科尔多瓦创建嵌套目录

Question

我编写了以下代码，以使用cordova在Android的cordova.file.externalRootDirectory目录下创建嵌套目录（'ROOTapplication / pdf'）。该代码在首次执行时仅创建“ ROOTapplication”。在第二次执行时，还会在ROOTapplication下创建pdf。我将一步创建（'ROOTapplication / pdf'）。遵循代码。

<script type="text/javascript" charset="utf-8">
document.addEventListener("deviceready", init, false);
var listaCartelle = new Array();
var rootApplication, esito;

    function init() 
{
  esito = autorizzApp();

  if(esito == "SUCCESS")
  {
    rootApplication = cordova.file.externalRootDirectory + 'ROOTapplication';
    listaCartelle.push(cordova.file.externalRootDirectory, 'ROOTapplication');

    listaCartelle.push(rootApplication, 'pdf');
    localStorage.pdf = localStorage.rootApplication + '/pdf';

    creaAlberaturaApp(creaCartellaSingola);
  }
    }

function creaAlberaturaApp(creaCartellaSingola)
{
  var i=0;
  while(i <= listaCartelle.length-2)
  {
    if (creaCartellaSingola && typeof creaCartellaSingola === 'function') {
      esito = creaCartellaSingola(listaCartelle[i], listaCartelle[i+1]);
      if(esito == "SUCCESS")
        i+=2;
      else
        break;
    }
  }
}

// CREATE EXTERNAL DIR
function creaCartellaSingola(father_dir, children_dir)
{
  //  CREATE DIRECTORY "children_dir" UNDER "father_dir"
  window.resolveLocalFileSystemURL(father_dir,
    function fileEntryCallback(fileEntry) {
      fileEntry.getDirectory(children_dir , { create: true, exclusive: false });
    }
  );
  return "SUCCESS";
}

// AUTHORIZATION FOR WRITING ON SD
function autorizzApp()
{
  cordova.plugins.diagnostic.requestExternalStorageAuthorization(function(status){
    switch(status){
      case cordova.plugins.diagnostic.permissionStatus.NOT_REQUESTED:
        alert("Permission not requested");
      break;
      case cordova.plugins.diagnostic.permissionStatus.DENIED:
        alert("Permission denied");
      break;
      case cordova.plugins.diagnostic.permissionStatus.GRANTED:
        debug("Permission granted");
      break;
    }
  });
  return "SUCCESS";
}
</script>