1、查看 keystore
$ keytool -list -keystore debug.keystore
結果：
Keystore type: JKS
Keystore provider: SUN
Your keystore contains 1 entry
androiddebugkey, Mar 21, 2013, PrivateKeyEntry,
Certificate fingerprint (MD5): E0:F4:90:EE:CD:77:17:0E:B8:C4:AC:64:B2:F6:FC:83
2、查看三方應用或是系統應用簽名
用winrar打開待查看的apk，將其中META-INF文件夾解壓出來，得到其中的CERT.RSA文件
$ keytool -printcert -file META-INF/CERT.RSA
結果：
Owner: CN=Android Debug, O=Android, C=US
Issuer: CN=Android Debug, O=Android, C=US
Serial number: 514ab2e1
Valid from: Thu Mar 21 15:12:33 CST 2013 until: Sat Mar 14 15:12:33 CST 2043
Certificate fingerprints:
MD5: E0:F4:90:EE:CD:77:17:0E:B8:C4:AC:64:B2:F6:FC:83
SHA1: 7F:E5:11:D8:37:4F:DA:D7:75:EA:A5:8C:47:06:85:95:6D:1D:3F:2B
Signature algorithm name: SHA1withRSA
Version: 3
3、給空白包簽名
jarsigner -verbose -keystore [keystorePath] -signedjar [apkOut] [apkIn] [alias]
jarsigner命令格式：-verbose輸出詳細信息 -keystore密鑰庫位置 -signedjar要生成的文件 要簽名的文件 密鑰庫文件
keystorePath參數代表keyStore的絕對路徑，如D:\keystore
apkOut參數代表簽名後的apk路徑，如D:\signed.apk
apkin參數代表在騰訊應用中心下載的未簽名apk，默認名稱爲tap_unsign.apk
alias參數代表簽名用的alias名稱（創建keyStore時所填寫），如timdong
$ jarsigner -verbose -keystore debug.keystore -signedjar test2.apk tap_unsign1.apk timdong
Enter Passphrase for keystore:
adding: META-INF/MANIFEST.MF
adding: META-INF/ANDROIDD.SF
adding: META-INF/ANDROIDD.RSA
signing: res/drawable/ic_launcher.png
signing: res/layout/main.xml
signing: AndroidManifest.xml
signing: resources.arsc
signing: classes.dex