scrolling a page in WebView programatically

[moster67]

Is it possible to scroll a page in WebView programatically, perhaps by using KEYCODE_DPAD_DOWN and KEYCODE_DPAD_UP? If yes, what if the device does not have a DPAD? Will it work anyway?

The idea is to open a webpage and with the help of a timer scroll the page downwards according to a pre-set interval.

Any other way this could be done?

 

[moster67]

It seems like SendKeys are not available for Android (except for in a test-SDK) so I guess I can give up the idea of simulating keypresses to scroll down a page in a WebView.

However, I noted that Webview has some methods called PageDown/PageUp (although not implemented in the current WebView-library) which could also be a solution but I am afraid a PageDown would be too much for scrolling the way I want. I want the scrolling to be slow and smooth, more like a line at a time.

What about Scrollview? Can it be scrolled programatically? If yes, maybe I can add a panel which embeddes a WebView? Is this possible?

 

[Erel]

ScrollView can be scrolled programatically. Usually scrollable views like WebView and EditText should not be added to a ScrollView. However it may work in your case.

 

[moster67]

Thanks. I will try it.

ScrollView can be scrolled programatically. Usually scrollable views like WebView and EditText should not be added to a ScrollView. However it may work in your case.

 

[NeoTechni]

Could you add support for those scrolling method native to the webview, and a way to detect when the use scrolls outside the boundaries of the page?
wed also need to be able to get the height of the page to scroll a percent

 

[warwound]

Hi.

Take a look at this post on stackoverflow.com.

There's a javascript code example that you could use to scroll a (known) HTML element into view.

If that's not what you need then you could probably use the same javascript method to scroll the page by a number of pixels instead.

Martin.

 

[warwound]

Hi again.

Look at the attached project.

I've used the Reflection library to execute the WebView flingScroll() method.

I can find no detailed documentation for the flingScroll method so am not sure what the two parameters passed to it specify.
I'd have guessed pixels x and y to scroll by but run the attached project and it doesn't look like the WebView is scrolling 500 pixels in y direction to me.

Martin.

 

[warwound]

I've just released a new library WebViewExtras:

http://www.b4x.com/forum/additional-libraries-official-updates/12453-webviewextras.html#post70053

The native Android WebView methods flingScroll(), pageDown() and pageUp() can now be used without the Reflection library.

Martin.

 

[NeoTechni]

Thank you.