The MainActivity.java file is used to save and retrieve the data through keys. The three buttons implement their respective onClicks in the MainActivity. The activity_main.xml layout consists of two EditText views which store and display name and email.
There are 2 version of Preference Support Library: v7 and v14. PreferenceFragmentCompat have some extra features like methods like setDivider and setDividerHeight. This class was deprecated in API level P. Remove(“key_name”) is used to delete that particular value.Įditor.remove("name") // will delete key nameĮditor.remove("email") // will delete key email Technically PreferenceFragment is supported on Android 3.0 (API level 11) and higher. Pref.getBoolean("key_name", null) // getting boolean Pref.getLong("key_name", null) // getting Long Pref.getFloat("key_name", null) // getting Float Pref.getInt("key_name", -1) // getting Integer Pref.getString("key_name", null) // getting String SharedPreferences pref = getApplicationContext().getSharedPreferences("MyPref", 0) // 0 - for private modeĮmit() is used in order to save changes to shared preferences.Įditor.putBoolean("key_name", true) // Storing boolean - true/falseĮditor.putString("key_name", "string value") // Storing stringĮditor.putInt("key_name", "int value") // Storing integerĮditor.putFloat("key_name", "float value") // Storing floatĮditor.putLong("key_name", "long value") // Storing longĭata can be retrieved from saved preferences by calling getString() as follows:
The following code can be used to get the shared preferences. We need an editor to edit and save the changes in shared preferences. When it is set, it would enable write ahead logging by default MODE_ENABLE_WRITE_AHEAD_LOGGING: Database open flag.MODE_APPEND: This will append the new preferences with the already existing preferences.MODE_MULTI_PROCESS: This method will check for modification of preferences even if the Shared Preference instance has already been loaded.MODE_WORLD_WRITEABLE: Creating world-writable files is very dangerous, and likely to cause security holes in applications.