android – 无法在模拟器上的/ storage / emulated / 0上创建目录

我正在尝试在我的 android模拟器上创建一个目录,但是我不能这样做,我已经拥有了manifest write_storage的权限,并且我没有得到任何错误,但mkdir()返回false,我验证外部存储是否也可写它是,它在物理设备上工作我的代码：

/// Cria uma nova pasta para colocar o BACkup
    File direct = new File(Environment.getExternalStorageDirectory(),"/Financas RW BACkup");
    try {


        if (!direct.exists()) {
            if(isExternalStorageWritable()&&isExternalStorageReadable()) {
              if(  direct.mkdir()) {
                  fachada.showmessage(ExportImportDB.this," Criado");
              }else{
                  fachada.showmessage(ExportImportDB.this," Não Criado");
              }
            }
        }
    } catch (Exception E) {
        fachada.showmessage(this,e.toString());
    }