Android :: How To Lazy Load An Image From Web ?
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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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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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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Jan 2, 2010
How can we HTML.from HTML to load image from web and set into imageview ?
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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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Jun 16, 2010
How to load an image in ANDROID?
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Sep 12, 2010
I want to make a simple image viewing program, that just takes the images from a certain folder, and loads them from it.
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Jan 15, 2010
I realise the correct way to load an image is from res/drawable but imagine that was not a possibility. If you had to load an image from an attached jar file, how would one achieve it?
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Jun 3, 2010
My app uses a WebView widget to load ads from Google AdManager. AdManager gives you an HTML snippet, which is 90% javascript to call their server for the image to load.
I put their html snippet into a string and use String.format to add in several variables that AdManager requires.
I enable javascript on the WebView (webView.getSettings().setJavaScriptEnabled(true);)
I load the string into the WebView (webView.loadData(myString, "text/html", "UTF-8");
result: the ad never loads (although the WebViewClient shows serveral .js resources loading).
If I take that exact string and create a file and then use webView.loadUrl("file:///android_asset/test.html"), the image loads properly.
Why would loadUrl work but loadData does not?
I've verified that javascript is running. I injected a little script to write out a text string and it works.
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Feb 17, 2009
I want to load image - background - on layout. I use eclipse tool to develop application. Help me???
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Jun 1, 2010
I am using BitmapFactory.decodeFile to load Bitmaps of images into my application. However, the function returns null on large images (such as those from the camera). The filepath is definitely correct, I just can't figure out why it would return null. I tried supersampling, but it didn't seem to help.
Does anyone have any idea why it would do this or how I could more easily load images taken from the camera into a Bitmap?
Here's the code I am using...
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May 20, 2009
Getting error to load image from website. code...
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Sep 8, 2010
Does anyone has the example of loading images from the sdcard to Image Switcher?
I'm a beginner of android here. Willing to learn.
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Jul 19, 2010
What i'm trying to do is just simply have the button load an image at random. However, the button doesn't seem to be working. When i first load the activity there it works fine and there is a random image....But when i press the button it's not loading another like i need it to. Any idea what i have wrong here? It looks fine to me...
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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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Oct 3, 2010
I've used this guide for rooting and rooted him smooth BUT,when I do this step: 5. Run "Terminal Emulator". Type (press and hold menu to get the keyboard up) in the following: su (press enter and wait for the "Super User Request Prompt". Choose "Allow" and make sure its ticked to Allow every time.) flash_image recovery /sdcard/recovery.img it replies: flash_image: not found.... (and i did typing OK,I tried with renamed and un-renamed file). OK,then I tried with Flash rec from this tutorial BUT.... Flash custom recovery is missing. There is only: download recovery image button,but blanked. I just don't get it,img file is in /sd/recovery.img or longer version: /sd/recovery-RA-hero-v1.5.2.
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May 3, 2010
Do I have to buy a certain kind of micro SD card for the Eris? I bought an extra 2gb Sandisk micro SD card and I tried to use it to update my friends phone to 2.1 v3 and it didn't ever load the image when in boot. I finally had to take my card out of my phone and use it. A pain, but it worked. I'm just wondering if I got the wrong card?
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May 14, 2010
selling it, need it to go back to stock rom before i sell it, do i simply add the recovery-ra-heroc file to my sd and flash like a rom? do i wipe first? how do i wipe? trying to sell now need to do this quick.
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Jul 5, 2010
I've reviewed some posts about lazy loading but I believe my problem is a bit different.
I have a gallery (my class extends Gallery) which displays 20 rather large in size images (400-500K each). I cannot load them all to gallery since I get an OutOfMemory exception.
So, I created an array of 20 Drawables and initially populated the first 9 elements (the images come from the Web) and set all the rest to null. My intention was this: on a fling to the right, fetch element no. 10 and set to null element no. 0. On another fling to the right fetch element no. 11 and set to null element no. 1 to null. Same logic on a fling left.
The problem is I can fling much faster than the elements are fetched.
My gallery has a BaseAdapter and its getView() looks something like this:
CODE:.......................
How do I tell getView() - if imageArray[position] is still null, show a "loading..." dialog and once it is set repeat yourself with the same position? I don't want to see the imageView empty and then set on the fly. I want to not be able to see the imageView at all until it is set.
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Jul 22, 2010
I try to implements lazy loading of images in a listview. There is no android features to make this, so I should implement it by myself. Have anyone already done this? Take the solution care of scrolling and lazy loading new images and stop to load not more necessary images?
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Dec 8, 2009
I trying a hand at ListViews and my current experiment is aimed at displaying some data in a ListView. The data to be displayed in each row is simple: an image and some text. The images come from a remote server and the textual data is hardcoded. I have a class that downloads images using AsyncTask and caches the list of images fetched as SoftReferences in a LinkedHashMap. I am also passing a reference of the view to this class, so when the image download/cache read is complete the class will set appropriate Bitmap in the view.
Code...
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Sep 22, 2010
I implemented the lazy-loading images in my ListView. I use a AsyncTask to download the image from the internet and bind it to the ImageView in the UIThread. It's working except that when I scroll the ListView vary fast, the downloaded images sometimes are binded into the wrong items in the list.I guess the problem is from the reuse of convertView in the BaseAdapter. Code...
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Nov 1, 2010
In my Android App I have a listview containing 30 rows, and each row consists of several textviews of which one is spannable and sometimes contains a lot of formatted text and images. Those images are loaded from the web asynchroneously: A placeholder is displayed until the image has been downloaded is then replaced by the image. Unfortunately, the rows of the listview are loaded when I scroll over them. This makes the whole thing very slow. Also, those images are loaded from the web again and again, whenever I scroll over the row. can I turn it off, that the ListView rows are loaded when I scroll over them? They should be loaded once when I start the activity and never again.
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Feb 13, 2010
Here are 4 references that I have found for lazy-loading images into a listview in Android. The idea is to display a placeholder image, get the actual image in the background, update the ImageView in the list when the image is available. I've tried to do this in the simplest way possible using an AsyncTask in an Adapter. The outline of that approach is below. Is it flawed? Is there an agreed approach to handling this common task? Code...
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Sep 11, 2009
This is a very common scenario: displaying images in a ListView which have to be downloaded from the internet.Right now I have a custom subclass of ArrayAdapter which I use for the ListView. In my getView() implementation of the ArrayAdapter, I spawn a separate thread to load an image. After the loading is done, it looks up the appropriate ImageView and sets the image with ImageView.setImageDrawable(). So the solution I used is kind of similar to this one: http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listviewThe problem I'm having is that as soon as I make the call to setImageDrawable() on the ImageView, the ListView somehow refreshes all currently visible rows in the list! This results in kind of an infinite loop. Code...
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Oct 1, 2010
I have found this example http://stackoverflow.com/questions/541966/android-how-do-i-do-a-lazy-load-of-images-in-listview/3068012#3068012 from Fedor which is absolutely great for what I need.
I have a question. if beside the Clear Cache button there would be a button with Cancel. How could I in onClick cancel the image download thread from the UI? code...
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Oct 16, 2010
I am writing my first application and am trying to get my widget to load a different image when it is added to the home screen based on the state of the notification volume.It is detecting the notification state fine and the proper Toast messages appear when I add the widget, but I'm not getting any icon.I just get an empty button.I'm using the same code to change the icon in my onReceive() method to do other things and that works fine.Is this the proper way to accomplish that?
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Mar 4, 2010
Does anybody have an example of lazy loading (about 10,000 items) an Android ListView from a Sqlite databse?
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Oct 24, 2010
What is Lazy List? This folder appears on my SD Card with over 7mb of randomness. This folder appears out of no where. I've deleted and it seems not to hurt anything (probably should know what the heck I am deleting first, heh) but anyway after deletion it comes back again but it takes a little time.
One might think it appears to be tied from a market app however I only started getting this after rooting. (I think) I download only well-known popular apps from the Market. My hubby has the same apps and does not have this folder.I've searched google and the answers I get are all the same.. The same question with no definite answer. So anyone know what this is? What is causing this folder? Anyone else have this folder? It's driving me crazy because I like to know what the heck is on my SD CARD.
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