Tizen Developers

Thanks for the reply. Firstly how is it possible to store the data to file? Secondly what do you mean with SAP?

Yeah, you can also store on file.

The follow code will save the file to the private location "wgt-private".

var location = "wgt-private",
    localDB = localStorage.getItem('hrtdata');

function onsuccess(dir) {
    var file = null;
    try { // create new file
        file = dir.createFile('data.txt');
        if(file !== null)
        {
            file.openStream("w", function(stream) {
                stream.writeFile(localDB);
                stream.close();
            }, function(error) {
                alert("write to file failed");
                
            }, 'UTF-8');
        }
    }
    catch (e) { // file already exist -> append content
        file = dir.resolve('data.txt');
        if(file !== null)
        {
            file.openStream("a", function(stream) {
                stream.writeFile("-------");
                stream.writeFile(localDB);
                stream.close();
            }, function(error) {
                alert("write to file failed");
                
            }, 'UTF-8');
        }
    }
}

function onerror(error) {
    alert("failed to open location");
}

tizen.filesystem.resolve(location, onsuccess, onerror);

SAP stands for Samsung Accessory Protocol and is a communication way between Provider (HostApp) and Consumer (GearApp)

The only way is to store the data in a Galaxy device? Is there a possibility to send the data either from local storage or from text  with SAP to a pc? 

Yes, SAP only allows communication between HostApp on Android and Gear-device.. Replace in the code the location to "documents" or "others" and it will export to the "MyFiles"... Than you can copy the file to pc via USB.

Ok I got it. One last question, the function that calculates and shows heart rate is the following:

var updateChart = function (heartrate) {
    	time = new Date().getTime() - initial;
		console.log("[" + time + ", " + heartrate + "]");
		tizen.filesystem.resolve(location, onsuccess, onerror);
		dps.push({
			x: time / 1000.0,
			y: heartrate
		});
		if (dps.length > dataLength)
		{
			dps.shift();				
		}
		var second = Math.round(time / 1000.0);
		console.log(history.length);
		if(lastSecond != second) {
			// TODO use avg heart rate instead of smapshot.
			history.push({
				x: second,
				y: heartrate
			});
			if(history.length > historyDataLength) {
				history.shift();
			}
			lastSecond = second;
		}

		if(dps.length >= dataLength) {
			chart.render();
		}
		var hrchart = "<center>" + heartrate + "bps</center><table width='100%' cellpadding=4px>";
		for(var i = history.length - historyDataLength; i >= 0 && i < history.length; i++) {
			hrchart += "<tr><td align='right' width='50%'>" + history[i].x + "s</td><td width='50%'>" + history[i].y + "bps</td></tr>";
		}
		hrchart += "</table>";
		$('#tex

How can I store this heartrate variable to localstore and afterthat to the text file?

You can also write always directly to the file if you want... You dont need to store the data in localStorage...

The localStorage can save only strings... 

I use in my most app the following usage to store and load data

// save
function save(key, value) {
    var data = load(key),
        saveObject = {};
    
    if(!data) {
        saveObjects.results = [value];
    }
    else {
        saveObjects.results = data.results;
        saveObjects.results.push(value);
    }

    localStorage.setItem(key, JSON.stringify(saveObjects));
}

// load
function load(key) {
    var data = localStorage.getItem(key);

    if(!data) {
        localStorage.setItem(key, JSON.stringify({"results": []}));
        data = localStorage.getItem(key);
    }

    return JSON.parse(data);
}

OK but where in my code should I add tizen.filesystem.resolve(location, onsuccess, onerror); function in order to store the localStorage Data?

I am using your code in order to store heartrate inside the function(heartrate) 

var updateChart = function (heartrate) {
    	time = new Date().getTime() - initial;
		console.log("[" + time + ", " + heartrate + "]");
		if(heartrate != null){
			save("hrm", heartrate);
		}
		//localStorage.setItem("hrm", heartrate);
...
}

//in order to store the localstorage to data
var location = "documents",
localDB = localStorage.getItem('hrm');
window.webapis.motion.start("HRM", onchangedCB);
tizen.filesystem.resolve(location, onsuccess, onerror);

However I am getting error for the save function: TypeError: 'undefined' is not an object (evaluating 'saveObjects.results.push')

I got a mistake in my code above! 

The variable calls "saveObject" not "saveObjects" --- just remove the s from the variable at the end :)

I change it to saveObject  but nada I still got the same error: 'undefined' is not an object (evaluating 'saveObject.results.push') in this line: saveObject.results.push(value);. As far as writing to file concerning I tried to write directly something to file. The file is created but I got the following error:  (33) :TypeError: 'undefined' is not a function (evaluating 'stream.writeFile('hello')') where 33 line is the following: stream.writeFile('hello');

Hello,

There some error: use saveObject.results... instead saveObjects.results...