-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 8/19/10 14:33 , Amit wrote: > Well yes, I only meant that just the fact of using native code > (over Java) won't be very effective. At least that is the > impression I have (which may be wrong). > > Considering the fact that even native code ultimately runs inside > the Dalvik VM instance, performance gains from use of native code > would be modest, right?
Things are a bit different. As far as I understand, applications in general only run inside the Dalvik VM - which means that e.g. activities, boot code etc... is bytecode. In other words, a 100% native app can't exist in Android. But the NDK allows you to create portions of native code that are called by the app. That is, a flow of operations is always started by the VM, but your native code gets executed directly on the processor. This is more or less the same that happens with JNI in the regular Java JDK. Given that, before moving to native code I'd wait for others to share with you their experience specifically with image processing. PS It's a shame that Google dropped some imaging back-end classes from Harmony, as there are a number of powerful and complete imaging libraries in Java such as JAI. - -- Fabrizio Giudici - Java Architect, Project Manager Tidalwave s.a.s. - "We make Java work. Everywhere." java.net/blog/fabriziogiudici - www.tidalwave.it/people [email protected] -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.14 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkxtKYAACgkQeDweFqgUGxdg6wCgpJM/beTx9U0thsO30tjNh0Mp lOUAnRRBs/XxM9PutV+7KOh7CoLGehE8 =bXS+ -----END PGP SIGNATURE----- -- 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
