CODEWITHSUNDEEP
androidbackwards-compatibility
you786
you786

Reputation: 3550

How does checking the Build Version Code work in Android?

How can checking the build version code work on older devices?

For example, say you are on Honeycomb (v11), and you run this method:

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public void doSomething(){

  // bla bla bla ....
  ...

   if(Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN) // Jelly_Bean is v16)
   {
     addNotificationActions(builder);
   }

}

How would the OS know what Build.VERSION_CODES.JELLY_BEAN is? The Android Lint checker doesn't report any errors here. Perhaps this is resolved at compile time?

Upvotes: 0

Views: 775

Answers (1)

CommonsWare
CommonsWare

Reputation: 1007474

How would the OS know what Build.VERSION_CODES.JELLY_BEAN is?

Because that is a static final int. Your compiled Java code contains the integer value, not the symbol. Hence, at runtime, the if statement is comparing against the compiled-in integer value.

Upvotes: 2

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