Dianne, what's wrong with checking version number? Unless there's some problem with it I'd suggest going with Mark's solution (also covered in http://devtcg.blogspot.com/2009/12/gracefully-supporting-multiple-android.html). You can use it for most cases and it's much cleaner (and definitely stay away from reflection-based one unless, for some reason, there's no other choice).
Cheers, Max On 21 April 2010 01:43, Dianne Hackborn <hack...@android.com> wrote: > > http://android-developers.blogspot.com/2009/04/backward-compatibility-for-android.html > > Or actually it appears this has become a tech article: > > http://developer.android.com/resources/articles/backward-compatibility.html > > > <http://developer.android.com/resources/articles/backward-compatibility.html>The > last section, "Using a wrapper class," talks about this. > > On Tue, Apr 20, 2010 at 5:01 PM, Christopher < > christopher.t.mor...@gmail.com> wrote: > >> Diane, >> >> Can you please explain what blog post you're referring to in your >> post? >> >> On Apr 20, 2:26 pm, Dianne Hackborn <hack...@android.com> wrote: >> > I suggest not using the SDK version, but just use the trick in the blog >> post >> > to detect if the class doesn't exist before trying to use it. >> > >> > >> > >> > >> > >> > On Tue, Apr 20, 2010 at 1:00 PM, kec6227 <kec6...@gmail.com> wrote: >> > > Oh ok, that makes perfect sense. Thank you. >> > >> > > On Apr 20, 12:11 pm, Mark Murphy <mmur...@commonsware.com> wrote: >> > > > kec6227 wrote: >> > > > > Using? a wrapper class of sorts? If I initiate the >> WallpaperManager >> > > > > anywhere in my code, it will throw a VerifyError on older >> platforms, I >> > > > > tried something like this: >> > >> > > > > if(Integer.parseInt(Build.VERSION.SDK) >= 5){ >> > > > > WallpaperManager wallMan.. >> > > > > ...blah blah >> > > > > } >> > >> > > > > The only way it does not throw a verifyerror is when I don't use >> the >> > > > > WallpaperManager anywhere. >> > >> > > > That's not strictly true. You only will get a VerifyError if you >> load a >> > > > class that refers to WallpaperManager. >> > >> > > > So, the trick is to use reflection or conditional class loading to >> only >> > > > load your code referencing WallpaperManager on suitable versions. >> > >> > > > For example: >> > >> > > > if(Integer.parseInt(Build.VERSION.SDK) >= 5){ >> > > > new MyWallpaperBridge().goDoSomething(); >> > >> > > > } >> > >> > > > Or, create an interface and two implementations, and choose the >> > > > implementation based on the version, as seen here: >> > >> > > > >> http://github.com/commonsguy/cw-advandroid/tree/master/Contacts/Spinn... >> > >> > > > -- >> > > > Mark Murphy (a Commons Guy)http://commonsware.com| >> > >http://twitter.com/commonsguy >> > >> > > > Android Training in US: 14-18 June 2010:http://bignerdranch.com >> > >> > > > -- >> > > > 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<android-developers%2bunsubscr...@googlegroups.com><android-developers%2Bunsubs >> cr...@googlegroups.com> >> > > > For more options, visit this group athttp:// >> > > groups.google.com/group/android-developers?hl=en >> > >> > > -- >> > > 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<android-developers%2bunsubscr...@googlegroups.com><android-developers%2Bunsubs >> cr...@googlegroups.com> >> > > For more options, visit this group at >> > >http://groups.google.com/group/android-developers?hl=en >> > >> > -- >> > Dianne Hackborn >> > Android framework engineer >> > hack...@android.com >> > >> > Note: please don't send private questions to me, as I don't have time to >> > provide private support, and so won't reply to such e-mails. All such >> > questions should be posted on public forums, where I and others can see >> and >> > answer them. >> > >> > -- >> > 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<android-developers%2bunsubscr...@googlegroups.com> >> > For more options, visit this group athttp:// >> groups.google.com/group/android-developers?hl=en >> >> -- >> 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<android-developers%2bunsubscr...@googlegroups.com> >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> > > > > -- > Dianne Hackborn > Android framework engineer > hack...@android.com > > > Note: please don't send private questions to me, as I don't have time to > provide private support, and so won't reply to such e-mails. All such > questions should be posted on public forums, where I and others can see and > answer them. > > -- > 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<android-developers%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- 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
