Storing data using the Android SDK
Last updated on 2016-10-02
About the Book
You have a good start on building your Android application, but now comes the time to store the data entered by your users on their device. It's an important part of any application; even a quick prototype needs a way to store data. What is the best way to do it?
Here is a quick guide to get you started with the tools available in the Android SDK, without having to learn yet another new framework or library. You'll learn how to :
- Save simple data to flat files in the internal and external storage of the device,
- Save user preferences using the Preferences API,
- Save structured data in an SQLite database,
- Save images so you can refer to them in a SQLite database,
- Persist the state of an activity so users don't lose their input just because they rotated their device or took a phone call.
This guide also includes examples to help you implement all of those in your own Android applications. Purchase now and you can be up and running in a few minutes!
Chapter 1 : Saving data to a file
- Internal storage
- External storage
- Example code to save to a file
- Chapter 2 : Saving preferences
Chapter 3 : Saving to a SQLite database
- Inserting a new row
- Reading existing rows
- Updating existing rows
- Deleting existing rows
- Chapter 4 : Saving an image in a SQLite database
Chapter 5 : Storing the state of an activity
- Saving the current UI state
- Saving your data to a permanent data store
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