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How Android Re-signs apk

Source: Internet
Author: User
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1. Open the APK file with the compression software, delete the cert.sf and cert.rsa two files in the Meta-inf directory.

2. Use the target system's platform key to re-sign the apk file.

2.1 Key file, the location in the code directory is build\target\product\security under PLATFORM.PK8 and Platform.x509.pem two files.

2.2 Using the system-provided signapk tool to sign, signapk source code is under "build\tools\signapk", in the Out\host\linux-x86\framework directory to obtain the generated Signapk.jar

3. Usage is "Java-jar signapk.jar platform.x509.pem platform.pk8 xxxx.apk outxxxx.apk", it is best to use absolute path to prevent the file name from being found.

How Android Re-signs apk

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