Android Question html video

[Almora]

library: WebViewExtras2

I can't capture a screenshot. Where am I making mistakes?

 

[Almora]

I can't add a code to the question. the error in the picture comes out.

 

[aeric]

I can't add a code to the question. the error in the picture comes out.

Try add a space to keywords like "Chr(..." to "Chr (..."

 

[Almora]

didn't happen. i had to zip.

 

[aeric]

You need to add

WebViewExtras1.addJavascriptInterface(JavascriptInterface1, "B4A")

For forum posting, "script:" is allowed but you can still write "javascript.:" (no dot) in your code.

Sub Class_Globals
    Private Root As B4XView
    Private xui As XUI
    Private Button1 As Button
    Private WebView1 As WebView
    Private B4XImageView1 As B4XImageView
    Private WebViewExtras1 As WebViewExtras
    Private JavascriptInterface1 As DefaultJavascriptInterface
End Sub

Public Sub Initialize
'    B4XPages.GetManager.LogEvents = True
End Sub

Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("web")
    WebViewExtras1.Initialize(WebView1)
    JavascriptInterface1.Initialize
    WebViewExtras1.addJavascriptInterface(JavascriptInterface1, "B4A")
    WebView1.LoadUrl("https://www.w3schools.com/html/mov_bbb.mp4")
End Sub

Private Sub Button1_Click
    Dim js As String = $"script:(function() {
    const video = document.querySelector('video');
    const canvas = document.createElement('canvas');
    canvas.width = video.videoWidth;
    canvas.height = video.videoHeight;
    canvas.getContext('2d').drawImage(video, 0, 0);
    const data = canvas.toDataURL('image/jpeg',100);
    B4A.CallSub('B4ACaptured', true, data);
    })();"$
    WebViewExtras1.executeJavascript(js)
End Sub

Public Sub B4ACaptured (data As String )
    Log("got: " & data)
    B4XImageView1.Bitmap = Base64EncodeDecodeImage.Base64StringToImage(data.SubString(23))
End Sub

 

[Almora]

thanks a lot..