Android resource notlong / long identifiers not working

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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.

android screen ratio

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edited Aug 1 '12 at 4:37

asked Aug 1 '12 at 4:00 Maziz
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3 Answers

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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).

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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

up vote 0 down vote

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

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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

up vote 0 down vote

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(安卓)resource notlong / long identifiers not working

Android resource notlong / long identifiers not working

3 Answers

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