Android Question Freeze when using WebView to show large images

[Toley]

Hello, I'm using this code snippet to show large images. https://www.b4x.com/android/forum/threads/b4x-use-webview-to-show-large-images.102910/
I know there is a better alternative linked at the top of the thread, but for now that one is enough for my needs.

The problem is if I long touch the image (3 sec+), a small copy of the image appear where I long touch and the tablet freeze. The only way to get back is to do a power cycle.
I join a screenshot of the frozen image and a minimal project to test it.

P.S. : If the only solution is to use the "better alternative" then I will try to implement it.

Thanks for any help.

Edit: I just realize files are too big for uploading directly. So here is the link.

Gofile - Cloud Storage Made Simple

Secure, fast and free cloud storage solution. Upload and share files instantly.

gofile.io

 

[Toley]

I've try the alternative and I cannot use it because the image can be moved outside the border of the view.
So the original code has to be fixed or I will have to find a totally different solution.

 

[Toley]

My files were too big for uploading here so here is a link for the files

Gofile - Cloud Storage Made Simple

Secure, fast and free cloud storage solution. Upload and share files instantly.

gofile.io

I would really like a solution for this bug please.

 

[Erel]

The problem is if I long touch the image (3 sec+), a small copy of the image appear where I long touch and the tablet freeze. The only way to get back is to do a power cycle.
I join a screenshot of the frozen image and a minimal project to test it.

This doesn't happen in B4A framework code. WebView is a native view and it looks like you are hitting an OS bug.

Switch to ZoomImageView.

 

[Toley]

Thank you @Erel for the suggestion but with this one too I can move the image outside the view and I don't want this. See attachment.

 

[Toley]

I managed to solve my problem. By default it use Chrome Webview. With the help of IA (to find the ADB commands) I was able to switch to Android System Webview. I don't have the problem anymore. Thanks to all.