[android-developers] Re: how to get notified(or Listen) for the changes in SD card
try FileObserver, it may help u --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: how to get notified(or Listen) for the changes in SD card
http://developer.android.com/reference/android/os/FileObserver.html But trying to watch for any change on any file is potentially extremely expensive, since you need to be monitoring every single directory on the file system, and updating what you are monitoring as directories are created or removed. This is just a fundamental aspect of how file monitoring works on Linux, so there is not much to do about it. I would strongly suggest trying to find some other approach that does not require monitoring the entire file system. :} On Thu, Aug 13, 2009 at 12:36 PM, Casper Bang wrote: > > Filesystem monitoring is only provided in Java in the NIO2 stuff > coming with Java 7. Android supports a subset of Java 6 so perhaps you > can port this over yourself by looking at their source. As far as I > know though, even the NIO2 will often need to use constant polling > which would absolutely kill the battery life of an Android device I > think. > > So the real question is whether it's possible to hook into some native > Android services and be notified regarding writes to /sdcard but I > fear, if even possible, this require a rooted phone. > > /Casper > > On 13 Aug., 21:05, "Mapara,Harshit Nitinkumar" > wrote: > > Hi All, > > > > I am creating an app and the requirement is - I have to listen to the > > SD card for new data comes in. > > > > Whenever a new file is downloaded into SD card , I want to be notified. > > (or say , I want to listen for changes) > > > > I searched, but can't get any useful help. > > > > Please help me in this issue. > > > > Any code sample, link will be nice to have. > > > > Thanks > > Harshit > > > -- Dianne Hackborn Android framework engineer hack...@android.com Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: how to get notified(or Listen) for the changes in SD card
Can you guys please tell me, how do I use intent - ACTION_MEDIA_EJECT? How do I get notified if Media card(sd card) is ejected or mounted ? I came to know of using this by intent action and broad cast receiver, but dont know how to do this actually. Thanks On Aug 13, 12:36 pm, Casper Bang wrote: > Filesystem monitoring is only provided in Java in the NIO2 stuff > coming with Java 7. Android supports a subset of Java 6 so perhaps you > can port this over yourself by looking at their source. As far as I > know though, even the NIO2 will often need to use constant polling > which would absolutely kill the battery life of an Android device I > think. > > So the real question is whether it's possible to hook into some native > Android services and be notified regarding writes to /sdcard but I > fear, if even possible, this require a rooted phone. > > /Casper > > On 13 Aug., 21:05, "Mapara,Harshit Nitinkumar" > wrote: > > > > > Hi All, > > > I am creating an app and the requirement is - I have to listen to the > > SD card for new data comes in. > > > Whenever a new file is downloaded into SD card , I want to be notified. > > (or say , I want to listen for changes) > > > I searched, but can't get any useful help. > > > Please help me in this issue. > > > Any code sample, link will be nice to have. > > > Thanks > > Harshit --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: how to get notified(or Listen) for the changes in SD card
Filesystem monitoring is only provided in Java in the NIO2 stuff coming with Java 7. Android supports a subset of Java 6 so perhaps you can port this over yourself by looking at their source. As far as I know though, even the NIO2 will often need to use constant polling which would absolutely kill the battery life of an Android device I think. So the real question is whether it's possible to hook into some native Android services and be notified regarding writes to /sdcard but I fear, if even possible, this require a rooted phone. /Casper On 13 Aug., 21:05, "Mapara,Harshit Nitinkumar" wrote: > Hi All, > > I am creating an app and the requirement is - I have to listen to the > SD card for new data comes in. > > Whenever a new file is downloaded into SD card , I want to be notified. > (or say , I want to listen for changes) > > I searched, but can't get any useful help. > > Please help me in this issue. > > Any code sample, link will be nice to have. > > Thanks > Harshit --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: how to get notified(or Listen) for the changes in SD card
You might want to look at the following java libraries and see whether you can port one of them to Android. http://www.rgagnon.com/javadetails/java-0617.html Another way might be to execute system commands like stat (for which you have to be root which makes it more complicated to use it from SDK level) -- Roman Baumgaertner Sr. SW Engineer-OSDC ·T· · ·Mobile· stick together The views, opinions and statements in this email are those of the author solely in their individual capacity, and do not necessarily represent those of T-Mobile USA, Inc. On Aug 13, 12:05 pm, "Mapara,Harshit Nitinkumar" wrote: > Hi All, > > I am creating an app and the requirement is - I have to listen to the > SD card for new data comes in. > > Whenever a new file is downloaded into SD card , I want to be notified. > (or say , I want to listen for changes) > > I searched, but can't get any useful help. > > Please help me in this issue. > > Any code sample, link will be nice to have. > > Thanks > Harshit --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
