You can't restore chat history from one platform to a different platform.
Eg:- Window to Android or vice-versa as in your case. Read the below Whatsapp faq,
You cannot restore chat history from any other phone type to Windows
Phone, or from Windows Phone to another phone type.
The Whatsapp for Symbian S60 OS creates backup file as
.bak files and Whatsapp on Android OS creates backup files as
.crypt files(encrypted). So based on this article from Whatsapp on How to save and restore chat history backups. The instructions are given only for
- transferring backups from S60 to S60 phone
- Backup files are saved in a folder called ‘wa’ and are called MsgStore.bak which will not be recognized by the Whatsapp application in your Android phone.
- Backup files are saved in a format to be opened with WhatsApp. If you want to read your conversations on your computer you can send them as .txt file from WhatsApp to your email.
What you are trying to do is export the chat history. And from this Whatsapp article on How do I export my chat history?,
You can't use this
.txt file for importing into another phone. So What you do is only for exporting the chat and you can only be able to read it using a text editor.
it is not possible to restore your chat history from this exported