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Wei-Ting Chen
Wei-Ting Chen
7,632 Points
Posted by Wei-Ting Chen
Wei-Ting Chen
7,632 Points

Why does "No item to display!" not showing up when we have "setListAdapter(adapter)"?

Hi every teachers & classmates, in the "activity_main_list.xml",we have 

<listView>

and

<textView>

so what is the reason that only listView shows up in the emulator?

Also,after we comment the setListAdapter(adapter) and ArrayAdapter,the textView shows up again! Why?

thanks!

1 Answer

Gloria Dwomoh
Gloria Dwomoh
13,116 Points

Hi Wei-Tin. I markdown your code so that the listView and textView tags can appear.

"so what is the reason that only listView shows up in the emulator?"

-According to what the instructor said, the android system will display the textView depending on whether there is data in the list or not. There is data in the list hence it won't display it.

"Also,after we comment the setListAdapter(adapter) and ArrayAdapter,the textView shows up again! Why?"

-Also setListAdapter binds the ArrayAdapter you created to the listView (which makes the list you have given it to appear), by commenting it, there is no list bound to the listView so it is practically empty hence that makes the textView display the "No items to display!" message.

I hope this helped.

Gloria Dwomoh
Gloria Dwomoh
13,116 Points

You are welcome