Load more TableView Row when user scrolls "near" bottom of TableView : 

/*In this demo, we simply show how you could dynamically scroll with a 
continuous amount of data in the tableview by detecting when the user's 
scroll position gets near the end of the table and start a background 
fetch of new data and seamlessly append the new data to the 
table automatically..*/


var win = Ti.UI.createWindow();

var data = [];
var numberOfRows = 575 + 1;
var showRows = 50;
var rowNumer = 1;
for (var c = 0; c < showRows; c++) {
     data[c] = {
          title : "Row " + (rowNumer)
     };
     rowNumer++;
}

var tableView = Ti.UI.createTableView({
    data : data
});

win.add(tableView);

var navActInd = Titanium.UI.createActivityIndicator();

var updating = false;
var loadingRow = Ti.UI.createTableViewRow({
    title : "Loading..."
});

function beginUpdate() {
     updating = true;
     navActInd.show();

     tableView.appendRow(loadingRow);

     // just mock out the reload
     setTimeout(endUpdate, 2000);
}

function endUpdate() {
     updating = false;

     tableView.deleteRow(showRows, {});

     // simulate loading
     for (var c = 0; c < showRows; c++) {
          if (rowNumer == numberOfRows) {
              return;
          }
          tableView.appendRow({
               title : "Row " + (rowNumer)
          }, {});
          rowNumer++;
     }
     showRows = showRows * 2;
 
   // numberOfRows = (numberOfRows - showRows);
   // just scroll down a bit to the new rows to bring them into view

}

var lastDistance = 0;

// calculate location to determine direction

tableView.addEventListener('scroll', function(e) {
     if (rowNumer != numberOfRows) {
          if (Ti.Platform.osname == 'iphone') {
              var offset = e.contentOffset.y;
              var height = e.size.height;
              var total = offset + height;
              var theEnd = e.contentSize.height;
              var distance = theEnd - total;

              // going down is the only time we dynamically load,
              // going up we can safely ignore -- note here that
              // the values will be negative so we do the opposite
              if (distance < lastDistance) {
                  // adjust the % of rows scrolled before 
                  //we decide to start fetching 

                  var nearEnd = theEnd * .75;

                  if (!updating && (total >= nearEnd)) {
                      beginUpdate();
                  }
              }
              lastDistance = distance;
     }
     if (Ti.Platform.osname == 'android') {
         if ((e.firstVisibleItem + e.visibleItemCount) == e.totalItemCount) {
              for (var c = 0; c < showRows; c++) {
                  if (rowNumer == numberOfRows) {
                       return;
                  }
             tableView.appendRow({
                    title : "Row " + (rowNumer)
             }, {});
             rowNumer++;
          }
      }
   }
 }

});
win.open(); 

You can Download the Demo Project From Here.