Android :: Common Performance Pitfalls On Droid?

Oct 1, 2009

What are the most easy mistakes to make that can be performance sinks on Android?

The documentation mentions "some floating point operations" can be "on the order of milliseconds" - has someone tested this?

For the sake of discussion, let's assume its running on a G1/similar device.

Android :: Common performance pitfalls on droid?


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Android :: Pitfalls To Remember While Programming For Droid?

Aug 24, 2009

Are there pitfalls or the points to remember while programming for Android? I think the list will include topics on Multithreading, Persistent Storage, etc.

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Android :: Pitfalls When Using Static Functions?

Sep 30, 2010

I use in the getView()-Method of this example a static function to download the source of an ImageView. Later there will be threading included. However, I like to know in general how save the use of static function is in this case.

Because I experienced, that in some cases (when I scroll really fast) the Images get mixed up.code...

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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device in question, but I'm talking rough numbers here.This question is a duplicate, but since that post is heavily outdated, I figured it's irrelevant by now.

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HTC Droid Eris :: Facebook NewsFeed In Random Order / Is This Common - Fix It?

Sep 15, 2010

I'm using the Facebook mobile site and the News Feed never comes up current with the newest listed first then descending. No matter how I refresh, or if I hit 'Home' or the actual "News' button. It randomly scatters them (differently each time I try to refresh). I tried the FB app that came with the phone as well - and the same thing happens. I've cleared cache, rebooted, and yet nothing seems to help. On my computer and laptop, the most recent are always listed first.

Is this common? Does anyone else have this problem? I've been watching the forum for quite some time to see if anyone else posted this problem and haven't seen anything yet......

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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 :: Common Component Externalization

Jan 8, 2010

I am a game developer and have developed a nice global high scores module. The source code is in two different games of mine and anytime I make changes I carefully copy and paste the java files from one project to the other. As I increase the sophistication of this module, the copying and pasting can take a day or two to make sure I get it right. Now I am finishing up my third game and want to add the high scores module, but copying and pasting this in three separate projects seems absurd and will take up much of my time! Is there any way to externalize this module?

Unfortunately, the module makes reference to R for strings, layouts and other resources. It also uses common Android functions and resources from the Android library. Almost anything would be easier than the method I am using now--so any and all suggestions are welcome!

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Android :: Accessing Common Methods Among Activities

Jun 20, 2010

I have Activity A and Activity B. I want to access a method in Activity A from Activity B. This is my method:
Activity A extends activity{
public void save(){
} }

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Android :: Several Activities Sharing Common Code

Jul 2, 2010

I have an Android application composed by several Activities. Most of them need to check whether an active network is available or not:

public boolean isNetworkAvailable() {
ConnectivityManager cm = (ConnectivityManager)
getSystemService(Context.CONNECTIVITY_SERVICE);
TelephonyManager tm = (TelephonyManager)
getSystemService(Context.TELEPHONY_SERVICE);
...
}

I would like to move that code to a helper class in order to avoid the need to write that code in every Activity, but calls to getSystemService are only allowed from an Activity. The other alternative is to move that code to a parent activity use inheritance but:
Every activity already extends from android.app.Activity
Some of my activities already extend from a common my.package.BaseActivity
(Activity <- BaseActivity <- XXXActivity)

What do you recommend in this case? Is there any other alternative?

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Android :: Common Code For Two Similar Applications?

May 7, 2010

I have a set of common code (including .java files and resources), which I have to use for two similar applications with different package names (for different vendors). How can I maintain two packages which share the common code without making two copies of the common source?

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Android :: How To Put Common Header For Entire Application?

Jan 30, 2010

I am Working on develop an application .In my application I want to Put application header as it look like "Android Market Application". I need help on following issues.
1)How to put all header same for all activities in the application.
2)How to put the common header like in android market application.
3)How to put a common footer for all activities in application.
If possible send source code for my understanding.

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Android :: Include Tag And Text - Common Formatting

Apr 15, 2010

I'm trying to use some common formatting for a number of different labels, all with different text. From http://android-developers.blogspot.com/2009/02/android-layout-tricks-, it seems as though I should be able to do something like the following:
<include android:text="@string/description" layout="@layout/label"/>

Where, in label.xml, I have:
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
<!-- more detailed formatting to come later --> />

For some reason, the text of the label is showing up empty when I do this. But I can successfully add an ID in this fashion, and then change the text of the label in my application code. For example:
<include android:id="@+id/description_label" layout="@layout/label"/>

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Android :: Package My Common Code As Library

Aug 31, 2009

I have done some cusomtizations on general user interface behavior. I would put those features into my applications. Therefore, I package my source code as a jar and add this external library to my applications.

As my cusomtization include some inflation of xml files, I put those resource in my package. However, when I finished compiled my application and ran it, it reports error. It seems cannot locate the xml file in the jar. (My debugger stop while inflate the xml file). Do I miss any step to use my jar file?

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Android :: Common Bottom Layout In All The Tabs Of TabHost

May 24, 2010

I have a TabHost with 4-5 tabs. I want to have a similar bottom for all the tabs. Is there any way we can add a bottom to all the tabs? Or do I need to place the xml code in every layout file.

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Android :: How To Launch Viewer For Common File Types?

Apr 9, 2009

Is there a way to launch a viewer for common file types like TXT, DOC, XLS, PDF from within an app, like Gmail does. Maybe a Google Docs api to pass the file to GD and have it open in the browser?

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Android :: Versioning And Common Code-bases With Eclipse

Sep 14, 2010

I'd like to bring out an Android app in the near future, so I was wondering how to support a couple of funcitonalities I have got used whilstdeveloping for J2ME and iPhone

first the versioning. With J2ME (using NetBeans as IDE) I had the option to auto-increment the softwwares version every time I compiled it. I was wondering if something like this is available for Eclipse and if so how to use it ? secondly a common code base. Is it possible to have a common code base for several projects ? For example I might have a game which actually uses the same code but needs different graphic resources. I'd hate to have a different project for every game/app and have to manually edit every project's source every time I want to submit a new code-change.

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Android :: Way To Define Common Properties Just Once / Add Them To Each TextView Element?

Nov 6, 2010

I'm making out a few menus for my Android App and throughout there is a standard textview that is repeated 5 times, only changing the android:text tag each time, everything else is the same.There are a good number of properties on this and it feels very inefficient to be copy/pasting all these for each of the textviews.Is there a way I define the common properties just once and add them to each TextView element?

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Android : Absolute Best Droid Performance?

Oct 29, 2010

I am trying to go widget-free, using Zeam launcher instead of LauncherPro which seems to randomly have issues for me, I'm just wondering what tips you all may have for getting the best performance possible from your phone. I'm on a Captivate. I care more about in-app performance and stability over bells and whistles. What do you suggest?

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Android :: Shared Code Project Across Applications In Common Library

Apr 14, 2010

I am currently moving from Xcode and iPhone development to Android with Eclipse. I want to have a shared code project so that I can store all the code to be shared across apps in one common library. However it would appear that the only android project available is for applications and not for code libs how can i achieve this?

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HTC Droid Eris :: Will Android 2.0/2.1 Improve Performance?

Dec 3, 2009

Will Android 2.0/2.1 improve performance? The Eris is a cool phone and all but it simply cant keep up with me. There is nothing wrong with my phone also. I have rebooted it and have 80mb free memory. Same thing at Verizon store display phone. It just cant keep up and the lag and waiting periods (1 second or so) are annoying me. Yes one second is alot of lag time when you are trying to do things. It sounds like "only one second" but there are 100 of these one second lag times all over the phone. Im not even an "expert" or "hardcore" user.

Anyon know if Android 2.0 will run faster? Playing a simple MP3 while trying to navigate the phone increases the lag times. Why dosnt the older iphone 3g have these lag issues when they both have equal CPUs?

When will Google and HTC aknowledge the MAJOR issue with the ENTIRE phone slowing down the a crawl once available RAM goes under 30mb. (common with all Android phones) Is it SO hard to have the ability to shutdown apps and automatically remove them from ram when Im done using them? This is the same stupidity Windows Mobile went through back in 2003. Yes I understand that Android will remove unused apps from RAM to make room for the next one but this is where the lag is coming from. The entire phone slows to a crawl unless you free up some memory with 3rd party apps.

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Android :: Reason For Low Droid Performance / Improve It?

Nov 2, 2010

My android application works well but it's performance(speed) is slow. In my logcat i saw frequent garbage collection operation like

11-02 15:07:20.647: DEBUG/dalvikvm(12571): GC freed 295 objects / 38448 bytes in 93ms

Is this the reason for low performance? How can i improve my applications performance?

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Android :: Get Performance Increases Using Processing For Droid?

Oct 14, 2010

I have converted a few of my Processing sketches into Android apps, but they seem to run really slowly in the emulator and on my device.

Are there any tips on how to increase the speed and performance of my sketch running as an Android app? Are there things or parts of the Processing API I should avoid?

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Android :: Droid Logging - Clear For Better Performance?

Sep 17, 2010

New to Android and just looked at http://developer.android.com/reference/android/util/Log.html

My question is regarding everything except debug. How do these Log entries get cleared such as Error so that they don't consume space? Also, Is there a way that the logfile can be queried so that it can be sent to a central web service or something for quality purposes etc.?

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Android :: Integrate Applications With Common Settings Application - View - Activity

May 25, 2010

The application I am developing is in large parts a background-only Service BUT requires some settings that the user must add. Is there a way to integrate applications with the common Settings application/view/activity?

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Android : Sharing Common View Layouts And Resources Across Multiple Applications

Jun 2, 2009

I am working on developing several individual android applications. We had created common UI Layout View XMLs, classes and resources. I would like to share these common layout xml, classes and resources across all of my android applications. I dont want to duplicate them in my applications. Is there any easy way to do this?

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Android :: Motorola Droid - Poor Accelerometer Performance

Dec 7, 2009

I just got my Motorola Droid and installed my little accelerometer app right away. All it does is registering a SensorEventListener if the user clicks the start button. It also takes the current time in millis. Every time onSensorChanged() is called, a counter gets bumped. After the user presses the stop button, the listener is unregistered and the time taken again. Using the values from above, I get a samplerate of 9 samples/sec which is WAY too low for what I want to do. The delay of the listener is set to SENSOR_DELAY_FASTEST. The Listener is registered within the main activity and is executed on the main thread of the process (I guess).

The G1 we used before was getting samplerates from around 35 samples/ second, which is way better, but still bad. Any suggestions on why the SensorEventListener performs poorly? The system is Android 2.0. App is compiled using API-Level 5.

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Android :: Test Performance Of Droid Application / Tool To Do So?

Dec 30, 2009

How can i test the performance of an android application ? Is there any tool that i can make use of ?

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Android :: Ways To Optimize Code And Performance In Droid / Tools Available?

Aug 23, 2010

I want to do optimization of my android application.

Can anyone please tell what are different ways to optimize code and performance in android?

I gone through one tool i.e. Zipalign: an Easy Optimization.

Any other tools available?

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Android :: Replace Standard Droid JSON Parser For Better Performance?

Mar 23, 2010

I know that Android has a JSON parser baked in but I was wondering if it was worth using something that offered better performance (like Jackson - see http://jackson.codehaus.org/) ? Anybody tried that ?

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Android :: Monitor Performance Of Thread On Droid / Its As In Any POSIX Library?

Aug 25, 2010

Is there any way to monitor the performance of a thread on Android phone.

As in any POSIX library?

I want to find the time taken by a "thread" during execution, while many other applications might also be running.

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