How to reduce App (.apk) Size
When I install my app on the phone to test, it is showing up to be a HUGE size, 11.35 MB. It is a very simple app that lets user browse through fun-facts. The only reason I can think of is that there are 14 JPEG files in the drawables which serve as background images of the fun-facts. The average size of these is about 500 KB.
I’d like to trim the size of my app, so as not to use up the precious resources on the user’s device. Other than just getting rid of the pictures, are there ways to optimize the size of apk file?
EDIT: The pictures are photos taken by me using the Android phone itself.
18 Solutions collect form web for “How to reduce App (.apk) Size”
I would recommend that you compress the
.jpg files as much as possible, this should greatly reduce the size of your
.apk file. A tool such as Paint.NET which is free should help you do this. It has great resizing options.
Other answers mention shrinking images. You might also consider trying ProGuard to shrink your bytecode. Here’s an article on applying ProGuard to an Android app.
Make sure that your jpg’s aren’t stored in any higher resolution than necessary. A nice Android phone has a screen resolution of 1920×1200 or 2560×1440 (circa 2015)
800 x 480 , so your backgrounds shouldn’t contain any more pixels than that (unless your app supports some kind of zooming). Also, are the backgrounds photographs? If not, you may find that using a vector based image format like svg, or one with a dynamic palette like gif, will reduce the file size even more.
With the introduction of Support Library 23.2, now you can replace many of your Image assets with SVG ( w/ or w/o animations) to reduce the apk size further.
This could be a late reply but might be helpful for future users.
Refer this link.
To summarise the page, it mentions below key points that will help reduce the apk size in totality:
- Use ProGaurd
- Remove any debug info you have in the app ( statements such as Log.i()). They can be wrapped in a condition which is only enabled while testing out the application.
- Use recommended media formats
- Image: PNG orJPG
- Audio: AAC
- Video: H264 AVC
- Compress images using OptiPNG or PNGCrush
- Use 9patch to scale images
- Find unused resources using this tool and remove them.
- Avoid using multiple resources to achieve the same functionality. The resources do not only limit to images but extend to APIs. At times a singular API can provide multiple results instead of using two or three different APIs. Duplicated strings and assets are also a waste of space.
Beyond optimizing images, I also found it useful to verify the Support Libraries you use. I have a relatively simple application targeting platforms with API >=10, still my APK ended up being 2.2M, or after using ProGuard, 1.4M. When I looked into the APK, the code was 1.5M and there were a lot of additional resources included (abc_*) I knew nothing about.
Then I found this: https://developer.android.com/tools/support-library/features.html
Turns out I did not need appcompat-v7, only support-v4, and making this change to my dependencies reduced the APK size to 1.7M (0.9M with ProGuard).
Understandably, the Support Libraries carry a lot of extra (code and resource), so making sure you use only the ones you need might help.
(Even though -0.5M is not significant for a 11M app, I am posting this here because I kept ending up on this page while searching for a solution…)
- Use tinypng compress your project’s png or
jpg format image files, It can greatly reduce the size of the image
without loss in image quality；
- Some images use tinypng compress may distortion, you can convert
these images to webP format, use 智图 or
iSparta can convert other format to webP;
- Use Lint check no use resources and delete it;
One more thing to add on image file size – different algorithms can have a significant effect on the final size. I found that Yahoo’s http://www.smushit.com is a lot more effective (at least for .png) than compressors and codecs I have on my computer right now.
There are two things I can point out from experience.
- If you use eclipse to create apk file then the resources are duplicated (atleast it happened in my case), you can try using ant and build.xml to create the apk and compare the size.
- Also look into aliasing the resources. The link for it is here.
I know i am late here to answer this question but i reduce my app size using below techniques so i want to share these things with all.
1)- Use WebP images instead of Jpeg images, it will provide huge impact on apk size if you are using multiple images.
2)-Use VectorDrawables if you are using simple small icons in your app.
3)- Use View’s tint property in xml to avoid multiple same icons but Different in color.
search DrawableTint and TintableImageview
4)- Use 9-patch images and avoid duplication of image or anything in the app code.
Below are the links to refer to reduce APK size.
I think this post would give you a better idea on all the possible methods to use to reduce your apk size by a huge margin.
I will give you an excerpt of the same.
- Use only the required libraries from Google Play Services.
- Apply ProGuard to your app.
- Minify and shrink.
- Adopt vector drawables.
- Use the android lint.
- Split your apk based on the architectures
- Adding resConfigs in your gradle files to specify localization languages.
This strips away all other string files that could’ve been added by other libraries in languages you don’t even support.
Here is what you can do for reduce build size by Images (Also can work for iOS)
Here I am sharing the great tool called “OPTIPNG ” (you can download from here )which will help us to reduced the build specially by using Images, It will reduced the Image size for PNGs we are using without degrading quality (Resolution and color) of the image.
Example – If your image size is off 698 KB then It will simpley reduced size to 564 KB
Here is the execution steps for OPTIPNG 0.7.5
1) Terminal -> CD /YourLocal path of OPTIPNG
2) type “./configure”
3) type ”sudo make install”
Intallation should be done now
4) type ” optipng /your image path
You will get result in byte and can also check your size
You could also try http://www.webresizer.com/resizer/ Its an online tool, Did a pretty good job for me.
I used Trimage image compressor for compressing images and reducing the size of apk.It has good compression rate,easy to use,retains the quality of image and is also available in Ubuntu.Beside this i enabled ProGuard and worked on Lint issues to reduce APK size.
Following are the ways to reduce the app size. In detail is explained in the following link.
Optimize png images
Remove unused resources
Compress Jpeg images
Remove debug information
Use lint extensively
Reuse resource whenever possible
Recommended Media formats
You can reduce apk size by del R.class and replaces the reference to constant.
APK contains a zip file of all the things that your mobile application has including Java class files, resource files among others.
One of the simple ways to make your APK smaller is to reduce the number and size of the resources it contains. In particular, you can remove resources that your app no longer uses, and you can use scalable Drawable objects in place of image files.
WebP image format: provides lossy compression (like JPEG) as well as transparency (like PNG) but can provide better compression than either JPEG or PNG
Convert images to WebP
use SVG images instead of jpg in order to reduce the apk size.
put your image files in the database .. so that the users of your app can download it from the database and it will reduce the app size dramatically..