List view crashing

Question

I am trying to create ListView and fill it with data , but when i launch the application crashes and shows me a message

Unfortunately,…

Answer 1

It seem that your layout is out of scope of the code and thus cannot be loaded. When you check the log you can see the error "NullPointerException" which indicates that you are trying to access an object that does not exist.

Probably it is the line

ListView  v = (ListView)findViewById(R.id.mylist);

that is not creating the object as you expect. If you put a breakpoint on this line you will see that is is null and by stepping to the next line

v.setTextFilterEnabled(true);

you will see that the exception occurs here.

Please check your references and how you invoke the layout in order to get the proper object loading.