jQuery Mobile fixed footer is moving when the keyboard appears

Question

I have designed an app using Phonegap and jQuery Mobile. The fixed footer works properly until I click on a dropdown or text field, which causes the footer to either disappear from view (Android 4.0) or move to the middle of the view (Android 2.2 Galaxy Tab). Any suggestions?

Phonegap Version: Cordova 2.1.0
jQuery Mobile Version: 1.2.0

Here is my code:

<div data-role="footer" class="nav-mobilyzer" data-tap-toggle="false" data-position="fixed">
  <div data-role="navbar" class="nav-mobilyzer" data-grid="d">
    <h1>footer</h1>        
  </div>
</div>

Answer 1

I had the problem in some devices the footer displayed and in others it didn't. I found this worked for me:

var initialScreenSize = window.innerHeight;
window.addEventListener("resize", function() {
    if(window.innerHeight < initialScreenSize){
        $("[data-role=footer]").hide();
    }
    else{
        $("[data-role=footer]").show();
    }
});

EDIT:

But what about orientation changes?

var portraitScreenHeight;
var landscapeScreenHeight;

if(window.orientation === 0 || window.orientation === 180){
    portraitScreenHeight = $(window).height();
    landscapeScreenHeight = $(window).width();
}
else{
    portraitScreenHeight = $(window).width();
    landscapeScreenHeight = $(window).height();
}

var tolerance = 25;
$(window).bind('resize', function(){
    if((window.orientation === 0 || window.orientation === 180) &&
       ((window.innerHeight + tolerance) < portraitScreenHeight)){
        // keyboard visible in portrait
    }
    else if((window.innerHeight + tolerance) < landscapeScreenHeight){
        // keyboard visible in landscape
    }
    else{
        // keyboard NOT visible
    }
});

The tolerance accounts for the inexact calculation of landscape height with portrait width and vis-versa.

Answer 2

Okay, this thread is as old as the internet at this point, but the answer above didn't seem to do the job for me.

The best way I found was to bind a method to the jquery .blur() event, and then call fixedtoolbar() methods in a very specific order, i.e.

    var that = this;
    $(':input').blur(function(){
        that.onFocusLoss();
    });

......

onFocusLoss : function() {
    try {
        $("[data-position='fixed']").fixedtoolbar();
        $("[data-position='fixed']").fixedtoolbar('destroy');
        $("[data-position='fixed']").fixedtoolbar();
        console.log('bam');
    } catch(e) {
        console.log(e);
    }
},

Answer 3

The keyboard is opened when we have the focus on an input so:

// hide the footer when input is active
$("input").blur(function() {
    $("[data-role=footer]").show();
});

$("input").focus(function() {
    $("[data-role=footer]").hide();
});