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 <[email protected] > wrote: > Diane, > > Can you please explain what blog post you're referring to in your > post? > > On Apr 20, 2:26 pm, Dianne Hackborn <[email protected]> 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 <[email protected]> wrote: > > > Oh ok, that makes perfect sense. Thank you. > > > > > On Apr 20, 12:11 pm, Mark Murphy <[email protected]> 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 > [email protected] > > > > To unsubscribe from this group, send email to > > > > [email protected]<android-developers%[email protected]><android-developers%2Bunsubs > [email protected]> > > > > 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 > [email protected] > > > To unsubscribe from this group, send email to > > > [email protected]<android-developers%[email protected]><android-developers%2Bunsubs > [email protected]> > > > For more options, visit this group at > > >http://groups.google.com/group/android-developers?hl=en > > > > -- > > Dianne Hackborn > > Android framework engineer > > [email protected] > > > > 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 [email protected] > > To unsubscribe from this group, send email to > > [email protected]<android-developers%[email protected]> > > 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 [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- Dianne Hackborn Android framework engineer [email protected] 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 [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
