Thanks for the details Can u please guide me in using the libc APIs Are there any APIs in libc related to media framework. If i want to enhance media framework, can i do it ?
Regards Amit On Dec 6, 10:10 am, "Joe Onorato" <[EMAIL PROTECTED]> wrote: > I'm going to restate what Dave said a little stronger -- > > We may decide to change an unpublished API with or without good reason, or > for no reason at all. Don't use them in apps. Here are some reasons we > might change remove them: > > - We decide that since they're unpublished, and not used on a particular > device, we might remove it for size constraints. > - The unpublished API is refactored in order to implement something else > better. > - We want to pubilsh it, and to make it more supportable, we have to change > it. > - For binary code, we could change to a different ABI. > - I just don't like it. > > Like Dave said, this goes for all java APIs that aren't explicitly in the > docs, and for all native code at this point. This article by Martin Fowler > is a good description of what we're trying to accomplish by defining > supported public APIs. http://martinfowler.com/ieeeSoftware/published.pdf > The corollary here is that we do plan on making sure that the published APIs > are around as long as the Android platform is around. > > We do plan on doing a native development kit, but like it's already been > said, there are a lot of gotchas, including instruction set differences > between different devices, and before we put something out and tell people > to use it, we want to make sure that we can support it. > > If what you're writing is intended to be shipped installed on one particular > phone, then you probably have some flexibility, but even then, you could be > broken by system updates, unless make sure that your app is updated too. > > -joe > > On Fri, Dec 5, 2008 at 11:43 PM, Dave Sparks <[EMAIL PROTECTED]>wrote: > > > > > > > We may decide to change an unpublished API in the future if there is a > > good reason for doing so. For example, the native audio API's are > > going to change in a future release to facilitate some improvements we > > want to make in that area. This goes as well for Java API's that > > aren't public in the SDK. > > > If you write a shared library (.so) that is linked against a native > > API that changes, that .so is not going to load which will lead to > > exceptions in the Java code for object method references that are > > unresolved by the linker. > > > On Dec 5, 12:55 am, Amit <[EMAIL PROTECTED]> wrote: > > > Thanks for the help. > > > > I want to know what it means by breaking the code in this context. > > > And can u please guide me about Android libc, what it is, what are the > > > related APIs. > > > > Regards > > > Amit > > > > On Dec 2, 9:34 pm, Dave Sparks <[EMAIL PROTECTED]> wrote: > > > > > We do not support using native code in SDK 1.0, and it's very likely > > > > that any code you write that depends on native classes other than > > > > Android libc is going to break in the future. > > > > > With that caveat in mind, you are more or less on the right track. Any > > > > file with the pattern android_xxx_yyy.cpp is a JNI implementation for > > > > a Java class that relies on native code (where xxx is the package name > > > > and yyy is the class). In the case of android_media_MediaPlayer.cpp, > > > > it relies on a native class MediaPlayer whose header file and > > > > implementation are here: > > >http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob;.... > > .. > > > > > However, this one is pretty complicated as a starting point because it > > > > uses binder IPC to talk to a server process that does the actual work. > > > > You might want to start with something simple like: > > > > >http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob;. > > .. > > > > > On Dec 2, 2:15 am, Amit <[EMAIL PROTECTED]> wrote: > > > > > > Android supports JNI at application framework level. > > > > > For example, in platform/frameworks/base.git, Mediaplayer.java at: > >http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob;... > > > > > file has got some native function calls > > > > > And these native function calls must be implemented in either > > > > > libmedia_jni.so or media_jni.dll > > > > > but i'm unable to located either of the files in the source code. plz > > > > > tell me the path if they are present in the source code. > > > > > > i found a c++ file android_media_MediaPlayer.cpp at: > >http://android.git.kernel.org/?p=platform/frameworks/base.git;a=blob;... > > > > > that implements the corresponding native functions, > > > > > but coudnt find how it calls the actual c/c++ libraries. Also, it > > > > > includes files media/mediaplayer.h which i coudnt find. > > > > > This must be the file generated by java file using javah. > > > > > > It also included files JNIHelp.h and android_runtime/AndroidRuntime.h > > > > > which are also untraceable. > > > > > Plz help me in this problem. > > > > > > Thanks > > > > > Amit > > > > > > On Dec 1, 9:44 am, Amit <[EMAIL PROTECTED]> wrote: > > > > > > > Thanks for the help > > > > > > > I want to know that if i write some piece of code in any languagge > > may > > > > > > be C or even Java, > > > > > > how can i integrate it in android SDK. How can it be called like > > other > > > > > > android APIs. > > > > > > > For example, if i write some framework like video playback frame > > work > > > > > > in any language, > > > > > > how can it be integrated with android framework so that > > applications > > > > > > can make use of it like other APIs. > > > > > > Are there any specifications for such code to be written. > > > > > > > If it cant be done this way, can u tell me if there is a way > > possible > > > > > > for me to integrate it with my local SDK > > > > > > so that my applications can make use of it. Does eclipse provide > > any > > > > > > help in integratiing such source code. > > > > > > > Any Help Appreciated > > > > > > > Thanks & Regards > > > > > > Amit > > > > > > > On Nov 30, 9:06 pm, "Josh Roesslein" <[EMAIL PROTECTED]> wrote: > > > > > > > > Keep in mind Android does not support JNI. So right now its not > > possible to > > > > > > > use C/C++ code > > > > > > > in your Android applications. > > > > > > > > On Sun, Nov 30, 2008 at 4:02 AM, GnuHash <[EMAIL PROTECTED]> > > wrote: > > > > > > > > > Build a shared lib out of your c code that has a JNI interface. > > Load > > > > > > > > the lib from your java code and then invoke your functions via > > JNI. > > > > > > > > > GnuHash > > > > > > > > > Amit wrote: > > > > > > > > > Hello friends, > > > > > > > > > > Can u plz tell that if i want to write some piece of code for > > android > > > > > > > > > in c or c++, how can i integrate the code with java code. > > > > > > > > > > Any help appreciated > > > > > > > > > > Thanks > > > > > > > > > Amit- Hide quoted text - > > > > > > > > - Show quoted text -- Hide quoted text - > > > > > > > - Show quoted text -- Hide quoted text - > > > > > - Show quoted text -- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "android-framework" group. 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