Learn more about CRUD operations at Wikipedia. Performing CRUD operations efficiently is crucial for maintaining the performance, consistency, and integrity of your application's data. These operations are essential for any application that involves data storage and retrieval. If you need assistance with your Android app development or are looking to hire Android developers, visit Reintech for more information.ĬRUD (Create, Read, Update, and Delete) operations are the fundamental functions required for managing and manipulating data in a database. This should serve as a solid foundation for further development. We created a helper class for managing database creation, versioning, and CRUD operations, and integrated it into our main activity. In this tutorial, we have learned how to develop a database-driven Android app using SQLite. For example, insert a new record:ĭatabaseHelper dbHelper = new DatabaseHelper(this) In your main activity, create an instance of the "DatabaseHelper" class and use it to perform CRUD operations. Step 4: Integrating the Database Helper Class in the Activity Public class DatabaseHelper extends SQLiteOpenHelper ) This class will help manage the database creation, version management, and CRUD operations. Step 2: Creating the Database Helper ClassĬreate a new class called "DatabaseHelper" that extends the SQLiteOpenHelper class. Implementation 'nstraintlayout:constraintlayout:2.0.4'ĪndroidTestImplementation ':junit:1.1.2'ĪndroidTestImplementation ':espresso-core:3.3.0'Ĭlick "Sync Now" to update your project with the added dependencies. Implementation 'androidx.appcompat:appcompat:1.2.0' Once your project is set up, open the adle file (Module: app) and add the following dependencies: Give your project a name and set the package name, then click "Finish". Choose the "Empty Activity" template and click "Next". ![]() Step 1: Setting Up the Android Studio Projectįirst, create a new Android Studio project by selecting File > New > New Project. This tutorial assumes you have a basic understanding of Android app development and Java programming. SQLite is a lightweight and serverless database engine that allows you to create local databases for your Android applications. IonicApp.In this tutorial, we will learn how to develop a database-driven Android app using SQLite. Var ionicApp = angular.module('starter', ) Open www/js/app.js in your text editor and make it look like the following: What comes next is going to be kept basic for simplicity, but use your imagination if you want it to be better. UPDATE : To include the database file into your project, it must live in your project’s www directory. For iOS only, you’ll also need to add the file from the Resources directory into your XCode project. Just substitute IonicProject with whatever you called your project. OBSOLETE AS OF : To include this database file into your project you must place it in your platforms/android/assets directory for Android and your Resources directory for iOS, which in my case is platforms/ios/IonicProject/Resources. If you’re unfamiliar with making SQLite databases you can use DB Browser for SQLite, which I used when writing this guide. In addition to creating the table, it will be filled with the following data: id Let’s start by creating a fresh Ionic project to work with:ĬREATE TABLE people (id integer primary key, firstname text, lastname text) ![]() Without having first read it, this tutorial may be confusing. Now I’m not going to show how to do the example scenario I mentioned, but the following should put you on the right path for working with pre-populated SQLite databases.īefore we begin, I highly recommend you read the previous article I did regarding SQLite and Ionic Framework. This task is not difficult, but it could get a little confusing. Since you’re only doing small changes after the initial, it is more effective than trying to download everyone. You could ship each version of your app with the most recent lookup directory, and use an API to update it. Let’s say you have 10,000 employees, so populating the data via a web request is probably going to take a long time. ![]() Since writing that post, a few of my readers asked me how to ship an application with a pre-populated SQLite database.Ī scenario where this might be useful is if you created a lookup directory for all the employees at your company. ![]() The article was a guide for using the Apache Cordova SQLite plugin for data management. Recently I did an article regarding SQLite as an alternative to local storage in an Ionic Framework application.
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