Phonegap Application text and layout too small

Question

I recently build an android app using html, css, javascript and running them through phonegap to create the actual app. One of the problems I encountered in one phone is that the text looks too small. Also some images are a little small as well. I added a viewport meta tag but it doesnt seem to work either. Here are the meta tags:

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="format-detection" content="telephone=no" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, user-scalable=no, target-densitydpi=device-dpi" />`

This is how it looks

This is how its supposed to look:

Solution 1

I had the same problem and solved it changing the viewport. I also thought the problem was phonegap, but it really was that the devices used for testing had different dpi.

My solution was to change the target-densitydpi on the viewport to:

<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, target-densitydpi=medium-dpi, user-scalable=0" />

Hope it helps

Solution 2

I had a similar problem and did some research I thought is worth sharing:

• Set the viewport's target-densitydpi to medium-dpi (=160dpi), as already suggested. This virtualizes the px unit, e.g. 1px in html/css then corresponds to 2 physical pixels on a 320dpi device. Note that images are scaled (and blurred) as well.

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

• CSS: Use media queries to implement conditional styling. Adapting for different screen sizes dependent on width, height, aspect or orientation is straight-forward. Different pixel densities can be handled with device-pixel-ratio (thanks to Marc Edwards for providing an example: https://gist.github.com/marcedwards/3446599).

  @media screen and (-webkit-min-device-pixel-ratio: 1.5),
         screen and (-o-min-device-pixel-ratio: 15/10)
  {
    body { background-image: ... } /* provide high-res image */
  }
  

  The media feature resolution is cleaner than device-pixel-ratio, but it lacks mobile browser support.

• Javascript: Adapt button sizes, images etc. based on window.devicePixelRatio and window.screen.width and window.screen.height. Layouting per Javascript is considered as bad practice. Also flickering might result during loading as the execution starts after the pageload event.

• -webkit-image-set and image src-set make it easy to provide high-res images for retina displays, see http://www.html5rocks.com/en/mobile/high-dpi/#toc-bff. Browser support is limited.

   background-image: -webkit-image-set(
     url(icon1x.jpg) 1x,
     url(icon2x.jpg) 2x
   );
  

Solution 3

It appears that removing the target-densitydpi altogether brings the best results.

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

This should be more than enough to control your app's appearance in most cases.

Solution 4

target-densitydpi=medium-dpi Worked for us.

Scenario Faced this issue when ee upgraded from PhoneGap 2.2 to 3.3.

Solution 5

Updated answer: for Android

The problem is on Android devices has this Accessibilly settings, You can try to change font-size (search font size on android setting) and run you app again.

So your fonts on app will be changed as your setting

---

So here is a solution for Cordova

Use : mobile-accessibility to disabling PreferredTextZoom

Install mobile-accessibility on your Cordova project

$ cordova plugin add https://github.com/phonegap/phonegap-mobile-accessibility.git

And JS part is something like :

document.addEventListener("deviceready", onDeviceReady, false);
function onDeviceReady() {
   if (window.MobileAccessibility) {
      window.MobileAccessibility.usePreferredTextZoom(false);
   }
}

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