Photoshop script that generates Icons for Android and iOS devices.

IconGeneration.jsx

/**
 * Small script to generate icons for Android and iOS -devices.
 *
 * Copyrights:
 * Copyright (c) 2010 Matt Di Pasquale  (https://gist.github.com/mattdipasquale/711203)
 * Added tweaks Copyright (c) 2012 by Josh Jones http://www.appsbynight.com  (https://gist.github.com/appsbynight/3681050)
 * Code cleanup, rewrite, minor buggfixing, addition of android icons and generation of the folders by Johannes Tegnér http://jite.eu
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

var iconList = [
  {"folder": "iOS", "name": "", "size":29},
  {"folder": "android", "name": "", "size":29},
  {"folder": "iOS", "name": "icon-Small", "size":29},
  {"folder": "iOS", "name": "icon-Small@2x", "size":58},
  {"folder": "iOS", "name": "icon-Small@3x", "size":87},
  {"folder": "iOS", "name": "icon-Small-40", "size":40},
  {"folder": "iOS", "name": "icon-Small-40@2x", "size":80},
  {"folder": "iOS", "name": "Icon-60@2x", "size":120},
  {"folder": "iOS", "name": "Icon-76", "size":76},
  {"folder": "iOS", "name": "Icon-76@2x", "size":152},
  {"folder": "iOS", "name": "Icon-76@3x", "size":180},
  {"folder": "iOS", "name": "Icon-72", "size":72},
  {"folder": "iOS", "name": "Icon-72@2x", "size":144},
  {"folder": "iOS", "name": "Icon", "size":57},
  {"folder": "iOS", "name": "Icon-50", "size":50},
  {"folder": "iOS", "name": "Icon-50@2x", "size":100},
  {"folder": "iOS", "name": "iTunesArtwork", "size": 512},
  {"folder": "iOS", "name": "iTunesArtwork@2x", "size": 1024},
  {"folder": "android/drawable-mdpi", "name": "icon", "size": 48},
  {"folder": "android/drawable-hdpi", "name": "icon", "size": 72},
  {"folder": "android/drawable-xhdpi", "name": "icon", "size": 96},
  {"folder": "android/drawable-xxhdpi", "name": "icon", "size": 144}
];
try {
  var baseFile = File.openDialog("Please select a 1024x1024 (or larger) png file.", "*.png");
  if(baseFile) {
    var image = open(baseFile, OpenDocumentType.PNG);
    if(!image) {
      throw "Failed to open image.";
    }
    var state = image.activeHistoryState;
    preferences.rulerUnits = Units.PIXELS;
    if(image.width != image.height || image.width < 1024 || image.height < 1024) {
      throw "Wrong dimentions. Image should be at least 1024x1024 and width and height has to be the same..";
    }
    var destFolder = Folder.selectDialog("Select output folder.");
    if(!destFolder) {
      throw "No folder selected.";
    }
    for(var i=0;i<iconList.length;i++) {
      if(iconList[i].folder != "") {
        var tempFolder = new Folder(destFolder + "/" + iconList[i].folder);
        if(!tempFolder.exists) {
          tempFolder.create();
        }
      }
    }
    var saveForWeb = new ExportOptionsSaveForWeb();
    saveForWeb.format = SaveDocumentType.PNG;
    saveForWeb.PNG8 = false;
    saveForWeb.transparency = true;
    var icon;
    for(var i=0;i<iconList.length;i++) {
      if(iconList[i].name === "") {
        continue;
      }
      icon = iconList[i];
      image.resizeImage(icon.size, icon.size, null, ResampleMethod.BICUBICSHARPER);
      var destinationFile = icon.name + ".png";
      if (icon.name == "iTunesArtwork@2x" || icon.name == "iTunesArtwork") {
        destinationFile = icon.name;
      }
      image.exportDocument(new File(destFolder + "/" + icon.folder + "/" + destinationFile), ExportType.SAVEFORWEB, saveForWeb);
      image.activeHistoryState = state;
    }
    image.close(SaveOptions.DONOTSAVECHANGES);

    alert("Done!");
  } else {
    throw "Sorry, for some reason the file could not be opened.";
  }
} catch(ex) {
  alert(ex);
}