Issue with JavaScript files not functioning in Android PhoneGap app, without the use of jQuery Mobile

I recently developed a Hybrid app using HTML5, CSS3, JavaScript, and jQuery. The app functions perfectly until I deploy it to an Android device using PhoneGap. Despite the server content loading properly, none of the functions work, almost as if my .js files are being disregarded completely. Actions taken so far:

Confirmed that <access origin="*" /> is present in the config.xml file,

Confirmed that

<uses-permission android:name="android.permission.INTERNET" />
is included in the AndroidManifest.xml file,

Verified all <script> tags are enclosed within the <body> tags in each HTML file,

Ensured that index.html still contains the original PhoneGap index.js file with the initialization code for the app and that all <script> tags come after it,

Double-checked that index.html includes all the necessary <script> tags for the project.

Below you will find the index.html file post-PhoneGap integration for your examination:

<html>
  <head>
    <meta charset="utf-8" />
    <meta name="format-detection" content="telephone=no" />
    <meta name="msapplication-tap-highlight" content="no" />
    <meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width" />
    <meta http-equiv="Content-Security-Policy" content="default-src * 'unsafe-inline' gap:; style-src 'self' 'unsafe-inline'; media-src *" />
    <link rel="stylesheet" href="css/customFitStyling.css" type="text/css">
    <link rel="stylesheet" href="css/w3c_v4.css" type="text/css">
    <title>CustomFit</title>
  </head>
  <body>

    <!--CONTENT-->

    <script type="text/javascript" src="cordova.js"></script>
    <script type="text/javascript" src="js/index.js"></script>
    <script type="text/javascript">
      app.initialize();
    </script>
    <script type="text/javascript" src="js/jquery-3.2.1.min.js"></script>
    <script type="text/javascript" src="js/customFitFunctions.js"></script>
    <script type="text/javascript" src="js/setFalseBool.js"></script>
  </body>
</html>

Answer №1

Leave your thoughts below.

<!--<meta http-equiv="Content-Policy" content="default-src * 'unsafe-inline' gap:; style-src 'self' 'unsafe-inline'; media-src *" />-->

Answer №2

After much investigation, I have finally managed to solve the issue at hand. In my functions file, there is a particular piece of code that has been causing some trouble:

// Set latest workout.
var title = JSON.parse(localStorage.workout);
$("#latest").text("Latest: " + title.title);

While this code works perfectly fine on web browsers and even on mobile devices, it seems to break every function that comes after it. Upon using console.log() to check the localStorage.workout variable, it appears to be logging an object that contains three arrays as expected. Interestingly, if I replace the JSON.parse method with this object directly, everything functions correctly and all the other functions start working again. This has left me puzzled - does anyone have any insights into what might be occurring here?

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