I am looking for a simple way to create an animated GIF in a native Android application. The source files should be JPEG (from camera or what ever) and the output should be saved as GIF on the device.
I do not want to know how to play animations or animated GIF files.
To be clear: I want to know how to put single images frame by frame into a "movie" and then save it as a .gif file.
e.g. This App can do want I want to do.
No, the JPEG file format has no inherent support for animation. The image you linked is actually an animated GIF disguised with a jpg file extension.
See this solution.
https://github.com/nbadal/android-gif-encoder
It's an Android version of this post.
http://www.jappit.com/blog/2008/12/04/j2me-animated-gif-encoder/
To use this class, here is an example helper method to generate GIF byte array. Note here the getBitmapArray() function is a method to return all the Bitmap files in an image adapter at once. So the input is all the Bitmap files in one adapter, the output is a byte array which you can write to the file.
public byte[] generateGIF() { ArrayList<Bitmap> bitmaps = adapter.getBitmapArray(); ByteArrayOutputStream bos = new ByteArrayOutputStream(); AnimatedGifEncoder encoder = new AnimatedGifEncoder(); encoder.start(bos); for (Bitmap bitmap : bitmaps) { encoder.addFrame(bitmap); } encoder.finish(); return bos.toByteArray(); }
To use this function, do the following then you can save the file into SDcard.
FileOutputStream outStream = null; try{ outStream = new FileOutputStream("/sdcard/generate_gif/test.gif"); outStream.write(generateGIF()); outStream.close(); }catch(Exception e){ e.printStackTrace(); }
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