1) android uses unix file permission on the bottom level. this means each application is started with as a seperate user being able to access data from the corresponding application. unless the users are the same, apps wont be able to access data from other applications
2) sd card is for public data use only. since the partition format is fat, the system is not able to assign unix-like access permission. therefore any application might alter data on the card. 3) if the application can write something, it should also be able to read it. therefore a different approach like handing data over to another application might lead to an appropriete solution. BR, Aubrey Akhilesh Gupta wrote: > Hi > The android dev guide mentions on the Data Storage page that "On > Android, all application data (including files) are private to that > application. " > 1. I wish to know how this is ensured. > 2. Also, does this mean that if an application saves a file on the SD > card, it will not be accessible to any other application? > 3. Another related question, is it possible to save an application's > data in such a way that not even the user can access that data outside > of that application? > > Thanks > Akhilesh Gupta > >
