🎩 Sophisticated Shared Preferences

Use shared preferences in the simplest way. We will unlock the full potential of shared preferences by creating a simple flow to store/retrieve shared preferences, which will be independent of data type.

Shared preferences are used to store data in local storage. This data is persisted in memory and can be used later. Generally shared preferences are used to store info which are non-critical to app.

🔗 Learn more about shared preferences here: shared_preferences

💾 Add Shared Preferences Library

Insert the below code in pubspec.yaml file of your flutter app.

Let's start by creating an Enum file. This Enum will be used to store the keys for our shared preferences data.

🔑 Enum For Keys

The Enum class will store all our preferences keys in one place. This will simplify the process of creating new keys for preferences.

After we have created keys, let’s create getter and setter function for the above Enum class. This will significantly reduce our work for adding preferences.

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Note: We will create PrefRepository class below, so don’t worry for now, as you will get not found error. Later you can import the class and error will be resolved.

The next step is creating methods to save/retrieve our preferences. For this, we will create a Singleton class.

⚙️ Implement Shared Preferences

We need to call PrefRepository init method in our app main function as below. This is very important as it will initialize our shared preferences object, without initialization we will get error while using shared preferences.

Now we will add our getter and setter method for CRUD operations.

We have created getter and setter method to store our data. For example, we create fcmToken setter method to store String FCM token and getFcmToken getter method to retrieve String stored FCM token.

You can add more methods according to your needs. It can be any data from string, integer, boolean, double or any other custom object. To store custom object, convert them to string by using JSON parser.

Below, we have created methods to store/retrieve data of Config class.

🏁 At Last Use Shared Preferences

We will now use the previously created preferences in our flutter app.

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Once we have completed setup of SharedPreferenceEnum and PrefRepository classes, then we can use shared preferences using single object in our entire app. 👏🏻

✅ Full Code

Thank you, and I hope this article helped you in some way. If you like the post, please support the article by sharing it. Have a nice day!👋

I am an mobile enthusiast 📱. My expertise is in Flutter and Android development, with more than 5 years of experience in the industry.

I would love to write technical blogs for you. Writing blogs and helping people is what I crave for 😊 .You can contact me at my email(abdulrehman0796@gmail.com) for any collaboration 👋

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