| # UserFileManager |
| |
| This class is used to generate file paths and SharedPreferences that is compatible for specific OS |
| users in SystemUI. Due to constraints in SystemUI, we can only read/write files as the system user. |
| Therefore, for secondary users, we want to store secondary user specific files into the system user |
| directory. |
| |
| |
| ## Usages |
| |
| Inject UserFileManager into your class. |
| |
| ### fun getFile(fileName: String, userId: Int): File |
| Add a file name and user id. You can retrieve the current user id from UserTracker. This will |
| return a java.io File object that contains the file path to write/read to. |
| |
| i.e. `fileManager.getFile("example.xml", userTracker.userId)` |
| |
| ### fun getSharedPreferences(fileName: String, mode: Int, userId: Int): SharedPreferences |
| Add a file name, user id, and PreferencesMode. You can retrieve the current user id from |
| UserTracker. This returns SharedPreferences object that is tied to the specific user. Note that if |
| the SharedPreferences file does not exist, one will be created automatically. See |
| [SharedPreferences documentation](https://developer.android.com/reference/android/content/Context#getSharedPreferences(java.lang.String,%20int)) |
| for more details. |
| |
| i.e. `fileManager.getSharedPreferences("prefs.xml", userTracker.userId, 0)` |
| |
| ## Handling User Removal |
| |
| This class will listen for Intent.ACTION_USER_REMOVED and remove directories that no longer |
| corresponding to active users. Additionally, upon start up, the class will run the same query for |
| deletion to ensure that there is no stale data. |
| |
