Android :: Starting Threads Slow - Get View Method To Load Image Asynchronously
Mar 21, 2010
I read somewhere (and have observed) that starting threads is slow. I always assumed that AsyncTask created and reused a single thread because it required being started inside the UI thread. The following (anonymized) code is called from a ListAdapter's getView method to load images asynchronously. It works well until the user moves the list quickly, and then it becomes "janky".
final File imageFile = new File(getCacheDir().getPath() + "/img/" + p.image);
image.setVisibility(View.GONE);
view.findViewById(R.id.imageLoading).setVisibility(View.VISIBLE);
(new AsyncTask<Void, Void, Bitmap>() {
@Override
protected Bitmap doInBackground(Void... params) {
try {....
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Jul 21, 2010
I use http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview/3068012#3068012 to load images in a ListView and a GridView. It works but the images are loaded form bpttom to top. How to fix that?
Bonus Question: Can I use a loading animation in a image view while the real image is loaded? Right now it's just a default image.
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Sep 15, 2010
Got the OTA like everyone else and everything works great. The ONLY thing I have realized is that my photo Gallery (the stock one) is running SOOO slow. I used to be able to flick through the photos without ever coming upon a grey square (with no pic). Now, after a strong flick, I get nothing but grey squares. They eventually load into pictures, but it takes about 3 - 4 seconds before they load. Any ideas? Could it be there are too many pics in the phone / card or is this as a result of the update?
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Apr 19, 2010
Was just in a thread and Fadelight's response was dead on. There are too many "Help!" "Please help" "What do I do" titled threads that give no clue about the thread content. If you want people to take notice let them know what the thread is about. Yea, eventually I will check out a thread titled "Oh No!" (morbid curiosity) but my first pick is one with a title that catches my interest.This has been a public service announcement. The thread titles have been changed to protect the innocent.
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Dec 18, 2009
My application has two components,one is Activity and BroadcastReceiver. I am using the BroadcastReceiver as inner class of my Application. The BroadcastReceiver's onReceive method is initiating a new Thread as Thread object,every time. In that i am trying to update the activity if it is in fore ground.If it is in back ground i am simply ignoring. But some times my application is hanging as my application's "HeapWorker" thread is taking 80-90% of the CPU.
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Aug 24, 2010
Is there a way to load an image file into an ImageView object, and then define a transparent color for this object?
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Jul 15, 2010
I am trying to delete large text messaging threads in the stock messaging app on my Sprint HTC Hero. It is taking an inordinate amount of time to accomplish this task. I deleted one thread that had a mere fifteen texts in and that took over ten seconds. Now, I just tried deleting a thread that has one hundred texts in and it has been minutes and it still has not deleted the thread. Has this happened to anyone else? Would deleting the data in the "Manage Applications" section delete these texts faster or would that be inadvisable? In my opinion this deletion lag is ridiculous.
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Jul 25, 2010
My messages threads have been taking about 10 seconds to load - no matter how many messages are in the thread. The initial list of message threads loads fine, but when I select one I get "loading" for a very long time. This has never happened to me before, and I have been running 2.1 since it was released. I tried restarting my phone... nothing.
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May 15, 2010
Anyone else starting to see slow down on their Incredible? Not just a little but the loading circle showing up when opening apps or closing them. Sometimes it takes 5-10 seconds for them to just start.I have also had the HTC logo show up when closing stuff (black screen and grey HTC logo) and then the circle.
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Oct 19, 2010
This works great for files.I marked the location needing refactoring to get it to work with a bitmap. I can't seem to find a compatible ContentBody for .addPart.The problem I am trying to solve is that I already have the image in an ImageView within an Activity, so rather than read it again from the SD cara, I want to pass it to this method directly.I will probably scale it while I am at it.
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Dec 9, 2009
First Droid Eris update makes the slow OTA rollout starting tonight - Doesn't say anything about battery fix yet
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Jun 18, 2010
Has anyone had an issue with their bookmarks (whether from the widget or the browser) taking a couple seconds to load? It's quite frustrating.
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Aug 26, 2010
i like the app but its way to slow to actually load up email. its faster to just go to k9 and pull it there.
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Jun 7, 2010
I currently use the SenseUI Messaging App for SMS. I had tried HandscentSMS but ultimately decided to go back to the SenseUI implementation, due to the way the app displayed the notification when I unlocked the phone (under the unlock slide bar). I've been texting the a certain special someone quite often, somewhere in the neighborhood of 1000+ messages at this point. I notice, that when I want to bring up her thread, the phone slows down and it takes a 10-20 seconds to come up. Other threads, take only a second or two to load. I assume this is because the HTC app is effectively trying to load all 1000+ messages. Is there a way to limit the amount of messages viewable or a way to archive the messages to my sd card?
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Oct 1, 2010
In my android app I call the voice recognition in my onCreate method of my startup activity. I have made it a preference to start up with the voice control or not. However, the app takes about 5-7 seconds to load when voice recognition is on. When it is off, the app starts almost instantly. Below is sample code, I have added Free_Form, max_results 1, and a custom prompt to mine.Why would calling the normal android speech recognition take sooo long to load in my OnCreate method?
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Jun 15, 2010
Anyone else having problems with the Google Maps App on the EVO? Whenever I try to view my location, zoom in or out, or drag the map around, all I get is the white pixilated screen. Sometimes it will load, sometimes it won't. Sometimes it takes over 3 minutes to load. I don't understand because I've checked my 3G connection and it's strong - I'm assuming the phone connects to the internet to download the maps. I used to have a Hero and it wasn't this slow.
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Sep 7, 2010
We can view an image with What if we have some images? How can we put the extras to let the viewer know we have /sdcard/a.jpg, /sdcard/b.jpg, /sdcard/c.jpg ? I hope to do this in a time because starting an activity is very expensive. Code...
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Nov 16, 2010
I have a scroll view with lots of image buttons. I want to change the image for an image button when it's pressed. The thing is that I want the image to remain until another image button is pressed. That's why I couldn't use a selector. What is the best practice to achieve his?
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Apr 3, 2014
I do not know why Hangouts load and show messages and SMS very slowly and it take long time to load it.for example I must wait for load one message or SMS.
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Feb 10, 2010
I have a vertical LinearLayout. I would like to layout 1 ImageView on top and 1 ImageView at the bottom of that LinearLayout. I tried putting 'android:gravity="top"' and 'android:gravity="bottom"' in each of the ImageView, but both ImageView appears at the top of the LinearLayout. Is there a way to fix it?
CODE:................
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May 11, 2010
I have galaxo 1.6.3.1. after playing around with the launcher (replaced AdvancedLauncher with Helix for donut) i now experience some troubles with the dialer - its extremely slow: when i press the dial button i takes about 5 seconds to load. if i click the Contacts tab it takes around 3-5 seconds.
I tried clearing the dial application's data (thus removing all my contacts and my call log), but its still slow.
Offcourse there's always the solution of reapplying update.zip but i want to avoid it
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Nov 18, 2010
I'm working with an Android app that generates a text file and stores it on the sdcard.
I would like to open the file in a text editor. The one I have installed is Office Suite Professional.
I have the following code:
CODE:.........
When I run this snippet of code, I get the following error: Sorry! The application XXXX () has stopped unexpectedly. Please try again.
How can I get my app to load OfficeSuite Pro with a specific file?
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Aug 27, 2010
Download and use a program called Android Central Sideload Wonder Machine. It's a one click solution, works amazingly on the Captivate and requires no hassle. The program claims to work on un-rooted phones (though mine is rooted).My girlfriend's Captivate is not rooted though so I will test this out on her phone as well to confirm it. Check it out though. I've already gone to town with this and it works great.
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Jul 19, 2010
Would this be a ROM issue? Maybe an issue with Launcher Pro Beta? When I hit my home screen button, it takes a few seconds for my shortcuts and widgets to load. I really like LPB but am not liking how long it's taking to load. I set it as my only launcher in my ROM that I made so I can't go into another launcher and see if it's slow, does anyone think that could be the culprit?
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Oct 10, 2009
I want to place first image view in gallery view starting from left side of the screen, instead of centre. Right now, it always position of first tem always starts from centre. Any help on this would be highly appreciated.
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Nov 16, 2009
I'd like to show a png or jpg I downloaded from the next in an image viewer intent, but can't get it to work.
Bitmap bmp = getImageBitmap(jpg);
String path = getFilesDir().getAbsolutePath() + "/test.png";
File file = new File(path);
FileOutputStream fos = new FileOutputStream(file);
bmp.compress( CompressFormat.PNG, 100, fos );
fos.close();
Intent intent = new Intent();
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(path)), "image/png");
startActivity(intent);
I know the bitmap is downloaded ok (use the same routine for supplying it my ImageView instances elsewhere in my app) - I think it wrote to file ok, I can see it on disk and the file size is correct. The intent is launched but an exception is thrown: then the new activity just sits there, blank. How does this work?
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Jan 2, 2010
How can we HTML.from HTML to load image from web and set into imageview ?
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Jan 28, 2009
Here is the code that I have been using, first it will display the image cached on the android app and then lazy load the other image from the web but from the debugger, it does not look like it fully works. Code...
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Nov 6, 2010
I was thinking, maybee the best way of loading pictures that I have on the server, using for my site would be to get the url for the picture..
How can I load picture from a url to ImageView?
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Mar 16, 2010
I need to create a object Image from import javax.microedition.lcdui.Image; using a file .png placed in drawable folder. How can i do that?
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