Looking to implement a scroll bar in your PhoneGap mobile app for Android?

Encountering an issue with my Android PhoneGap mobile website application. I have implemented a scroll bar in the application which works perfectly on PC. However, when testing on an Android device (mobile phone), the scroll bar does not enable.

Answer №1

Personally, I have found that iscroll can be problematic, so I sought out an alternative solution. Here is what you can try:

1.) Set the overflow of your DIV to auto (or scroll) and specify its height like this:

<div id="wrapper" style="overflow:auto; height: 200px">...content...</div>

(I typically calculate the height with JavaScript based on the user's screen size rather than setting a fixed height for all devices, but for demonstration purposes, a fixed height is used here.)

2.) Add the following JavaScript code:

<script>
function isTouchDevice(){
    try{
        document.createEvent("TouchEvent");
        return true;
    }catch(e){
        return false;
    }
}

function touchScroll(id){
    if(isTouchDevice()){ //if touch events exist...
        var el=document.getElementById(id);
        var scrollStartPos=0;

        document.getElementById(id).addEventListener("touchstart", function(event) {
            scrollStartPos=this.scrollTop+event.touches[0].pageY;
            event.preventDefault();
        },false);

        document.getElementById(id).addEventListener("touchmove", function(event) {
            this.scrollTop=scrollStartPos-event.touches[0].pageY;
            event.preventDefault();
        },false);
}
} 
</script>

3.) Call the function on page load using jQuery:

$(document).ready(function() { 
   touchScroll("wrapper");
});

4.) If you want visible scrollbars, define the following CSS rules:

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  border-radius: 10px;
  background-color: #000;
} 

Answer №2

Check out this helpful PhoneGap resource

This guide is specifically designed for Android and PhoneGap applications, providing solutions for vertical and horizontal scrolling.

Answer №3

Here is an example of what the code looks like:

public class MyActivity extends DroidGap {

@Override
  public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    super.loadUrl("file:///android_asset/www/index.html");

     // Display vertical scrollbar and hide horizontal scrollBar
     super.appView.setVerticalScrollBarEnabled(true);
     super.appView.setHorizontalScrollBarEnabled(false);
    // set scrollbar style
    super.appView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
}

}

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