Error: Open Failed: Enoent (No Such File or Directory)

Error: open failed: ENOENT (No such file or directory)

The Pictures directory might not exist yet. It's not guaranteed to be there.

In the API documentation for getExternalStoragePublicDirectory(), the code ensures the directory exists using mkdirs:

File path = Environment.getExternalStoragePublicDirectory(
        Environment.DIRECTORY_PICTURES);
File file = new File(path, "DemoPicture.jpg");

try {
    // Make sure the Pictures directory exists.
    path.mkdirs(); 

...so it may be as simple as adding that path.mkdirs() to your existing code before you createTempFile.

java.io.FileNotFoundException open failed: ENOENT (No such file or directory)

You need to open the file using new File(uri.getPath()).
uri.toString() returns the URI as a string, that means "file://path/to/file" which is not a valid path.

Save file in Android: java.io.FileNotFoundException. open failed: ENOENT (No such file or directory)

use this code

File folder = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/EmailClient/");

folder.mkdirs();
File file = new File(folder,filename);
file.createNewFile();

Android :Error while creating file : ENOENT (No such file or directory)

Handle run time permissions if you user Android M or next version

File folder = new File(Environment.getExternalStorageDirectory() +
                File.separator + "wifip2pshared/" + dirName);
        boolean success = true;
        if (!folder.exists()) {
            success = folder.mkdirs();
        }
        if (success) {
            // Do something on success
        } else {
            // Do something else on failure
        }

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OR

  File dir = new File("storage/emulated/0/wifip2pshared/" + dirName); 
try { 
      if (!dir.exists()) { 
          if (dir.mkdir()) { 
              System.out.println("Directory created"); 
           } else { 
              System.out.println("Directory is not created"); 
           } 
     } 
 } catch (Exception e) { 
        e.printStackTrace(); 
 }

createNewFile - open failed: ENOENT (No such file or directory)

You are not using Environment.DIRECTORY_PICTURES correctly. It is not a folder by itself, you need to use it as a parameter to getExternalStoragePublicDirectory() method.
Check here : http://developer.android.com/reference/android/os/Environment.html#getExternalStoragePublicDirectory(java.lang.String)

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