Screen Resolution On A PhoneGap App

Miko Diko picture Miko Diko · Dec 11, 2013 · Viewed 24.8k times · Source

I'm writing a Phonegap (3.2) app, I take a HTML5 canvas, make it full screen and the whole app UI is on this canvas.

Using a Samsung Galaxy S4 (Android 4.3) to test the app, the screen resolution of the app is only 360X640 and not 1080X1920 like I want it to be.

What is needed to be done in-order to make the app use the maximum possible screen resolution ?

I've added screen shots 1) // Looks OK but bad resolution

windowWidth = window.innerWidth; windowHeight = window.innerHeight; enter image description here

2) // Takes small part of the screen, rest is white

windowWidth = window.outerWidth; windowHeight = window.outerHeight; enter image description here

3) // Only a small part of the picture is visible, as if the image is at 1080X1920 but the screen is 'too small' for it.

windowWidth = screen.width; windowHeight = screen.height; enter image description here

and here is the full code:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8" />
    <title>PhoneGapTesting</title>
    <script type="text/javascript" src="js/jquery.min.js"></script>
    <script type="text/javascript" charset="utf-8" src="cordova.js"></script>
    <!-- -->
    <script type="text/javascript">

    var windowWidth;
    var windowHeight;

    var canvasMain;
    var contextMain;

    var backgroundImage;

    $(document).ready(function() {
        windowWidth = window.innerWidth;
        windowHeight = window.innerHeight;
        //windowWidth = window.outerWidth; // Only 'window.innerWidth' + 'window.innerHeight' look OK but not max resolution
        //windowHeight = window.outerHeight;
        //windowWidth = screen.width;
        //windowHeight = screen.height;

        canvasMain = document.getElementById("canvasSignatureMain");
        canvasMain.width = windowWidth;
        canvasMain.height = windowHeight;
        contextMain = canvasMain.getContext("2d");

        backgroundImage = new Image();
        backgroundImage.src = 'img/landscape_7.jpg';
        backgroundImage.onload = function() {
            contextMain.drawImage(backgroundImage, 0, 0, backgroundImage.width, backgroundImage.height, 0, 0, canvasMain.width, canvasMain.height);
        };

        $("#canvasSignatureMain").fadeIn(0);
    })

    </script>
</head>
<body scroll="no" style="overflow: hidden">
    <center>
        <div id="deleteThisDivButNotItsContent">
            <canvas id="canvasSignatureMain" style="border:1px solid #000000; position:absolute; top:0;left:0;"></canvas><br>
        </div>
    </center>
</body>
</html>

Thanks.

Answer

Miko Diko picture Miko Diko · Dec 11, 2013

A solution that is working with both resolution and touch event issue (that came with Ken's post):

<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width, height=device-height, target-densitydpi=device-dpi" />

In the < head >

Thanks Ken for trying to help bro :))