[android-developers] Re: Writing to disk
Hi Mark, android:sharedUserId The name of a Linux user ID that will be shared with other applications etc. Where can I find the allowable values for this ID? Thanks On Oct 13, 12:17 pm, Mark Murphy mmur...@commonsware.com wrote: On Wed, Oct 13, 2010 at 12:07 PM, kypriakos demet...@ece.neu.edu wrote: Well these are two separate projects that eventually co-operate with each other using that shared space. So yes if I could give specific access to a particular app to access that space that would be fine. Else, I will need to find another way to approach it. Generating such a shared space on the sdcard is a better idea? If these are two projects of yours, then you can use the android:sharedUserId attribute in your manifest. Give both apps the same user ID and sign both with the same signing key. Then they will run as the same Linux user, and they can access each other's files without further modification. And, the files will still be protected from other apps. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.1 Available! -- 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: Writing to disk
Sorry for the multiple postings - on the same note, do apps generated via the Eclipse Android plug in get automatically signed before they can run on the emulator? Or do they need to be signed before they can be launched on a real device? On Oct 13, 12:17 pm, Mark Murphy mmur...@commonsware.com wrote: On Wed, Oct 13, 2010 at 12:07 PM, kypriakos demet...@ece.neu.edu wrote: Well these are two separate projects that eventually co-operate with each other using that shared space. So yes if I could give specific access to a particular app to access that space that would be fine. Else, I will need to find another way to approach it. Generating such a shared space on the sdcard is a better idea? If these are two projects of yours, then you can use the android:sharedUserId attribute in your manifest. Give both apps the same user ID and sign both with the same signing key. Then they will run as the same Linux user, and they can access each other's files without further modification. And, the files will still be protected from other apps. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.1 Available! -- 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: Writing to disk
Ok you can scream at me now ... everything is explained in http://developer.android.com/guide/publishing/app-signing.html#setup So I am assuming that my original question of how I will be able to sign both apps with the same key is answered by doing so manually for each of the unsigned apks. I never signed these apks before but yet they are running fine on the emulator and the real device so I assumed that the plug in does it automatically in which case I will need to intervene to sign them with the same key before I can used the SharedId. Thanks and again apologies for the multiple postings On Oct 13, 12:17 pm, Mark Murphy mmur...@commonsware.com wrote: On Wed, Oct 13, 2010 at 12:07 PM, kypriakos demet...@ece.neu.edu wrote: Well these are two separate projects that eventually co-operate with each other using that shared space. So yes if I could give specific access to a particular app to access that space that would be fine. Else, I will need to find another way to approach it. Generating such a shared space on the sdcard is a better idea? If these are two projects of yours, then you can use the android:sharedUserId attribute in your manifest. Give both apps the same user ID and sign both with the same signing key. Then they will run as the same Linux user, and they can access each other's files without further modification. And, the files will still be protected from other apps. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.1 Available! -- 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: Writing to disk
He he - I knew I was going to hear all that ;) Well these are two separate projects that eventually co-operate with each other using that shared space. So yes if I could give specific access to a particular app to access that space that would be fine. Else, I will need to find another way to approach it. Generating such a shared space on the sdcard is a better idea? On Oct 12, 5:08 pm, Mark Murphy mmur...@commonsware.com wrote: On Tue, Oct 12, 2010 at 5:04 PM, kypriakos demet...@ece.neu.edu wrote: On a related note - can apps give permissions to other apps to read write from/into their sandboxes? (/data/data/app/files? Yes, but it is a terrible idea. As in epic fail level of terrible. Provide some sort of managed access (remote service via AIDL, command-style IntentService, ContentProvider) to work with the local data. Unless, of course, you don't mind other applications deleting your data, etc. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy Android 2.2 Programming Books:http://commonsware.com/books -- 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
Re: [android-developers] Re: Writing to disk
On Wed, Oct 13, 2010 at 12:07 PM, kypriakos demet...@ece.neu.edu wrote: Well these are two separate projects that eventually co-operate with each other using that shared space. So yes if I could give specific access to a particular app to access that space that would be fine. Else, I will need to find another way to approach it. Generating such a shared space on the sdcard is a better idea? If these are two projects of yours, then you can use the android:sharedUserId attribute in your manifest. Give both apps the same user ID and sign both with the same signing key. Then they will run as the same Linux user, and they can access each other's files without further modification. And, the files will still be protected from other apps. -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.1 Available! -- 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: Writing to disk
You should try Amazon S3. I use it for holding large amounts of app data and and I'm very happy with the performance, reliability, and ease of use. This also makes it easy to share data across any number of phones at the same time, which opens up lots of possibilities for neat app features. -- 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: Writing to disk
That's what I was looking for - thanks. Regarding the storage of files for each app though (yes both apps are mine) should they still be storing their corresponding files in their own sandbox and each of will use the path to each other's space? On Oct 13, 12:17 pm, Mark Murphy mmur...@commonsware.com wrote: On Wed, Oct 13, 2010 at 12:07 PM, kypriakos demet...@ece.neu.edu wrote: Well these are two separate projects that eventually co-operate with each other using that shared space. So yes if I could give specific access to a particular app to access that space that would be fine. Else, I will need to find another way to approach it. Generating such a shared space on the sdcard is a better idea? If these are two projects of yours, then you can use the android:sharedUserId attribute in your manifest. Give both apps the same user ID and sign both with the same signing key. Then they will run as the same Linux user, and they can access each other's files without further modification. And, the files will still be protected from other apps. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.1 Available! -- 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: Writing to disk
That could be another possibility for storing large data off the phone. In this case these are simple config files so I will try Mark's suggestion with ther common user id. Thanks Bret On Oct 13, 12:18 pm, Bret Foreman bret.fore...@gmail.com wrote: You should try Amazon S3. I use it for holding large amounts of app data and and I'm very happy with the performance, reliability, and ease of use. This also makes it easy to share data across any number of phones at the same time, which opens up lots of possibilities for neat app features. -- 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
Re: [android-developers] Re: Writing to disk
On Wed, Oct 13, 2010 at 1:49 PM, kypriakos demet...@ece.neu.edu wrote: That's what I was looking for - thanks. Regarding the storage of files for each app though (yes both apps are mine) should they still be storing their corresponding files in their own sandbox and each of will use the path to each other's space? An app's on-board files get removed when the app gets uninstalled. Hence, each app needs whatever it needs in case the other app gets uninstalled. -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.1 Available! -- 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: Writing to disk
Gotcha - thanks Mark On Oct 13, 1:54 pm, Mark Murphy mmur...@commonsware.com wrote: On Wed, Oct 13, 2010 at 1:49 PM, kypriakos demet...@ece.neu.edu wrote: That's what I was looking for - thanks. Regarding the storage of files for each app though (yes both apps are mine) should they still be storing their corresponding files in their own sandbox and each of will use the path to each other's space? An app's on-board files get removed when the app gets uninstalled. Hence, each app needs whatever it needs in case the other app gets uninstalled. -- Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy _The Busy Coder's Guide to Android Development_ Version 3.1 Available! -- 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: Writing to disk
My bad - the exception is specific to the software I am using. This exception is thrown when a particular file is not created in the sdcard. The thread that writes it does not thrown an exception but simply skips it - which means the original code does not catch it. I will look a bit deeper on this and post what I find. On a related note - can apps give permissions to other apps to read write from/into their sandboxes? (/data/data/app/files? The exception was: 10-10 17:00:41.739 7878 7878 I System.out: P2PA - ## - fatal error : group creation failure 10-10 17:00:41.739 7878 7878 W System.err: net.jxta.exception.PeerGroupException: Could not locate World PeerGroup Module Implementation. 10-10 17:00:41.739 7878 7878 W System.err:at net.jxta.peergroup.WorldPeerGroupFactory.getDefaultWorldPeerGroupClass(WorldPeerGroupFactory.java: 241) 10-10 17:00:41.739 7878 7878 W System.err:at net.jxta.peergroup.WorldPeerGroupFactory.init(WorldPeerGroupFactory.java: 178) 10-10 17:00:41.739 7878 7878 W System.err:at net.jxta.peergroup.NetPeerGroupFactory.init(NetPeerGroupFactory.java: 204) 10-10 17:00:41.739 7878 7878 W System.err:at net.jxta.platform.NetworkManager.startNetwork(NetworkManager.java:410) 10-10 17:00:41.739 7878 7878 W System.err:at com.p2pSOAAndroidP2PA.P2PA.PeerToPeerAdapter.startJxta_2_5(PeerToPeerAdapter.java: 1207) 10-10 17:00:41.739 7878 7878 W System.err:at com.p2pSOAAndroidP2PA.P2PA.PeerToPeerAdapter.main(PeerToPeerAdapter.java: 808) 10-10 17:00:41.739 7878 7878 W System.err:at com.p2pSOAAndroidP2PA.p2pSOAAndroidP2PAAct.onCreate(p2pSOAAndroidP2PAAct.java: 122) On Oct 11, 1:17 pm, TreKing treking...@gmail.com wrote: On Mon, Oct 11, 2010 at 12:08 PM, kypriakos demet...@ece.neu.edu wrote: the same dir path on the real device is throwing exceptions. And the exceptions are ... ? - TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- 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
Re: [android-developers] Re: Writing to disk
On Tue, Oct 12, 2010 at 5:04 PM, kypriakos demet...@ece.neu.edu wrote: On a related note - can apps give permissions to other apps to read write from/into their sandboxes? (/data/data/app/files? Yes, but it is a terrible idea. As in epic fail level of terrible. Provide some sort of managed access (remote service via AIDL, command-style IntentService, ContentProvider) to work with the local data. Unless, of course, you don't mind other applications deleting your data, etc. -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy Android 2.2 Programming Books: http://commonsware.com/books -- 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: Writing to disk
But if I do want to share data between apps the best bet is to avoid putting them in /data/data/app/files and opt to throw them on the sdcard right? What happened is that the app would write data to /sdcard/app on the emulator without issues but the same dir path on the real device is throwing exceptions. On Oct 11, 1:23 am, kypriakos demet...@ece.neu.edu wrote: Hi all, with the emulator I can create directories via my apps and populate them with files (ex. /sdcard) - it seems that I have kind-of root privileges (set by the entry in the manifest file). with the real device I am finding out that this is not possible (??). Would the only space that my apps can write be in predefined app spaces/ sandboxes that Android allows for each installed app? This is the case? Thanks -- 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
Re: [android-developers] Re: Writing to disk
On Mon, Oct 11, 2010 at 12:08 PM, kypriakos demet...@ece.neu.edu wrote: the same dir path on the real device is throwing exceptions. And the exceptions are ... ? - TreKing http://sites.google.com/site/rezmobileapps/treking - Chicago transit tracking app for Android-powered devices -- 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
