Thanks Mark, all works well as directed. On Dec 21, 12:47 pm, Mark Murphy <[email protected]> wrote: > Mark Wyszomierski wrote: > > Hi, > > > I'm using the level 5 sdk to compile my app, but set my target to sdk > > level 3 in my manifest. All is fine. > > > I may need to use some level 5 classes (ExifInterface) though. What's > > the right way to go about using them while not fouling things up for > > devices running older sdk versions? Do we simply restrict use of the > > newer API methods to completely separate class files? Something like > > this: > > > // Test.java > > class Test > > { > > public boolean sdkDependentItem() { > > if (Build.VERSION.SDK.equals("5")) { > > return (new sdk5()).getItem(); > > } > > else { > > return (new sdk3and4()).getItem(); > > } > > } > > } > > > // sdk5.java > > class sdk5 { > > public boolean getItem() { > > // can use sdk level 5 apis in here ok. > > } > > } > > > // sdk3and4.java > > class sdk3and4 { > > public boolean getItem() { > > // can use sdk level 3 and 4 apis in here ok. > > } > > } > > > so as long as the api methods are completely separated into files that > > the older devices won't invoke, we should be ok? > > I wouldn't do: > > if (Build.VERSION.SDK.equals("5")) { > > Instead, parse it to an integer and do a >=5 comparison. After all, most > DROIDs are now on API 6 (i.e., Android 2.0.1). And, once you drop older > SDK support, you can use SDK_INT and skip the parse step. > > If you are going to make the request a lot, you might consider having > your two implementations extend a common abstract class or implement a > common interface. Then, you can make the determination of which one to > use once and hold onto that object, calling it by the common interface > as needed. > > Otherwise, the notion of "if I don't load the class, there will be no > harm in it referencing newer API capabilities" is sound. > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://twitter.com/commonsguy > > _The Busy Coder's Guide to Android Development_ Version 2.8 > Available!
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