Prevents malicious apps that are not signed by the developer certificate from overwriting the app.Ĭan be used to verify the integrity of the APK file and send it to the server for verification. Signature file storage location: After extracting the APK file, there is a signature file in the META-INF directory. Install and open the 'APK Check Digital Signature' program, click 'menu', select 'text' view mode to view the signature information.ġ. Signatures are signed by default using 'AndroidDebug Certificate' jarsigner -verify -verbose -certs xxx.apk Repackage: java -jar /Users/lin/Downloads/apktool.jar b /Users/lin/Downloads/outĭecompress the apk file to get dex, and treat dex through to get the jar (you can see the java code) (You can modify the image resource and other files) Where *.apk is the unpacked APK file name and out is the output directory name Unpacking APK apktool d -f /Users/lin/Downloads/j.apk -o /Users/lin/Downloads/out

Keytool (android-platform-tools contains keytool) Apktool (install brew install apktool via brew) This type of communication is mostly done under a USB cable, but it also supports Wi-Fi connections.Īdb can also be used to communicate with the Android emulator running on your computer.Īdb facilitates Android development and security research.

The Android Debug Bridge (Adb) helps communication between Android devices and personal computers. Introduction to ADB (android-platform-tools includes ADB)

Install the Android Platform Toolset with Homebrew brew cask install android-platform-tools

Homebrew install adb