签名：
jarsigner -verbose -keystore wxmz.jks -signedjar books_encrypted_signed.apk books_encrypted.apk wxmz
最后一项wxmz为keystore别名
字节对齐:
zipalign -v 4 /home/yuzw/Documents/apks/bak/books_encrypted_signed.apk /home/yuzw/Documents/apks/bak/books_encrypted_signed_align.apk
原文：http://my.oschina.net/yzw/blog/362812