Apk signature process introduction [easy to understand]

Hello everyone , I meet you again , I'm your friend, Quan Jun .

actually , Now? Android Development IDE With signature function , But sometimes we may encounter our own signatures apk The scene of , For example, you have an unsigned apk, But you have to adb install To device On , At this time we are adb install You have to deal with this before apk Only after signature processing can install success , This article simply introduces apk Signature process .

1、 Generate signing certificate

Signing requires signing certificate , There are actually many types of signing certificates , Such as jks、keystore etc. , Here to generate keystore As an example to generate a yjing.keystore Sign certificate file .

This paper makes use of JDK Under the keytool Tools to generate keystore file , I believe the configuration is good Android Children's shoes in the development environment should not be encountered keytool The problem that the tool cannot find , The command is directly used here

keytool -genkey -alias keyAlias -keyalg RSA -validity 20000 -keystore yjing.keystore

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The meanings of the above command parameters are as follows ：

-genkey Generate the file

-alias Alias

-keyalg encryption algorithm

-validity The period of validity ( God )

-keystore file name

That's it , We created a yjing.keystore The signature of , In fact, you need to fill in some basic information during the signing process , Just fill in this casually , Then after the signature is successful, you will find the following prompt

You can see keytool The tool is now recommended JKS The signing certificate of , It doesn't matter , Anyway, we have got yjing.keystore 了 （ I made yjing.keystore The file in C://users/ Under the corresponding user name ）.

2、 Yes apk To sign

Yes apk Sign or use JDK Under the jarsigner Tools to carry out , We sign by the following command

jarsigner -verbose -keystore yjing.keystore -signedjar signed.apk unsigned.apk keyAlias

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Let's talk about parameters here -verbose Output signature details

-keystore Keystore location Followed by the signature certificate file path

-signedjar Indicates signing

signed.apk Generated signature file ( When it is not the current path , You need to add a path )

unsigned.apk Indicates an unsigned file

yjing.keystore Sign certificate file

keyAlias Alias when generating signature

The signature can also be successfully generated through the above command apk file signed.apk 了

reference

1、 handy , Teach you how to use the command line to apk Signature 2、 Generate signing certificate keystore

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