EvernoteClient

Example of Evernote Android client using a Clean Architecture

This client uses Evernote Sandbox API. For use this application you have to login using a Evernote Sandbox account https://sandbox.evernote.com.

Architecture

The project is developed using MVP (Model View Presenter) and Clean Architecture.

Data source

On first attempt, I tried to get data using the public Evernote Cloud API, but the oficial documentation is not available anymore (http://dev.evernote.com/documentation/cloud/).

So, in this project I've used Evernote SDK for Android as data source (https://github.com/evernote/evernote-sdk-android).

Features

Login

Evernote uses OAuth 1.0 as authentication system (https://dev.evernote.com/doc/articles/authentication.php). So, I couldn't develop my own view where the user can write his own credentials, instead I had to launch a WebView, wait for the user to write credentials and accept permission and then receive back the obtained token using an android scheme.

On the first attempt, I did this login system by myself, it's pushed in cloud-api-login branch. But then, I noticed that I can't use the Evernote Cloude API because the documentation is not available, so I had to use the authentication system which is included in Evernote SDK for Android.

List notes

Notes are obtained by NoteStore.findNotes method, then for each note there is a call to NoteStore.getNote in order to obtain note contents.

Notes are listed in a RecyclerView using a GridLayoutManager with 2 columns.

Sort notes

List notes view has a option menu which provides the user the option of sort the notes using date or title. This sort algorithm is used implementing Comparator interface (comparator implementations) with Collection.sort method.

Note details

When a note is tapped in list notes view, a new view is opened which shows more information about the note, like author and creation date.

Add note

There is an option to add new note where user can write title, content and author. Notes are added using NoteStore.createNote method.

Handwriting new note

Also, new notes can be written by handwriting.

As draw panel I've developed a custom dialog with a custom view where user can draw and when OK button is pressed, generated bitmap is sent back to the activity who call the dialog. Obtained bitmap is sent to an OCR engine, which reads text and then obtained text is written in focused EditText.

I've added Tesseract as OCR engine https://code.google.com/p/tesseract-ocr/ with eng language by default. But this language doesn't detect most handwriting letter. I can train a handwriting language using TrainingTesseract3 but it isn't easy and takes time.

What should be implemented

• Instrumentation tests
• UI tests
• Trained handwriting tesseract language
• More beautiful UI
• Better error handling
• ENML markup parser
• Logout feature