Question

I want to do some stuff. I wanna do lazy loading in ListView. My ListView contain more than 10,000 data & only in TextView. so i can’t load all that data in first time when i launch list activity. it’s not efficient so i can load first 20 or 30 items in list. further the rows of the ListView are loaded when I scroll over them. so when i reach at last index of ListView on last index, i will put progressbar n it will note that the new data are loaded, so at that time new data will be load with last + 1 index. How can i do this?

Answer 1

You can achieve this by using endless Adapter implementation. This exactly does what you want. You can also restrict the number of rows to be refreshed per scroll. Here is a link to it.,

Android: Implementing progressbar and "loading…" for Endless List like Android Market

https://github.com/commonsguy/cwac-endless

To use it, you extend EndlessAdapter to provide details about how to handle the endlessness. Specifically, you need to be able to provide a row View, independent from any of the rows in your actual adapter, that will serve as a placeholder while you, in another method, load in the actual data to your main adapter. Then, with a little help from you, it seamlessly transitions in the new data.