How to create a directory in Android?

Question

Everything is in the question. Here is my code :

    private void createDirectory(File currentDirectory) {
  File f = null;
  try {

   f = new File(current         


        

Answer 1

You have to add this permission:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

By the way, not sure how you are getting the SDcard directory... but it must be this way:

File sdDir = Environment.getExternalStorageDirectory();

It's important, because some programmers use to think that the SDCard is always /sdcard, but it could change.

Answer 2

instead of boolean success = f.mkdir(); use

boolean success = f.mkdirs();

that solved my problem (i used the same reference code as you and had the same issue).

Answer 3

You're going to need to add

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

to your manifest file to tell Android to ask the user for your application to be allowed to.

Answer 4

First, please use the File constructor that takes a File for your directory and a String for your desired subdirectory.

Beyond that, most likely you are attempting to create a directory where you are not allowed, either because:

• currentDirectory does not exist, or
• currentDirectory points to a place on the on-board flash storage where you are not allowed to write, or
• currentDirectory points to a place on the external storage and you lack the WRITE_EXTERNAL_STORAGE permission