Android :: OpenGL ES Lagging - Learn ES 1.0?
Jan 22, 2010
Why is support for OpenGL lagging so far behind with Android? I have ebooks that date OpenGL 1.0 ES back to 1997 or so. I don't understand why ~13 year old technology is what's being offered in the Android API. Could someone enlighten me? What's the best path for someone wanting to learn OpenGL ES 1.0? The ebooks I have are of course not oriented for Java/Android and most everything in them doesn't work when I try it. I can post some specific examples later but at this point I'm just wondering if I'm wasting time or if I should keep going and struggle through it. I have a tiny amount of OpenGL experience but it's with 2.0 and apparently things were very different back in the ES 1.0 world. I guess my question boils down to, is OpenGL ES 2.0 support coming to Android anytime soon? And what OpenGL ES 1.0 + Android learning resources already exist?
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Feb 25, 2009
Single Threaded OpenGL game ! (check bottom, you can download and use the helper class) Lighting disabled ! Depth Buffer disabled ! Culling enabled ! Textures disabled !
Just 176 integers (x,y values only) making 88 vertexes along with 132 index numbers making "44 triangles only"
Framerates I get is
with GL_BLENDING disabled - 145 fps approx only! enabled - 110 fps approx only!
I have the screenshot of exact code in the draw function here.. just 2 damn lines ! I have hidden only the comments.. click here to see it http://prasna991.googlepages.com/drawframe.png
variable details in the 2 lines of code =========================== ipts = 176 elements (only x and y for each vertex) totallinetriangles * 3 = 176 lineindexes = 132 elements - type "short"
Here is the screenshot of output drawing and how it will look like http://prasna991.googlepages.com/screen.png
OpenGL single threaded Initialization Helper ================================ Here is my OpenGL helper class.. makes the OpenGL initialization for newbies a cakewalk http://prasna991.googlepages.com/OpenGLHelperclass.txt
I tested by rendering on the touch event only.. frame rate drops only when u touch and drag and here I have just tested by tapping and releasing gently on the emulator and on the device
Is this the device limitations ? So graphics is actually a lot lot lot slower than on iPhone ?
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Jul 24, 2010
I would like to be able to use the OpenGL API from both Java and C (via NDK).
In Java, there is a GL object passed, which has all GL methods on it.
In C, you just talk to the native library.
In a single onDrawFrame callback (for which Java is passed a GL), can I use methods on the GL object, and also call NDK methods which access the openGL library?
In other words, is the GL object just a wrapper for the same instance of the native library?
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Dec 26, 2009
Duplicate: Question 167179: Java Tutorial
I want to learn Java because I want to program for the Android but don't know the best place to look. Where did you go.
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Nov 12, 2010
I want to buy a book about android, not just some demo samples, I want to learn real android app from the book, which book should I buy?
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Jun 25, 2010
Can anyone recommend a good Beginner Android programming book? When I was in college about 20 years ago I used to program a lot (Basic, Pascal, COBOL, Fortran). I dabbled a little bit in VisualBASIC about five years go, but it was really a hack. Now, I really have a burning desire to write some applications for my Android phone, but I really don't know anything about all the new programming technologies (OOP etc). I'm looking for a good book that will teach me modern programming using Java and the Android platform.
I've seen good books on learning Java 6 and some good books on programming Android (but they all seem to assume you know Java or C), but nothing that seems to combine the two. I'd really like to learn Java right on the Android platform to begin with if possible. I know there are a lot of resources available online but unfortunately much of the time that I will spend on this endeavor is when I won't have internet access so a good book would go a long way.
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Mar 6, 2010
I have some knowledge about Human computer interaction and some basic knowledge programming scripts (Python) that run from start to finish and automate some tasks I want to do or calculations. In the past I built interfaces in HTML with PHP behind it. I would like my python scripts to evolve from the command line and build some applications with GUIs that would allow the user to drag files and push buttons to initiate operations and check progress graphically. Since I write my scripts in Python I looked at some of the options (Tkinter, wxPython, PyQt) but I can't make a decision between them to invest my time learn one and not the other. My criteria: Has a introduction for programmers for GUI (what are the differences from a script, examples of some simple interfaces). A framework that would allow me to run my programs on the platforms I use most (Windows) but that can also run on Mac and maybe Linux, without too much modification. If not the same, similar to how you program GUI for Android and/or Nokia smartphones. I'm planning to write some programs for these platforms in the near future so I would like to carry over some of the lessons here onto those platforms, if possible. I did find this previous question but none of the answers are satisfactory. Does any of the frameworks fit these requirements better than the others or are they essentially similar and I would be happy with any of them?
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Oct 7, 2009
I want to learn mobile programming, specifically Android or iPhone programming, but not sure if it is necessary to learn J2ME before working with Android or iPhone. I know only core Java (and OOP concepts very well).
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Nov 14, 2009
I'm beginning to learn mobile programming on the Android platform. I'm up for working with any particular base SDK. I just want to hear some suggestions from the community about what types of applications I should start with to help learn more advanced interactions with the platform.There are of course the Standard Hello World, calculator, etc. But by now I am bored with all of those.What do you all make when learning a new language?
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Jul 3, 2010
I've noticed that no apps are running according to Task Killer. I do NOTHING on my phone and look at Task Killer again and see that several applications are NOW running in the background. Is there anyway of learning what is triggering them to launch ?
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Aug 16, 2010
Should I learn Java before learning Android or I can do both things in parallel? What is the best approach?
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Feb 4, 2010
Could anybody give me some suggestion about android build system? It is too difficult for read to me.
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Oct 1, 2009
I am interested in getting my feet wet in PDA/mobile development.The only two drivers for me are the drive to learn cool (or at least, new) stuff, and may be to code some app that I felt I really needed but lacked. As such, I would like to know what the comparative benefits/downsides would be for me as a developer in choosing one of the three platforms (iPhone vs Palm Pre vs. Android.I will have access to any of the 3 but not to Windows mobile).This is not a duplicate of this question, since I do not care at all about that question's data points (cost of the handheld, popularity of the platform). Also, just to be clear, my goal is not financial at all - I don't plan to make money off of such development nor directly use the skills in the area I might obtain in my career (e.g. I work on stuff that has zilch mobile exposure and will remain so). So concerns such as "installed user base" are pretty irrelevant. All I care about are tangible (learning) and intangible (sheer joy of it) benefits to me as a developer.Also, please be positive and don't put down other platforms or otherwise use this as a holy platform war excuse. I have edit privileges and will mercilessly edit any un-backed-up-by-facts attacks on any platform that aren't downvoted.
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Jul 25, 2010
I am a newbie to Android and the Eclipse development environment and would like some advice on best practices for debugging my apps when they throw a Force Close.I have researched ADB, however, I can not get this to interact with my phone even though I have explicitly turned debug mode to true on my test handset.Obviously Android comes with a LOG method which I have seen utilized in many example apps, can someone please explain how to review these logs quickly and how to setup logging appropriately to determine the cause of a Force Close (always occurs when I push the Home button).Any advice on debugging effectively in Eclipse would be much appreciated!
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Apr 28, 2010
As part of the college mini-project, I am developing a micro-blogging platform for Android. I am planning to use Django framework in python to handle the communication between Android and remote server so as to make database API independent. I heard its best practice to use HTTP methods for the communication. Which is the best site/book to learn using HTTP methods for Android?
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Jul 31, 2010
I consider myself an Android developer, after having created four apps and learned a lot by creating them. Now I've begun my venture into the iPhone app development world, and I don't remember the Android learning curve being this extreme. It doesn't help, though, that I was very familiar with Java and Eclipse whereas I hardly even know how to use OS X. I learn fast and I know exactly what I want to make, I just need the means to get there. I'm really floundering with Xcode and the new project templates (of which there are several, and I hardly know what they mean). I know there are many books and things out there for starting from scratch but I feel like my Android knowledge should count for something. Is there a good resource for learning the basics of iPhone development, given that I am quite familiar with the Android platform? I'm looking for anything that converts Android knowledge to iPhone knowledge; a table of UI element names in each platform, or of concept equivalents, or a compare/contrast of the frameworks involved, or anything that will increase the rate of learning given that I know the Android platform already.
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May 14, 2010
I try to learn java for android devices. i have to create the update function. But still have one question: How?
in class root
public void update(){maindebug("update"); // This is my debug function}
public void run(){ while(isRunning){ // isRunning is a boolean variable
SystemClock.sleep(100);
update();}}
and inside onCreate run(); but it doesnt work.
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Nov 24, 2013
I am considering rooting my phone because I like to tinker with things and learn new things, just for fun.Aside from learning new things, I would like to also install apps that require root permission like greenify... I'd also like to learn enough to remove crapware from my wife's gs3, but not until I learn how to do it with a level of confidence on my own phone.
I have a Nexus 4 right now, and a 5 on the way. I also have a 2012 nexus 7.Generally, how easy is to learn about rooting on a nexus? Good phone or tablet to start with? Easy to recover from mistakes?
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Apr 17, 2010
I got the Droid from Verizon a couple days ago, and about two days ago I rooted it, and I'm now using Bugles Beast 0.9 with a 5 slot Chevy 1.2ghz kernel. I keep the CPU set to 800 because i feel like 1200ghz is burning up the battery unnecessarily when I'm playing games. However, I can't figure out why sometimes when I'm returning to the home screen, no icons will display for about 5 seconds (usually when exiting a program that eats up a large amount of CPU). Could it have something to do with Set CPU settings?
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Oct 16, 2010
I'm gonna be honest here... When I found out that i could have GBA and SNES emulators on my android, I made up my mind. I tryed it out a bit on my friend's Motorola Flipout and was working just perfectly. However, on my own Flipout, the games are all "laggy". Not to mention the music which plays one note every 1 second or so... bummer. I know it's not the ROM, for i have tested with the same one my friend used... so I'm guessing it's a setting in either the phone or the emulator. Any adeas? ps: I'm using the free versions of the gameboid and snesoid
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Oct 20, 2012
I have Galaxy W but I noticed that the games have a little lag. That normal maybe because my phone is not dual core. But I have read that lot of people are complaining about lagging in games even if they have a phone with good specifications like Galaxy S2 & S3. I understood that this is from bad optimization for Android, cause the games are direct port from iOS.
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Oct 2, 2009
I've got an App Widget that gets updated (er... I try to update it) with the following chunk of code: ComponentName thisWidget = new ComponentName(context, MyAppWidgetProvider.class); AppWidgetManager manager = AppWidgetManager.getInstance(context); manager.updateAppWidget(thisWidget, remoteViews);
The problem I'm seeing is that it the user interface is updating always one behind (i.e. using the previous remoteView to update the user interface). So, i make that call with a certain configuration in remoteViews, and it doesn't reflect in the UI until the next time I call it with a different remoteView. I know this is kinda vague and I don't have a lot of details here, but i was wondering if I'm missing something very obvious.
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Sep 25, 2013
Im just asking why is my messaging app lagging like hell when my messages exceeds to like 150+ messages, I mean its kinda awkward since this phone has a quadcore processor and a 512ram. Is this some glitch on the os or just the dual sim or dual text to sim 1 or sim 2 making it lag so bad?
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Nov 4, 2010
I used to get gmail email notifications instantly when they arrive now I get them only with 1-2 hours delay. Basically I get the notification of a new email faster than the browser version on my pc refreshes (dunno how often it does it maybe once every 10-20 secs). This has been going on for 2 days now. I will get the notification eventually of a new email if I don't mark them as read but just before it was within seconds now it's within hours of the new email arriving. The problem is gmail gets into sync loop I'm assuming this is a gmail problem.
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Nov 24, 2010
I am getting out of time for the android app. I am not a lazy guy but I got indulged in some urgent problems. I am a recent computer science student and have intermediate knowledge of java. However I am good at PHP. Way to learn Android and start developing apps immediately.
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Jan 27, 2012
I have recently flashed my htc desire hd with Android revolution Hd 6.3.1 custom ROM, here is the link [URL] .....
Everything is woking great since i have flashed it, except for the video part. Before flashing my phone could play vvideos of of any size say 200 0r 400 mb without lagging. But after the flashing the same videos do not play. i have tried almost all the known players, i have also formatted my sd card. other than that the Rom seems to have no problem.
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Dec 6, 2009
Is the hero still fairly laggy or not? I'd like to know since this is basically the final point between choosing between this and some jailbroken iphone.
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Jun 27, 2010
My incredible all of a sudden started lagging really bad while texting. I am using the HTC keyboard and have tried others and they all seem to lag. I restarted the phone and no change. Listed below are the apps i have installed on my phone. What could be causing this? It just started today. I also have cleared cache in most apps on the phone.
advanced task manager
androzip
apexuninstaller
audio manager
barcode scanner
better cut
engadget
facebook
launcher pro
linda manager
mabilo ringtones
movies
sirius app
shazam
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Nov 18, 2010
I'm confused why is my activity still lagging, I use remote service that has few methods and each has its own work like download stuff, process data, compare stuff, etc... It will run in background and update data at selected intervals and notify user of changes over notify system.
The reason why remote service, because I will eventually add a widget, and service needs to stay running even if android kills the activity, so I unbind it on each onPause().
But as far I understand that part doesn't cause my issue.
But back to my problem... so my is Activity still lagging when I run stuff in service and handler.post method.
here is the code...
Also I wanted to add progressDialog to be updated in updateLayer(...) through Activity is a listener to this service, but thats not working well. Whats the best way to update progressDialog? Ever listener, handler, intent, or what?
So how do I do this correctly?
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Jul 22, 2010
Most all the time i find the Evo lagging and check the processes with Astro's Process Manager. i see i have usually around 45mb. i free up things i am not using but usually these things are not ones that i have opened. Sprint TV, news, etc. when i free up, i see i have about 105-120mb free.. then the speeds pic up a bit. normal? of course, more memory it will increase phone speeds i know. but why is it so low?
whats everyone elses free memory look like?
I am a new Android guy. have had an iphone for the past 3 years.. the switch is nice and finally getting away from the culture of apple people. but this phone seems to lag a lot unless i constantly kill process's.. any tips for me?
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