Android :: Speed Up Android Emulation
Dec 17, 2009
I'm trying to get started with Android development.
I'm using eclipse on Linux and using a Pentium IV @3.2Gh with 1GB of ram.
I've just followed the "hello android" howto, with just one sad result: the virtualization is too slow.
It seems that launching the virtual machine has to be slow, and it will be slow even if I'll use a better computer.
With slow I mean it takes almost 10 minutes to see "hello android" and if I change it to "hello world" it takes an other 10 minutes...
How can I solve it? Is it possible to make eclipse load again my app in the current and running virtual machine without opening a new one?
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Feb 22, 2010
I'm trying out the network speed emulation as described in the following link: http://developer.android.com/guide/developing/tools/emulator.html#net...
But is doesn't work, although "network status" command shows the correct values... I know it doesn't work by writing code to monitor the eth0 device in /proc/self/dev/dev, whatever speed I set, it seems always use maximum speed available to the host machine.
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Apr 28, 2009
I am currently trying to simulate GPS fixs with android emulator, but I encountered some problems. I can run the app, clic on the send button in the emulator control, but, only the first click provides a position. I am running an ubuntu jaunty, eclipse and SDK 1.5, on a french system with the locale EN_US
Here is my code :...........
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Aug 19, 2009
I'm developing a new game and have been having inconsistencies between the device and emulator. The biggest one for me right now is that the elements I draw with an orthographic projection work correctly on the device, but are 1/2 the size on the emulator. I've checked and rechecked the code 100 times and I'm positive I've done it right but am confused as to why I'm seeing that result. I suppose I could go forward doing ALL testing on a device - and I may have to, seeing that the emulator's frame rate is horribly slow - but I was hoping that I could do some of the work on it at least.
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Aug 17, 2010
Anybody know if there is anyway of having multiplayer games on android emulators? i have seen that it is possible on the pc emulators... surely is do-able on android?
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May 26, 2010
Just found out that there's a working PSX emulator for the HTC HD2:
http://www.youtube.com/watch?v=raLRAP9KuPk
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Sep 11, 2010
For years now I've maintained a Tandy Color Computer Emulator applet on my home page. With the purchase of an Incredible I decided to do a port. Getting it going in Android didn't take long but I'm really surprised how slow it runs. You can literally see the pixels painting. I know there are other successful Android emulators so I must be doing something wrong.
My approach was to use a SurfaceView for rendering. There's a separate thread that runs a virtual 6809 CPU. Whenever that thread updates the emulated video memory, it calls SurfaceHolder.lockCanvas() with a Rect describing the part of the screen requiring a repaint. Then it calls the gfx routines with the resulting Canvas...this is where I did a repaint() in AWT/Swing. The gfx routines are smart enough to just render what's in the clipRect. Perhaps I'm still stuck in AWT but I can't think of any way to make this thing run at an acceptable speed. I tried to coalesce the gfx calls but that didn't work either. Any thoughts?
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Jun 4, 2010
I just finished what I hope is the ultimate guide to emulation on Android. I've basically fine-combed the Market and done my best to map out what the Android platform currently has to offer when it comes to retro video game console and home computer emulation. Various Nintendo consoles are covered, of course, as well as Sega, C64, Amiga, ZX Spectrum, TurboGrafx-16 et cetera.
The only emulators I've ignored are those with an average rating below 3. Now to my question: did I miss any good emulators? There might be emulator projects for Android on the web that are not available on the Market? Such as ScummVM, for example, although technically it might not qualify as an emulator. Is there a PlayStation emulator for Android?
Here's the link to the guide if you want to check it out:
The Definitive Guide to Emulation on Android: Play Nintendo, Sega, C64, Amiga and More
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Feb 1, 2010
Please could anyone tell how to best set up an emulation of the Motorola Droid within Eclipse?
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Jul 6, 2010
What's it like on the SGS? I have an iPhone 3g now and have had an iPhone for 29months, getting a bit old. I'm just playing around with GBA Emulation on it now and really like the idea. I guess the screen on the SGS would be an advantage, it's this or an iPhone 4. Advantage being I can get an iPhone 4 for a 12mo contract, and make a profit over that contract compared to what I'm paying now, even with the cost of the handset. But the SGS seems like a superb phone and I'm a bit bored of iOS. Is there anyway to revert the SGS to stock android? So you could just update to Froyo whenever? What are the really cool things about the phone?
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Nov 12, 2010
So it's that wonderul time again for me to renew my tmobile service and get a new phone, and i've narrowed it down to the mytouch slide and the samsung vibrant. Now I just want to get some opinions on which you all think would be better for emulation. The issues I see are:
The vibrant doesn't have a physical keyboard which is much more preferrable than touch controls. On the other hand, it has a really large screen which might make touch controls more usable (i've only played emulators on an iphone 3g)
The mytouch DOES have a keyboard, but has a significantly slower processor (on paper), and therefore might not run emulators as well.
What do you guys think? Anyone with emulator experience on either phone? Is the vibrant touch screen good for controls? If not, is the mytouch powerful enough run emulators as well as the vibrant?
Just as a side note, in all other areas I like the vibrant better, so if the mytouch is overall better for emulation, but only by a small margin, i'll go with the vibrant.
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Nov 13, 2008
There has been discussion on other boards, but emulators and game ports may take a while and depend on if Android is opened for some native code access. The author of my favorite WM emulator, Smartgear (great multi system emu for NES, GBC and Turbografx and Sega) has told me that the "Java" layer is required, so not only do you have to emulate the game systems, you have to also interpret the "Java" layer and this results in slow emulation even on the G1. He wants to release a port of his emu to Android, but says it will not happen until Android has native code access. Coreplayer is another program that is having issues due to Java on Android. They want to port the their media app but state that there is currently too much cpu overhead because any codec not native to the OS ALSO has to go through the "Java" layer. If all things stay constant, this does not mean there will not be emulators, but it does likely mean that even a Gamboy emu will be slow on the G1 or any other Android device. I put quotes around Java, because the container in the OS is more a hybrid of Java, but the cpu overhead is still the same. We will probably not see Doom, Quake, MAME or any full speed emulator with sound until Google opens the OS up to some native code access. Google demoed Quake, but it apparently did not go through the Java layer restriction. I would like to know if they used the SDK or used code native to the cpu. I tend to believe others that the OS will be opened up more by Google, but how long will this take?
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Oct 9, 2012
Ive been learning to build roms and ive created a few of my own but im tired of taking up so much space on my phone and flashing multiple roms. I want to know if there is an Android ROM Emulator that i can run on windows 7 to test the rom before i flash it,
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Jun 2, 2010
There should hopefully be a working version out soon that will carry on working when my Desire gets the 2.2 update in the next couple of months. There's not loads of games out yet for ScummVM, but one in particular I'm really looking forward to is Full Throttle. A really cool game at the time and to be able to play on my Desire will be totally awesome. Any one else looking forward to ScummVM? or if you know of any other Android Emulation projects?
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Dec 11, 2009
As I am new to the Droid world are these apps the way to go for good emulation on the Droid? is the developer coming out with regular updates for these as needed and such?
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May 2, 2013
My phone has alot of build in memory, so it emulates an SD card. But that runs out of space fast.
I have an SD card in it now, but it's mounted as sdcard2.
Can I disable the emulated SD card and make it goto the real sd card?
I can't move apps to the sd card because the sd card is emulated. Programs like link2sd don't give me the option to choose where I want to install to. It just chooses /mnt/sd card, which is the emulated card, not /mnt/sdcard2, which is the real one.
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Mar 14, 2013
I use a bluetooth keyboard to type papers on, and was wondering if it's possible to use it in say SNES9x+ES or Mupen64AE or emulators in general? I'm currently waiting on a replacement keyboard from Sony so I can't test my emulators with it, if they can be used for emulators.
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Jul 21, 2009
I have a static background image, and a foreground that needs to be animated. I tried a couple different approaches but the animation seemed choppy. One thing I did was having 2 different views, constantly calling invalidate() on the foreground view. Another was to have only 1 surfaceview, redrawing the background image and the foreground on each step of the animation.
While a surfaceview offers an optimal way to do heavy-duty animation, having to redraw the background every time kills the performance. Neither produced a smooth animation. What is the best way to perform this kind of animation - static background and animated foreground?
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Jun 5, 2010
Is there a way of getting the speed at which the device is running?
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Oct 6, 2010
Maybe I missed it, but when I am using the google maps app, I don't see any indication of the speed I'm making over the ground. Am I just missing this or, if not, is there a GPS app that shows speed over the ground while using the GPS?
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Nov 27, 2009
I have a DROID eris HTC and there are only 9 speed dials. My antique LG would let me use any number for a speed dial even if it was two digits. It came in handy as each person was assigned his or her birthdate. Now with my high tech phone I only have 9? Please tell me there's a way. There must be seeing as 86 is speed dial.
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Sep 26, 2010
so I've been waiting for 4G in minnesota for a while now for my epic. They haven't announced it yet but. They've been. Tinkering with the towers lately and I've been seeing sme 4G coverage here are my mobile speed test results I was surprised considering I've been reading about people saying its more like 3 and a half G with speeds not much greater than 3G I realize however that right now there's almost 0 congestion and bandwith will slow considerably however the froyo update should even that out So what are your speeds?
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Aug 27, 2009
I have just started with development and would like to ask if Android's QEMU emulator uses any type of hardware acceleration.I made a simple Android program that extends the WebView activity and loads a webpage at start.That's all it does.It takes 35 seconds to cold start the emulator and acitivity from the Eclipse IDE. It takes 12 seconds to reload the acitivity when emulator is already up & running.Do you think these numbers are normal? Is there any possibility to speed up the emulation speed of QEMU?I can try to answer to this question myself. In the past, I used QEMU with KQEMU kernel module that remarkably boosted the emulation speed on X86 hardware. But Android runs on ARM CPU (not Intel or AMD CPU), so KQEMU module cannot be used here.My PC is Intel Core 2 Duo E6850 3.00GHz. 4GB RAM. Running Eclipse IDE 3.5 (Galileo) on 64 bit Ubuntu Linux 9.04.
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Jul 21, 2010
I have 40 MB file in server and i am downloading my file using
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
FileOutputStream f = new FileOutputStream(new File("trips.xml"));
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ( (len1 = in.read(buffer)) != -1 ) {
f.write(buffer,0, len1);
this code seems working fine but it is taking too long. is their any way I can make this process faster.
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Oct 13, 2009
Is there a way to determine connection speed? E.g. EDGE, 3G, etc.? I already know NetworkInfo.getType() will tell me Wifi or Mobile. I'm looking at Is this NetworkInfo.getSubtypeName(), but the function is undocumented.
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Mar 30, 2009
Currently, attempting to scroll when the text view has large amount of text makes the app completely unresponsive. It doesn't ANR, but it doesn't respond either. I've tried occasionally removing some text from the text view and removing some spans also, but it doesn't seem to help much. Any idea how to improve scrolling? It takes ages to scroll up or down. I also tried throttling touch events but it hasn't helped either.
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Apr 24, 2009
Get scroll speed of Listview, Ivan Soto Fernandez Web Developer
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Apr 20, 2010
Apparently auto focus in a phone camera isn't all it's hyped up to be. To get faster performance (the time from pressing the shutter button to the picture being taken is usually slowed down by the camera trying to find focus in autofocus mode (and sometimes missing completely and giving up if the subject is dark or lack contrast). I'm not sure about all Android phones, but my Acer Liquid has a focus setting either 'infinity' or 'auto'. From what what I understand about photography, on a small lens such as on a camera phone, the DOF (Depth of Field) is very large, and when the focus is set to the hyperfocal length (the 'infinity' setting), everything from infinity to about 2.5 ft is in focus. I confirmed this with my phone (set focus to infinity, see what the closest thing that's in focus). So what this really means is for almost all regular picture-taking, it should be set to 'infinity' for faster performance, and only set to 'auto' when one needs to take pictures of objects closer than about 2.5 ft, like a 'macro' mode. So it would've actually made more sense if Android Camera app were to label the two settings '0-2.5 ft auto focus' and 2.5-infinity fixed focus'. If your camera has this setting, give it a try and see if it's snappier.
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May 12, 2010
Is there an app that i can download that shows my processor speed? I have seen them on phones that have been rooted and overclocked, but never seen one for stock.I am on a Motorola Droid running stock 2.1-update 1. I dont want to hear "just root and overclock." If anyone knows of an app or tool that will show this.
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Sep 29, 2010
HTC G2 appearance wise look like the Nexus 2, but hardware it's a different beast. i just saw this HSPA+ result from android central and i cant believe. T-mobile might have the worst coverage, but where i live, it's pretty damage good and comparable to Sprint 4G. But seeing this, it totally blew my mind away. Is it possible??
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