Customize JavaScript code loaded from a local static HTML file based on user selection from a list in a prior activity on Android

As a newcomer to the world of Android and Java, I greatly appreciate your patience in advance!

I'm currently faced with the challenge of passing a file path (which could be a simple string or integer) from an activity written in Java to a WebView that is rendering a static local html file running JS. The complexity arises due to my use of an AR SDK (Wikitude) which requires their own custom WebView (including a CameraSurfaceView) - control over this suite is managed by a JS file loaded by the html document.

I'm open to any solutions as I am unfamiliar with Android development and unsure where to start on this issue. Essentially, I want to select an option in one activity and relay that information to my JS file for loading/rendering assets. In a web app, you could use templating to insert dynamic variables into your html (e.g. erb in ruby or moustache in JS).

If there's no direct way to template Java into a JS file, my current idea involves writing a JSON object using JsonWriter in the activity and then loading that file in the JS. However, I'm struggling to understand how to manage internal/external storage in Android in relation to the assets folder of my app - any guidance on this would be much appreciated.

This explanation is kept intentionally broad, but I can provide code upon request.

javascriptjavaandroidjsontemplating

Answer №1

When transitioning from one activity to another, you have the option to carry over selected data by utilizing the following method.

//Initiating a new activity

Intent intent = new Intent(MainActivity.this, Second_Activity.class);

Include the data within the intent

intent.putExtra("choice1", "chosen_option_1");
intent.putExtra("choice2", "chosen_option_2");
startActivity(intent);

In the onCreate() method of the second activity, extract this data from the intent as demonstrated below:

String choice1 = getIntent().getStringExtra("choice1");

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