Develop Reference

How to increase Image Memory using Bitmap Factory option

I want to use Big Size Image In Back Ground so How Can I do And i want to It's Working For All Device

As per your requirement, I guess that you are getting image from server end. Some time big size Bitmap throw OutOfMemoryException. So do one thing. Use this library to compress image and then show it to ImageView.
https://github.com/zetbaitsu/Compressor
You can also use Library. It provide you facility to fix image size and quality. so it won't be problem for you.
Nostra Image Loader

Fresco. How to get image size without loading full bitmap

I have some local images with unknown size. Format is jpeg.
The task is resize it to fit max size 1280x960 keeping original aspect ratio and save it to new file with low memory consumption. I found out very useful method in Fresco lib: JpegTranscoder.transcodeJpeg() operating streams. It has scaleNumerator param that rules downsampling. How can I get original bitmap size with Fresco without full bitmap loading to memory to calculate scaleNumerator value? Something like inJustDecodeBounds in android BitmapFactory.Options class

You should be able to use Fresco's BitmapUtil.decodeDimensions(...) for this.

Picasso's image loading using fit() method

If I am using Picasso's fit() method in loading images from online, do I have to consider using BitmapFactory.Options.inSampleSize options to reduce the size of an image? I read from other stackoverflow's question (Here) that:
You can also make use of the BitmapFactory.Options.inSampleSize
options to reduce the size of an image while it is loaded, rather than
loading in the entire image and then creating a small copy, which
wastes time and memory.
Do I have to do it after using fit()? Or it is already done by Picasso?
Thanks a lot.

Both fit() and explicit calls to resize() (or resizeDimen) will use inSampleSize automatically when it is appropriate to do so.
Because inSampleSize should be a power of two for best performance and quality, your image needs to be at least twice as large as the target size for this to occur.

Faster image processing

Can someone suggest me a library that can do simplest operations like scale, crop, rotate without loading image fully into memory?
The situation: I need to scale image down from a very large size, but the scaled down image is still too large to be allocated in memory (if we use standard android tools). Since I only need to upload scaled down version, I thought of scaling it through native library and upload it through FileInputStream.
I've tried to use ImageMagic and it does the job, but performance is very poor (maybe there is a way to speed things up?)

Might want to check out OpenCV for Android

You can use the original Android Bitmap functionality by pulling the image into memory but allowing Android to sample the image before it is loaded.
For example:
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 2;
Bitmap myBitmap = BitmapFactory.decodeStream(inputstream,null,options);
This will load your bitmap into memory with half the memory footprint of the full image. You can experiment with changing the inSampleSize to get a good fit for your application.
You can also calculate the sample size on the fly, if you know the final image size you are aiming for, you can get the current file size of the image before you load it into memory and calculate the sample size using the equation inSampleSize = OriginalSize/RequiredSize. Though sample size is best used when it is a power of 2, so you can make adjustments for this.
Edit:
A great example here https://stackoverflow.com/a/823966/637545

Large source ImageView animation

What's the best image file format for Android in terms of memory? PNG is recommended for iOS as xCode does some magic with it.. Is it the same for Android?
I'm currently developing a big app with multiple animations going on (sliding in screens, fading etc etc). All works well so far! However I have noticed the view animation where the view contains an ImageView with a (quite large) PNG as the source is a bit laggy.
Obviously I can make the PNG smaller, but is there anything extra I can do to reduce the amount of memory the ImageView takes up/makes the animation smooth? I know PNG has a much larger file size than JPEG, but I can't see this being a problem, the JPEG or PNG (I assume) is eventually stored as an array of colours, so they would both take up the same memory. PNG is probably better for loading due to less cycles uncompressing. Again I only assume, my knowledge of image file formats is null.
Alternatively is there anything else causing the lag? Is the bitmap scaled to fit the view each onDraw() during the animation so should I scale the bitmap in code before giving it to the ImageView?
Thanks,

The formats supported by Android are: PNG, JPG and GIF (also 9.png).
The recomendated is PNG as said in dev guide
All of them are stored in memory as a Bitmap, so the most important thing is the color deph, like this:
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.RGB_565;
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon, options);
More info: stackoverflow

and add (after honeycomb):
<application
android:largeHeap="true"
...
to your manifest file :=)
thanks to my dear friend :)