[TIMOB-7400] Android: ScrollView - Runtime error generated when scrollView.contentOffset object is used in a call back function

GitHub Issue	n/a
Type	Bug
Priority	High
Status	Closed
Resolution	Fixed
Resolution Date	2012-03-11T22:31:13.000+0000
Affected Version/s	Release 1.8.0.1, Release 1.8.1
Fix Version/s	Sprint 2012-03, Release 2.0.0, Release 1.8.2
Components	Android
Labels	parity, qe-and012312, qe-testadded
Reporter	Wilson Luu
Assignee	Hieu Pham
Created	2012-01-25T13:49:19.000+0000
Updated	2012-03-11T22:31:13.000+0000

Description

Steps to reproduce: 1. Launch the following code in app.js:

var win = Titanium.UI.createWindow({  
    layout:'vertical',
    backgroundColor:'#fff'
});

var scrollView = Ti.UI.createScrollView({
	showHorizontalScrollIndicator:true, showVerticalScrollIndicator:true,
	width: 250, height: 100, top: 50,
	borderColor:'green', borderWidth:1,
	contentWidth:1000, contentHeight:100
});

for(var i=0; i<10; i++) {
	for(var j=0; j<10; j++) {
		scrollView.add(Ti.UI.createLabel({
			top:i*100, left:j*100,
			width:100, height:100,
			text:i+':'+j, textAlign:'center',
			color:'white',
			backgroundColor:'#A0' + Number(i%2*8).toString(16) +'0'+ Number(8-j%2*8).toString(16)+'0',
			borderColor:'black', borderWidth:1 
		}));
	}
}

var button = Ti.UI.createButton({title:'Flip', width:100, height:50});
button.addEventListener('click', function() {
	scrollView.width = 100;
	scrollView.height = 250;
	
	scrollView.contentWidth = 100;
	scrollView.contentHeight = 1000;

	button.title = 'Click again';
	
});

scrollView.addEventListener('scroll', function() {
        // bug is here 
	Ti.API.info('Offset: (' + scrollView.contentOffset.x + ', ' + scrollView.contentOffset.y + ')');
});
win.add(scrollView);
win.add(button);
win.open();

Actual: Runtime error occur. See attachment. Expected: Should not get a runtime error. Above code ran without error in iOS Note: Occurs in 1.8.0.1

Attachments

File	Date	Size
device-2012-01-25-125800.png	2012-01-25T13:49:19.000+0000	30164

Comments

Opie Cyrus 2012-02-07

updated title

Hieu Pham 2012-02-07

Testing code:

   var win = Titanium.UI.createWindow({  
       layout:'vertical',
       backgroundColor:'#fff'
   });
   
   var scrollView = Ti.UI.createScrollView({
   	showHorizontalScrollIndicator:true, showVerticalScrollIndicator:true,
   	width: 250, height: 100, top: 50,
   	borderColor:'green', borderWidth:1,
   	contentWidth:1000, contentHeight:100, contentOffset:{"x":300, "y":0}
   });
   
   scrollView.contentOffset = {"x":400, "y":100}; 
   
   for(var i=0; i<10; i++) {
   	for(var j=0; j<10; j++) {
   		scrollView.add(Ti.UI.createLabel({
   			top:i*100, left:j*100,
   			width:100, height:100,
   			text:i+':'+j, textAlign:'center',
   			color:'white',
   			backgroundColor:'#A0' + Number(i%2*8).toString(16) +'0'+ Number(8-j%2*8).toString(16)+'0',
   			borderColor:'black', borderWidth:1 
   		}));
   	}
   }
   
   var button = Ti.UI.createButton({title:'Flip', width:100, height:50});
   button.addEventListener('click', function() {
   	scrollView.width = 100;
   	scrollView.height = 250;
   	
   	scrollView.contentWidth = 100;
   	scrollView.contentHeight = 1000;
   
   	button.title = 'Click again';
   	
   });
   
   scrollView.addEventListener('scroll', function(e) {
           // bug is here 
   	Ti.API.critical("x: " + scrollView.contentOffset.x + " y: " + scrollView.contentOffset.y);
   });
   win.add(scrollView);
   win.add(button);
   win.open();

Natalie Huynh 2012-02-09

No longer getting the runtime error, however the vertical scroll is not responding Tested with 1.9.0.v20120208180134 on Droid 3 (2.3.4)
Natalie Huynh 2012-02-09

Vertical scroll issue has a separate bug TIMOB-7402 closing this as we no longer get the runtime error

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