How to create directory automatically on SD card

AndroidAndroid File

Android Problem Overview

I'm trying to save my file to the following location
FileOutputStream fos = new FileOutputStream("/sdcard/Wallpaper/"+fileName); but I'm getting the exception java.io.FileNotFoundException
However, when I put the path as "/sdcard/" it works.

Now I'm assuming that I'm not able to create directory automatically this way.

Can someone suggest how to create a directory and sub-directory using code?

Android Solutions

Solution 1 - Android

If you create a File object that wraps the top-level directory you can call it's mkdirs() method to build all the needed directories. Something like:

// create a File object for the parent directory
File wallpaperDirectory = new File("/sdcard/Wallpaper/");
// have the object build the directory structure, if needed.
wallpaperDirectory.mkdirs();
// create a File object for the output file
File outputFile = new File(wallpaperDirectory, filename);
// now attach the OutputStream to the file object, instead of a String representation
FileOutputStream fos = new FileOutputStream(outputFile);

Note: It might be wise to use Environment.getExternalStorageDirectory() for getting the "SD Card" directory as this might change if a phone comes along which has something other than an SD Card (such as built-in flash, a'la the iPhone). Either way you should keep in mind that you need to check to make sure it's actually there as the SD Card may be removed.

UPDATE: Since API Level 4 (1.6) you'll also have to request the permission. Something like this (in the manifest) should work:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Solution 2 - Android

Had the same problem and just want to add that AndroidManifest.xml also needs this permission:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Solution 3 - Android

Here is what works for me.

 uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"

in your manifest and the code below

public static boolean createDirIfNotExists(String path) {
	boolean ret = true;

	File file = new File(Environment.getExternalStorageDirectory(), path);
	if (!file.exists()) {
		if (!file.mkdirs()) {
			Log.e("TravellerLog :: ", "Problem creating Image folder");
			ret = false;
		}
	}
	return ret;
}

Solution 4 - Android

Actually I used part of @fiXedd asnwer and it worked for me:

  //Create Folder
  File folder = new File(Environment.getExternalStorageDirectory().toString()+"/Aqeel/Images");
  folder.mkdirs();
 
  //Save the path as a string value
  String extStorageDirectory = folder.toString();

  //Create New file and name it Image2.PNG
  File file = new File(extStorageDirectory, "Image2.PNG");

Make sure that you are using mkdirs() not mkdir() to create the complete path

Solution 5 - Android

With API 8 and greater, the location of the SD card has changed. @fiXedd's answer is good, but for safer code, you should use Environment.getExternalStorageState() to check if the media is available. Then you can use getExternalFilesDir() to navigate to the directory you want (assuming you're using API 8 or greater).

You can read more in the SDK documentation.

Solution 6 - Android

Make sure external storage is present: http://developer.android.com/guide/topics/data/data-storage.html#filesExternal

private boolean isExternalStoragePresent() {

		boolean mExternalStorageAvailable = false;
		boolean mExternalStorageWriteable = false;
		String state = Environment.getExternalStorageState();

		if (Environment.MEDIA_MOUNTED.equals(state)) {
			// We can read and write the media
			mExternalStorageAvailable = mExternalStorageWriteable = true;
		} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
			// We can only read the media
			mExternalStorageAvailable = true;
			mExternalStorageWriteable = false;
		} else {
			// Something else is wrong. It may be one of many other states, but
			// all we need
			// to know is we can neither read nor write
			mExternalStorageAvailable = mExternalStorageWriteable = false;
		}
		if (!((mExternalStorageAvailable) && (mExternalStorageWriteable))) {
			Toast.makeText(context, "SD card not present", Toast.LENGTH_LONG)
					.show();

		}
		return (mExternalStorageAvailable) && (mExternalStorageWriteable);
	}

Solution 7 - Android

Don't forget to make sure that you have no special characters in your file/folder names. Happened to me with ":" when I was setting folder names using variable(s)

not allowed characters in file/folder names

> " * / : < > ? \ |

U may find this code helpful in such a case.

The below code removes all ":" and replaces them with "-"

//actualFileName = "qwerty:asdfg:zxcvb" say...

    String[] tempFileNames;
    String tempFileName ="";
    String delimiter = ":";
    tempFileNames = actualFileName.split(delimiter);
    tempFileName = tempFileNames[0];
    for (int j = 1; j < tempFileNames.length; j++){
    	tempFileName = tempFileName+" - "+tempFileNames[j];
    }
    File file = new File(Environment.getExternalStorageDirectory(), "/MyApp/"+ tempFileName+ "/");
    if (!file.exists()) {
        if (!file.mkdirs()) {
    	Log.e("TravellerLog :: ", "Problem creating Image folder");
    	}
    }

Solution 8 - Android

     //Create File object for Parent Directory
File wallpaperDir = new File(Environment.getExternalStorageDirectory().getAbsoluteFile() +File.separator + "wallpaper");
if (!wallpaperDir.exists()) {
wallpaperDir.mkdir();
}
                      
                     
File out = new File(wallpaperDir, wallpaperfile);
FileOutputStream outputStream = new FileOutputStream(out);

Solution 9 - Android

I faced the same problem. There are two types of permissions in Android:

  • Dangerous (access to contacts, write to external storage...)
  • Normal (Normal permissions are automatically approved by Android while dangerous permissions need to be approved by Android users.)

Here is the strategy to get dangerous permissions in Android 6.0

  • Check if you have the permission granted
  • If your app is already granted the permission, go ahead and perform normally.
  • If your app doesn't have the permission yet, ask for user to approve
  • Listen to user approval in onRequestPermissionsResult

Here is my case: I need to write to external storage.

First, I check if I have the permission:

...
private static final int REQUEST_WRITE_STORAGE = 112;
...
boolean hasPermission = (ContextCompat.checkSelfPermission(activity,
            Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED);
if (!hasPermission) {
    ActivityCompat.requestPermissions(parentActivity,
                new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
                REQUEST_WRITE_STORAGE);
}

Then check the user's approval:

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    switch (requestCode)
    {
        case REQUEST_WRITE_STORAGE: {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED)
            {
                //reload my activity with permission granted or use the features what required the permission
            } else
            {
                Toast.makeText(parentActivity, "The app was not allowed to write to your storage. Hence, it cannot function properly. Please consider granting it this permission", Toast.LENGTH_LONG).show();
            }
        }
    }    
}

Solution 10 - Android

I was facing the same problem, unable to create directory on Galaxy S but was able to create it successfully on Nexus and Samsung Droid. How I fixed it was by adding following line of code:

File dir = new File(Environment.getExternalStorageDirectory().getPath()+"/"+getPackageName()+"/");
dir.mkdirs();

Solution 11 - Android

File sdcard = Environment.getExternalStorageDirectory();
File f=new File(sdcard+"/dor");
f.mkdir();

this will create a folder named dor in your sdcard. then to fetch file for eg- filename.json which is manually inserted in dor folder. Like:

 File file1 = new File(sdcard,"/dor/fitness.json");
 .......
 .....

<

 uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />


and don't forget to add  code in manifest

Solution 12 - Android

Just completing the Vijay's post...

Manifest

uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"

Function

public static boolean createDirIfNotExists(String path) {
    boolean ret = true;

    File file = new File(Environment.getExternalStorageDirectory(), path);
    if (!file.exists()) {
        if (!file.mkdirs()) {
            Log.e("TravellerLog :: ", "Problem creating Image folder");
            ret = false;
        }
    }
    return ret;
}

Usage

createDirIfNotExists("mydir/"); //Create a directory sdcard/mydir
createDirIfNotExists("mydir/myfile") //Create a directory and a file in sdcard/mydir/myfile.txt

You could check for errors

if(createDirIfNotExists("mydir/")){
	 //Directory Created Success
}
else{
	//Error
}

Solution 13 - Android

> This will make folder in sdcard with Folder name you provide.

File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/Folder name");
        if (!file.exists()) {
            file.mkdirs();
        }

Solution 14 - Android

ivmage.setOnClickListener(new View.OnClickListener() {
		
		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			Intent i = new Intent(
	                Intent.ACTION_PICK,
	                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

	        startActivityForResult(i, RESULT_LOAD_IMAGE_ADD);
	        
		}
	});`
Categories
Recommended Android Solutions
Recommended Android File Solutions

Previous Solution:

How to parse the AndroidManifest.xml file inside an .apk package

AndroidAndroid Manifest

Next Solution:

Passing parameters to JavaScript files

JavascriptParameter Passing

Attributions

All content for this solution is sourced from the original question on Stackoverflow.

The content on this page is licensed under the Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license.

Content TypeOriginal AuthorOriginal Content on Stackoverflow
QuestionKshitij AggarwalView Question on Stackoverflow
Solution 1 - AndroidJeremy LoganView Answer on Stackoverflow
Solution 2 - AndroidDanielView Answer on Stackoverflow
Solution 3 - AndroidA B Vijay KumarView Answer on Stackoverflow
Solution 4 - AndroidAmt87View Answer on Stackoverflow
Solution 5 - AndroidNick RuizView Answer on Stackoverflow
Solution 6 - AndroidParth mehtaView Answer on Stackoverflow
Solution 7 - AndroidPraveenView Answer on Stackoverflow
Solution 8 - AndroidvikselnView Answer on Stackoverflow
Solution 9 - AndroidSyed Abdul BasitView Answer on Stackoverflow
Solution 10 - AndroidGarima SrivastavaView Answer on Stackoverflow
Solution 11 - Androidjayant singhView Answer on Stackoverflow
Solution 12 - AndroidIsmael Di VitaView Answer on Stackoverflow
Solution 13 - AndroidShweta ChauhanView Answer on Stackoverflow
Solution 14 - AndroidVishnu NamboodiriView Answer on Stackoverflow