How do you save/store objects in SharedPreferences on Android?

Question

I need to get user objects in many places, which contain many fields. After login, I want to save/store these user objects. How can we implement this kind of scenario?

I can't store it like this:

SharedPreferences.Editor prefsEditor = myPrefs.edit(); prefsEditor.putString("BusinessUnit", strBusinessUnit); 

Answer 1

You can use gson.jar to store class objects into SharedPreferences. You can download this jar from google-gson

Or add the GSON dependency in your Gradle file:

implementation 'com.google.code.gson:gson:2.8.8' 

you can find latest version here

Creating a shared preference:

SharedPreferences  mPrefs = getPreferences(MODE_PRIVATE); 

To save:

MyObject myObject = new MyObject; //set variables of 'myObject', etc.  Editor prefsEditor = mPrefs.edit(); Gson gson = new Gson(); String json = gson.toJson(myObject); prefsEditor.putString("MyObject", json); prefsEditor.commit(); 

To retrieve:

Gson gson = new Gson(); String json = mPrefs.getString("MyObject", ""); MyObject obj = gson.fromJson(json, MyObject.class);