'keytool' is not recognized as an internal or external command,operable program or batch file.

在獲取SHA1碼是遇到這個問題，
解決方案：
手動定位到keytool所在目錄：

C:\Program Files (x86)\Java\jre1.8.0_191\bin> .\keytool -list -v -keystore "C:\Users\doudou\.android\debug.keystore" -alias androiddebugkey -storepass android -keypass android