Create a public folder in internal storage

Question

Sorry for my English, but I want to write in this file because in my opinion is the best. Now my problem: I want to create a folder in Internal storage to share with 2 application. In my app, I downloaded an Apk from my server and I run it. Before I used external storage and everything worked. Now I want to use the internal storage for users that don't have an external storage.

I use this:

String folderPath = getFilesDir() + "Dir"

but when i try to run the Apk, it doesn't work, and I can't find this folder on my phone.

Thank you..

You'll need to actually create the directory, and files within it, and set the permission mode appropriately. You might look at the documentation for the File class. — Chris Stratton, Jun 24 '13 at 16:13
possible duplicate of [How to create folder into SD Card in Android](http://stackoverflow.com/questions/6911041/how-to-create-folder-into-sd-card-in-android) — Brian Roach, Jun 24 '13 at 16:23
2 Brian Roach, that question is about external storage, not internal. — Yakiv Mospan, Jun 24 '13 at 16:27

score 4 · Accepted Answer · edited Jun 20 '20 at 09:12

From this post :

Correct way:

Create a File for your desired directory (e.g., File path=new

File(getFilesDir(),"myfolder");)

Call mkdirs() on that File to create the directory if it does not exist

Create a File for the output file (e.g., File mypath=new File(path,"myfile.txt");)

Use standard Java I/O to write to that File (e.g., using new BufferedWriter(new FileWriter(mypath)))

Enjoy.

Also to create public file I use :

    /**
 * Context.MODE_PRIVATE will create the file (or replace a file of the same name) and make it private to your application.
 * Other modes available are: MODE_APPEND, MODE_WORLD_READABLE, and MODE_WORLD_WRITEABLE.
 */

public static void createInternalFile(Context theContext, String theFileName, byte[] theData, int theMode)
{
    FileOutputStream fos = null;

    try {
        fos = theContext.openFileOutput(theFileName, theMode);
        fos.write(theData);
        fos.close();
    } catch (FileNotFoundException e) {
        Log.e(TAG, "[createInternalFile]" + e.getMessage());
    } catch (IOException e) {
        Log.e(TAG, "[createInternalFile]" + e.getMessage());
    }
}

Just set theMode to MODE_WORLD_WRITEABLE or MODE_WORLD_READABLE (note they are deprecated from api lvl 17).

You can also use theContext.getDir(); but note what doc says :

Retrieve, creating if needed, a new directory in which the application can place its own custom data files. You can use the returned File object to create and access files in this directory. Note that files created through a File object will only be accessible by your own application; you can only set the mode of the entire directory, not of individual files.

Best wishes.

Can i Write into Download folder, media folder, or other folder into internal storage? Thank you — Anto, Jun 25 '13 at 09:21

score 3 · Answer 2 · edited Mar 09 '18 at 21:05

You can create a public into a existing system public folder, there is some public folder accessible from internal storage :

public static String DIRECTORY_MUSIC = "Music";
public static String DIRECTORY_PODCASTS = "Podcasts";
public static String DIRECTORY_RINGTONES = "Ringtones";
public static String DIRECTORY_ALARMS = "Alarms";
public static String DIRECTORY_NOTIFICATIONS = "Notifications";
public static String DIRECTORY_PICTURES = "Pictures";
public static String DIRECTORY_MOVIES = "Movies";
public static String DIRECTORY_DOWNLOADS = "Download";
public static String DIRECTORY_DCIM = "DCIM";
public static String DIRECTORY_DOCUMENTS = "Documents";

To create your folder, use this code :

File myDirectory = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS), "MyPublicFolder");
myDirectory.mkdir();

With this example, a public will be created in Documents and can be visible in any file's explorer app for Android.

score -1 · Answer 3 · answered Jun 24 '13 at 16:19

-1

try the below

File mydir = context.getDir("Newfolder", Context.MODE_PRIVATE); //Creating an internal dir;
if(!mydir.exists)
{
     mydir.mkdirs();
}

answered Jun 24 '13 at 16:19

Sunil Kumar

7,086
4
32
50

Context.MODE_PRIVATE - will make that folder privite)) Don't set it if you want to make it public.. – Yakiv Mospan Jun 24 '13 at 16:29
I have tried to don't set it, but i can't see the folder in data/data/My_Package/Folder – Anto Jun 25 '13 at 07:56

score -1 · Answer 4 · edited Jan 27 '20 at 11:44

-1

This is what i have used and is working fine for me:

String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File file = new File(extStorageDirectory, fileName); 
    File parent=file.getParentFile();
            if(!parent.exists()){
                parent.mkdirs();
            }

This will create a new directory if not already present or use the existing if already present.

edited Jan 27 '20 at 11:44

Nidheesh MT

1,074
11
18

answered Jun 24 '13 at 16:21

nehmintu

19
1

Please fix the references to the external storage, since the goal here is to use the internal storage. – Chris Stratton Jun 24 '13 at 18:05
I need write in internal storage – Anto Jun 25 '13 at 07:58

Create a public folder in internal storage

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