Manji is an mobile application built to help people learning Japanese learn about Kanji.

Last update: Dec 19, 2022

Overview

Manji

On the surface, Manji is just a Japanese dictionary, but it can actually do more than that:

Handwritten kanji recognition
Image kanji extraction
Kanji card
Kanji quiz generated dynamically based on selected groups of kanji

Therotically, Manji is cross-platform since it is powered by Flutter, but since I want to maximize the elegance of its user experience and also because I am an Apple fanboy to some degree, I chose to focus on the iOS side. I have already forgotten when the last time was that I debugged and tested on Android but feel free if you want to make it work and optimize for Android.

Getting Started

Because the dictionary file exceeds the size limit of Github, git-lfs is used for storing the dictionary file. So make sure you have installed git-lfs.
Clone this project and run git-lfs fetch --all in the project root folder.
Create a service account.
Fill up the credential as shown below and save it as google_api_credentials.dart and move to Manji/lib/resource/.

import 'package:googleapis_auth/auth_io.dart';

final credentials = ServiceAccountCredentials.fromJson(r'''
{
  "type": "service_account",
  "project_id": "",
  "private_key_id": "",
  "private_key": "-----BEGIN PRIVATE KEY-----\n-----END PRIVATE KEY-----\n",
  "client_email": "",
  "client_id": "",
  "auth_uri": "",
  "token_uri": "",
  "auth_provider_x509_cert_url": "",
  "client_x509_cert_url": ""
}
''');

Setup Firebase for your project.
(iOS) Download your GoogleService-Info.plist and move it to Manji/ios/Runner/.
(Android) Download your google-services.json and move it to Manji/android/app/.
Run the project using flutter run.

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Comments

Unable to run the app locally due to database not copying properly to my device

Hey! I've been trying to build the app locally (parts of which led to #15) but there is one issue that I haven't been able to resolve yet and you might be able to help me with this.

Whenever I run the app (the version I've built myself) on my smartphone (or an Android emulator) I get the following exception:

Unhandled Exception:
DatabaseException(no such table: Kanji (code 1 SQLITE_ERROR): ,
while compiling: SELECT * FROM Kanji) sql 'SELECT * FROM Kanji' args []}

After checking the local database that gets installed on my device I can confirm that its pretty much empty (like a newly initialized sqlite DB) so this error is kinda obvious. My first thought was something along the lines of "Oh well, maybe I did something wrong with the git LFS step" but sadly the database that I have on my PC in data/dictDB.db is correct (as in it does have the required tables/data). So my assumption is that somehow it doesn't seem to copy the SQLite database that I have in data/ to my device (nor the emulator) and I think it does instead initialize a new one, which then causes the prior exception due to the data not being present.

Full "flutter run -d DEVICE_NAME" log (click to expand)

Launching lib\main.dart on DEVICE_NAME in debug mode...
Running Gradle task 'assembleDebug'...
Running Gradle task 'assembleDebug'... Done                        62.5s
√ Built build\app\outputs\flutter-apk\app-debug.apk.
Installing build\app\outputs\flutter-apk\app.apk...                13.5s
I/flutter (30066): copying
I/flutter (30066): opening
I/flutter (30066): upgrading
I/flutter (30066): [{type: table, name: android_metadata, tbl_name: android_meta
data, rootpage: 3, sql: CREATE TABLE android_metadata (locale TEXT)}]
E/flutter (30066): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Except
ion: DatabaseException(no such table: Kanji (code 1 SQLITE_ERROR): , while compi
ling: SELECT * FROM Kanji) sql 'SELECT * FROM Kanji' args []}
E/flutter (30066): #0      wrapDatabaseException (package:sqflite/src/exception_
impl.dart:11:7)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #1      SqfliteDatabaseMixin.txnRawQuery.<anonymous closure>
(package:sqflite_common/src/database_mixin.dart:406:30)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #2      BasicLock.synchronized (package:synchronized/src/basi
c_lock.dart:33:16)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #3      SqfliteDatabaseMixin.txnSynchronized (package:sqflite
_common/src/database_mixin.dart:346:14)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #4      DBProvider.getAllKanjis (package:kanji_dictionary/res
ource/db_provider.dart:131:15)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #5      KanjiBloc.getAllKanjis.<anonymous closure> (package:k
anji_dictionary/bloc/kanji_bloc.dart)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066):
I/flutter (30066): opening
E/flutter (30066): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Except
ion: DatabaseException(no such table: Kanji (code 1 SQLITE_ERROR): , while compi
ling: SELECT * FROM Kanji) sql 'SELECT * FROM Kanji' args []}
E/flutter (30066): #0      wrapDatabaseException (package:sqflite/src/exception_
impl.dart:11:7)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #1      SqfliteDatabaseMixin.txnRawQuery.<anonymous closure>
(package:sqflite_common/src/database_mixin.dart:406:30)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #2      BasicLock.synchronized (package:synchronized/src/basi
c_lock.dart:33:16)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #3      SqfliteDatabaseMixin.txnSynchronized (package:sqflite
_common/src/database_mixin.dart:346:14)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #4      DBProvider.getAllKanjis (package:kanji_dictionary/res
ource/db_provider.dart:131:15)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066): #5      KanjiBloc.getAllKanjis.<anonymous closure> (package:k
anji_dictionary/bloc/kanji_bloc.dart)
E/flutter (30066): <asynchronous suspension>
E/flutter (30066):
Activating Dart DevTools...                                         7.6s
Syncing files to device DEVICE_NAME...                                   140ms

I've invested some time trying to figure out why this doesn't work, but sadly couldn't find a solution yet and I hope that you might know how to resolve this :).

bug

opened by atomicptr 11

Endless loading

when the application starts, it is always loaded. Android. when debugging, the last message he got stuck on E/ (17598): [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008] E/ (17598): [ZeroHung]zrhung_get_config: Get config failed for wp[0x0008]

opened by Taverz 7
Improve "Getting started" section in the README

Super trivial changes, I removed some ignored files that you probably accidentally checked in and expanded the getting started section a bit. I've never used Firebase before so it was a bit of a struggle (and some Googling) to get it running. I've added some extra documentation for that (also included some Android specific bits) which should make this step a bit easier for someone else who has never done any Firebase stuff before :).

opened by atomicptr 1
Siri suggestions doesn't work anymore.

Siri suggestions does not seem to work any more. I will either drop the whole flutter_siri_suggestion package or create my own branch to further investigate the issue.
bug

opened by Livinglist 0

Manji is an mobile application built to help people learning Japanese learn about Kanji.

Related tags

Overview

Manji

Getting Started

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Comments

Unable to run the app locally due to database not copying properly to my device

Endless loading

Improve "Getting started" section in the README

Siri suggestions doesn't work anymore.

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