Delete SharedPreferences File

Question

I am allowing the user to create multiple SharedPreferences files, but I also would like the option for them to delete these files. I know I could use internal

Answer 1

Here is an easy method to clear all the SharedPreferences for a given context, usefull for unit-tests

public static void clearSharedPreferences(Context ctx){
    File dir = new File(ctx.getFilesDir().getParent() + "/shared_prefs/");
    String[] children = dir.list();
    for (int i = 0; i < children.length; i++) {
        // clear each preference file
        ctx.getSharedPreferences(children[i].replace(".xml", ""), Context.MODE_PRIVATE).edit().clear().commit();
        //delete the file
        new File(dir, children[i]).delete();
    }
}

Note that when you are using this for Android Unit testing and you are using sharedpreferences in your Application class, this might cause a race condition and it might not work properly.