Working very slow
My application connects to web server, downloads data (approximately 43000 Bytes) and do mathematics function (such as log, +, -, * etc...) on each byte.
To prepare apk file, it is just like publishing to android market. Turned off debug mode and deactivated all loggers.
Then put it to the web server and downloaded (installed) on my HTC device. After installation, I've tested the application. The time from beginning read bytes to end of task is approximately 4 minutes. It is very slow.
I've researched this part. It seems that is working slow on mathematics functions.
Is there any way to increase working speed ?
My code is same as iphone version of my application. It is very fast. All parts complete in 4 - 10 seconds.
What is wrong here ?
Or do I need to any configuration (related debug mode) ?
Asked by: Daryl873 | Posted: 25-01-2022
I would suggest to benchmark raw math performance on both platforms.
Not all mobile CPU's have hardware FPU module, so complex math might be VERY slow.
Workaround is to implement math functions via integer calculations with limited precission - this could give you some 2-10x performance boost if it's really emulated math.Answered by: Hailey141 | Posted: 26-02-2022
The first step in solving any performance problems is to identify them. You should profile your application to identify exactly where the problems are.
You can use the
traceview tool to profile your application. Have a look at this question for instructions on how to use
Native methods using the Android NDK is an option for performance-critical code sections. It's complicated and requires careful attention to compatibility issues, but could give you the performance boost you are looking for.Answered by: Lucas160 | Posted: 26-02-2022
Android and JSP - Working with objects
I'm a student trying to dive into the world of "complex web-enabled applications" for Android. I had good tries making Android applications that call php functions, have JSON or XML responses and results, serialize objects and so on... It really can work for simple projects, IMHO. For projects that require an increased complexity and control, I really would like to try something else. Since Android apps are...
android - digital compass problem
I am creating an augmented reality application and I noticed that the stored locations don't appear appear on the correct direction if I try to use the camera view (using layar or wikitude API). The problem is that the digital compass doesn't show north correctly when you try to look at the known objects through the camera view. If align the phone with the ground (look at my shoes) the locations appear at the screen accord...
android - How to remove labels from a MapView?
I am trying to make a satellite view (via a MapView) without labels. How can I do this?
android - Custom title with image
i'm creating custom title for activity by disabling standard one and managing everything myself. I wonder if it's possible to replace/theme standart title to my needs. I can customize size, background image, and text via themes by changing windowXYZStyle items. The only thing i couldn't find - how i can add image instead of text. I've tried requestWindowFeature(Window.FEATURE_CUSTOM_TITLE) and ...
canvas - Android draw with blur
I need do draw on Android's Canvas using Blur effect, it is a very simple feature, I need to draw a circular area, which is blurred (the foreground) and the background transparent, I can do everything with manipulating the colour alpha to do it with custom transparency but I need it to be blurred instead of transparent.. any ideas?
layout - How to resize a android webview after adding data in it
In a layout (linear, vertical) hierarchy I've got several views and one of them is a WebView. They all have same parameters: android:layout_width="fill_parent" android:layout_height="wrap_content" For all views, the spacing between elements is correctly handled but for the Webview there is a lot of spaces after the displayed text inside. I set the (HTML) text of the webview in the ...
How to find easily the source of an android class
I know I can access android source code from https://android.googlesource.com, but it's hard to select the right git repo if I only know the package and the name of an android class. Isn't there a way to locate a file in https://android.googlesource.com?
camera - Android Intent Save Path
At the moment I am using two intents. One for voice-recording, another for the camera: Intent photoIntent = new Intent("android.media.action.IMAGE_CAPTURE"); startActivityForResult(photoIntent, ACTIVITY_TAKE_PHOTO); Intent voiceIntent = new Intent(MediaStore.Audio.Media.RECORD_SOUND_ACTION); startActivityForResult(voiceIntent, ACTIVITY_RECORD_SOUND); My aim is to put an Extra to each of t...
Android "hover" event in custom layout
I have a custom layout that I have written that basically just displays a bunch of ImageViews. I am handing onTouch events for all the ImageViews in my layout. However, if a user touches one imageView and then drags over another ImageView, I would like to be able to handle that as well. How would I go about capturing this behaviour?
android - What is the ideal place to cache images?
I am fetching a lot of thumbnails in my application from a remote server and lazy-loading these in a list view. The image fetches run in a background AsynTask and when completed the fetched images are stored in a HashMap using SoftReferences. This works just fine but when the images in the cache gets GCâ€™d, the fetches have to be rerun. I could have stored them on the SD card so there would be no...
How to create a tree view in Android?
There are no controls in Android that provide Tree-like View. There is an ExpandableList View which I suspect could be used to creating one. Have you tried imlpementing such a control? How would one implement such a control in Android?
Still can't find your answer? Check out these communities...
Android Google Support | Android Community | Android Community (Facebook) | Dev.io Android