Make directory in android

Question

Im trying to build a directory called \"images\" on the SD card on android. This is my code but its not working? Can anyone give me some advice?

File picDire         


        

Answer 1

To create file inside sd card you have to use Environment.getExternalStorageDirectory()

   /**
     * Creates a new directory inside external storage if not already exist.
     *
     * @param name The directory name
     */
    public static void createNewDirectory(String name) {
            // create a directory before creating a new file inside it.
            File directory = new File(Environment.getExternalStorageDirectory(), name);
            if (!directory.exists()) {
                directory.mkdirs(); 
            }
        }

Following two important parameter which helps you to create directory 1. directory.mkdirs() :

Creates the directory named by this file, creating missing parent directories if necessary. 2. directory.mkdir() :

Creates the directory named by this file, assuming its parents exist.

For more you can how getExternalStorageDirectory() works please see link

Answer 2

One thing that is worth noting is if you always get false from the mkdirs(), try to unplug your device from pc, and see if it could create folders. At least I tried, it worked for me, currently I'm looking for ways to fix this problem.

Answer 3

you can use this :

File directory = new File(Environment.getExternalStorageDirectory() + "/images");
directory.mkdirs();

Answer 4

To create specific root directory and its sub folder i use this code

String root = Environment.getExternalStorageDirectory().toString();//get external storage

File myDir = new File(root + "/grocery"+"/photo/technostark");//create directory and subfolder

File dir=new File(root + "/grocery"+"/data");//create subfolder

myDir.mkdirs();

dir.mkdirs();

Answer 5

Environment.getExternalStorageDirectory() is deprecated. So you should use you this:

File directory = new File(this.getExternalFilesDir(null).getAbsolutePath() + "/YourDirectoryName");
directory.mkdirs();

Answer 6

I use this to know the result:

File yourAppDir = new File(Environment.getExternalStorageDirectory()+File.separator+"yourAppDir");

    if(!yourAppDir.exists() && !yourAppDir.isDirectory()) 
    {
        // create empty directory
        if (yourAppDir.mkdirs())
        {
            Log.i("CreateDir","App dir created");
        }
        else
        {
            Log.w("CreateDir","Unable to create app dir!");
        }
    }
    else
    {
        Log.i("CreateDir","App dir already exists");
    }