Android :: How A JIT Compiler Helps Performance Of Applications?

May 13, 2010

I just read that Android has a 450% performance improvement because it added a JIT compiler, I know what JIT is, but I don't really understand why is it faster than normal compiled code? or what's the difference with the older approach from the Android platform (the Java like run compiled bytecode).

Android :: How a JIT compiler helps performance of applications?


Sprint HTC Hero :: App That Helps To Get Better Signal?

Dec 15, 2009

Is there an app that allows you to use other networks, towers, etc. to get better signal on the hero.

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Android :: How Does Emulator Performance Compare To Real Device Performance?

May 23, 2010

I'm looking into writing an Android game, tough I don't curerntly own an Android device. For those of you who own a device, how does the performance on the emulator relate to real device performance? I'm especially interested in graphics related tasks.This obviously depends on both the machine running the emulator, and the specific device in question, but I'm talking rough numbers here.This question is a duplicate, but since that post is heavily outdated, I figured it's irrelevant by now.

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Motorola CLIQ : Moto Update New - Improved Performance - Battery Life - Software Performance And Stability

Feb 20, 2010

Motorola CLIQ Over-the-Air Update
[Retail Partner Sales - T-Mobile Employees and Authorized Dealers]

February 19 Update
The over-the-air update for the Motorola CLIQ has been delayed to the week of February 22. An updated article will be available once a date has been determined.

On February 18, Motorola will begin sending over-the-air (OTA) software updates to Motorola CLIQ customers. The software update will improve device performance and resolve several known issues.
Improved Performance:
Improved battery life
Improved software performance and stability
Improved widget response
Decreased Force Close error messages
New Manage SIM Card application
Support of .WMA and .WAV media files
Removal of the imeem mobile application
Known Issues Resolved:
Accessories & Bluetooth
Error: 'Unable to pair' or 'Unable to connect to device'
Call functions
Can activate other functions while listening to visual voicemail
Call not ended by pressing the End key
Speakerphone turns on unexpectedly when answer incoming call
Plays ringtone or vibrates while on an active call
Unable to answer incoming call using �Slide to answer� feature
Accidentally opens Dialer or makes outbound while holding device
Device hardware (battery, keys, power, screen)
Battery indicator may not display accurate battery power
Call not eded by pressing the End key
Touch screen issues
Cannot answer incoming call using the Slide to answer feature
Incorrect keys registered using on-screen keyboard
Touch display appears to have �dead spots� that are unresponsive
Accidentally selects item when trying to flick through screens or menus
Messaging
Wrong message deleted
Phone may reset when turning Wi-Fi off in area with no Wi-Fi coverage
Customers can manually download the OTA on demand by going to Settings > About Phone > System Updates. Customers do not need to wait for a notification message to download.
Action Steps
Be aware of the fixes and enhancements included in the Motorola CLIQ update.
If customers are experiencing any Known Issue that will be resolved by the software update:
Do not file a handset exchange
Advise customers that the issue will be resolved by a software update on February 18.
Important Rebate Changes
[Retail Partner Sales - T-Mobile Employees and Authorized Dealers]
Customers eligible for rebates as part of new activations or upgrades must be advised they will receive their rebates in the form of a prepaid Visa card.
When customers take advantage of our new Early Upgrade or Early Upgrade Plus options, they are not eligible for upgrade rebate cards. These new upgrade options allow customers to take advantage of upgrades sooner and provide an instant discount, instead of having to wait for rebate cards.
To be eligible for an upgrade rebate card, customers must meet upgrade eligibility requirements.
Current, 1-year contracts: 11 or more active months since last discounted handset purchase.
Current, 2-year contracts: 22 or more active months since last discounted handset purchase.
Rebates on eligible purchases require contract extensions and a $9.99 or higher Data/Messaging feature.
Valid only on FlexPay plans with 1 or 2-year contracts.
Not valid for Even More Plus plans.
Active Months: The number of months in which the account has been in good standing and during which service has not been suspended.
Action Steps
Inform customers that Early Upgrade and Early Upgrade Plus are not eligible for upgrade rebate cards.
Advise customers eligible for rebates that they will receive their rebates in the form of a prepaid Visa card.
"With the purchase of your new handset, you can submit a rebate form to receive your rebate. The rebate will be in the form of a prepaid Visa card that can be used anywhere Visa is accepted. See the rebate form for additional details."
Trackball Replacement Program
[Retail Partner Sales - T-Mobile Employees and Authorized Dealers]
On February 24, T-Mobile will launch a Trackball Replacement program for BlackBerry Pearl 8100/8120 and BlackBerry Curve 8320 customers that are having trackball issues. This program will be available in T-Mobile retail stores only at this time.
Action Step
Refer customers to a T-Mobile retail store after February 24 for further assistance if they come in to your location looking to complete a trackball replacement.
First Connect for Dealers
[Retail Partner Sales]
First Connect for Dealers is an exciting class designed to help on-board and prepare Retail Partners to successfully sell T-Mobile products and services and provide differentiated customer experiences. This four hour class is conducted via the T-Mobile Live Virtual Classroom and covers the following:
Welcome to T-Mobile
Who is T-Mobile?
PCC
Differentiated Handsets
Differentiated Rate Plans
Service Excellence / Selling Skills
Tools and Resources
Customer On-Boarding
The attached flyer contains dates and times for these calls as well as registration details. ADRs should educate their locations about these calls and encourage them to attend.
To successfully be able to attend the training sessions, Retail Partners should have the following:
Computers with high speed Internet connections
The ability to play and hear video segments on the computer using speakers or headset
The use of a fully charged mobile phone to hear the audio portion of the conference call
Printer access to print Participant Workbook.
Action Steps
Share the attached flyer with your locations and encourage them to attend one of the scheduled calls.

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Android :: JIT Compiler Explanation

May 3, 2010

Is anyone able to explain to me exactly what the upcoming JIT compiler will provide? For example, I have Java programs that generate bytecode at runtime which I would like to port to android. Will the JIT compiler make this possible by converting the runtime generated Java byte code to Dalvik at runtime as required?

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Android :: Does Compiler Detect Dead Code?

Feb 8, 2009

For example, will this result in any performance gain:
-- public static final boolean DEV_MODE = false;
if(DEV_MODE){ // log stuff, compute debug values etc. }

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Android :: How To Explicitly Invoke AIDL Compiler?

Jul 26, 2010

I'm using Eclipse with ADT to develop my project, but for some reason my AIDL files are not getting compiled into Java files. Is there a way to explicitly invoked the conversion of my AIDL files?

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Android :: Controlling Compiler Options In Eclipse

Oct 7, 2009

Is there a way to control the optimization level of the java compiler that Eclipse uses when building a project?Or is this question not relevant anymore, is all optimization deferred to the vm? The results of this tests imples test_f() is not being inlined, even though it really is a prime candidate for it. It should also be possible to do this inlining at compile time.I investigated this further, and it turns out Dalvik doesn't do inlining at this date.

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Android :: Objective-C To Java Cross Compiler

May 7, 2010

It is clear that cross compilers will not be allowed by the Apple App Store, so a developer will need to be familiar with Objective-C to create applications for the iPhone.I was wondering, is there a cross compiler that will take Objective-C application code and rebuild it into a similar Java application that can be packaged for Android? That way, a developer could still learn just one language (obj-c) but put out applications on many devices.I understand that the Java port would be less optimal than a natively coded application, but could conceivably save a developer some time.

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Android :: Dalvik JIT Compiler On Linux X86 Or Mac Build

Jul 1, 2010

As I've heard from Google IO 2010 session, Dalvik JIT compiler just support ARM processor.Do this mean my own build of Android source on Linux X86 or Mac OS X can not support JIT compiler?Should I use some target board with ARM processor to test Dalvik JIT compiler?

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Android :: Add Compiler Flags To Standard Build.xml

May 17, 2010

I want to add -Xlint:deprecated to the java compiler while building android app.I've seen the compilerarg tag inside javac tags, but the generated build.xml for the standard project doesn't have such a tag.

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Android :: Code Works In One Project But Won't Compiler

Oct 14, 2010

The following code was copied from one project to another. No errors in project one.

In project 2 I get:
-The method onClick(View) of type new View.OnClickListener((){} must override a superclass method
-implements androd.view.View.OnClickListener.onClick

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Android :: Internal Compiler Error When Compiling Native Code

Aug 9, 2010

Currently I am trying to compile native code for Android. The code is from the OpenCV port for Android. I pasted all the code correctly in my project and edited my make files accordingly. When I set android:debuggable to false everything works fine and I get my native library. When I try while android:debuggable is set to true I get an error.

Here is a part of the log:

CODE:....................

From what I have found on the internet this is caused by the optimization level of the compilation. As long as the code isn't compiled so that is is debuggable afterwards everything should be fine.

Now apparently it is possible to avoid this by setting APP-OPTIM := release in the Application.mk or adding -O2 to LOCAL_CFLAGS. I have tried both and still I get this error.

Right now I don't really care that much about debugging my native code, but I would like to have basic debugging enabled. And I don't want to keep switching android:debuggable in my manifest every time I want to compile. I'm not even sure if it is okay at all if I just set android:debuggable to false pre compiling and to true post compiling, but I am sure I will forget it every second run.

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Android :: Buildsystem On Ubuntu 10.04 X86-64 Occrur Internal Compiler Error

Jul 22, 2010

I'm trying to build android system ; enviroment: ubuntu 10.04, gcc-4.4 jdk 1.6-0-20
get source code follows http://source.android.com/source/download.html

$ . build/envsetup.sh

$ choosecombo

$ make

then compiler error occurs:

CODE:........

In line 554: the code below:

CODE:...........

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Android : App Crashes - Can't Find A Java Method Despite - No Compiler Error

Aug 20, 2010

My Android app runs fine, but: If I insert a call to WebView.setScrollbarFadingEnabled, it crashes saying:

Could not find method android.webkit.WebView.setScrollbarFadingEnabled, referenced from [my class]
VFY: unable to resolve virtual method 289: Landroid/webkit/WebView;.setScrollbarFadingEnabled (Z)V


I am using Android 1.5, not a custom ROM. My app defines minSdkVersion="3" I always clean before compiling.

Is setScrollbarFadingEnabled unavailable in Android 1.5? If so, why don't I receive a compiler error?

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Android : Extending Parcelables - Got Syntax Error From Aidl Compiler

Jul 15, 2009

I've run into the following issue:

Say I have an Animal class, which is parcelable, and I have a Dog class and a Cat class, which are subclasses of Animal and also implement Parcelable.

Say I have a service with the following AIDL interface:

sendAnimals(List<Animal> animals);

Now I'm calling this remote interface from some client application, passing it a List containing Cats and Dogs. What happens now is that android calls the Cat's and the Dog's writeToParcel() methods at the client side, but at the server side, the Animal's CREATOR is used, which calls Animal's readFromParcel() method. So the right data is sent from the client, but the wrong unmarshalling code is executed at the server.

I have tried to put this in the AIDL file:

sendAnimals(List<T extends Animal> animals);

This results in a syntax error from the aidl compiler though.

My current workaround is as follows: - In each specific Animal subtype's writeToParcel() method, I write the class name as a String into the Parcel as the first element. - In the Animal's CREATOR.createFromParcel() I read the first String out of the parcel, and based on that I create the appropriate type and call the appropriate readFromParcel() method.

I think this is kind of ugly though. I would expect the android framework to take care of this for me.

(My application is not actually dealing with animals, this is just to make it simpler to explain the issue)

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Motorola Droid :: New JIT Compiler For 2.2 Be Faster Than Overclocking?

May 20, 2010

Let's discuss board. Will the new JIT Compiler for 2.2 (FroYo) be faster than overclocking? And when we have 2.2 can we over clock?

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HTC EVO 4G :: Battery Indicator Pro Helps Battery

Aug 24, 2010

Please do not move this posting because this is only applicable to the EVO. The app Battery Indicator Pro received an update that will tell you how long before your phone is fully charged so you can pull your phone from the charger right at green light/fully charged. Nobody should experience the 5% dropoff in battery power using this app. If you can't pull the phone off the charger as depicted by the app, I don't know what else to tell you.

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Android :: Web Applications V/s SmartPhone Applications - Iphone - Windows Mobile - Android -Nexus Application

Jan 14, 2010

Q: How does Web Applications differ from SmartPhone Applications (Iphone, Windows Mobile, Android/Nexus Application) and in what specific aspects do they differ and in what degree ?

Also for example,

Q: Why we need mobile version of Web Application like gmail.com or bankofamerica.com specifically for smartphone devices where we can access same web applications on smartphone using internet connections ? In what aspect do they differ and why do we have those differences ?

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Android :: Bad Battery Performance

Aug 16, 2010

I deleted all battery monitoring apps and stopped looking at the battery usage info 50 times a day. I did this over one week ago, and couldn't be happier. No more looking at that god awful percentage meter, no more watching in dismay as it drops, and drops, and drops. My battery performance has never been better now that I quite looking at it all day and my sanity has slowly begun to return.

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Android :: Samsung Devices And 3D Performance

Dec 4, 2009

We acquired a Samsung Moment today, and find that it's 3D performance is very poor compared to the HTC and Motorola devices. I've tried all the tricks I know (color depths, rendering options), but can't get much out of it. Rotating a single textured quad is jerky. I understand that the Galaxy was missing a software component, and that once a surrogate was added, the 3D performance was acceptable. Does anybody have the real low-down on this issue? Specifically: * Do others also find the Moment to be a poor 3D performer? * Is there any word about Samsung fixing this? * Am I missing something obvious?

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Android :: VBOs Really Improve Performance?

Jun 19, 2010

I've been trying VBOs (3D) and I've seen no improvement at all on my Motorola Dext over not using VBOs.I've tried all kinds of configurations, interleaved arrays, by t buffers instead of float buffers, both direct and indirect. My question is, has anybody got any measured improvement in frames per second by using VBOs instead of exactly the same content without VBOs? If and only if so, what were your fps results? And can you therefore show me the "proper" way of doing VBOs instead of not? Has anybody else got exactly the same fps with and without VBOs?

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Android :: Enhance WebView Performance

Sep 6, 2010

My experience is that loading websites in a WebView is much slower than performing the same actions in the Android Web Browser. I can see that all files have been loaded in my Apache log, it will take a few seconds until the page is displayed in the WebView control, however. Opening the same page in the native Web browser will result in an immediate display. It seems that rendering is somehow crippled.Which browser settings do we have to apply in order to achieve the same performance as loading the page in the native web browser?

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Android :: OpenGL ES Games - Best Performance?

Dec 2, 2009

I'm experienced with openGL but not Android. I just started. I have some spinning cubes running on a Droid and I'm barely getting 30FPS. Should I be using GLSurfaceView to get the best performance or is there a better way?

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Android :: Use Traceview To Analyze Performance

Mar 19, 2009

I am getting complaints about my app's performance and want to get to the bottom of it. I am not really sure how to use traceview for that. I'd like to sketch how I used it and maybe you can give me some advice what to to differently and what to look for in the traceview output. The case: I have a list activity that lists articles. When clicking on one of the articles another activity is started that shows the article itself. I measure from the moment onClick() is entered on the ListActivity until the moment onResume() is about to be left in the Show Article Activity. I have two cases that I measure: "Cold" means the app is running and the ListActivity is started, but the Show Article Activity has not been called yet. "Warm" means the same, but the Show Article Activity has been called before during the runtime of the app. Here are the traces:.......

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Android :: Map Performance Poor Because Of Many Overlays?

Apr 17, 2010

I have a map in my android application that shows many markers (~20-50). But the app performs very poor when i try to scroll/zoom (in Google Android Maps i did a sample search for pizza and there were also some 20-50 results found and i didn't notice any particular performance problems when zooming/scrolling through the map).

onCreate() {
....
drawable = this.getResources().getDrawable(R.drawable.marker1);
itemizedOverlay = new MyItemizedOverlay(drawable,mapView);
...
callWebServiceToRetrieveData();

createMarkers();
}..............................

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Android :: Way To Improve Performance Of Laptop

Jun 4, 2010

I read on many other topics that the Android emulator starts really slow. Indeed, it takes +15 mins to start. However, on my machine is slow even after that.The 'phone' responds with a 3-4 seconds delay and everything has a huge lag.Is there any way to improve the performance of my laptop (Asus 1201N) is too rusty for the Android emulator? Tried in different emulator resolutions and the result is the same.My laptop has 2 cores with HyperThreading. And it shows as 4 CPU in Device Manager. However, when using the emulator, just one of the graphs is at 100%. Can I do something to make it work multi core?

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Android :: Sound Engine Performance

Oct 5, 2009

I am working on an app that uses the SoundPool class to play sounds. Basically every n milliseconds I need to play up to 16 sounds and I need this to be as steady as possible. The best solution I found so far is to use a java.util.Timer and the scheduleAtFixedRate method (setting also a THREAD_PRIORITY_URGENT_AUDIO in the TimerTask run method), the result is pretty good but it is still not perfect and sometimes the executions get slightly delayed. Is there some other way I should try to play sounds _exactly_ every n milliseconds? Different threads, some kind of optimization, stuff like this?

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Android :: 1.5 Performance Profiling / New Features Available In SDK?

May 1, 2009

One of the new features mentioned in the 1.5 SDK is "Easier application performance profiling". Can somebody shed some light on what new profiling features are available in the new SDK? Are those enhancements to TraceView, DDMS, or new profiling APIs ?

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Android :: Improve Activity Performance?

Oct 19, 2010

I am using following global variables in my activity

CODE:..........

I have made them global in activity because i need them all in more than 1 functions now my question is how to improve performance of my activity it is too slow should i make them static or what?

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