bob wrote: > I don't understand why it lets me do something like this in onCreate: > > Context c = Main_Activity.this; >
'Main_Activity' violates the Java naming conventions. > > That sure looks like a static access. No, it doesn't. The 'this' keyword is immediate, conclusive and sufficient evidence that this is not a static access. By itself the presence of a dot is not /prima facie/ evidence of a static access, except by a very naive and uninformed view of the Java language. The syntax to which you refer is that for an outer instance (NOT a class member) when referenced from an inner class. That's just basic Java, which you really ought to know in order to program for Android. > > Justin Anderson wrote: > > What does your code look like? The "this" keyword is not accessed > > statically... it is a member of your class instance. > > > bob wrote: > > > I tried accessing Main_Activity.this, but Eclipse says: > > > > > No enclosing instance of the type Main_Activity is accessible in > > > scope. > That message is as dead giveaway as to what your mistake was. You didn't have an enclosing instance of the type 'Main_Activity' [sic] for that to reference. > > I don't know why it won't let me do it. Because you made an outer-instance reference with no outer instance. Thus there was no enclosing instance of the type 'Main_Activity', just as the error message states. This being illegal, the compiler won't let you do it. > > > Carlos Silva wrote: > > > > "this" on a class that extends Activity isn't simple enough? > You can use 'this' in an instance, but not in a static context. > > > bob wrote: > > > > Why is there no static function like Activity.getCurrentActivity()? > > > > > Right now, I am saving the Activity in a static variable in onCreate > > > > so I can access it easily later on. I suspect there must be a better > > > > way. -- Lew -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
