Android : Latency On Mobile Networks / GPRS - 3G?

Jul 8, 2009

I am planning to give mobile phone development a shot and was thinking about making some simple multiplayer games. I know latency over local wifi is probably fine but what are the issues with latency over GPRS/3G?

I've searched and the best I've seen is someone saying it was 'high', without presenting any concrete numbers. I suppose latency fluctuations are important as well - does anyone have any info on this?

Android : Latency on mobile networks / GPRS - 3G?


HTC Hero :: Need An App For Mobile Networks

Jun 27, 2010

I'm wondering if there is an app out there that i can use to set time for the mobile network to be on and off. I.E i want it turned off while i sleep and on during the day, i know i can do it manually but i keep forgetting and using up more of my allocation that i need to.

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HTC Desire :: No Mobile Internet - GPRS Service Disconnected

Jul 31, 2010

I'm using opendesire 3.02 on o2 and I am having trouble connecting to the internet. I've tried many different APN settings, reflashed the rom (+ Radio) with full wipes and even over a few versions of opendesire still had no mobile internet. After typing *#*#4636#*#* it says GPRS Service: disconnected. Anyone no what type of preferred network I should use?

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HTC Hero :: Unable To Receive SMS From Other Mobile Networks

Nov 13, 2009

So I just got the HTC Hero for sprint and I love the phone. However I am not receiving any texts from anyone that is not on the sprint network.

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General :: Mobile Networks - Setting Goes Automatically In GSM Only?

Apr 25, 2014

I have a problem with my android tablett, with sim card slot.In the mobile network settin, we can find this :

GSM/WCDMA (auto connect) - automatically switches between 2G/3G modes. When signal strength is low, 3G is favored more

GSM only - 2G only mode. When 2G signal strength is low, you get no data.

WCDMA only - 3G only mode. When 3G signal strength is low, you get no data.

But in my case, i can't switch to " GSM/WCDMA " or " WCDMA only ", it still changing in gsm only, when i change to " GSM/WCDMA " or " WCDMA only ", the setting goes automaticly in " GSM only ".

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Motorola Droid :: Mobile Networks Status Disabled Always

Jan 26, 2010

I have the following problem with my Milestone (~Droid): the mobile network status is always disabled no matter what I do! I have tried to switch the WI-FI network off, and I have tried to apply the airplane mode (as suggested here: Mobile Network Disabled?? - Droid Forum - Verizon Droid & the Motorola Droid Forum). Nothing helps. Actually, I have never seen the mobile network (3G/H) working on my Milestone since I got it.

I have a SIM card of my local operator, and that same SIM card is working fine on my HTC Hero. So there I can use 3G/H normally. It is also sad that there is no manual switch (I mean an option) in Droid/Milestone to switch the mobile network on/off manually just like in HTC Hero.

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HTC Desire : T-mobile / Access Both Networks Enabling To Make Calls - Send Texts

Sep 6, 2010

Just wanted to refresh for those that arent aware of this coming merger.

"from 5th October, 30 million customers the combined customer base of Orange and T-Mobile in the UK - will be offered the opportunity to access both networks, enabling them to make calls and send texts in more places in the UK for no extra cost."

This is great news from those suffering from sub-par reception, and im pretty sure will obliterate the competition in terms of available phone signal.

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Android :: Syncronizing Mobile Phone Contacts With Contacts From Social Networks

Apr 28, 2010

I retrieve a JSON list of contacts from a social network site. It contains firstname, lastname, displayname, data1, data2, etc...

What is the efficient way to quickly lookup my local phone contacts database and "match" them based on their name. Since there are firstname, lastname and displayname this can vary.
What do you think, how can the best match be achieved?

Also how do I make sure I don't parse for each JSON item the whole database I want to avoide having JSON_COUNT x MOBILE COUNT steps

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Android :: Low Latency Audio Api?

Sep 19, 2009

What are my options for playing simultaneous audio on an Android device with the least amount of latency? Am I going to get anything half decent out of the canned SDK, or is that asking too much? The documentation claims that the SoundPool class is capable of playing multiple sounds simultaneously with relatively good performance, but after running some tests in the emulator and on a physical device it seems pretty weak. Is there maybe a trick to it, or do I have to go to a much lower level api for this kind of thing? I've tried using a single sound pool with multiple samples loaded, and I've tried multiple sound pools each managing a single sample. I'm preloading everything, so that when I attempt to play back I have no additional code being executed other than the call to SoundPool.play().

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Android :: Latency When Getting Sensor Data From Phone?

Mar 9, 2010

I am working on a project using HTC magic which requires the data from the electronic compass, including both the accelerometer and magnetic sensor. But I find that there is a significant latency between the move of the phone and the trigger of the sensorChanged event. In other word, the acceleration and magnetic data obtained from sensor are updated about half of a second after my motion. And I have several questions about the problem as follow. Are the orientation data computed by the acceleration and magnetic data? Or are there a physical sensor for orientation? Does the latency result from the android API (using the event) or the physical limitation of the electronic compass? It is said that the model of the electronic compass is AK8976A from Asahi Kasei. Does anybody have the datasheet or know the frequency of the sampling? Any idea to improve the real-time experience?

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Android : Live Stream Latency - Delays In VLC

Apr 13, 2010

We are developing an Android video conferencing application. After examining some already existing live-stream applications , we came to the conclusion that all or almost all existing applications have a delay of 3 to 10 seconds. The application we are developing was tested receiving a video stream on the Android device and the same video stream on VLC at the same time.The result of the test is that VLC shows the same part of the video 2 to 10 seconds earlier than our Android application on the phone(HTC hero) depending on the rtsp link used. we haven't found what is the main cause of the delay and also dont know if it is possible to reduce that delay. In our case, as it comes to video conferencing, the delay should be lower than 2 seconds at least. Do you guys have some information about the cause of the delay or even how to reduce it?

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Android : Latency Due To Garbage Collection On On PrevFrame

Jun 6, 2010

I'm writing an Augmented Reality codes that should works in realtime,

But the VM's garbage collection hinders my program's performance.

I checked my program's execution time for each in OnPrevFrame(byte[], Camera)

and it execution time increases from around 50ms to 120ms at just after each garbage collection.

I copied parts of logs below. (local time is just before and after of signal processing, and global time is time stamps for every onPreviewFrame() calling )Also I executed onPreviewFrame without any signal processing on it, but

the garbage collection is also carried showing debugging message around 60ms it spends for memory release.

Is this garbage collection come from releasing byte[] yuvs image data? ( i uses 320x240 thumb nail )

then this clearly comes from Java's limitation, so there will be no hope for improvement unless

I found a way to directly access camera device? do you think this is feasible? Hope listen to others' comments.

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Android :: Difficulty Of Making Low Latency Audio Apps In Phone?

Apr 12, 2010

Despite everything I have read about the difficulty of making low latency audio apps in Android, I am giving it a shot. To start, I loaded each note in an octave into a SoundPool, and then looped through each note that was to be played on that beat and called play(). This didn't even come close to being accurate enough for me, and got especially bad if a lot of notes were being played at once.

From what I read, the only way to do something like this is to mix the audio yourself, though I am not entirely sure how to go about this. My initial thought is that for each beat, I could precompute the sound the sound that is to be played (i.e., combine the wav's), and then pass that stream to an AudioTrack when it is time to be played.

Are there any good examples out there for how to mix audio like this, or libraries I could use to do this for me? How have coders of other music apps dealt with this?

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Android :: Low Level Audio - Latency In SoundPool - AudioTrack For Real Time

Oct 26, 2009

I first have to say that I'm biased, 'cus I like to write music apps (like music generation apps). However, this affects games as well. It's somewhat disappointing how OpenGL has made it into the NDK now but there isn't any NDK methods to get to sound to have faster access. Over the weekend I did some more testing and if you make a "drum" app, for example, and play the sound using either SoundPool or AudioTrack, you will get about a 100ms delay buffer, which is clearly audible (gap).

I made a test app where when you touch the screen, upon the DOWN event, it would play a short sound (like a drum sound). It clearly was not real time responsive or even close - you could hear the delay. I'd be interested to know if anyone who has made a game has any trouble with sounds? It seems like they aren't going to really trigger real time enough if you use SoundPool, for example. Am I completely wrong? Seems like your game is going to perform an action, play a sound, but the sound will have latency which I would think would throw off the game a bit..................

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Android :: 3434 (audio Latency) - Music Applike NanoStudio For IPhone

Sep 29, 2010

This might not be a big deal to most but today, I went to the Android market looking for a music app, something like NanoStudio for iPhone. I found a lot of 2nd rate loop creation synth nonsense. After trying different free versions of paid software I asked myself "why are there no good music apps for Android?"

I emailed the creators of NanoStudio to ask if there are any plans to release an Android version of their software. here is the reply: "Not until they get their act together with audio latency, no. Shame really because NanoStudio's written to be cross platform" This greatly disappointed me. I am a music producer going on 10 years (hip hop, Trip hop, Electronic, etc..) so you can understand my interest in this issue. iphone, iPod have amazing music apps of this sort. Android has nothing close.

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Samsung Vibrant :: Audio Latency (3434)

Oct 10, 2010

If the Mods decide to delete this and direct you to the OP then thats fine. I just want to spread awareness if this issue. This might not be a big deal to most but I went to the Android market looking for a music app, something like NanoStudio for iPhone. I found a lot of 2nd rate loop creation synth nonsense. After trying different free versions of paid software I asked myself "why are there no good music apps for Android?"

I emailed the creators of NanoStudio to ask if there are any plans to release an Android version of their software. here is the reply: "Not until they get their act together with audio latency, no. Shame really because NanoStudio's written to be cross platform" This greatly disappointed me. I am a music producer going on 10 years (hip hop, Trip hop, Electronic, etc..) so you can understand my interest in this issue. iphone, iPod have amazing music apps of this sort. Android has nothing close.

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Android :: G1 Constantly Using 3G Or GPRS

Oct 19, 2009

Recently my g1 has started using 3G or GPRS almost constantly, like its auto checking e-mails or somthing.If i disable the 3G option it uses GPRS insted.I have reset the g1 to factory defauts, only APNdroid and ToggleWIFI installed, but it still keeps doing it.(APNdroid was installed so i could turn off ALL 3G/EDGE/GPRS connections)This is slowing down my connection when i do use GPRS/3G/EDGE.Why is this happening ??? and how can i stop it, without using APNdroid?This is a T-Mobile G1, using firmware version 1.5, build number CRC37

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Android : O2 GPRS - EDGE - G3 And H

Jun 14, 2010

I have recently upgraded to the HTC DESIRE on o2, So far all I have seen is the "G" = GPRS, so far I have not seen 3G, E, or the HDPSA or what ever it is :-). Does o2 support anything else but "G" on this handset etc etc, or is my phone faulty ? I live in the UK and so far today I cant even use my internet - O2 have said there are having issues with 3G but didnt say where in the UK or maybe this is Nation Wide ?

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Android : Get The Location Value From GPS And GPRS

Nov 14, 2010

I'm a android application developer novice.

I'm try to get latitude and longitude value via android.Location class, but sometime my system can't to get The correct value is lat: 0.00 and lng: 0.00, Perhaps It's return incorrect value because Android detect by GPS only.

Now, I know that location value can detect by GPRS/WIFI, and how do I get It ?

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Android :: How To Get Connectivity On Gprs / Edge?

Jun 29, 2010

I am currently in China and therefor run a VPN on my PC to connect to the outside world, I would also like to run the same VPN (PPTP) on my android. I can connect via VPN if I am using WiFi but when I try to connect over GPRS/Edge I can't get any connectivity. All web pages load with the standard "web page not available" and apps, eg. the market place, won't connect either. I would have thought that if it was a carrier issue (CMCC) I wouldn't be able to connect to the VPN in the first place. So is this a Android issue, a setup issue or a carrier issue? And can you actuality run a VPN over GPRS om Android?

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Android :: Want To Turn On Gprs / Edge Via Sms

Dec 16, 2009

Is there any app or some thing like that, that I could use it to turn on mobile Internet 2G (EDGE/GPRS) or 3G (UMTS/HSDPA). I now turn off/on mobile Internet with Toggle Data widget, that changes APN type to "-" so it can't work. I am asking this because i use GPS tracker app. And I can turn it on with sms with code: "gps_tracker_start But if i want to report my location I need to be connected to Internet. So I could see my android phone even if it is not connected to internee. So is there any option to turn on mobile Internet remotely?

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Android : Auto 3G - Gprs - Access

Apr 30, 2010

I just got an x10(android 1.6) , it seems like d phone can automatically access network/gprs whenever it feels like, this may cause a huge bill on me n also drain all battery power within d day, unlike older phone(not that old), gprs will be in use when needed n shutdown when not needed.

The only way to stop all this auto 3G downloading/uploading is to manually disable all the mms feature in the mobile networks or kill all task(kill task appilcation). And if i wanted to use those gprs, again i have to manually turn on all these setting, whereby traditional handphone need not do all these , which i find it more convinient unless subscriber has all the free DATA given.

Hopefully the os/software can be upgraded better to understand a user needs whenever needed and not automatically downloaded data as if noone bizness.

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Android : Apps Not Working Over Gprs

Apr 20, 2010

I just bought a new HTC Hero and I own a Vodafone card with gprs enabled...Although the browser works fine over gprs none of the apps seem to work...The apps work fine over WiFi...

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Android :: Way To Control Access To Both Wifi / 3G GPRS?

Mar 5, 2010

I was wondering does anyone know if its possible to open a wifi and a 3g connection at the same time on Android? Is there any way to control access to both Wifi and 3g/GPRS data connections and use them at the same time?

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Android :: Connecting To Internet With Pc From HTC Phone (gprs)

Jun 19, 2010

I have a HTC hero with modoco 2.1 Rom What I do that connecting to Internet With pc from HTC phone (gprs).

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Android : Application That Monitors The GPRS Connection

Dec 28, 2009

Is there an application that I am able to see which application is utilising the GPRS connection, because it seems that there's an app doing it whilst it is closed or I haven't turnt off the auto update, any app that can tell me what app is using it?

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General :: Android 4.0.4 - GPRS Not Working On Any Network

Aug 16, 2013

I own an android dual sim phone running on Android 4.0.4

My GPRS was working fine but I dont use it alot since I have WiFi. Now after sometime I wish to use GPRS but its not working.

I have tried to reset the Access Point Settings and ensured that the settings are correct by matching them with a frd's phone. Everything looks fine but the GPRS is not working. What to do?

I have tested it on two different networks to see if the issue is at my network's end but the GPRS didn't work on both.

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Android :: Boasts Certain Features Like Communication Via GPRS Service

Nov 12, 2010

I am a junior software developer working mostly in c#. I am being tested at work by my boss for a new role as an android sdk developer. I passed the first interview and now he wants me to write a small application which boasts certain simple features such as communication via GPRS service and handling data (i guess he means use a sqlite table to store some input). Anyone got any simple ideas you can throw at me to give me a good starting point.

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Android :: Application Works Over WiFi But Fails Over GPRS

Aug 17, 2010

I am developing a social Networking application and it works fine over WiFi but tried the same over GPRS it gives following Exception,

.....................

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Android :: Receive Images From Server Through GPRS And Display?

Oct 6, 2010

I need an android application that needs to receive images from a server through GPRS(by http connection) and display it. am having the url of the server

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