OK,because no body answer this question on the other forum,so i have to change another forum to ask the same question,since somebody may be answer this question
And,i search this topic by google, and get some info like this: As one of the key infrustructure, Android Binder provide one of the IPC mechanism in Android system. Some people thought that Android Binder reused the Open Binder released by ACCESS/PalmOS and studied the mechanism based on the documents on http://www.angryredplanet.com/~hackbod/openbinder/docs/html/index.html. 1. Difference between Android Binder & OpenBinder Then what's the difference between Android Binder and OpenBinder? What is the functionalities and position in Android? And how many IPC mechanism are provided in Android system? As android engineer said: "the OpenBinder docs on http://www.angryredplanet.com/~hackbod/openbinder/docs/html/index.html refer to a very different version of the Binder. What we have in Android is similar in concept, but shares none of the same code (we had to rewrite everything because the OpenBinder implementation is MPL and our code needs to use the Apache 2.0 license), and is very stripped down in functionality to do only the things we needed in Android. Also technically none of this has anything to do with Dalvik, but is in a layer above Dalvik and part of the Android platform libraries. The main API for interacting with the Binder is android.os.IBinder and android.os.Binder." The basic hirerarchy looks like this: Android platform libraries android.os.IBinder, android.os.Binder.... middle layer including Binder... Dalvik 2. IPC mechanism in Android And there are also several mechanism for IPC as below: (1). For native code, you have most everything Linux 2.6 provides. (2). For code written in Java, you have the typical socket / nio calls. (3). In addition, you have the Binder calls. In a word, Which you use depends on what features you need, what you plan to interact with, and how portable you want it to be not only via JNI/Java APIs. On 3月31日, 下午8时05分, Jean-Baptiste Queru <[email protected]> wrote: > Please don't cross-post. > > Thanks, > JBQ > > On Tue, Mar 31, 2009 at 1:12 AM, Bai.Luo <[email protected]> wrote: > > > what is the advantage and special feature of Binder in android? > > -- > Jean-Baptiste M. "JBQ" Queru > Android Engineer, Google. > > Questions sent directly to me that have no reason for being private > will likely get ignored or forwarded to a public forum with no further > warning. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
