在Android8.1上面继续参考http://blog.sina.com.cn/s/blog_3e4774e30101e1y5.html这篇文章来对APK进行Android系统源码环境下的签名，发现签名时出现如下错误：
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.conscrypt.OpenSSLBIOInputStream.(OpenSSLBIOInputStream.
at org.conscrypt.OpenSSLX509Certificate.fromX509PemInputStream(OpenSSLX509Certificate.
at org.conscrypt.OpenSSLX509CertificateFactory$1.fromX509PemInputStream(OpenSSLX509CertificateFactory.
at org.conscrypt.OpenSSLX509CertificateFactory$1.fromX509PemInputStream(OpenSSLX509CertificateFactory.
at org.conscrypt.OpenSSLX509CertificateFactory$Parser.generateItem(OpenSSLX509CertificateFactory.
at org.conscrypt.OpenSSLX509CertificateFactory.engineGenerateCertificate(OpenSSLX509CertificateFactory.
at
at com.android.signapk.SignApk.readPublicKey(SignApk.
at com.android.signapk.SignApk.main(SignApk.
Caused by: java.lang.IllegalArgumentException: Failed to load any of the given libraries: [conscrypt_openjdk_jni-linux-x86_64, conscrypt_openjdk_jni-linux-x86_64-fedora, conscrypt_openjdk_jni]
at org.conscrypt.NativeLibraryLoader.loadFirstAvailable(NativeLibraryLoader.
at org.conscrypt.NativeCryptoJni.init(NativeCryptoJni.
at org.conscrypt.NativeCrypto.(NativeCrypto.
... 9 more
查了下资料，需要将命令由如下：
java -jar out/host/linux-x86/framework/signapk.jar build/target/product/security/platform.x509.pem build/target/product/security/platform.pk8 xinu.apk xinu_new.apk
修改为：
java-Xmx2048m -Djava.library.path="out/host/linux-x86/lib64"-jar out/host/linux-x86/framework/signapk.jar build/target/product/security/platform.x509.pem build/target/product/security/platform.pk8 xinu.apk xinu_new.apk
参考资料：https://ask.csdn.net/questions/684938
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