解包apk

apktool -r d xxx.apk -o test

重打包apk

apktool b test -o xxx2.apk

apk签名
下载项目的jar包https://github.com/patrickfav/uber-apk-signer/releases

 java -jar uber-apk-signer-1.2.1.jar -a /Users/chennan/Desktop/CXA/dfh2.apk  --allowResign