Develop Reference

Android: Animated gif image resize in kmagick

I am using kmagick for resizing gif images in android. It works fine for static but gives incorretc output for gif or animated webp files.
Magick.initialize().use {
val wand = MagickWand()
// getting image
wand.readImage(src)
// resizing image
wand.resizeImage(512,512,FilterType.UndefinedFilter)
// Saving image
wand.writeImage(dst)
promise.resolve("Done at ${dst}")
}
Input: (animated gif having multiple frames)
Output: I think its single frame and that also messed up but resizes according to input for height width.
Whats happening here. How to fix it?

Just want to reference for future, this was already answered in
https://github.com/cherryleafroad/kmagick/issues/3#issuecomment-1068044815
Anyways, to sum up what's going on,
Gifs are able to save the difference between frames to save space.
It's due to the way gif images work. Because the cli uses the api in a certain way, and kmagick bindings are only direct bindings to the c api, if you want to achieve the same results that the cli does, you have to use the api in the same way. (kmagick isn't doing anything to the image, it's imagemagick that's doing it; so it's more relevant to check imagemagick api docs / ask them so you can do it in the same way and get the same results).
I'm not sure what imagemagick api they're using off the top of my head however to achieve those results, but I think that doing something like extracting each frame individually then resizing them one by one would solve it.

Android how to load Image file with different extension using Picasso

This is a different situation. I want to load a image file which has stored with different extension like 'photo.xyz' instead of 'photo.jpg or photo.png' using Picasso. to avoid image from gallery i am storing image like this. Please help me is there any option to show like this.

Neither Picasso nor Android (which does the actual image decoding) cares what the file name is. It can be anything. The type of the image is always determined from the first few bytes of the actual image data.

As a small workaround you can programmatically put .nomedia file into your app folder to prevent images to be cached by mediaserver and displayed in a Gallery app.

How to capture bitmap image from video

i am using SurfaceView for play video and i want to get image from running video, i have tried with getDrawingCache() but i am getting blank image or Black screen but when i draw image of any other layout which dont have video then this is working fine,
so please anybody can solve this issue that How to get bitmap images from video or surfaceView. Thanks in advance please answer my question if you know.
I have used this code but not getting result.
mVideo.setDrawingCacheEnabled(true);
mVideo.buildDrawingCache();
Bitmap b = mVideo.getDrawingCache();

This won't work because the video content is not "exposed" to the normal view layers.
If you are using API Level >= 10 you can use MediaMetadataRetriever getFrameAtTime. It's described here.
Even this may not return the exact frame as it is fairly hardware dependent.
The most sure way to do this is to use something like FFMPEG to access the stream yourself.

Why would android forget some assets?

My Problem: Only one image will actually load from the assets folder. I have all the images there and when I try to access any of them I don't get an error. By actually load I mean it shows the image on the screen. When I load the other images the whole screen comes up white.
In every instance I am loading the whole image to the whole screen.
If I were to put the image as a fourth its size in the middle of the screen then there is a white rectangle there. The image is supposedly in the .apk because I don't get an error for the game trying to find it. However if I were to load this one image then everything words fine.
The one image that works find is a .png image and I tried to load the others as a .png but it does not work.
Any advice on where to start?
I load the images through the AssetManager.readAsset() as an input stream and then use the bitmap factory to get the image as a bitmap. Afterwards I load the bitmap into open gl and draw the region I want. However, the problem is only my first image I ever started using works at the moment. Could there be something wrong with a file that eclipse generates?

Some png bug android.
Just try to open them and save them with gimp. Sometimes it solves the problem.

Finally found the solution.
Turns out that one image that worked had a bit depth of 32 and the other ones only had a 24 bit depth.
The solution is to open up the image in gimp, add an alpha channel (makes it 32 bit), and save it as a .png file. Then read the details and it should say it is 32 bit.
Thanks guy! :)
Also note that images have to be by power of 2. For example it needs to be 1024 by 1024.

Android smooth image animation

I am working on image animation. I have 200 transparent png images which I am trying to show one by one over a background image.
Can you tell me the best way to do it. The image should change in such a way that it should appear that a cartoon is running.
If you can tell me in steps, it will be great.

Have a look at animation frames: http://developer.android.com/guide/topics/resources/animation-resource.html#Frame

You can use animation-list to play them frame by frame
http://app-solut.com/blog/2011/05/playing-animations-in-android/
or create a GIF and play it
http://droid-blog.net/2011/10/14/tutorial-how-to-use-animated-gifs-in-android-part-1/
Gif is more lightweigt, but it gave me trouble once when played on some MDPI screen devices, where I had a single Gif file in the drawable-hdpi folder. So give it a try first..