Shared Preferences in Android

Overview

Shared Preference is a way to store and receive primitive data in the form of key-value pair.

Steps to follow

• Create an instance of Shared Preference

 SharedPreferences sharedPreference = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
 SharedPreferences.Editor editor = sharedPreference.edit();

• Add the data in the form of Key/Value pair in the Editor

 editor.putInt("key", value);
 editor.apply();

• To get the data from Shared Preference

 SharedPreferences sharedPreference = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
 sharedPreference.getInt("key", defaultValue);

• To clear data from Shared Preference

 SharedPreferences sharedPreference = context.getSharedPreferences(PREF_NAME, Context.MODE_PRIVATE);
 SharedPreferences.Editor editor = sharedPreference.edit();
 editor.clear();
 editor.apply();

• Hello World

Do's and Dont's

• If you are creating a Shared Preference, create a separate class for it and provide the object with the help of a synchronized method.

 public static synchronized SharedPrefManager getInstance(Context context) {
    if (mInstance == null) {
        mInstance = new SharedPrefManager(context);
    }
    return mInstance;
 }

• Hello World!!!

Reference

1. https://www.geeksforgeeks.org/shared-preferences-in-android-with-examples/