Check if directory exist on android's sdcard

Regular Java file IO:

File f = new File(Environment.getExternalStorageDirectory() + "/somedir");
if(f.isDirectory()) {
   ....

Might also want to check f.exists(), because if it exists, and isDirectory() returns false, you'll have a problem. There's also isReadable()...

Check here for more methods you might find useful.

File dir = new File(Environment.getExternalStorageDirectory() + "/mydirectory");
if(dir.exists() && dir.isDirectory()) {
    // do something here
}

The following code also works for java files:

// Create file upload directory if it doesn't exist    
if (!sdcarddir.exists())
   sdcarddir.mkdir();

General use this function for checking is a Dir exists:

public boolean dir_exists(String dir_path)
  {
    boolean ret = false;
    File dir = new File(dir_path);
    if(dir.exists() && dir.isDirectory())
      ret = true;
    return ret;
  }

Use the Function like:

String dir_path = Environment.getExternalStorageDirectory() + "//mydirectory//";

if (!dir_exists(dir_path)){
  File directory = new File(dir_path); 
  directory.mkdirs(); 
}

if (dir_exists(dir_path)){
  // 'Dir exists'
}else{
// Display Errormessage 'Dir could not creat!!'
}

I've made my mistake about checking file/ directory. Indeed, you just need to call isFile() or isDirectory(). Here is the docs

You don't need to call exists() if you ever call isFile() or isDirectory().