I am new to android. I would like to know how to retrieve stored images from a database. No add or delete functionality. I want to retrieve already stored images from a database. Please help me achieve this.
This answers assumes that you are retrieving images from a database in another app (because you'd already now how to retrieve images from a database that you created).
If the database is within another application, you must use a content provider. This link will redirect you to the official documentation. It covers all you will need to know about content providers.
In the most basic terms ever, to use a content provider you must first ask permission. Then you query the application that stores the database rather than the database itself (note: the application you query in turn queries the database). Therefore, you must have documentation that will provide predefined methods that must be used.
Not sure what really you want.
But if you finding a simple way to store image to database, you can try base64 image, it is like a string so simple store and read it in/from database.
To display base64 image on html, use can you
<img src="data:image/gif;base64,base64_data_here"/>
Reference to more information:
To convert your image to base64
How to convert a image into Base64 string?
To convert base64 to image:
How to convert a Base64 string into a BitMap image to show it in a ImageView?
Related
How can i retrieve 1 image at a time using Picasso to display as a Profile Picture of currently logged-in user??
I saw many other solutions on stackoverflow but all of them were related to Recycler View for displaying all images in list format.
In short how can I make a reference to Firebase Storage to fetch image?
Thanks in advance.
In short, how can I make a reference to Firebase Storage to fetch the image?
In order to be able to get an image from Firebase Storage, you need to know its path. If you need to get that path directly from the Firebase Console, you should click on an image, and on the right-hand side will see a section named File location. Inside this section, under the Access token, you'll see the actual access token of the image. Simply clicking on the token, will copy the entire download URL in the clipboard. Paste it in your project and that's it.
If you need it programmatically, please check my answer from the following post:
How to get the download url from Firebase Storage?
I would like to create an application which accepts image in android convert it to base64string. The resulting base64 string will be sent to the rest API where it is converted to byte array and store in SQL DB. Is this the best possible way to store image in SQL DB or there any other possibilities?
Better practice is to store the string of the location on the filesystem where the service that executes your database call is hosted. When you retrieve the 'image' you retrieve the location and use that to pull back the image from the file system rather than storing the entire binary on the database.
This is My way , I will just say in simple way .first i create global path like "yourpath/"
then I Get image from server and Store it in device storage in the global path
then I Store only image name like imagename.jpg to the sqlite
at last I use image name stored in sqlite and concatenate with global path to display images whenever I want
I am currently storing an Object in a Firebase Database containing name, description and base64 of a photo. I know this is not a good practice but it works for now. I have some knowledge how to upload to a firebase storage and how to retrieve an image. Let's say I want to upload an object do a database containing name and description and also a photo but this time to the storage. And let's say there is 100 of those objects with 100 images. What should I do that each object is associated with the correct image?
Currently I am developing an application which displays cricket scores from an api. The api returns json data of a list of live matches, which has a unique id of every match. By passing unique id of match in url, we get entire scorecard of match. But, this doesn't return photos of the players playing. So i want to display them in an imageview along with playername, Runs, Balls, boundaries,etc.
Something like this.. What's the best way? Firebase Or something else?
You need to use libraries like Glide for loading images from any link.
And for links of images you can maintain static array of URL's of images or you may write some dynamic code by which links of profile images will be extracted from the json id's (by requesting on some generic URL using those id's) you already have so that you need not to maintain any static array.
I am developing a places of interest app which will display the list of places of interest in a location.
When user chooses one, it will display more information and address etc.
How do I store all this data? Currently I am using a text file to store all the data and subsequently when user chooses a place, it will parse the text file and retrieve the necessary data for display.
Any advice on what is a better way to do this? I looked at SharedPrefs, but it is more like storing "key-value" pair and in this case I need to store a large amount of data.
I want the info to be available even when the device is offline, thus I can't download from an online server upon request.
Any other way to do this?
You may store it to XML file using XML serializer, here is very good tutorial for learning that,
http://www.ibm.com/developerworks/library/x-android/
and it can be easily parsed using Java XPath Api. Have a look at this at parsing XML files
http://www.ibm.com/developerworks/library/x-javaxpathapi/
Use SQLite
It can store large data.
It is available offline.
All your problems will be sorted out.
Hre we have a wonderful tutorial for sq-lite
http://www.vogella.com/articles/AndroidSQLite/article.html
How about a relational database?
http://developer.android.com/training/basics/data-storage/databases.html
Take a look at Serialization. If you do not need database access, you could define a class what holds every information you need. Then, you can do the following:
when you need to save the datas, you serialize your object, dumping its content to a file, for example on the SD card
when you want to load the datas, you just load the above mentioned file, and get back everything from the dumped file
I am using this method in my app to cache some datas that would need internet access, so the user can still view it, and with proper implementation, this can work very nicely.
Use database, create table and insert all the data in it. When you need the data just fire the query, and you are done.
SQLite is fine for Android.
Depending on the type of data you want to store, you could use a SQLite Database (provided with Android) if it has a normal database structure. You could Serialize your data and save it in a raw or encrypted file, making you data implement Serializable.