library for realtime graph plot - IDEs, Libraries, & Programming Tools

Hello
I have to develop an app in which I have to plot a graph in real time .
Which library do you suggest to use ?
Thanks :good:

I'm using jjoe64 GraphView. It support real time

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[31st Mar 09 - Updated 1.0.1.0] MySkiBuddy (gps skiing app with instant feedback)

Hi,
I've just finished an app for windows mobile specifically for skiers that allows you to view your average and top speed, as well as the distance covered for your last run. It also keeps track of your total distance traveled as well as your highest speed ever achieved.
All information is displayed on one easy to read screen. It has a "reset run" feature which allows you to clear your last run statistics ready to collect data for your next run, or to challenge your friend to beat your record.
Version 1.0.1.0
Features Added:
* Option to use Metric system(km, km/h, meters)
* Notification will now pop-up when an Update is available
Bugs Fixed:
* Fixed bug where app wouldn't shutdown correctly on first registration
* Fixed bug where some devices were unable to display altitude
* Minor tweeks
There is a feature limited trial verion which is restricted to viewing your average speed for a run, your current altitude and your direction of travel.
Attached is a screen shot. It runs in a trial mode until registered. To register I'm asking for a donation of £1.50 to help support ongoing development.
For more information or to download my app please go to my site: http://www.fehnerssoftware.co.uk
Awesome. I will definitely give this a try next time i'm on the mountain.
Logs said:
Awesome. I will definitely give this a try next time i'm on the mountain.
Click to expand...
Click to collapse
If you do let me know what sort of speed you get up to 47mph is my pb so far.
Check your PM's
Is this app fast enough to keep up with a vehicle speed? It would be great for checking speed and heading in a car or motorcycle. You could change some wording and rename to something like MyAutoBuddy and release it as another app!
I'd love to have that for my phone
furry said:
Is this app fast enough to keep up with a vehicle speed? It would be great for checking speed and heading in a car or motorcycle. You could change some wording and rename to something like MyAutoBuddy and release it as another app!
I'd love to have that for my phone
Click to expand...
Click to collapse
Yup It can keep track of vehicle speed easily, thats mostly how I tested the app out I've only actually been skiing with it once
For a vehicle what would you want to see? currently it shows average speed, top speed for run, top speed ever reached, distance that run, total distance over all runs, direction of travel, and altitude.
Allthough designed for skiing it can be used for running, cycling etc.
Compile Maps?
I went boarding last month and searched around for piste maps for my sat nav, but no joy.....
Think you could develop this to record the route taken and then view on google maps for example......?
If you got enough users to be able to upload data it wouldn't be long before you compiled piste routes and speed records etc......?
Just a thought......
brandall said:
Think you could develop this to record the route taken and then view on google maps for example......?
Click to expand...
Click to collapse
I can add the ability to log the gps data so that it can be viewed in google earth, google maps etc.
First post updated with change history

real time location tracking in background

forgive my noobness
will android OS allow me to code a program that runs in the background while continuously uploading GPS data to a third party server?
black_squirrel_bx said:
forgive my noobness
will android OS allow me to code a program that runs in the background while continuously uploading GPS data to a third party server?
Click to expand...
Click to collapse
Sure... but it will kill your battery very quickly, a few cardio training apps do this.
Nanan00 said:
a few cardio training apps do this.
Click to expand...
Click to collapse
can you expand on cardio apps? do they help to improve battery life under high power consumption situations or are they like a pseudo task manager? yeah, a lot of the information i have been garnering has been saying that constant use of GPS data substantially affects battery life.
what if i were to use cell tower triangulation? could a program freely access information relating to cell tower locations or would i have to get permission from the provider?
black_squirrel_bx said:
can you expand on cardio apps? do they help to improve battery life under high power consumption situations or are they like a pseudo task manager? yeah, a lot of the information i have been garnering has been saying that constant use of GPS data substantially affects battery life.
what if i were to use cell tower triangulation? could a program freely access information relating to cell tower locations or would i have to get permission from the provider?
Click to expand...
Click to collapse
I think he means that a number Cardio (exorcise helper) apps tend kill peoples battery pretty fast as they do make constant use of the gps.
As i understand it (and bear in mind i'm a total noob with android development too) the android location api's can provide cell tower location based location info just as easily as GPS, the only limitation is that it is less accurate.
Assuming you don't need to the second updates, maybe it would be worth ether polling the location only every so often (say 10 minutes), or even just linking in with googles existing latitude service.
Hopefully that helped/made sense
P.S. First post
another thing, can you have apps that start automatically when the phone is turned on, like startup programs on a pc or mac?
opengeotracker .org is the program I use when I go on trips. Setting an update time of 5-10 minutes means it isn't that bad on the battery. It is open source and you can run the tracking website yourself so you don't have to rely on someone else keeping their webserver up.

Exact timing - Metronome

I'm a newbie to development on Android, and I'm trying to learn through developing a simple Metronome app. The app that I've developed uses soundPool with 2 samples, and I've tried using either a Timer or a thread with nano calculation of sleep time but the sound never happens accurately.
Can anyone direct me to how I can get exact timing for developing such a app?

Beam me Up Scotty !

You need to promote your app but you do not have any advertising budget?
Post it in this thread.
I will download and rate it
I do not know if it will be 5 stars review but i will review it for sure.
Theoretically if there where a 1000 of devs on this forum wanting to participate in this kind of promotion, and spent 5-10 minutes for app download every day, we could beam up any of apps to top new free category or at least you will not start with nothing, few stars at start may help you a lot.
My LWP's:
https://play.google.com/store/apps/details?id=com.zibi.hypercolor.next
https://play.google.com/store/apps/details?id=com.zibi.starfield
https://play.google.com/store/apps/details?id=com.zibi.hyperdroid.next.next
https://play.google.com/store/apps/details?id=com.pawel.easyscaleruler
Thank you,
Pawel
Try out Sidebar Lite or Pro!
http://forum.xda-developers.com/showthread.php?t=2152373
HexaPulse Icons
https://play.google.com/store/apps/...t=W251bGwsMSwxLDEwMiwiY29tLmFkaXR5YS5oZXhhIl0.
My apps:
HERE
Choose whichever (free ones) you guys want to download and review
I have downloaded some here and reviewed them. look for user name Eraste Trahan in your review list<-- thats me!
Your welcome!
Nice wallpaper apps. Given the number of downloads of your apps, if you have a paid version you could be earning some good cash.
Anyway, thank you for your initiative and here's my apps:
Rainbow Shopping List - the first collaborative shopping list with Artificial Intelligence
Rainbow Compare - visual unit price comparator
Check it out
Great Idea
Would be great if you could rate mine: https://play.google.com/store/apps/details?id=matt.obeney.picturetheword Thanks!
This is a great idea!!
https://play.google.com/store/apps/details?id=com.oadigital.twxter.demo
Here's my app - Twxter for Android! Please give it a look, and I'll be downloading all your apps shortly (Look for a review by Aaron )
Chartix - Android Music Charts
This is great idea.
Can you guys help sharing my app, rate and review it? Because I just published it today, your help will be much appriciated.
Hope I get good response.
Chartix - Android Music Charts
All my other app!
My app is called deScribe:
deScribe is a combination of Pictionary and Telephone which you can play in your spare time over the internet. You can draw the things that someone else describes or you can describe the things that someone else draws. The funny thing is, it never stays the same for long.
Here is my app Screen maker
This app merges screenshot with android device frame
https://play.google.com/store/apps/details?id=com.jyvee.fylee
Thanks!
This is my first android app. It's called Ambient LED Flashlight.
It is the first app that automatically turn on/off the camera LED depending on the lighting condition.
It's completely free and ad-free. try it
WidgetShade.
Thank you!
Can you review this?
https://play.google.com/store/apps/details?id=com.dapaua.widgetsoverlayfree
EDIT: I saw that your Hyperdroid link in your signature is missing a ".next" at the end.
I want to introduce my App "Modern Snake" that is a modern version of the classic “Snake” game which combines a simple gameplay with a minimalistic and elegant design.
The player can control the snake which is moved on the large playing area that fills the entire screen either by swiping or using buttons.
Sounds, the ability to share the score, a two-player mode on one device, and the fact that the game is free and comes without any ads, complete the app.
Features:
- minimalistic and elegant design based on Android's “Holo” theme
- large playing area that fills the entire screen
- simple control by swiping or by buttons
- enabling sound and adjust speed
- highscore and the ability to share the score
- two-player mode on one device
- ad-free
Play-Store-Link: https://play.google.com/store/apps/details?id=de.jsapps.modernsnake
Thanks for your attention!
Here's mine! https://play.google.com/store/apps/details?id=com.codfishworks.msafe
A password management app for paranoid people
It allows encrypting passwords and saving them on NFC tags or on QR codes to print on normal sheets of paper.
Unfortunately I can't post links yet, but feel free to search "Save The Earth - Alien Shooter" on Google Play.
Well we should vote and rate each other and put 5 stars we should support us, i will download all the apps here and i will rate idk maybe we should use a "code" just to know, perhaps i guess rating 5 stars or several its against rules LOL anyways rate my apps:
a car dashboard
https://play.google.com/store/apps/details?id=com.nezdroid.mycardashboard
this fix a security flag , take a look
https://play.google.com/store/apps/details?id=com.nezdroid.lockscreenprotector
I like this idea! So here goes my apps:
Expense tracker for friends & family on holiday: https://play.google.com/store/apps/details?id=com.mcaldas.iouom_ad
Schedule daily reboots for your device: https://play.google.com/store/apps/details?id=mobi.funkapps.realschedulereboot.lite
Beautiful babes in bikini: https://play.google.com/store/apps/details?id=mobi.funkapps.sexyofday
Thanks a lot!
---------- Post added at 10:34 AM ---------- Previous post was at 09:40 AM ----------
jojosch93 said:
I want to introduce my App "Modern Snake" that is a modern version of the classic “Snake” game which combines a simple gameplay with a minimalistic and elegant design.
The player can control the snake which is moved on the large playing area that fills the entire screen either by swiping or using buttons.
Sounds, the ability to share the score, a two-player mode on one device, and the fact that the game is free and comes without any ads, complete the app.
Features:
- minimalistic and elegant design based on Android's “Holo” theme
- large playing area that fills the entire screen
- simple control by swiping or by buttons
- enabling sound and adjust speed
- highscore and the ability to share the score
- two-player mode on one device
- ad-free
Play-Store-Link: https://play.google.com/store/apps/details?id=de.jsapps.modernsnake
Thanks for your attention!
Click to expand...
Click to collapse
I really like the minimalistic design? Are you using AndEngine, if I may ask?
App installed, rated and reviewed!

No. 1 D5 heart rate moitor app

Hey Hey,
here is the new version of my heart rate app for the D5. Features are:
- Always On heart rate monitoring
- defining intervals and duration of heart rate monitoring
- turn heart rate sensor on/off
- show the sensor data on your watchface
- log Sensor data
- log Accelerometer data
- chart Sensor data
Here is the link:
1.5 beta: https://mega.nz/#!2tFhWBqC!FcmKdUblrOQiLDd-WRNmBOzhEZqWAEk6mp05Qulvy6s
SensorLib for D5:
https://github.com/fisch92/SensorLib
Old Versions:
1.4: https://mega.nz/#!e5FRFAgZ!3glFDXdyZrQrKtbh22h7qHTYJ3c-AeAg0osSLlapilY
Knowing Bug:
- Create the chart is a little bit slow
Next version:
- classify with the accelerometer data your activity
- do some stuff at custom activities (gesture detection)
I need your help:
- First of all I improved the hr measure or I hope it. Can you share your experience with me, because there are some other measure methods which supported by the hr sensor and I haven't other devices to test the accuracy
- Second I add accelerometer measurement. I want to classify your activity like google fit and also I want to detect custom gesture with this but I fear that this drains the battery too much. Tell it me if you notice this, please
Also I want to develop a library to make the usage of sensors easy for other Developers
fisch92 said:
Hey Hey,
here is my first Test with the heart rate sensor. Features are:
- Always On heart rate monitoring
- defining intervals and duration of heart rate monitoring
- turn heart rate sensor on/off
- read the sensordata from your watchface
Here is the link:
https://mega.nz/#!yxUgybBI!gzSeRBMUf1V10T_ilJ5TcvJ76qrClxieOGQdKBIQWVo
Knowing Bug:
- I think the app should build the mean of the heartrate over time to improve the current value. Actually it's a little bit volatile.
- Heart rate monitoring stops when display goes off
- Turn On/Off option is not working.
Next version:
- fix the Bugs
- log the Data into a Database on your Device
- chart Data
- will come soon
Click to expand...
Click to collapse
thanks for the thread, i downloaded the app to my pc and then copied it to Download folder on the watch and from the watch i tried to install it by opening it but it did'nt let me, since it is an apk file i did'nt extract it on my pc. i will download it again and see what will happpen. geat job hope others will follow you especially in the metter of better notification app that will include a way to answer calls from it.
Hey Hey,
here is the new version of my heart rate app for the D5. Features are:
- Always On heart rate monitoring
- defining intervals and duration of heart rate monitoring
- turn heart rate sensor on/off
- read the sensordata from your watchface
- log Sensordata
- chart Sensordata
Here is the link:
https://mega.nz/#!O9EWnRTQ!EgFhxvpK2TVSOmETOjBuuz9eUO-Q95zr7UtMvG8sfe8
Old Version:
https://mega.nz/#!yxUgybBI!gzSeRBMUf1V10T_ilJ5TcvJ76qrClxieOGQdKBIQWVo
Knowing Bug:
- Create the chart is a little bit slow
Next version:
- try to enrich heart rate Data (yesterday I ride my bike and I ride on a hill I needed no sensor to know that my heart rate is pretty high. So I looked at my app, it shows a hr of 54 I try the system app ... same result)
- add compass
Also I want to develop a library to make the usage of sensors easy for other Developers
Will this work with the X5?
caltomoto said:
Will this work with the X5?
Click to expand...
Click to collapse
I don't know, but I think it should work. You can try it and tell us your results
fisch92 said:
try to enrich heart rate Data (yesterday I ride my bike and I ride on a hill I needed no sensor to know that my heart rate is pretty high. So I looked at my app, it shows a hr of 54 I try the system app ... same result)
Click to expand...
Click to collapse
On my K8 R, D5 and X5, the HR is within 10-20 of actual. Sounds like you might have a sensor issue or there's a bug in the firmware. What are your results using different firmware?
Lokifish Marz said:
On my K8 R, D5 and X5, the HR is within 10-20 of actual. Sounds like you might have a sensor issue or there's a bug in the firmware. What are your results using different firmware?
Click to expand...
Click to collapse
Oh ok, I use Imperium W812a ROM v1.2.0. Also my Docking Station has a pulse of 72 actually :silly: maybe its a sensor issue
I make some little Bugfixes:
https://mega.nz/#!rtMhUSLD!pwiwKxbeOTcqA9tpazhDPwoKNlLkMpdpH2ZfeHS109w
fisch92 said:
I make some little Bugfixes:
https://mega.nz/#!rtMhUSLD!pwiwKxbeOTcqA9tpazhDPwoKNlLkMpdpH2ZfeHS109w
Click to expand...
Click to collapse
works great thanks.
fisch92 said:
I make some little Bugfixes:
Click to expand...
Click to collapse
In this latest version, display remains continuously on and if I remove it from Recent apps display turns off but then HR does not work.
Any luck getting it to run as a background service or getting the stock app to run in the background? Here's the thought, background service + "On Wake" trigger = HR updating on faces when you rotate your wrist to check the time. I haven't had my coffee yet so this thought is less detailed than usual..
the app does'nt drain the battery that much but the reading are off, i do'nt get a reading over 100 when i workout but i wonder if because of the HR itself and not the app, can someone with x5 or k9\k8 check? thanks
Lokifish Marz said:
Any luck getting it to run as a background service or getting the stock app to run in the background? Here's the thought, background service + "On Wake" trigger = HR updating on faces when you rotate your wrist to check the time. I haven't had my coffee yet so this thought is less detailed than usual..
Click to expand...
Click to collapse
I will fix it in next version
soniasophie9697 said:
the app does'nt drain the battery that much but the reading are off, i do'nt get a reading over 100 when i workout but i wonder if because of the HR itself and not the app, can someone with x5 or k9\k8 check? thanks
Click to expand...
Click to collapse
sounds like my problem the only moment my watch shows me a HR over 100 was before my bachelor exam but when I do sport the messure is always between 50-70. But this isn't because of my app or is it? Did you get the same values with the systemapp? Or maybe the ROM thich one does you have?
I was getting 40-50BPM resting rate from the app, which would be fine if I were an 18yo triathlete vs a 40-something stay at home dad after a double espresso.
fisch92 said:
sounds like my problem the only moment my watch shows me a HR over 100 was before my bachelor exam but when I do sport the messure is always between 50-70. But this isn't because of my app or is it? Did you get the same values with the systemapp? Or maybe the ROM thich one does you have?
Click to expand...
Click to collapse
wait...does it not also for workout? when i do my running? i had problems with the HR build in before it never showed me the right results after a workout, i thought it because just on light was green and it should be two but many said that it is the same on their watch with BT chest belt i do'nt have this problem.
Sorry, but these indications HR D5 for nothing suited.
Now, I ran on the treadmill. According to the indications (sensors in the handles) was 108-110. I checked the hand artery and was about 100. And our d5 65-71. Terribly underestimates. I think I will buy a normal sensor on a belt, because this is not what to trust. They made the sensor as a gadget rather than something useful.
A mistake of 5-15 would be ok, but so it's more like an oracle do you think it's a sorftware issue or a hardware issue. Had somebody here better experience with the hardware sensor? Maybe on other devices or other firmware or in special situation?
Actually the measure of my app is quite simple. It do the measure like the engineermode app and my app calc the mean over time and throw bad measure (hr of 0) away. But actually I don't know how the measure calculates the hr of the sensor data. Maybe this is improveable
I have tested not on your application. I did the measurement on the system application D5. But it probably would still be the same sensor error.
New Version is here:
https://mega.nz/#!e5FRFAgZ!3glFDXdyZrQrKtbh22h7qHTYJ3c-AeAg0osSLlapilY
What is new:
- remove WakeLock (Screen of Watch don't turn on by each messure)
- remove always on feature (if someone is worry about this, let me know )
For Developers:
https://github.com/fisch92/SensorLib
I build a library that make the usage of the hr sensor as easy as I can
The other sensors will be added later.

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