.1)
Samsung Note 1 (2.3.6)
Any ideas? It seems like +4.0 doesn't want to recognize the tag.
Some phones (such as the Razr Max HD and Galaxy S3) simply do not support moving apps to the SD card. Manufacturers unfortunately have the ability to remove this feature from their Android releases, and some use that power.

Can I develop for Android Tablets without an actual tablet device?

I bought the Augen Gentouch78 to start dabbing in development for Android tablets, but this device is gravely excruciating to use (and I'm returning it). Is there a way to configure the emulator to tablet specs (namely Samsung Galaxy Tab)??
You could create an AVD with similar hardware and Android 2.2. The main difference is the resolution (which is 600x1024), so you can try configuring your AVD this way:
Just keep in mind the AVD limitations; for instance, they don't support multitouch.
Install the GALAXY Tab addon by Samsung, it adds a API-8 Galaxy Tab target to the options list in the AVD creation screen.
The Honeycomb tablet require a API level 11 or 12 on WXGA skin.

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