Write To and Read From File In Flutter

In Flutter you will get scenario for how to write and read from files. This is how you will achieve.

Write to File

• Follow the steps from previous?tips?to create folder and files.
• Use?.writeAsString()?method to write to Files.

final File file = File(<path>);

file.writeAsString(<data>);

if (await Permission.manageExternalStorage.isGranted){
    final path = Directory('/storage/emulated/0/30FlutterTips/');
	String res = "";

	if (await path.exists()){
      res = path.path;
	 } else {
	    final Directory  appDocDirNewFolder = await path
                 .create(recursive: true);
	    res = appDocDirNewFolder.path;
    }	
 
    final File file = File("${res}tips22.dart");
    await file.writeAsString(controller.text.toString());
} else {
	await Permission.manageExternalStorage.request();
  }        

Read From File

For reading text from file, we can use the following methods:

• .readAsString()
• .readAsLines()

File(<path>).readAsString();

if (await Permission.manageExternalStorage.isGranted){
	await File("/storage/emulated/0/30FlutterTips/tips22.dart")
	  .readAsString();
 } else {
	  await Permission.manageExternalStorage.request();     
 }        

The whole code had been uploaded here:

https://github.com/lakshydeep-14/30FlutterTips

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