Question

Can anybody recommend a good way to detect screen width on a HTML5 Android App built in Phonegap?

Our page is reasonably fluid – but I need to switch logo’s/footer graphics for smaller screens – so I inject a stylesheet for smaller versions – seems to work fine in general, some phones (HTC Wildfire)seem to think they are 320px width when they are only 240 so I’m struggling!

This is my current detection code – any suggestions would be really helpful!

Cheers
Paul

 $(document).ready(function() {
 var pageWidth = $(window).width();
 var sizeSelected = "chilliAppBeta";
 alert(pageWidth);adjustCSS();

 function adjustCSS(){
 if (pageWidth >= 0) { if(pageWidth < 300) {alert("smallscreen"); applyChilliCSS();}  }
 if (pageWidth >= 300) { sizeSelected = "chilliAppBeta" }
 }

 function applyChilliCSS() {
 var chilliStyleSheet =$('<link href="CSS/chilliAppBetaSmall.css" rel="stylesheet"        class="chilliLink" type="text/css"/>');

 $('head').append(chilliStyleSheet);

 }
 });

Answer 1

You don’t need JavaScript to add additional rules based on your screen dimensions, you can use CSS3 Media Queries instead like:

.smallScreenContent{
display: none;
}
@media (max-width:400px){ //the following rules will only be used for screens up to 400px width
.smallScreenContent{
display: block;
}
}​

See this link for specifications and this fiddle (resize the result) for a working demo.