Android resource notlong / long identifiers not working

Question

Currently I have the following resource folders:
1. layout-sw600dp
2. layout-sw600dp-notlong

The idea is that we have 3 types of devices and the devices should use the resources from the correct folder accordingly. The devices are:
1. Samsung Galaxy Tab 10.1, 1280 X 800 mdpi. 16/10
2. Asus Transformer TFT 101, 1280 X 800 mdpi. 16/10.
3. A generic tablet, 800 X 600 ldpi. 4/3.

The problem is that all 3 devices use resources from layout-sw600dp-notlong. To my understanding 4/3 is categorized as -notlong devices.

Is there anything wrong in my identifier usage? Or there's a bug reported for the identifier?

Thank in advance.

score 2 · Accepted Answer · Aug 1 '12 at 22:12

up vote 2 down vote accepted

The 'notlong' identifier is for devices that are similar in aspect ratio to baseline devices (seehttp://developer.android.com/guide/practices/screens_support.html). While the docs are scarce on what baseline devices are, typical resolution of Android devices 1.5~1.6. So what you are seeing is correct.

While there is a 'long' identifier for devices that are longer than baseline ratios, it looks like you can't force resources for devices that are shorter (e.g. 800x600).

edited Aug 1 '12 at 22:12

answered Aug 1 '12 at 22:07

ebernie
93 8

Short question. Based on your explanation, shouldn't the 1280 X 800 resolution use the resource in -long folder and not -notlong? – Maziz Aug 1 '12 at 22:15

1280x800 has a ratio of 1.6. I'm assuming it is close enough to baseline (800/480 = 1.6, 480/320 = 1.5) that it's using the 'notlong' resources. So no, it won't use the 'long' resources. – ebernie Aug 2 '12 at 20:54

This sdk omission is a shame :/ – nobre Feb 6 at 19:39

ilsy 81 3 · Answer 2 · Aug 1 '12 at 4:25

up vote 0 down vote

you have read this doc?http://developer.android.com/guide/practices/screens_support.html#DeclaringTabletLayouts

answered Aug 1 '12 at 4:25

ilsy
81 3

I did, thanks for the link. Indeed yoou can specify the smallest width, but it's not the width of the application it's trying to adapt but the aspect ratio of the device. – Maziz Aug 1 '12 at 5:06

score 0 · Answer 3

According to the source code. (framework/base/core/java/android/content/res/Configuration.java)

 // Is this a long screen? if (((longSizeDp*3)/5) >= (shortSizeDp-1)) { // Anything wider than WVGA (5:3) is considering to be long. screenLayoutLong = true; } else { screenLayoutLong = false; }

So if the aspect ratio is wider than 3:5(or 1.667), it will be treated as long screen.

Android resource notlong / long identifiers not working

Android resource notlong / long identifiers not working

3 Answers

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