About facebook and google+ login 關於Google+以及Facebook第三方登錄實現的一點總結
http://www.cnblogs.com/lngg057/p/5020192.html?utm_source=tuicool&utm_medium=referral
Facebook developer site
https://developers.facebook.com/docs/facebook-login/android/
Facebook get 28 characters hash codes from keystore
keytool -exportcert -alias ucent_alias -keystore ucent_keystore.jks | D:\DevKitTools\openssl\bin\openssl sha1 -binary | D:\DevKitTools\openssl\bin\openssl base64
Note for 64 bit users: this works with version openssl-0.9.8e X64 only do not user with openssl-0.9.8k X64
facebook sdk and samples
https://github.com/facebook/facebook-android-sdk
Step about creating and configuring an app
1. 創建應用，生成應用編號。Create application ID
2. 添加包名和啓動activity
3. 生成key Hashes(Android Studio 直接使用release證書生成key)