Browser versus App to present Web Data

by Fred Vinton » Fri, 17 Jul 2009 01:53:32 GMT

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 Looking for best practices to deploy
   a. tabular data, and
   b. plotted data with comments (title + legend + notes)
1. Display in browser with server generated static graphic plots, or,
2. Download raw data and plot with graphics primitives (API) within
Android's SDK? 50 - 500 data points.
- Volume of requests may be large.
- Time critical response on handheld
I am keenly interested in a sample that runs on the NDK (1.5) which
can authenticate to Google and communicate with an AppEngine datastore.


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1. SIGSEGV on free()

If that's all that you changed, and it "fixed" the
problem, then you WERE calling free() twice, likely
the same line of code was reached twice.  I wouldn't
call your logic really fixed, but at least now it
doesn't crash.


2. ListView.setChoiceMode with Custom Designed ListView rows Options

Hopefully this is a simple question.  I have an Activity that extends
ListActivity in which I populate ListView items from a database.  Each
row in that list view has a custom defined XML layout, in which there
is content consuming the entire width of the row. If I wanted to allow
users to act on multiple rows (for example, delete multiple rows via a
checkbox by each row), would I have to...

1. Define a checkbox in the row layout xml file myself?  This would
require that, upon choosing the "delete multiple rows" option I check
which rows have a checked checkbox and take action on those.


2. Can I somehow use the setChoiceMode(ListView.CHOICE_MODE_MULTIPLE)
option?  I have only seen examples where this is used with a non-
customized ListView.  I tried it, but my ListView rows did not change
from the default layout (i.e., no checkbox was seen).  I assume this
is due to my default row layout taking up the full width of the screen
already...or is it even possible/advisable to use setChoiceMode() with
a custom row layout?  I did see some funny behavior when I used
setChoiceMode where when I simulated swiping from right to left, the
content in my rows started getting jumbled up. Option #1 doesn't seem
too difficult, so if that's the best solution I have no problem with
that.  I was just curious of limitations using the setChoiceMode()

Thanks in advance!


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