shared_preferences_cache 0.1.0

A Cache based on Shared Preferences

shared_preferences_cache

A Cache for Flutter based on Shared Preferences. It is similar to the package flutter_cache_manager but instead of caching cache downloaded files, shared_preferences_cache can cache plain values (int, double, string, bool). This comes in handy if you want to cache a result of an expensive operation or of an API call which cannot be cached with flutter_cache_manager.

Usage

To use this plugin, add shared_preferences_cache as a dependency in your pubspec.yaml file.

Example

import 'package:shared_preferences_cache/shared_preferences_cache.dart';

void main() async {
    SharedPreferencesCache spc = await SharedPreferencesCache.getInstance(Duration(days: 5));

    String myCachedValue = await spc.getString(key, () {
      // This code will only be executed if...
      // 1. No value for the given key exists in the cache
      // or
      // 2. The cached value is older then the provided maxAge (5 days in this example)
      return someExpensiveOperation();
    });
}

To Do

• Proper API documentation

Known Issues

• The library is not thread-safe. When used in parallel it can happen that the key and value pairs fall apart