An adobe illustrator script to export layers into android resources

illustrator_android_res_export.jsx

/**
* Adobe Illustrator Script that exports each layer into PNG files according to its layer name,
* as well as making copies for various screen sizes.
* 
* (1)The illustrator document should has dimensions in xxhdpi. 
*     One xxhdpi screen is nexus5 (480dpi) with dimensions 1920x1080px
*     Launcher icon at baseline 48x48dp is 48x48px for mdpi 
*     so the lanucher_icon layer should be at 144x144px inside the illustrator document to be exported.
* 
* (2)Modify the destination android project in line33
* 
* (3)you can exclude a layer from being exported by prefixing the name with "-"
* 
* (4)Run this from illustrator -> File-> Scripts-> Other scripts (Ctrl +F12)
*/


var doc = app.activeDocument;

// prepare layers
for(var i=0; i<doc.layers.length; i++) {
		doc.layers[i].visible = false;
}


// go through each layers
for(var i=0; i<doc.layers.length; i++) {
    if(doc.layers[i].name[0] != '-'){  //check for exclusion
    	doc.layers[i].visible = true;
    	if (i>0) doc.layers[i-1].visible = false;

    	var fpath = doc.path; // save to document's folder
        var basepath = "C:/Users/kaka/Documents/GitHub/cocross_android/res/";
        fpath = File(basepath + 'drawable-mdpi/'+doc.layers[i].name+'.png');
        savePNG( fpath , 33.33);
        
        fpath.changePath( basepath + 'drawable-hdpi/'+doc.layers[i].name+'.png');
        savePNG( fpath , 50);
        
        fpath.changePath(basepath +'drawable-xhdpi/'+doc.layers[i].name+'.png');
        savePNG( fpath , 66.67);
        
        fpath.changePath( basepath + 'drawable-xxhdpi/'+doc.layers[i].name+'.png');
        savePNG( fpath , 100);
        doc.layers[i].visible = false;
    }
}

// return visibility
for(var i=0; i<doc.layers.length; i++) {
        doc.layers[i].visible = true;
}


/**
	* Save PNG file
	* @param file File object
*/
function savePNG( file, scale ) {
	// export SAVE-FOR-WEB options
	var exp = new ExportOptionsPNG24();
	exp.transparency = true;
    exp.verticalScale = scale;
    exp.horizontalScale = scale;
    
	// export as SAVE-FOR-WEB
	doc.exportFile( file, ExportType.PNG24, exp);

}