Ion List Item Background image?

You could make a directive for this.

.directive('backImg', function(){
    return function(scope, element, attrs){
        var url = attrs.backImg;
        var content = element.find('a');
        content.css({
            'background-image': 'url(' + url +')',
            'background-size' : 'cover'
        });
    };
});

 <ion-item back-img="{{item.bg}}"></ion-item>