Issue with scene changing in Android Build. Buttons register touches but the functions called dont work.

Questions & Answers
1

I am trying to figure this out.
I built an .apk to load onto my device to test it out. I am not using unity remote, as it does not work for me. Nor’ am I using any debug services like ADB as my usb port on my phone is not working.

I run the application fine on the phone. I have a Samsung S9+ with the highest API being 29 I believe currently. I wanted to assume that the OnClick() callback function doesn’t work with Touch Phones, but I couldn’t find a google search that supported that argument.

I have a start button that changes the scene to the main level selector. I use Application.LoadScene(int sceneIndex) to change scenes. This is where I assumed the OnClick() callback doesn’t work because the animation for the button script works perfectly; it does its thing.

Is there something I am missing?

Here is the code. Everything runs completely fine on unity editor and PC.

    using UnityEngine;
    using System.Collections;
    using System.Collections.Generic;
    using System;
    using SimpleJSON;
    
    public class HomeController : BaseController
    {
        private const int PLAY = 0, RATE = 2;
        public ToggleButton tgSound, tgMusic;
        protected override void Start()
        {
            base.Start();
            GameState.currentMode = GameState.GameMode.Challenge;
            tgSound.IsOn = Sound.instance.IsEnabled();
            tgMusic.IsOn = Music.instance.IsEnabled();
            Music.instance.Play(Music.Type.MainMusic, true);
        }
    
        public void OnToggleSound()
        {
            tgSound.Toggle();
            Sound.instance.SetEnabled(tgSound.IsOn);
            Sound.instance.PlayButton();
        }
    
        public void OnToggleMusic()
        {
            tgMusic.Toggle();
            Music.instance.SetEnabled(tgMusic.IsOn, true);
            Sound.instance.PlayButton();
        }
    
        public void OnClick(int index)
        {
             Debug.Log("Button Pressed");
            Sound.instance.PlayButton();
            Debug.Log("Sound Played");
            switch (index)
            {
                case PLAY:
                    
                    CUtils.LoadLevel(1);
                    Debug.Log("Level Loaded");
                    
                    GameState.currentMode = GameState.GameMode.Challenge;
                    break;
                case RATE:
                    CUtils.RateGame();
                    break;
            }
        }
    }
`

This code handles the actual scene change.
`
`
    public static void LoadLevel(int levelIndex)
    {
        SceneManager.LoadScene(levelIndex);
        SetPreviousScene();
    }



`
2

Does the button work in Editor?

If it doesn’t, maybe you haven’t referenced your OnClick() method script to the button from Inspector (drag and drop). You need to either have a reference to the button from your script and then add a listener or such, or simply drag the object containing this script on to the button and select the OnClick() method that you have written.

3

Issue was singletons were not being correctly setup at start. this halted any code of course after the error. Used ADB logcat on an android device i forgot i had. Luckily.