How to implement Android Pull-to-Refresh

In Android applications such as Twitter (official app), when you encounter a ListView, you can pull it down (and it will bounce back when released) to refresh the content.

Image is not fit into QuickContactBadge

I have create a listview of Contact numbers , the list item contains the QuickContactBadge and TextView now whenever i tried to load image into QuickContactBadge it does not get fit into the QuickContactBadge Frame and at the same time QuickBadgeContact itself will also get shrink.

ListView doesn"t stop on finger up?

I have a listView which defined like this in xml:

Crash when switching to ListView?

I have a normal LinearLayout for my main.xml , and my second activity is a ListView . I have a button on main.xml that should take me to the ListView . I get an Unexpected Error message and have to force close when I press the button.

Header always shows in android-pulltorefresh when customize

I was trying to customize android-pulltorefresh library developed by Johan Nilson. I wanna use my own adapter rather than a String array. I was able to complete almost every thing but the pull to refresh header is always visible. (see the image) I want it to visible only when I pull the listview like it does with the demo app. I compared my code with the demo but I couldn't find any difference between them which effect layout.