I have JKS keystore and I remember the password but not alias.
It's said 'No key found with the alias'.
please help.
If you are using Android Studio, then you can find the key alias like this if you know the password,
Enter your keystore path and password, and tap on the folder icon at key alias section,
You will get the key alias list in new window like this,
You can use existing key, or if you want, you can create new one.