Jasko's Tech Lab

Building NodeJS REST service and consuming it from within Android application Introduction In this tutorial I will walk you through the process of building REST service in NodeJS. That service will enable Android users to authenticate to the back-end and set their profile photo. Using the code The application consist of two parts: Backend: RESTful service written in NodeJS Mobile: Android app written in Java Part 1. - NodeJS back-end Back-end part will enable users to: Login using email/password combination Upload their profile picture The source code is located on Github . For simplicity reasons here I am going to highlight only the important parts of the code. app.js var express = require('express'); var http = require('http'); var path = require('path'); var app = express(); var util = require('util'); var multiparty = require('multiparty'); var multer = require('multer'); var upload = multer({ dest:...

Article Source Introduction In this tutorial I will show you how to create Master-Detail web application that also have a search option. We will use the data of the Cruising Company. It contains data about: ships, booking info, sale units etc. Using the code The application consist of two parts: Backend: RESTful API written in .NET Core Frontend: SPA written in Angular 2 Download and install following tools and libraries: .NET Core 1.0.1 TypeScript 2.0 Node.js v4.0 or above. ASP.NET Core Template Pack visz file The source code is located on Github . For simplicity reasons here I am going to highlight only the important parts of the code. Start by creating new project: New -> Project. Select Web -> ASP.NET Core Angular 2 Starter. Replace following files with the appropriate code. project.json { "dependencies": { "Microsoft.NETCore.App": { "version": "1.0.1", "type": ...

Article Source Introduction In Part I of my tutorial we built a Web API that handles image labeling and translation into different languages . Now we will build Android app that can consume that API. Features we are going to have are: select destination language select image from gallery or take new photo using camera option to toogle speech output on/off Using the code All the code base is located in code section of this article. For simplicity reasons here I am going to highlight only the important parts of the code. build.gradle dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.google.code.gson:gson:2.6.1' compile 'com.android.support:support-v13:23.4.0' compile 'com.android.support:appcompat-v7:23.4.0' compile 'com.android.support:design:23.4.0' compile 'com.squareup.retrofit2:retrofit:2.0.0' compile 'com.squareup.retrofit2:converter-...

Article Source Introduction For this tutorial I will demonstrate how to use powerful Google API's for making some useful applications. This tutorial is divided into two parts: Part 1. Building WebAPI service that handles image labeling and translation into different languages. Part 2. Consuming this RESTful service from Android application. Using the code We will start by creating new WebAPI project. Start Visual Studio select: New project ->  C# ->Web ->ASP.NET Web Application -Empty. Check WebAPI, and host in the cloud to be able to publish this project later. packages.config will contain all the libraries we need for this project. <?xml version="1.0" encoding="utf-8"?> <packages> <package id="BouncyCastle" version="1.7.0" targetFramework="net45" /> <package id="Google.Apis" version="1.19.0" targetFramework="net45" /> <p...