flex,air:在指定文件夹中搜索.pdf文件

那里:

var docs:File = File.documentsDirectory;
var dirs:Array = docs.getDirectoryListing();
var pdfFiles:String = "";
for(var i:int; i < dirs.length; i++)
{
    var f:File = dirs[i] as File;
    if(f.isDirectory || f.name.toLowerCase().lastIndexOf(".pdf") != f.name.length - 4)
        continue;

    pdfFiles += f.name + "\n";
}
txt.text = pdfFiles;