Spikas reply is not correct, you dont have to use findViewById when you use @ViewById in android annotations. The thing is that the views have not been injected yet in the onCreate. Try accessing them in a method annotated with @AfterViews, which is guaranteed to be executed after the views have been injected.
for example:
@AfterViews
void checkViews(){
if(src!=null && dest!=null)
Toast.makeText(this, "@ViewById does work!", Toast.LENGTH_SHORT).show();
}