[AC-1729] Application hard-resets when saving an image file to internal storage

Worst possible scenario - an intermittent fault! It mostly fails but occasionally will work! I am downloading Facebook Profile Pictures and trying to save them to the ApplicationDataDirectory (but any internal directory would be fine!) The file is received and then the app does a hard reset and restarts. No 'rsod' or java exceptions, it just restarts! Eventually after enough restarts it will have actually successfully saved all of the required profile pictures. NO, the number of restarts does NOT correlate to the number of pictures required - the number of restarts is much higher and variable / random. Once it has managed to save all the profile pictures, they all load perfectly without issue. The restart occurs when trying to actually write the file to the filesystem. I have tested the code by commenting out various sections and lines to see what causes the crash and it is the 'file.write()' command that does it! I know I could just download the pictures on the fly as a workaround but that's 1) slow, 2) uses up users' monthly data allowance and 3) is plastering over a crack! The problem occurs on 2 completely different, unrelated Android devices from different manufacturers with different Android versions. Yes, the function IS being sent correct Facebook account data, held in friendsArray[friendCount].id Many thanks in advance, Robin

getAllProfilePictures = function(friendCount){

	var playerToGet = friendsArray[friendCount].id;
		
	var pictureFile = Ti.Filesystem.getFile(Ti.Filesystem.applicationDataDirectory, playerToGet +'.jpg');
	if (!pictureFile.exists()){
	
		var xhr = Ti.Network.createHTTPClient();
		
		xhr.onload = function(){

			holder = this.responseData;
			pictureFile.write(holder);
			pictureFile = null;
			if(friendCount > 0 ) {
				friendCount-=1;
				getAllProfilePictures(friendCount);
			} else {
				return;
			};
		};

		xhr.open('GET', 'https://graph.facebook.com/' + playerToGet + '/picture');
		xhr.send();	
	
	} else if(friendCount > 0 ) {
				pictureFile = null;
				friendCount-=1;
				getAllProfilePictures(friendCount);
			} else {

				return;
			};

};  //  End Get All Profile Pictures Function