Error While Creating New File In Sd Card Using Documentfile.createfile();

I am trying to create a new File in SD Card for Android 5.0 and above. So first I am making the user grant the permission through SAF. This is how I am check if the selected Direct

Solution 1:

Continue from this answer now that you have the DocumentFile (which is a directory to create a file inside it) through the loop just use myDocumentFile.createFile(...) to create a new file on your desired directory.

// creating the fileDocumentFiledocumentFileNewFile= documentFileGoal.createFile(myMimeType,
myNewFileName);

Then stream to it

outputStream = getContentResolver().openOutputStream(documentFileNewFile.getUri());
inputStream = new FileInputStream(myInputFile);

...
   if (outputStream != null) {
       byte[] buffer = new byte[1024];
       int read;
       while ((read = inputStream.read(buffer)) != -1) {
           outputStream.write(buffer, 0, read);
       }
      }
...
...
...
} finally {
         if (inputStream != null)
             inputStream.close();
         if (outputStream != null) {
             outputStream.flush();
             outputStream.close();
           }
         }  

Edite Prevent findFile on a null DocumentFile by checking the value of rootDocFile on each loop. (happens when the user selects a wrong path instead of the sd-card)

for (int i = 3; i < parts.length; i++)
{
    if (rootDocFile != null) {
        rootDocFile = rootDocFile.findFile(parts[i]);
    }
}