Office Hours — Today, August 18
| Aug 18 | 3:55 PM |
| Mark M. | has entered the room |
| Mark M. | turned on guest access |
| Aug 18 | 4:00 PM |
| Stas | has entered the room |
| Mark M. |
hello, Stas
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| Mark M. |
how can I help you today?
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| Stas |
Hello, Mark!
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| Mark M. |
Stas: do you have a question?
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| Stas |
I have problem with listView. I want to do overlap items. Example picture: https://drive.google.com/file/d/0B9fIktVuXDazWU...
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| Mark M. |
um, I don't have permission to view that link
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| Mark M. |
you can upload it via the "Upload a file" link on the right of the chat window
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| Stas | |
| Aug 18 | 4:05 PM |
| Mark M. |
um
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| Mark M. |
you could try some negative margins, I gues
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| Mark M. |
er, I guess
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| Mark M. |
but if I wanted that look, I'd be running to the Android Arsenal and praying that somebody has a library for it
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| Mark M. |
or, if there's an existing app that you know of that offers this, use uiautomatorviewer or Hierarchy View to see how they did it
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| Stas |
i'm developing this app. I tried override method in listview, but did not work
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| Aug 18 | 4:10 PM |
| Mark M. |
sorry, other than the suggestions I list above, I don't have any other recommendations
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| Mark M. |
that sort of effect is not something I normally mess with
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| Mark M. |
if you have another question, go right ahead -- it's a quiet chat room today :-)
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| Stas |
maybe use RelativeLayout instead listView and add items in code?
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| Mark M. |
that could work... but how many rows will you have?
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| Stas |
About 20-30
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| Aug 18 | 4:15 PM |
| Mark M. |
is the screenshot that you uploaded a mockup of what the app is supposed to look like?
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| Stas |
yes
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| Mark M. |
20-30 bitmaps like that could get you in some trouble from a memory management standpoint, depending upon what else you are doing
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| Mark M. |
the nice thing about AdapterView is its help in recycling rows, and the things the rows reference (e.g., bitmaps)
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| Mark M. |
so, you're welcome to try the RelativeLayout-in-ScrollView approach, but you may just be swapping in one problem for another
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| Aug 18 | 4:20 PM |
| Stas |
View paste
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| Mark M. |
I have never tried overriding onChildDraw(), so I have no idea how well that approach would work, sorry
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| Aug 18 | 4:35 PM |
| Stas |
Ok, thanks. Can you advice lib for load and show bitmap with memory cache? I use Universal Image Loader, but img load slowly. maybe resize them befor?
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| Stas |
ups, show instead load )
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| Mark M. |
in the book, I demonstrate the use of Picasso and Ion
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| Mark M. |
I have not used Universal Image Loader personally
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| Stas |
not memory cach in Picasso
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| Stas |
cache
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| Mark M. |
they rely on the HTTP layer for that, correct
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| Mark M. |
Ion offers memory caching
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| Mark M. |
with regards to performance, use Traceview to determine where in the library the time is being spent
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| Mark M. |
it's certainly possible that you would see some benefit from saving scaled images, if you anticipate needing them at that scaled resolution later
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| Aug 18 | 4:40 PM |
| Stas |
have ion disk caching?
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| Mark M. |
yes, at least according to the README
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| Mark M. | |
| Mark M. |
View paste
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| Aug 18 | 4:45 PM |
| Stas |
Thank you very much! Good Bye.
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| Aug 18 | 4:50 PM |
| Mark M. |
the chat transcript will be posted to http://commonsware.com/office-hours/ shortly after the chat ends
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| Aug 18 | 5:00 PM |
| Stas | has left the room |
| Mark M. | turned off guest access |
