java -jar signapk.jar platform.x509.pem platform.pk8 unsignDemo.apk signedDemo.apk
signapk.jar : out/host/linux-x86/framework/signapk.jar
platform.x509.pem: build/target/product/security/platform.x509.pem
platform.pk8: build/target/product/security/platform.pk8
或者直接在android源码编译环境执行
java -jar out/host/linux-x86/framework/signapk.jar build/target/product/security/platform.x509.pem build/target/product/security/platform.pk8 app.apk app_signed.apk