Android :: BitmapFactory.decode And Exit Data In Images
Oct 19, 2010
I'm downsampling an image via BitmapFactory.decode then base64 encoding the bytes to ship to the server. (long story on the latter part of that formula) It seems this process nukes all Exif data in the image data. Am I approaching this the wrong way or is this a fact of life?
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Jun 19, 2009
I am tring to get a image from the images stored on the sdcard of my Android but i am getting a skia error using BitmapFactory When I just take the image directly without using BitmapFactory class I get the image. But the purpose of using BitmapFactory is scaling down the image size by using inSample =4;
but I get skia as the error..................
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Oct 27, 2009
For my current application I collect images from different "event providers" in Spain.
However, when downloading images from salir.com I get the following logcat output: 13970 Gallery_Activity
I Fetching image 2/8 URL: http://media.salir.com/_images_/verticales/a/0/1/0/2540-los_inmortale... 13970 ServiceHttpRequest
I Image [url] fetched in [146ms] 13970 skia D --- decoder->decode returned false
Searching for that error message didn't provide much useful results.
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Apr 19, 2012
Need to display images downloaded and extracted from a zip into the "/files" directory of the app. the images are getting in there properly as far as i can tell - i am able to extract them from the emulator and view/open them from my desktop. but every attempt, every variation of code i have found and tried so far has failed (Tag: skia / Text: --- decoder->decode returned false).
My latest construct, which does work for image files downloaded separately and uncompressed :
Code:
String imgFile = new File(getFilesDir(), "myImage.jpg").getAbsolutePath();
ImageView myImageView = new ImageView(this);
Bitmap bm = null;
try{
bm = BitmapFactory.decodeFile(imgFile);
myImageView.setImageBitmap(bm);
} finally{
mainLayout.addView(myImageView);
}
And here is the construct i am using to handle the zip extraction. I assume this is where the problem lies but i am clueless as to what i could possibly do differently and to what effect:
Code:
ZipInputStream zis = new ZipInputStream(fis);
BufferedInputStream in = new BufferedInputStream(zis, 8192);
ZipEntry ze;
while ((ze = zis.getNextEntry()) != null){
File dest_file = new File(getFilesDir(), ze.getName());
[code]....
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May 5, 2009
I want to decode high resolution pics something like 8 mega pixel images and view it. when I try to decode them I get out of memory exception. Decoding of single 8 mega pixel also fails . From the Imagamanager code and other post I could use BitmapFactory.Options inJustDecodeBounds I could get a scaled down version of the Image . code...
Is there any way to decode part of the Image and fill it on the screen and by scrolling decode other region of the image and display it.
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Sep 16, 2010
I would like to build a live streaming and viewer.
The streaming is H264/MEPG4 raw data.
How to decode these raw data on Android?
I can not find usable API in Android SDK to do it.
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May 27, 2009
Does anyone know how to decode the camera data from the PreviewCallback? I need to capture camera preview frames and process the bitmap obtained by decoding the frames before displaying.
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Sep 15, 2010
Is there any good way to decode video raw data such as H264 and MPEG4? I try to develop a live viewer which receives video frame from Internet. So, I need a decoder to decode these raw data. Porting ffmpeg library seems a good idea, but there are only few information about this. There are two questions: 1. How to porting ffmpeg to android? 2. How to use ffmpeg in android(Hello world example)? Any suggestion is welcome.
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Dec 9, 2009
I am streaming an MP3 audio and instead making this MP3 audio to play, I want it to be converted to PCM format and pass this PCM audio to AudioTrack(as it takes PCM data as input.) instead of passing my MP3 stream to MediaPlayer. Can anyone please help me to convert the MP3 to PCM stream?
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Aug 23, 2010
I am downloading some images from website using xmlrpc now i want write the url of those images into xml files how to add data to exiting xml file in android
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Jul 18, 2013
I'm working on an Android app, that connects to a .crl file on the Internet and gets some data from it. I need to be able to decode this file (like the ASN.1 JavaScript decoder) and then use the decoded data.
how can I access the decoded data from my Android app? Is there some way to reference the decoded text online?
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Mar 29, 2010
In my application during downloading of images, for some of the images i got the error like
D/skia (374): --- decoder->decode returned false
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May 27, 2010
I need to decode HTML entities, e.g. from ¶ to ¶, and & to &.
URLEncoder.decode(str) does not do the job (convert from % notations). TextUtils has a HTMLencode, but not a HTMLdecode.
Are there any function for decoding HTML entities?
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Jan 24, 2009
Will anybody guide me, I want to decode image bitmap picked from Picture application(on a android phone), so How should I achieve this. First thing is how to retrieve image from Picture application, after picking it, if I assign it to temp image variable, is there any method in Bitmap.Factory to decode this image into bitmap.
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Sep 23, 2010
I am getting following encoded html as a json response and has no idea how to decode it to normal html string, which is an achor tag by the way.
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Jun 4, 2009
I want to know an image's width before decode it, so that I can set Options.inSampleSize if the image is too large. Any advice to do that?
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Apr 28, 2009
Like many others here I'm getting OutOfMemoryError from BitmapFactory when decoding multiple bitmaps. I am sure I am not leaking memory. Here is the system log from a crash:............
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Nov 5, 2010
In my app, I am creating a bitmap from its colors code like this :
CODE:...............
And often I get the outofmemoryerror: So how can I use the BitmapFactory optimisation to avoid this problem? because I don't have an input stream or a file, I only have an array containing my pixels.
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May 7, 2010
I am trying to open a remote Stream of a JPEG image and convert it into a Bitmap object code...
The decoder returns null and in the logs I get the following message:
DEBUG/skia(xxxx): --- decoder->decode returned false
Note:
1. the content length is non-zero and content type is image/jpeg
2. When I open the URL in browser I can see the image.
What is that I am missing here?
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Jun 9, 2009
I get a OutOfMemoryError at BitmapFactory.decodeByteArray when bitmap size is large; Following is the code snippet:
BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 8; Bitmap bitmap = null; bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, options);..........
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Aug 8, 2009
basically what i'm attempting to do is place several images into 1 zip file, and then read the images back out of the zip file, and draw them onto a canvas using BitmapFactory. This is what my code looks like, but when i debug i only get a source not found error.
Code: try {..............
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Oct 3, 2009
I have an activity which performs an image search, the results (URLs of thumbnails on the web) are rendered in a GridView. My GridView adapter class delegates creating the actual Bitmaps to an AsyncTask that loops to sequentially fetch the image content from each URL using HTTPClient, and creates the Bitmaps using:
BitmapFactory.decodeStream(entity.getContent()).
I found that the above method sometimes returns "null" silently instead of creating a Bitmap. The occurrences appear to correlate with larger stream sizes (I check this by logging entity.getContentLength()). However, if I put a breakpoint just prior to the decodeStream call & then resume immediately every time I hit it (i.e. pause briefly on each iteration), the Bitmaps are created perfectly every time. All the images are quite small (most <10K), so the download & decodeStream happens fairly quickly. There are never more than 10 images processed in one AsyncTask.
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Sep 17, 2009
I can't wait to try out the new 1.6 goodies, but first I'm retargeting my existing applications, and I decided to start with Daisy Garden. Changing to android:targetSdkVersion="4" caused the application to segfault on startup and discovered that the BitmapFactory.decodeResource method now performs scaling based on screen density. In this case the behaviour is unwanted - I'm loading a set of masks that are scaled later during composition. So I've quickly inserted the following method, which seems to perfectly mimic the previous behaviour:
private Bitmap loadBitmap(int resId) { BitmapFactory.Options options = new BitmapFactory.Options(); options.inTargetDensity = 1; options.inDensity = 1; return BitmapFactory.decodeResource(context.getResources(), resId, options);
}
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May 7, 2010
Is the BitmapFactory.decodeStream method thread safe?
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Jan 30, 2010
I am working on an app that displays photos which are downloaded from Flickr. I obtain a Bitmap object from a byte array, which in turn is read from the relevant Flickr URL, as follows: Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length); The problem is that the resulting bitmap is pixelated and I can't figure out why. To demonstrate, here is an example of a picture created via BitmapFactory.decodeByteArray versus the original picture obtained directly from the relevant Flickr URL:...
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May 22, 2009
I was reading in some other posts that some developers have the same Problem, but till now, no solution. its about the gallery: I have a string array with photos, but when the gallery does show the 2nd Picture it crash with:...............
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Jul 26, 2010
I am using the previewCallback from the camera to try and grab images. Here is the code I am using
private Camera.PreviewCallback mPrevCallback = new Camera.PreviewCallback()
{
public void onPreviewFrame( byte[] data, Camera Cam ) {
Log.d("CombineTestActivity", "Preview started");
Log.d("CombineTestActivity", "Data length = "
+ data.length );
currentprev = BitmapFactory.decodeByteArray( data, 0,
data.length );....................................
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Nov 5, 2010
I've been reading about performance issues decoding Bitmaps and have received the OutOfMemoryError "Bitmap exceeds VM budget" issue when I would expect to not be out of memory and read online that this is a common problem referred to as a bug in the framework by many devs. Typically, I get the error mentioned above on my second pass. Let's say I load a somewhat sizable Bitmap successfully and then recycle it and even set the ref to null. When I call this same method a second time that does the work of loading my Bitmap(s) into memory...
I've read on previous posts here and elsewhere online that there are a few things that can be done with BitmapFactory.Options (for instance, providing an input buffer explicitly). But, before proceeding blindly in using what I've found, I'm hoping someone with more knowledge of these classes can shed a little more light...........
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Aug 18, 2010
In my application I am converting base64 string to image.For that I initially converted base 64 file to byte array and later am trying to convert to images.
To convert to Images I am using the below code
File sdImageMainDirectory = new File("/data/data/com.ayansys.Base64trial");
FileOutputStream fileOutputStream = null;
String nameFile="Images";
try {.......................
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Oct 15, 2010
Our Android app does a lot of image decoding. We fetch a lot of images from the internet, local storage caches, etc. Up to now, these images are being decoded on the UI thread (using BitmapFactory.decodeX() methods). It's been causing some timeout crashes because the UI doesn't respond quickly enough to user input.
I could write a little AsyncTask that encapsulates decoding, but I'm not sure that's a good idea. Spawning threads is expensive, and that would be spawning and tearing down a ton of them. So what's the best way to put this on another thread? Do I need to go to the extent of writing a Service? That seems a little heavy-weight. Are there any solutions for this already out there?
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