Raycasting on Unity Button through Webview [Android]

[SadevK95]

Hi. I'm using this webview for load Web based Video Call application. I just want to navigate different Unity scene when the user click on hang-up button on webpage.

1. My workaround on achieving this is place a unity UI button under the the web hangup button and click it. Can you kindly assist me to achieve this.

2. Or is there any way to communicate webpage to Unity like trigger an Unity event by listing on the webpage clicks.

[Volko76]

Hi @SadevK95 ,
Both are possibe but method 2 is recommended as method 1 is experimental (and I have personnaly issues with him for 2021+ versions).

So for method 2, you just need in your webpge to create a html button that calls the js function Unity.call(something) where "something" is a string that will be passed to Unity in the SampleWebView.cs script under webViewObject.Init(cb: (msg)).
msg will be your "something".

So here is an idea of the code :

In you webpage :

In you SampleWebView.cs in unity :
IEnumerator Start()
{
webViewObject = (new GameObject("WebViewObject")).AddComponent();
#if UNITY_EDITOR_OSX || UNITY_STANDALONE_OSX
webViewObject.canvas = GameObject.Find("Canvas");
#endif
webViewObject.Init(
cb: (msg) =>
{
Debug.Log(string.Format("CallFromJS[{0}]", msg));
status.text = msg;
status.GetComponent().Play();
if(msg = "loadScene1"){
SceneManager.LoadScene("Scene1ForExample");
}
},

[SadevK95]

Hi @Volko76, Thanks a lot for prompt response. Can you bit elaborate on how to webpage html button code must be construct. Thanks a lot.

[KojiNakamaru]

You can find a concrete example in the sample app. The sample app invokes Unity.call() as below:

unity-webview/sample/Assets/StreamingAssets/sample.html

Line 32 in 3aa60f0

<input type="submit" value="Send Message!" onclick="Unity.call('form?msg=' + document.getElementById('input1').value); return false;"/><br/>

which in turn invokes the cb: callback:

unity-webview/sample/Assets/Scripts/SampleWebView.cs

Lines 40 to 46 in 3aa60f0

	webViewObject.Init(
	cb: (msg) =>
	{
	Debug.Log(string.Format("CallFromJS[{0}]", msg));
	status.text = msg;
	status.GetComponent<Animation>().Play();
	},

[Volko76]

@SadevK95

Hi @Volko76, Thanks a lot for prompt response. Can you bit elaborate on how to webpage html button code must be construct. Thanks a lot.

Oh i provided the button example but it seems that Github has deleted it from my comment due to cybersecurity reasons.

I meant :
<button onclick="Unity.call('loadScene1')">Load Scene 1<button>

But @KojiNakamaru provided also a sample project, you can take a look at it.

[SadevK95]

@Volko76 Thanks a lot. It works now. :)

[Volko76]

@SadevK95 You're welcome ^^, I'm glad you managed to do it