You will not be able to buy cryptocurrency via banks or e-wallets etc. in India anymore as Reserve Bank of India (RBI) has banned them with immediate effect from "dealing with or providing services to any individuals or business entities dealing with or settling virtual currencies".
RBI in its first bi-monthly monetary policy has announced that any entity regulated by them such as banks, wallets etc. shall not deal with or provide services to any individual or business entities for buying or selling of cryptocurrency such as bitcoins. If banks, e-wallets and any other entities regulated by RBI are not allowed to facilitate sale or purchase of cryptocurrencies, obviously individuals will not be able to transfer money from their bank accounts to their crypto-trading wallets