Google Drive on Android Only Edits Google Docs? Really?

Someone, please tell me I am wrong. I use DropBox to keep all my text notes synched and to edit them on my Android phone. I copied all my text notes to Google Drive and could not edit them on Android. I could open them with a third party editor (just like DropBox), but got an Access Denied error when I tried to save them. Do I really need to convert all my text files to Google Docs format to edit files in Google Drive on Android?

[Edit. It seems that I can only edit these new notes on my desktop using a browser and Google Docs. It takes about 60 seconds from double-clicking the doc in the Drive folder to editing the Doc in the IE browser. This is a step back from opening a text file immediately from DropBox into Notepad.]
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