I have created a dictionary, currently store data in sqlite, asset folder. But that way, hacker can access to my database easily. I wonder if there any best way to store data in android, especially for dictionary which contains text and image.
You could use SQLCipher to encrypt the database.
More here: SQLEncrpytion
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I am making an Android application and need to decide what type of data storage method to use. The size of the data I need to store is fairly small and therefore I was thinking of storing my data in a JSON format and saving it to a file internally.
I want to protect the data I am storing and was wondering if using an SQLite database adds any additional security in comparison with that a file has? The online Android resources states that both internal file storage and an SQLite Database are only accessible to the application they were created by and doesn't introduce either as being dominant in terms of security. Would anyone be able to help with some useful information?
I am making a dictionary app and need to store and access my data from the app. My goal is to make a completely offline dictionary.
I have all the data needed in JSON format (the file is about 9 MB), so I can convert it into any other format or even into sqlite database.
I try to dig some guides, but it appears to me that Android apps use sqlite only for user data. But I know that there are plenty of other offline dictionaries.
How do they store words and translations internally in the app? And what is the best way to do that?
For the amount of data you need to store, SqlLite is the best option. Sqlite has a wide array of applications in Android apps; their scope is not limited to storing user data. The next best option would be to save the Json in a text file. You can then load the Json data in memory (when the app starts) and transform that to a dictionary structure with the JSON parsers.
Downside of JSON: You need to load your entire stored JSON in memory before parsing it. With 9MB, its not a good idea.
SQLite is the best option if you do not want your 'entire' dictionary in memory at all times and need values only on a look up basis. You also get the full functionality of basic SQL statements with SQLite. Also, there is a lot of SQLite help online; choosing tried and tested technology is always good.
Take a look at the developers website: http://developer.android.com/guide/topics/data/data-storage.html
the scenario is that -- in my application client would make dynamic edit text (of which i m not sure ), but i want to store all the information he creates. All other part have been done.
I just want to know which is the best way to store them in File OR in Database.
As if some says in Database, i want to know how?
and if in File, why?
I will encrypt and decry pt the data too.
Any help would be appreciable.
Thanks in advance.
Store the data in a database. If you're doing Android development, simply use SQLite - http://www.sqlite.org/.
There are many reasons not to store the data on the file system:
It is easier to query a database than a file system. You can quickly and easily answer questions like "How many records do I have?" or "How many items in a given category do I have?"
If you do this in the file system, you'll have to write your own code around querying.
SQLite has strong data types that enforce a schema. If you just write to a file, you'll have to ensure an ID is an integer etc. The database can do this for you.
From my experience when writing files to the file system, I've always ended up with orphaned files. You write them and then forget they are there and they never get deleted. It's annoying. With a database you can easily assess the state of the database and remove old/unused records.
I'm creating a 2d game for Android and i'm using sqlite database for storing game data.Rooted users can change database easily.So i have to encrypt the data and when someone change it i have to understand this.How can i do this?
Take a look to the SQLCipher project. It is an open source library that provides transparent, secure 256-bit AES encryption of SQLite database files.
The web site offers a tutorial for Android.
SQLCipher + user's password could be the right implementation. We need user's password to encrypt the db rather than using the hard-coded strings.
I am currently developing a simple info app on various university campuses. I want the app to operate predominantly in an offline state thus I want to store all my information locally. The data within the app will not be subject to any change thus I was wondering what the best (practice) method was to store such data? Basically should I be storing the info in a SQLite db, java file or xml?
The answer depends on your requirements, but because of the built-in integration with SQLite, the easiest will probably be to just use SQLite, plus you get the benefits of a relational database. You can refer to the Notepad tutorial for a start.
It depends on the data you have. If it is largely text I would store it in an android string resource file. If it is somehow structured and has IDs and relations store it in a database.
We had a University project requiring a local database on an android phone. What whe did was to use SQLite to write on a database stored on the memory stick. (We couldn't find the right permissions to write directly on the file system)
Check the API website for the android.database.sqlite package first.
And here for a nice tutorial :
http://www.devx.com/wireless/Article/40842