We’ll keep the script in the res/raw/ folder. Add the necessary columns and choose their data types. You can do it manually, writing CREATE TABLE statements, or you can use the proper tool – Vertabelo. In order to store our data in a SQLite database we need to follow these 4 steps: You can find them in the following packages: Android SDK provides a special set of classes which make it really easy to create database structures and operate on the data. Persistent Storage – SQLite DatabaseĮvery Android application may have one or more private SQLite databases. We need to add a persistent storage to it.
After the process finishes or gets killed, all provided data is lost. Implementation of the TodoTasksManager interface – InMemoryTodoTasksManagerImpl – holds the data in memory. This application doesn’t meet the requirements – its storage is temporary. After a task is complete, we may either mark it is as “done” or just delete it. When we launch the application, the list of ToDo tasks is empty. I wrote a simple Android application: “My TODO List.” It consists of a single activity with a list of tasks, two dialogs and a single manager holding the data in memory. Ready to take off? Starting Point: In-Memory Application In subsequent articles I’d like to cover more sophisticated issues, such as migration between DB versions. Today I’ll say a little bit about some Android platform basics:
#Android idatabase how to
I assume that you know how to write and run (on an emulator or a device, it doesn’t matter) a very simple app. I’d like to focus on the use of local SQLite databases. But not the kind of “hello world” applications – there are plenty of tutorials about that.
This made me think that it may be worth writing a few words about how to create mobile applications for these two mobile platforms. Together with iOS, Android dominates in the mobile devices’ world. According to the report of the International Data Corporation, Android operating system reached more than 80% market share during the 3rd quarter of 2013.