README.md

Usage

Install cordova into node_modules

npm install cordova

Add icons_and_splash.js

Copy icons_and_splash.js into the .cordova/hooks/after_prepare directory.

It also needs to be executable: chmod +x .cordova/hooks/after_prepare/icons_and_splash.js

Add this to your config.xml

<icon src="res/icons/" />

Add these files to your www directory

www/res
`-- icons
    |-- android
    |   |-- icon-36-ldpi.png
    |   |-- icon-48-mdpi.png
    |   |-- icon-72-hdpi.png
    |   `-- icon-96-xhdpi.png
    `-- ios
        |-- icon-29-2x.png
        |-- icon-29.png
        |-- icon-40-2x.png
        |-- icon-40.png
        |-- icon-50-2x.png
        |-- icon-50.png
        |-- icon-57-2x.png
        |-- icon-57.png
        |-- icon-60-2x.png
        |-- icon-60.png
        |-- icon-72-2x.png
        |-- icon-72.png
        |-- icon-76-2x.png
        `-- icon-76.png

Report any error

If you get any error, please report error in comments here. I will then try to fix and update this gist accordingly. Please help us take away the pain in adding a custom icon to our applications.

convert.bat

#
# (Windows)
#
# What is this?
#
# It's a shell script that is using ImageMagick to create all the icon files from one source icon.
#
# If you'd like to use it on windows install ImageMagick:
# http://www.imagemagick.org/script/binary-releases.php#windows
#
# Stick the script in your 'www/res/icons' folder with your source icon 'my-hires-icon.png' then trigger it from Command Prompt.
#

mkdir android
convert my-hires-icon.png -resize 36x36 android/icon-36-ldpi.png
convert my-hires-icon.png -resize 48x48 android/icon-48-mdpi.png
convert my-hires-icon.png -resize 72x72 android/icon-72-hdpi.png
convert my-hires-icon.png -resize 96x96 android/icon-96-xhdpi.png

mkdir ios
convert my-hires-icon.png -resize 29 ios/icon-29.png
convert my-hires-icon.png -resize 40 ios/icon-40.png 
convert my-hires-icon.png -resize 50 ios/icon-50.png 
convert my-hires-icon.png -resize 57 ios/icon-57.png
convert my-hires-icon.png -resize 58 ios/icon-29-2x.png
convert my-hires-icon.png -resize 60 ios/icon-60.png
convert my-hires-icon.png -resize 72 ios/icon-72.png
convert my-hires-icon.png -resize 76 ios/icon-76.png  
convert my-hires-icon.png -resize 80 ios/icon-40-2x.png
convert my-hires-icon.png -resize 100 ios/icon-50-2x.png
convert my-hires-icon.png -resize 114 ios/icon-57-2x.png     
convert my-hires-icon.png -resize 120 ios/icon-60-2x.png
convert my-hires-icon.png -resize 144 ios/icon-72-2x.png
convert my-hires-icon.png -resize 152 ios/icon-76-2x.png

convert.sh

#
# (OS X, Unix and Linux)
#
# What is this?
#
# It's a shell script that is using ImageMagick to create all the icon files from one source icon.
#
# Stick the script in your 'www/res/icons' folder with your source icon 'my-hires-icon.png' then trigger it from Terminal.
#

ICON=${1:-"my-hires-icon.png"}

mkdir android
convert $ICON -resize 36x36 android/icon-36-ldpi.png
convert $ICON -resize 48x48 android/icon-48-mdpi.png
convert $ICON -resize 72x72 android/icon-72-hdpi.png
convert $ICON -resize 96x96 android/icon-96-xhdpi.png

mkdir ios
convert $ICON -resize 29 ios/icon-29.png
convert $ICON -resize 40 ios/icon-40.png 
convert $ICON -resize 50 ios/icon-50.png 
convert $ICON -resize 57 ios/icon-57.png
convert $ICON -resize 58 ios/icon-29-2x.png
convert $ICON -resize 60 ios/icon-60.png
convert $ICON -resize 72 ios/icon-72.png
convert $ICON -resize 76 ios/icon-76.png  
convert $ICON -resize 80 ios/icon-40-2x.png
convert $ICON -resize 100 ios/icon-50-2x.png
convert $ICON -resize 114 ios/icon-57-2x.png     
convert $ICON -resize 120 ios/icon-60-2x.png
convert $ICON -resize 144 ios/icon-72-2x.png
convert $ICON -resize 152 ios/icon-76-2x.png

icons_and_splash.js

#!/usr/bin/env node

(function() {
  'use strict';

  var cordova_util = require('cordova-lib/src/cordova/util');
  var projectRoot = cordova_util.isCordova(process.cwd());
  var projectXml = cordova_util.projectConfig(projectRoot);
  var projectPlatforms = cordova_util.listPlatforms(projectRoot);
  var CordovaConfigParser,
       projectConfig;

  if ( typeof cordova_util.config_parser === 'undefined' ) {
      CordovaConfigParser = require('cordova-lib').configparser;
      projectConfig = new CordovaConfigParser(projectXml);
  } else {
      projectConfig = new cordova_util.config_parser(projectXml);
  }

  var fs = require ('fs');
  var path = require('path');

  var platformDir = {
    ios: {
      icon: '{$projectName}/Resources/icons',
      splash: '{$projectName}/Resources/splash',
      platformsDir: 'ios',
      nameMap: {

        // iOS >= 7 Settings icon
        // iOS <= 6.1 Small icon for Spotlight search results and Settings (recommended) iPhone
        'icon-29.png': 'icon-small.png',
        'icon-29-2x.png': 'icon-small@2x.png',

        // iOS >= 7 Spotlight search results icon (recommended)
        'icon-40.png': 'icon-40.png',
        'icon-40-2x.png': 'icon-40@2x.png',

        // iOS <= 6.1 Small icon for Spotlight search results and Settings (recommended) iPad
        'icon-50.png': 'icon-50.png',
        'icon-50-2x.png': 'icon-50@2x.png',

        // iOS <= 6.1 App icon (required) iPhone
        'icon-57.png': 'icon.png',
        'icon-57-2x.png': 'icon@2x.png',

        // iOS >= 7 App icon (required) iPhone
        'icon-60.png': 'icon-60.png',
        'icon-60-2x.png': 'icon-60@2x.png',

        // iOS <= 6.1 App icon (required) iPad
        'icon-72.png': 'icon-72.png',
        'icon-72-2x.png': 'icon-72@2x.png',

        // iOS 7 App icon (required) iPad
        'icon-76.png': 'icon-76.png',
        'icon-76-2x.png': 'icon-76@2x.png',

        // 'screen-iphone-landscape.png': 'Default~iphone.png',
        'screen-ipad-portrait.png': 'Default-Portrait~ipad.png',
        'screen-ipad-portrait-2x.png': 'Default-Portrait@2x~ipad.png',

        'screen-ipad-landscape-2x.png': 'Default-Landscape@2x~ipad.png',
        'screen-ipad-landscape.png': 'Default-Landscape~ipad.png',

        'screen-iphone-portrait.png': 'Default~iphone.png',
        'screen-iphone-portrait-2x.png': 'Default@2x~iphone.png',
        'screen-iphone-portrait-568h-2x.png': 'Default-568h@2x~iphone.png'
      }
    },
    android: {
      icon:'res/drawable-{$density}',
      splash:'res/drawable-{$density}',
      platformsDir: 'android',
      nameMap: {
        'icon-36-ldpi.png': 'icon.png',
        'icon-48-mdpi.png': 'icon.png',
        'icon-72-hdpi.png': 'icon.png',
        'icon-96-xhdpi.png': 'icon.png',
        'screen-ldpi-portrait.png': 'ic_launcher.png',
        'screen-mdpi-portrait.png': 'ic_launcher.png',
        'screen-hdpi-portrait.png': 'ic_launcher.png',
        'screen-xhdpi-portrait.png': 'ic_launcher.png'
      }
    },
    blackberry10: {},
    winphone: {
      icon:'.',
      splash:'.',
      platformsDir: 'wp8',
      nameMap: {
        'icon-62.png': 'ApplicationIcon.png',
        'tile-173.png': 'Background.png',
        'SplashScreenImage.png': 'SplashScreenImage.jpg',
        'screen-portrait-800h.jpg': 'SplashScreenImage.jpg'
      }
    }
  };

  function copyAsset (scope, node) {

    var platform = node.attrib['gap:platform'];
    var density  = node.attrib['gap:density'];
    var assetDirTmpl = platformDir[platform] && platformDir[platform][scope];

    if (!assetDirTmpl) {
      throw new Error('Platform and density not supported: ' + platform + ', ' + density);
    }

    var dict = {
      projectName: projectConfig.name(),
      density: density
    };

    var assetDir = assetDirTmpl.replace(/{\$([^}]+)}/, function (match, p1) {
      return dict[p1];
    });

    var srcPath = path.join(projectRoot, 'www', node.attrib.src);
    var fileName = srcPath.match(/[^\/]+$/)[0];
    if (platformDir[platform] && platformDir[platform].nameMap && platformDir[platform].nameMap[fileName]) {
      fileName = platformDir[platform].nameMap[fileName];
    } else {
      throw new Error('Unknown icon name for platform ' + platform);
    }
    var dstPath = path.join(projectRoot, 'platforms', platform, assetDir, fileName);
   
    if (!fs.existsSync (dstPath)) {
      console.warn ('template file ' + dstPath + ' does not exist and will not be replaced' );
      return;
    }

    console.log ('copying from '+srcPath+' to the '+dstPath);
    // so, here we start to copy asset
    fs.stat (srcPath, function (err, stats) {
      if (err) {
        throw err;
      }
      var r = fs.createReadStream(srcPath);
      r.on ('open', function () {
        r.pause();
        var w = fs.createWriteStream(dstPath);
        w.on ('open', function () {
          r.pipe(w);
          r.resume();
        });
        w.on ('error', function() {
          throw new Error('Cannot write file');
        });
      });
      r.on ('error', function() {
        throw new Error('Cannot read file');
      });
    });
  }

  var allicons = projectConfig.doc.findall('icon');
  if (allicons.length === 0 ) {
    console.warn( 'No icons to install, missing icon specs in config.xml' );
  } else {
    console.log( 'Update all icons for project: ' + projectConfig.name() );
  }

  allicons.map(function (node) {
    if (/\/$/.test(node.attrib.src) && node.attrib['gap:platform'] === undefined && node.attrib['gap:density'] === undefined) {

      if (~projectPlatforms.indexOf('android')) {
        // Android
        copyAsset('icon', { attrib: { 'gap:platform': 'android', src: node.attrib.src + 'android/icon-36-ldpi.png', 'gap:density': 'ldpi' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'android', src: node.attrib.src + 'android/icon-48-mdpi.png', 'gap:density': 'mdpi' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'android', src: node.attrib.src + 'android/icon-72-hdpi.png', 'gap:density': 'hdpi' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'android', src: node.attrib.src + 'android/icon-96-xhdpi.png', 'gap:density': 'xhdpi' } });
      }

      if (~projectPlatforms.indexOf('ios')) {
        // iOS >= 7 Settings icon
        // iOS <= 6.1 Small icon for Spotlight search results and Settings (recommended) iPhone
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-29.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-29-2x.png' } });

        // iOS >= 7 Spotlight search results icon (recommended)
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-40.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-40-2x.png' } });

        // iOS <= 6.1 Small icon for Spotlight search results and Settings (recommended) iPad
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-50.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-50-2x.png' } });

        // iOS <= 6.1 App icon (required) iPhone
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-57.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-57-2x.png' } });

        // iOS >= 7 App icon (required) iPhone
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-60.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-60-2x.png' } });

        // iOS <= 6.1 App icon (required) iPad
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-72.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-72-2x.png' } });

        // iOS 7 App icon (required) iPad
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-76.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'ios', src: node.attrib.src + 'ios/icon-76-2x.png' } });
      }

      if (~projectPlatforms.indexOf('wp8')) {
        copyAsset('icon', { attrib: { 'gap:platform': 'winphone', src: node.attrib.src + 'wp/icon-62.png' } });
        copyAsset('icon', { attrib: { 'gap:platform': 'winphone', src: node.attrib.src + 'wp/tile-173.png' } });
      }

    } else {
      copyAsset ('icon', node);
    }
  });

  projectConfig.doc.findall('*').filter(function (node) {
    return (node.tag === 'gap:splash');
  }).map(function (node) {
    copyAsset ('splash', node);
  });

})();

For cordoba-lib version ~> 0.21.4, you should change this line:

CordovaConfigParser = require('cordova-lib/src/cordova/configparser');

for this one:

CordovaConfigParser = require('cordova-lib').configparser;

worked for me on windows 8 (cordova@3.5.0-0.2.7) after changing line 120 (2 backslashs)

var fileName = srcPath.match(/[^\\/]+$/)[0];

for global cordova installation cordova-lib directory can be located like

var nodeHomeDir = /[^\s]*/.exec(process.env.CORDOVA_CMDLINE)[0].match(/^.*[\\/]/)[0];
var cordova_util = require(nodeHomeDir + '/node_modules/cordova-lib/src/cordova/util');

@MGalv - thanks! I upgraded cordova-lib locally and confirmed that this works. Thanks for the comment and the fix for the newest versions!