home.ts

  listRootDir = () => {

    const ROOT_DIRECTORY = "file:///";

    (<any> window).resolveLocalFileSystemURL(ROOT_DIRECTORY,
      (fileSystem) => {

        var reader = fileSystem.createReader();
        reader.readEntries(
          (entries) => {
            this.ngZone.run(()=> {
              this.items = entries;
            });
          }, this.handleError);
      }, this.handleError);
  }