async_storage_local 0.0.2

Async Storage Local

The package Async_Storage_Local is to save/write and read a string to local storage. If you are familiar with AsyncStorage in React/React Native, this is a close counter part in flutter environment. It's a class with three functionalities of write/save, read, and delete. Declare a class variable in your STATEFUL widget with "keyFile" property. Then, saving and reading are done by .saveSting() and .readString() respectively. It saves data in String format. If your data is in json format, stringify (via jsonEncode) the json data to store/save and convert the retrieved data to json format via jsonDecode. It was tested fine with a couple of kB of data string. The file can be deleted.

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Features

• Easy to save/write and read a String data to local storage.
• Delete the file if not necessary.
• Multiple files can be created to save multiple strings.

• Youtube link: https://www.youtube.com/watch?v=BJzjEvW7tTo

Getting started

The parent Widget should be stateful. Install the package and import the package into any file of interest. Then follow the "Usage."

Github provide an example.

Usage

Run the command to add intp the pubspec.yaml:

flutter pub add async_storage_local

Import the package:

import 'package:async_storage_local/async_storage_local.dart';

• The parent widget calling the package should be STATEFUL

• declare your local AsyncStorageLocal and dataStringRetrieved: _ eg:

  AsyncStorageLocal fileSetting =AsyncStorageLocal(keyFile: 'settings');
  String dataStringRetrived='';
  //optional
  String fileDeleted='';
  

• Place the code set in any place taking functions (eg, onPress, initState,-blocks):

  InkWell(
      onTap: (){
          fileSetting.saveString('Lang: English');
      },
      child: const Text(
      'Save settings on keyFile',
      ),
  ),
  

• To retrieve the string use .readSting()

  onTap:(){
      fileSetting.readString().then((value) {
          setState((){
          dataStringRetrived=value;
          });
      });
      },
  

  _ Then, the retrieved string is "dataStringRetrived". The data is accessed like:

      ...
      Text(dataStringRetrieved,style:TextStyle(...)),
      ...
  

  _ As state earlier, the dataStringRetrived needs to be decoded to convert into a json if the saved is an encoded json. The data string size can be a couple of kB.

_ The file (in this example 'settings') can be deleted as follows: dart ... onTap:(){ fileSetting.delete().then((value) { setState((){ fileDeleted=value; }); }); }, The deleted file name is available via 'fileDeleted'. When the file ('settings') is deleted, readString() returns an empty string of"".

Additional information

• Multiple files can be created and managed.

Please refer to my Github site and Youtube clip for details.

async_storage_local