Android Application signature Problems

I. signature code (first configure the jdk path, keytool and jarsigner are both java class libraries) 1. generate the signature file keytool-genkey-alias MyFirstApp. key store-keyalg RSA-validity 40000-keystore MyFirstApp. keystore2. apply the signature file to the file signature jarsigner-verbose-keystore MyFirstApp. keystore-signedjar MyFirstApp_signed.apk MyFirstApp.apk MyFirstApp. keystore (note: the apk file cannot be installed normally after jdk7 is signed. Add the following parameter-digestalg SHA1-sigalg MD5withRSA in the signing program jarsigner. parameter description 1. keytool usage: -certreq [-v] [-protected] [-alias <alias>] [-sigalg <sigalg>] [-file <csr_file>] [-keypass <keystore password>] [-keystore <keystore>] [-storepass <keystore password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-changealias [-v] [-protected]-alias <alias>-destalias <target alias> [-keypass <keystore password>] [- keystore <keystore>] [-storepass <keystore password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [- providerarg <parameter>]... [-providerpath <path list>]-delete [-v] [-protected]-alias <alias> [-keystore <keystore>] [-storepass <repository password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-exportcert [-v] [-rfc] [-protected] [-alias <alias>] [-file <authentication file>] [-keystore <keystore>] [-storepass <keystore password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-genkeypair [-v] [-protected] [-alias <alias>] [-keyalg <keyalg>] [-keysize <key size>] [-sigalg <sigalg>] [-dname <dname>] [-validity <valDays>] [-keypass <keystore password>] [-keystore <keystore>] [- storepass <repository password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-genseckey [-v] [-protected] [-alias <alias>] [-keypass <keystore password>] [-keyalg <keyalg>] [-keysize <key size>] [-keystore <keystore>] [-storepass <repository password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-help-importcert [-v] [-noprompt] [-trustcacerts] [-protected] [-alias <alias>] [-file <Authentication file>] [-keypass <keystore password>] [-keystore <keystore>] [-storepass <keystore password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-importkeystore [-v] [-srckeystore <source keystore>] [-destkeystore <target keystore>] [-srcstoretype <source storage type>] [-deststoretype <target storage type>] [-srcstorepass <source Database Password>] [-deststorepass <target database password>] [-srcprotected] [-destprotected] [--destprotected] srcprovidername <source provider name>] [-destprovidername <target provider name>] [-srcalias <source alias> [-destalias <target alias>] [-srckeypass <source keystore password>] [-destkeypass <target keystore password>] [-noprompt] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-keypasswd [-v] [-alias <alias>] [-keypass <old keystore password>] [-new <new keystore password>] [-keystore <keystore>] [-storepass <keystore password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-list [-v |-rfc] [-protected] [-alias <alias>] [-keystore <keystore>] [-storepass <repository password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [-providerarg <parameter>]... [-providerpath <path list>]-printcert [-v] [-file <authentication file>]-storepasswd [-v] [-new <new repository password>] [- keystore <keystore>] [-storepass <keystore password>] [-storetype <storage type>] [-providername <Name>] [-providerclass <provider Class Name> [- providerarg <parameter>]... [-providerpath <path list> 2. jarsigner usage: [Option] jar file alias jarsigner-verify [Option] jar file [-keystore <url>] keystore location [-storepass <password>] password for keystore integrity [-storetype <type>] keystore type [-keypass <password>] private key password (if different) [-sigfile <File>]. SF /. name of the DSA file [-signedjar <File>] Name of the signed JAR file [-digestalg <algorithm>] Name of the digest algorithm [-sigalg <algorithm>] Name of the signature algorithm [-verify] verifies the signed JAR file [-verbose] and outputs detailed information during signature/verification. [-certs] outputs detailed information and displays the certificate during verification. [-tsa <url>] location of the timestamp institution [-tsacert <alias>] Public Key Certificate of the timestamp institution [-altsigner <class>] Name of the signature mechanism class [-altsignerpath <path list>] The Position of the alternative signature mechanism [-internalsf] is included in the signature block. SF file [-sectionsonly] does not calculate the hash of the entire list [-protected] keystore protected authentication path [-providerName <Name>] provider name [-providerClass <class> encryption service provider name [-providerArg <parameter>]... main class file and constructor Parameters