File list (Check if you may need any files):
cipher
......\.classpath
......\.project
......\AndroidManifest.xml
......\bin
......\...\cipher.apk
......\...\classes.dex
......\...\edu
......\...\...\buaa
......\...\...\....\sunyu
......\...\...\....\.....\cipher
......\...\...\....\.....\......\AesFileIO.class
......\...\...\....\.....\......\Main$1$1.class
......\...\...\....\.....\......\Main$1.class
......\...\...\....\.....\......\Main$2$1.class
......\...\...\....\.....\......\Main$2.class
......\...\...\....\.....\......\Main.class
......\...\...\....\.....\......\R$attr.class
......\...\...\....\.....\......\R$drawable.class
......\...\...\....\.....\......\R$id.class
......\...\...\....\.....\......\R$layout.class
......\...\...\....\.....\......\R$string.class
......\...\...\....\.....\......\R.class
......\...\resources.ap_
......\default.properties
......\gen
......\...\edu
......\...\...\buaa
......\...\...\....\sunyu
......\...\...\....\.....\cipher
......\...\...\....\.....\......\R.java
......\res
......\...\drawable-hdpi
......\...\.............\icon.png
......\...\drawable-ldpi
......\...\.............\icon.png
......\...\drawable-mdpi
......\...\.............\icon.png
......\...\layout
......\...\......\main.xml
......\...\values
......\...\......\strings.xml
......\src
......\...\edu
......\...\...\buaa
......\...\...\....\sunyu
......\...\...\....\.....\cipher
......\...\...\....\.....\......\AesFileIO.java
......\...\...\....\.....\......\Main.java