Filesystem

8.   a.    Store text and binary data in files

b.    Read text and binary data from files

c.

Exercise -1

Store Text in Files

Solution

var textDir = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory,'FileManipulations');

if (! textDir.exists()) {

textDir.createDirectory();

var textFile  = Ti.Filesystem.getFile(textDir.resolve(), 'trainingdetails.txt');

//Create a Buffer

//var buffer = Ti.createBuffer({ length: 1024 });

//var buffer = Ti.createBuffer({ value: "Training progressing" });

textFile.write("forgot last contents", false);

textFile=null;

textDir =null;

}

Exercise - 2

Read Text in Files

Solution

function(){

Ti.API.info('reading text');

//reading the file

var textDir = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory,'FileManipulations');

if (textDir.exists()) {

var textFile  = Ti.Filesystem.getFile(textDir.resolve(), 'trainingdetails.txt');

var blob = textFile.read();

var readText = blob.text;

Ti.API.info('Text from file is '+ readText);

}

};

Exercise -3

Store Binary data

Solution

function(){

var imgVw= Ti.UI.createImageView({

  image:'/appicon.png'

});

Ti.API.info('start storing binary data');

var textDir = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory,'FileManipulations');

if ( textDir.exists()) {

var imgFile  = Ti.Filesystem.getFile(textDir.resolve(), 'appicon7.jpeg');

imgFile.write(imgVw.toBlob(), false);

 Ti.API.info('directory exists');

}

Ti.API.info('stop storing binary data');

};

Exercise -4

Identify the accessible storage locations on the filesystem

Identify the appropriate locations to store data on the filesystem

Determine when the filesystem is the most suitable storage location for your app’s data