[renato.guiglia]

I published a native app for android and Ios.
My app has some select list menu built dynamically from db and all works very well on android 2.3 (Samsung galaxy Gio) and 4.2.2 (Google Nexus and Nexus 7).
I installed my app on an android 4.0.3 (LG Optimus L5) and i have following problems:

Scrolling the list is very slow
If i touch an item, it doesn’t become “selected”
It seems that selection happens next time that i touch, interface is delayed by a touch

Do you have any suggestion?

[support-octavio]

Hi renato,

What mobione version are you using?
How big is your app?
How many items contains the list?
Does just this app render slowly? how do other apps in LG Optimus L5 render?

[renato.guiglia]

@support-octavio wrote:

Hi renato,

What mobione version are you using?

2.3.2
@support-octavio wrote:

How big is your app?

The final .apk is 1.3MB (15 pages).
@support-octavio wrote:

How many items contains the list?

10
@support-octavio wrote:

Does just this app render slowly? how do other apps in LG Optimus L5 render?

I also tried the tutorial app “custom-list”: also this app is slow and when you touch an item, a wrong one was selected (e.e. i touch item 7 and item 5 is selected).

[support-octavio]

Hi Renato,

Could you try next set of files and share the results with us? The objective is to learn how lists behave on your hardware.

Attachments:

You must be logged in to view attached files.

[renato.guiglia]

@support-octavio wrote:

Hi Renato,

Could you try next set of files and share the results with us? The objective is to learn how lists behave on your hardware.

Sorry, i was quite busy last days.
I made some test with the LG and a Google Nexus.

Test1
nexus: scroll it’s quick, selection is right, but i don’t have full scroll: item1 and item2 are hidden, i see them only scrolling a little more (it’s ok, in test center happens the same behaviour, it’s a design error).
LG: scroll is really slow, i see an higlight effet only on my first touch, then i can’t see any selection highlight.

Test2
nexus: same as test1
LG: same as test1

Test3
nexus: same as test1. List size has no effect on scrolling.
LG: same as test1. List size has no effect on scrolling. It takes a litter more time loading the app.

Test4
nexus: same as test1. List size has no effect on scrolling.
LG: same as test1. List size has no effect on scrolling. It takes a litter more time loading the app.

Renato

[support-octavio]

Hi renato,

Could you try to browse regular websites from LG device and share if the performance is low.

[renato.guiglia]

@support-octavio wrote:

Hi renato,

Could you try to browse regular websites from LG device and share if the performance is low.

i tried: bbc, cnn, gazzetta.it, corriere.it, alice.it

The performance are regular, the only website that is quite slow is alice.it when i touch and accordion, it takes a little to expand.

[support-octavio]

Hi renato,

Thanks for the information. Can you tell me what browser did you use to navigate those websites? google chrome? default android browser?

[renato.guiglia]

@support-octavio wrote:

Hi renato,

Thanks for the information. Can you tell me what browser did you use to navigate those websites? google chrome? default android browser?

i used Firefox and default android browser (same performance).

[support-michael]

Scrolling lists of elements with gradient or image backgrounds can be computation expensive. Based on your observations I strongly suspect the LG either does not have advanced graphics hardware or the web engine does not have access to it (very likely the latter). In such cases the only thing you can do is reduce the rendering demands on your hardware as much as possible. For example remove all gradient and image background; use solid color background. And eliminate all image scaling. Unfortunately we do not have access to LG devices to evaluate the performance issue you are observing.

[renato.guiglia]

@support-wayne wrote:

Scrolling lists of elements with gradient or image backgrounds can be computation expensive. Based on your observations I strongly suspect the LG either does not have advanced graphics hardware or the web engine does not have access to it (very likely the latter). In such cases the only thing you can do is reduce the rendering demands on your hardware as much as possible. For example remove all gradient and image background; use solid color background. And eliminate all image scaling. Unfortunately we do not have access to LG devices to evaluate the performance issue you are observing.

thank you for the support.
It’s not a problem, it’s important to know that could be some problems with some devices, so i have to remove them from supported devices in android market.
Mobione is a great product, you cannot test every device 🙂

Could be useful to add a sticky thread with known issue on various devices.

[Author]

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