Examining the JavaScript file for integration into a Java application

Currently, I am utilizing jsoup for parsing HTML content from a website. The issue I am facing is related to two option lists that are generated dynamically from a multidimensional array within a JavaScript file. Due to the dynamic nature of these lists, jsoup is unable to parse the results in HTML. However, all the necessary data can be found in the JS file. My objective is to periodically load this file and store or update the array data from it into a local database within an Android application. The specific JS file involved can be accessed through this link: here. For reference, the webpage showcasing the lists can be viewed here: here. Is there a viable method to selectively download certain parts of this file for manipulation in Java, similar to handling a DOM in HTML?

javascriptjavaandroidrhino

Answer №1

If you want to incorporate JavaScript functionality into your Android app, there are different approaches you can take. One option is to use a WebView with a JavascriptInterface, while another alternative involves using the Rhino engine provided by Mozilla.

To implement the Rhino approach, start by downloading the Rhino library (version 1.7.7.1) from the official source.

After downloading the Rhino jar file (e.g., rhino-1.7.7.1.jar), move it to the libs folder within your Android project directory.

Next, add the following dependency to your build.gradle (Module: app) file:

dependencies {
    [other dependencies]
    compile files('libs/rhino-1.7.7.1.jar')
}

The sample activity provided below demonstrates how to load a script file, modify the script based on comments, and execute functions to populate arrays. These arrays are then retrieved and stored as Java arrays:

MainActivity.java

// Code for MainActivity class goes here

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