Hello

howdy, Maria!

how can I help you today?

I want my server to send resized images to the phone and I'm wondering how/where I can find what is the right resolution and screen size for any particular phone.

that's impossible to answer in the abstract

insofar as I do not know what your business rules are for "right resolution and screen size"

suppose the phone is 5x7 and the resolution is 240 dpi

then the image I send should be that size or less

5 what by 7 what?

inches

you won't know that a phone is 5x7

?

DisplayMetrics will tell you sizes in pixels

ok

and what will tell me the resolution?

and Configuration (or DisplayMetrics? I forget) will tell you density

ok

that was my question

DisplayMetrics will tell you sizes in pixels (a.k.a., resolution)

is there anything else with which I can help you?

I'm not sure.

I'm reading about DisplayMetrics.

Mind if I hang out in case anyone else shows up?

sure, no problem

Ok.

odds are things will be fairly quiet, given the holidays

sure

howdy, Raza!

Hi Raza

how can I help you today?

Hello everyone

i want to know that which one is best SQLite or JSON?

I cannot answer that without knowing what criteria you are using to judge "best"

and how you intend to use them

i want to fetch list of client house from the app and every month the data will change

where is this list?

on web server

well, publish it in JSON on the Web server and download it

if you need to do things like searches, and the data structure looks like tables, consider importing the JSON into a SQLite table (or set of tablets)

if you do not need to do things like searches, just leave the JSON alone and use it directly

is it possible to insert JSON data into SQLite??

SQLite knows nothing about JSON

you could just put the JSON into a TEXT column

but I do not know why you would bother

you could read in the JSON, parse the data, and insert/update rows with more discrete columns

however, you only need to do that if you will actually be using those columns for something (e.g., queries)

otherwise, just leave the JSON alone and use it directly

howdy, Derrick!

Hi

Thanks for you help just now

you are most welcome

do you have an Android development question?

currently no

OK

i have not start yet

these chats are mostly to answer questions

you are welcome to hang out in the chat room if you like

is this book useful for beginners?

if anyone has a question, just ask

i have not done programming before

the books assume that you know Java

and have a reasonable amount of programming experience

ic

I have a question but I don't know if you can help me or not.

you will need other resources to learn Java

Maria: go ahead

i know a bit of java

may i know which country are u from?

Derrick: I live in the United States

icic...

I bought a samsung galaxy tab and sometimes when I connect it via the USB an app runs that asks if I want to mount the card but not always. Do you know what is going on there? Would plugging int the cable trigger and intent and you would need to have the application running to catch it?

trigger an intent

my typing is bad

IS is possible to compress the size of the app without breaking the app??

Maria: there are various ACTION_MEDIA Intents that are broadcast

Lately I've just been ignoring the mount sequence and using adb to push or pull files

Ok thanks

Maria: however, AFAIK, none are invoked simply because the USB cable is plugged in -- what you are seeing is an OS thing AFAIK

Raza: Using ProGuard will reduce the size of the app somewhat

Raza: done right, it will not break the app

any tutorial on icon design??

Raza: I have no tutorials on icon design, as I do not do icon design -- I have no particular graphics skills

the documentation covers icon design guidelines: http://developer.android.com/guide/practic…

however, they are written for people who know Photoshop

haha All programmers have same problem, they don't know how to design :)

there is also the Android Asset Studio: http://android-ui-utils.googlecode.com/hg/…

that site will take simple clip art and help convert it into icons meeting the design guidelines

thanks

Did you cover JSON parsing in the books??

actually, no, now that I think about it

or at least, not much

there are two parsers

the org.json classes existed from the beginning of Android

Android 3.0 added JSONReader

the difference is roughly similar to DOM versus SAX

JSONReader is much faster, but it is up to you to hold onto whatever data you want

and, of course, it only works on API Level 11 and higher

that's bad m targeting API level 10

personally, I haven't found the org.json stuff to be terribly slow

of course, it depends on how big the file is

again, it is similar to DOM versus SAX -- while DOM is much slower, that does not mean that you cannot use the DOM anywhere

you should cover some article on your books like JSON, Google API java client etc

I should add more JSON coverage

I will probably eventually cover the Google API client, now that they have an Android-specific library

yup

I have a very long to-do list for the books

any idea how JSON parser perform on EDGE connection??

parsers have nothing to do with network speed

ok

what's the criteria to short SQLite result based on location?? like nearest place come first

we are running out of time -- any last questions?

that is not easy

Thanks for you help and time Mark

if the locations are all nearby, you would effectively have to encode the Pythagorean theorem (square root of the sum of the squares of the longitude and latitude differences)

if the locations are significantly far apart, you have to start taking curvature of the Earth into account, using great circle calculations

my app reflect places from all over the country

there are algorithms for this online

how big is your country? :-)

India

that's pretty big

yup

for best accuracy, great circle calculations would be better

any link for that algo??

nothing handy, sorry

actually

there is a distanceBetween() method on Location that handles it

I had forgotten about that

last question how i save this chat conversation??

that wraps things up for today's chat

Raza: the transcript will be posted to the cw-android Google Group

Bye all

the next chat is tomorrow, 7:30pm US Eastern Time

have a pleasant day!

Bye