Android Shared Preference

Shared Preference

Shared Preferences allow you to save and retrieve data in the form of key,value pair.

Shared preferences call a method getSharedPreferences() that returns a SharedPreference instance pointing to the file that contains the values of preferences.

The first parameter is the key and the second parameter is the MODE.

Preference Access Three API to Choose.

Methods of Shared Preference

getPreferences()

used from within your Activity, to access activity-specific preferences.

getSharedPreferences()

used from within your Activity (or other application Context), to access application-level preferences.

getDefaultSharedPreferences()

used on the PreferenceManager.

What is Mode ?

mode is the operating mode.

Listout Mode to Apply on Preference.

MODE_PRIVATE

This is default mode, where the created file can only be accessed by the calling application.

MODE_WORLD_READABLE

This mode allow other application to read the preferences.

MODE_WORLD_WRITEABLE

This mode allow other application to write the preferences.

MODE_MULTI_PROCESS

This method will check for modification of preferences even if the Shared Preference instance has already been loaded.

MODE_APPEND

This will append the new preferences with the already existing preferences.

MODE_ENABLE_WRITE_AHEAD_LOGGING

Database open flag. When it is set , it would enable write ahead logging by default.