How to use data given in html href in android

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http://stackoverflow.com – I am new to android. I loaded a html page in android webview, in that html file I have given "href" in which instead of giving link to any html file or any site I have given some values like "callme?number=0456234543". while clicking the link it has to display a popup with the given number. But I do not know how to trigger this in android. I thought that WebViewClient will be used for this even though i don know how to code this. Can anyone help me with source code for this? Thanks in advance. (HowTos)