APK 签名

https://www.cnblogs.com/gengzhaoyun/p/7607751.html  apk增加系统签名的方法

https://blog.csdn.net/xiaoyi_tdcq/article/details/79272047   android系统签名

https://blog.csdn.net/chenzhen1080/article/details/78990353   如何获得系统权限--解决no conscrypt_openjdk_jni in java.library.path错误

java -Djava.library.path=. -jar signapk.jar platform.x509.pem platform.pk8 app.apk app_sign.apk