I have my pictures saved in a package in the res folder.
I want to link these pictures to entries in my sqlLite database.
What is the best way to do this?
what should I save in the database to get this picture and how to access it?
Simply use the incremental ID you use for the row in your database as name for your image, you can keep track of the original filename in your database if you want it for further use, like user downloading and so on.
Using this technique, you're sure not to have files with the same name.
You can store the images without file extension if you want.
Related
Lets say I have an App that allows me to rate mugs. Therefore, I enter some rating criterias, take a Picture of the mug and then save it to a DataBase, to look at it later.
At the moment, I save the picture on a path obtained by
getExternalFilesDir(Environment.DIRECTORY_PICTURES)
and save the path to my SQLite database to look at it later.
This works fine, however, as I rate a hole bunch of mugs all day and change my phone quiet often, I want to be able to backup my App and its data by common Android backup solutions. This works fine with the SQLite Database that holds the data and is stored in App-Context.
But since the database just holds a path to the taken picture (as returned by getExternalFilesDir), the picture is not backed-up. Where do I have to save the picure, to ensure that any common Android backup software will also grap the pictures?
Is it possible to ensure that the path stored in the database is the same, after I put the backup on a new phone? Since it may be possible that the App is located somewhere else on the new phone, absolute paths are not a good idea here... Is it possible to save the picture relative to the App and just save the relative path?
As suggested by greenapps, a possible solution is to save just the relative path of the image in the database. Instead of using
getExternalFilesDir(Environment.DIRECTORY_PICTURES)
I now use
getFilesDir()
to get the app intern folder and save images there. When I want to load the picture I build the path with the same method to get the app dir and the relative path saved in the database.
I want to know how to display the images that has been stored in the database in the home activity in my application.
just store them in regular file system ,create a directory
File file=new File(getabsolutepath()+"/image/")
this path doesn't change so just store the image name in a database.
you can also store images in database using blob https://en.wikipedia.org/wiki/Binary_large_object
but it is not a good practice
I'm using sqlite db in my app and now I would like to allow user customize the background image make them able to select one from their gallery.
Should I just store the path to image and simpy refer to it every time or should I some how transfer the image to some text and store it completely in my db? The second option prevents in case of picture being deleted from gallery. But I would like to know the most appropriate way of doing that.
SQLite has a cursor limit of 1Mb. So, you will probably not be able to store it completely in the DB, when you go to to request it will probably be truncated. Store the path to the image in the database table, and access it that way.
You wouldn't store it as text. Store it as blob to your database. In my opinion this is the way to go (if you use SQLite anyway).
If you have large images then store the path to your storage and not the image to the database.
I think it would be better to save only the path of the background, you won't be limited by the size of the image
In my opinion, the best way to save the customized background image is copy it into the internal storage (private storage) of your application. If you store only the path of the file, then file cannot be available once the user deleted that.
The official docs saying about the internal storage is:
It's always available.
Files saved here are accessible by only your app by default.
When the user uninstalls your app, the system removes all your app's files from internal storage.
I have a question about saving images in an SQLite database location in the app.
I made an app for iOS where users can snap a photo or grab an existing one from the app that saves them in a local bank in own app, since the IOS does not have so many problems with disk space.
On Android already have code that takes the photo or use an existing one, now wanted to know how save them in SQLite database. (?)
I've been reading about and some suggest saving the image in SD card and insert into the database only the image path, but if for some reason it is excluded from the SD card will have an error in your application for the path referenced no longer exists.
What would be the ideal solution for this?
You should only keep the name of the picture in the database and store the picture on the internal storage, not on the sdcard, save them in the first place as private to your application only.
The ideal solution is to store it in the SD card. Storing in DB won't keep the user from deleting it. You'll also lose this information if the user clears the app data. All databases are deleted when the user does it.
Anyway, if you choose the SQLite solution, you can use a blob field. Remember that some versions of SQLite won't support large blob data. Check this out:
http://effbot.org/zone/sqlite-blob.htm
I also suggest this:
http://developer.android.com/training/displaying-bitmaps/cache-bitmap.html
Hi i want to store an image in my android application.I am confused that should i store it in the database or in an application folder?which is a better option and y??
Store it on the SDCard if possible else use application folder.
It depends from the type of image you will want to store. It's confidentially? Or public?
Create a database only for saving an image it would be non-optimal, but it you have a database created, for example to save user profiles (name, surname, birthday, etc), it could be a great option to save a profile image in the database.
Anyway, i think sdcard is the best option. And create a custom folder for your application and save all the images there ;)
Hope this helps...
Its depends on the size of images, you want to provide security to that images etc..
If not bother then store images in a application folder /asset , /drawable or external storage (If use external storage then save path of those images in database) and use it directly, To store in database is quite some ugly way, convert it into blob type and then store, re fetching from database convert into byte to bitmap..