[android-developers] Re: Use of files
I found the problem! I used the if statement wrong :) But I can confirm you have in Android native code accessibility to local files created in java - files create on application level, where other applications can not see your file! Now I can write to files in native code and read them in java! On Apr 22, 1:17 pm, Mark Murphy wrote: > Do not make the file MODE_WORLD_WRITEABLE unless you don't mind when > people hack your files. > > > > > > > > > > On Fri, Apr 22, 2011 at 4:41 AM,JernejK. wrote: > > Thank you both for your answer! > > > The thing is, in my company we already have working libraries and that > > is the reason why I have to use jni. > > So most of the work is done in native code, most of time I use Java > > for GUI part.. > > > So I think i would be a performance issue (applications is constantly > > managing with changes..I few times in a second) if I were calling from > > native java methods if we write something to a file.. > > > So I will send getFilesDir() to my native library and also change the > > write permission for the file - MODE_WORLD_WRITEABLE (if it really has > > a different ID, then it will be visible for others). I will also post > > this to the NDK group..but thanks again! > > > -- > > 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 > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy > > Android Training in NYC:http://marakana.com/training/android/ -- 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: Use of files
Do not make the file MODE_WORLD_WRITEABLE unless you don't mind when people hack your files. On Fri, Apr 22, 2011 at 4:41 AM, Jernej K. wrote: > Thank you both for your answer! > > The thing is, in my company we already have working libraries and that > is the reason why I have to use jni. > So most of the work is done in native code, most of time I use Java > for GUI part.. > > So I think i would be a performance issue (applications is constantly > managing with changes..I few times in a second) if I were calling from > native java methods if we write something to a file.. > > So I will send getFilesDir() to my native library and also change the > write permission for the file - MODE_WORLD_WRITEABLE (if it really has > a different ID, then it will be visible for others). I will also post > this to the NDK group..but thanks again! > > -- > 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 > -- Mark Murphy (a Commons Guy) http://commonsware.com | http://github.com/commonsguy http://commonsware.com/blog | http://twitter.com/commonsguy Android Training in NYC: http://marakana.com/training/android/ -- 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: Use of files
Thank you both for your answer! The thing is, in my company we already have working libraries and that is the reason why I have to use jni. So most of the work is done in native code, most of time I use Java for GUI part.. So I think i would be a performance issue (applications is constantly managing with changes..I few times in a second) if I were calling from native java methods if we write something to a file.. So I will send getFilesDir() to my native library and also change the write permission for the file - MODE_WORLD_WRITEABLE (if it really has a different ID, then it will be visible for others). I will also post this to the NDK group..but thanks again! -- 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: Use of files
Most likely this is about permissions: the native application (I guess you run it from the shell) is executed under different user ID than your Java application. As a temporary development solution you can get root access and fix it but I would recommend to avoid using native code unless for the JNI level. -- 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
