How to get object type of preference in Android?

Question

I can get a String from the shared preferences by using:

sharedPreferences.getString("key_name","default value");

But how can I check if key_name is actually a String?

What if it is a Boolean key value?

Is there a method we can use like:

if(sharedPreferences.isTypeOf(Boolean,"key_name")) {}

Answer 1

If you know you will get a boolean you can use

sharedPreferences.getBoolean("key_name",true);

Otherwise you can do (not tested, based on doc)

Map<String, ?> all = sharedPreferences.getAll();
if(all.get("key_name") instanceof String) {
    //Do something
}
else if(all.get("key_name") instanceof Boolean) {
    //Do something else
}

But you are suppose to know what you stored in your SharedPrefrences