Nullpointerexception With Listview And Setadapter

I keep getting the following nullPointerException and I can't quite figure it out any help would be greatly appreciated. The program query() from DB and then use adapter to populat

Solution 1:

check viewlisting.xml, It does not contain ListView with id R.id.list

Solution 2:

I guess there is something wrong with the compiler or Eclipse. I ran into this problem tonight as well. But after I renamed the ListView ID, and the XML file gets re-compiled, then it works!

I found sometimes, the changes in the XML file is not automatically rebuilt. And sometimes, the build result of the XML file seems lost.

Solution 3:

I had same problem. I found that I used setcontentview() with the wrong argument because I copied and pasted code from another class. I repaired wrong argument and problem solved!

Solution 4:

check if you have add in onCreate class method this line:

setContentView(R.layout.your_xml);

Solution 5:

An answer of Proapp Aplicativos: "check if you have add in onCreate class method this line: setContentView(R.layout.your_xml);" helped me to resolve a problem.