Performance optimized APK slimming

Basic slimming

1. Tools （Lint Test code ）

arrow 1： Comprehensive testing
Examine dimensions ：
Daniel's article ：
https://www.cnblogs.com/andy-songwei/p/7090934.html
http://www.javashuo.com/article/p-vtcbvgwr-nc.html
arrow 2： According to the specific test type lint

2. The image processing ：

1. Picture compression
Batch compression is recommended （ The use of plug-in ：TinyPngPlugin）
1、Tools --> TinyPngPlugin
2. use WebP Format
3. Confusion handling minifyEnabled true
4. Resource reduction shrinkResources true

Note if there are some resource files that are not sure to use , I dare not delete , Or not sure if the requirements will change , So keep it first ,
have access to shrinkResources To reduce resources

5. Useless so file , Three party Library , Two party Library , And the deletion and reduction of reusable third-party libraries

6. In order to solve the complex tripartite library introduced by simple functions , Try to refer only to their implementation , Avoid introducing third-party libraries

7. Remove unused spare resources
defaultConfig { resConfigs(“en”,“zh”,“zh-rCN”) } The same goes for resource files

defaultConfig { resConfigs(“xxhdpi”,“xxxhdpi”) }

Slimming advanced

1. Resource confusion resources.arsc Resource confusion

Reference resources AndResGuard

2.ReDex

dex Files are the product of packaging ,redex yes facebook Open source subcontracting optimization scheme . You can refer to ：ReDex.

3.so Dynamic loading

about so After reduction ,so The proportion of documents is still relatively large , Other than the first start-up can be considered so Dynamic distribution of documents . That is, the idea of plug-in , Load on demand , But while the benefits are great , There's also a lot of risk ,

There's a lot of case Need to take into account , For example, download time 、 The network environment 、 Thread process , If loading fails, whether there is a degradation strategy, etc .

You can refer to facebook Open source SoLoader.

4. pluggable

Load on demand , The greater the return, the greater the risk , The risk is the same as above. .

5. Native switch to H5 Or small programs

6. Picture networking

Upload the picture to the server , Reduce the package volume through dynamic download , The disadvantage is that the first load depends on the network environment , For loading speed , The flow needs to be balanced . Pictures can be preloaded , But traffic consumption is unavoidable , If you care about traffic indicators , It needs to be weighed .

7.DebugItem

DebugItem It mainly contains two kinds of information ：

Debugging information . Parameter variables and all local variables of the function .
Troubleshooting information . Correspondence between all instruction set line numbers and source file line numbers .
Remove debug Information and line number information , If not the ultimate , Not recommended . You can refer to this article by Alipay. Alipay App Build optimization resolution ：Android Package size is extremely compressed .

8.R Field inline

inline R Field Can solve R Field Too much leads to MultiDex 65536 The problem of , And this step can play a significant effect on code downsizing .
Reference bytes are open source shrink-r-plugin, And Didi's open source booster, Meituan scheme

9. Picture shader

Processing for different colors in the same image , have access to tint, For example, it was originally a black return icon, Now the other page is going to be white , You don't need two pictures ,
But use tint To change it to white .

10. Reduce ENUM Use

Every time you cut one ENUM Can be reduced by about 1.0 To 1.4 KB Size .

The idea of reducing body size ：

Packet volume monitoring

Package volume monitoring should be a part of the release process , It's best to be a platform 、 Process , Otherwise it will be difficult to continue , In a few versions, the package volume has risen again .

General idea ： Compare the package size of the current version with that of the previous version , exceed 200KB Approval required . For temporary approval, follow-up optimization schemes need to be given .