I wanted to create some folders and some files to /storage/MyFolder/.
I had tried to work on using /storage/emulated/0/MyFolder and it is working but i want to make hide under the storage root folder.
Is there any possible way for me to do this?
You can create folder like this in External Storage directory:
String folder_main = "NewFolder";
File f = new File(Environment.getExternalStorageDirectory(), folder_main);
if (!f.exists()) {
f.mkdirs();
}
//get path to external storage (SD card)
String iconsStoragePath = Environment.getExternalStorageDirectory() + "/Abc/";
File sdIconStorageDir = new File(iconsStoragePath);
//create storage directories, if they don't exist
if(!sdIconStorageDir.exists()){
sdIconStorageDir.mkdirs();
}
i have tried most of the code i have found on stack over flow read the devlopment documentation but i still fail to create a folder and a file on internal storage in android lollipop i have not tried on lower api but i even tried those internal persmission declaration in manifest.
the below sample of the code i tried do not even work for my situation:
String path = Environment.getDataDirectory().getAbsolutePath().toString() + "/storage/emulated/0/appFolder";
File mFolder = new File(path);
if (!mFolder.exists()) {
mFolder.mkdir();
}
File Directory = new File("/sdcard/myappFolder/");
Directory.mkdirs();
i tried this also below:
File myDir = context.getFilesDir();
// Documents Path
String documents = "documents/data";
File documentsFolder = new File(myDir, documents);
documentsFolder.mkdirs();
String publicC = "documents/public/api.txt" ;
File publicFolder = new File(myDir, publicC);
publicFolder.mkdirs();
and then this as well:
ContextWrapper contextWrapper = new ContextWrapper(
getApplicationContext());
File directory = contextWrapper.getDir(filepath, Context.MODE_PRIVATE);
myInternalFile = new File(directory, filename);
First, I recommend you read more on what the following terms mean with respect to Android app development:
internal storage
external storage
removable storage
With that as background, let's review what you did:
Environment.getDataDirectory().getAbsolutePath().toString() + "/storage/emulated/0/appFolder";
Never use getDataDirectory(). I have no idea where this code would point to.
File Directory = new File("/sdcard/myappFolder/");
You do not have arbitrary read/write access to removable storage, and removable storage may not be found at that location anyway.
File myDir = context.getFilesDir();
// Documents Path
String documents = "documents/data";
File documentsFolder = new File(myDir, documents);
This code is fine. However, it points to internal storage, and on Android devices, you cannot see internal storage very readily. That too is fine, as developers should be used to the idea that they cannot see everything that their code affects. You might consider writing test cases to confirm that your directory was created.
String publicC = "documents/public/api.txt" ;
File publicFolder = new File(myDir, publicC);
This points to nowhere. Always use some method to derive the base path.
ContextWrapper contextWrapper = new ContextWrapper(
getApplicationContext());
File directory = contextWrapper.getDir(filepath, Context.MODE_PRIVATE);
myInternalFile = new File(directory, filename);
The ContextWrapper is useless. filepath needs to be a simple directory name. You could simplify this as:
File directory = getDir(directoryName, Context.MODE_PRIVATE);
myInternalFile = new File(directory, filename);
Then this code is also fine. It too points to internal storage, and therefore you will not be able to examine it directly. Once again, write test code to confirm that the directory was created as you expect.
I am trying to save a file in my External SDcard but the file is getting stored in internal storage. How to store the file in the SDcard inserted
mr = new MediaRecorder();
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)){
Log.e("aa","sss");
cameraFolder = new File(android.os.Environment.getExternalStorageDirectory(), "Recorder");
} else {
cameraFolder= getDir("Recorder",MODE_PRIVATE);
}
if(!cameraFolder.exists()) {
cameraFolder.mkdir();
}
fname = cameraFolder + "/myrec1.MPEG_4";
There is already a similar question here, you can also find more detailed information on the android docs
As suggested in a comment below I'll improve this answer.
In order to save a file to a specific position in your SD card you need to create a File object which points to that position:
File sdCard = Environment.getExternalStorageDirectory();
File dir = new File (sdCard.getAbsolutePath() + "/your/file/directory");
dir.mkdirs();
File file = new File(dir, "filename");
and then use a FileOutputStream to write the content.
Remember that you need to add the required permission in the manifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
I cannot create a folder in android External Storage Directory.
I have added permissing on manifest,
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Here is my code:
String Path = Environment.getExternalStorageDirectory().getPath().toString()+ "/Shidhin/ShidhiImages";
System.out.println("Path : " +Path );
File FPath = new File(Path);
if (!FPath.exists()) {
if (!FPath.mkdir()) {
System.out.println("***Problem creating Image folder " +Path );
}
}
Do it like this :
String folder_main = "NewFolder";
File f = new File(Environment.getExternalStorageDirectory(), folder_main);
if (!f.exists()) {
f.mkdirs();
}
If you wanna create another folder into that :
File f1 = new File(Environment.getExternalStorageDirectory() + "/" + folder_main, "product1");
if (!f1.exists()) {
f1.mkdirs();
}
The difference between mkdir and mkdirs is that mkdir does not create nonexistent parent directory, while mkdirs does, so if Shidhin does not exist, mkdir will fail. Also, mkdir and mkdirs returns true only if the directory was created. If the directory already exists they return false
getexternalstoragedirectory() is already deprecated. I got the solution it might be helpful for you. (it's a June 2021 solution)
Corresponding To incliding Api 30, Android 11 :
Now, use this commonDocumentDirPath for saving files.
Step: 1
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Step: 2
public static File commonDocumentDirPath(String FolderName){
File dir = null ;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
dir = new File (Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS)+ "/"+FolderName );
} else {
dir = new File(Environment.getExternalStorageDirectory() + "/"+FolderName);
}
return dir ;
}
The use of Environment.getExternalStorageDirectory() now is deprecated since API level 29, the option is using:
Context.getExternalFilesDir().
Example:
void createExternalStoragePrivateFile() {
// Create a path where we will place our private file on external
// storage.
File file = new File(getExternalFilesDir(null), "DemoFile.jpg");
try {
// Very simple code to copy a picture from the application's
// resource into the external file. Note that this code does
// no error checking, and assumes the picture is small (does not
// try to copy it in chunks). Note that if external storage is
// not currently mounted this will silently fail.
InputStream is = getResources().openRawResource(R.drawable.balloons);
OutputStream os = new FileOutputStream(file);
byte[] data = new byte[is.available()];
is.read(data);
os.write(data);
is.close();
os.close();
} catch (IOException e) {
// Unable to create file, likely because external storage is
// not currently mounted.
Log.w("ExternalStorage", "Error writing " + file, e);
}
}
void deleteExternalStoragePrivateFile() {
// Get path for the file on external storage. If external
// storage is not currently mounted this will fail.
File file = new File(getExternalFilesDir(null), "DemoFile.jpg");
file.delete();
}
boolean hasExternalStoragePrivateFile() {
// Get path for the file on external storage. If external
// storage is not currently mounted this will fail.
File file = new File(getExternalFilesDir(null), "DemoFile.jpg");
return file.exists();
}
I can create a folder in android External Storage Directory.
I have added permissing on manifest,
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Here is my code:
String folder_main = "Images";
File outerFolder = new File(Environment.getExternalStorageDirectory(), folder_main);
File inerDire = new File(outerFolder.getAbsoluteFile(), System.currentTimeMillis() + ".jpg");
if (!outerFolder.exists()) {
outerFolder.mkdirs();
}
if (!outerFolder.exists()) {
inerDire.createNewFile();
}
outerFolder.mkdirs(); // This will create a Folder
inerDire.createNewFile(); // This will create File (For E.g .jpg
file)
we can Create Folder or Directory on External storage as :
String myfolder=Environment.getExternalStorageDirectory()+"/"+fname;
File f=new File(myfolder);
if(!f.exists())
if(!f.mkdir()){
Toast.makeText(this, myfolder+" can't be created.", Toast.LENGTH_SHORT).show();
}
else
Toast.makeText(this, myfolder+" can be created.", Toast.LENGTH_SHORT).show();
}
and if we want to create Directory or folder on Internal Memory then we will do :
File folder = getFilesDir();
File f= new File(folder, "doc_download");
f.mkdir();
But make Sure you have given Write External Storage Permission.
And Remember that if you have no external drive then it choose by default to internal parent directory.
I'm Sure it will work .....enjoy code
If you are trying to create a folder inside your app directory in your storage.
Step 1 : Add Permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Step 2 : Add the following
private String createFolder(Context context, String folderName) {
//getting app directory
final File externalFileDir = context.getExternalFilesDir(null);
//creating new folder instance
File createdDir = new File(externalFileDir.getAbsoluteFile(),folderName);
if(!createdDir.exists()){
//making new directory if it doesn't exist already
createdDir.mkdir();
}
return finalDir.getAbsolutePath() + "/" + System.currentTimeMillis() + ".txt";
}
This is raw but should be enough to get you going
// create folder external located in Data/comexampl your app file
File folder = getExternalFilesDir("yourfolder");
//create folder Internal
File file = new File(Environment.getExternalStorageDirectory().getPath( ) + "/RICKYH");
if (!file.exists()) {
file.mkdirs();
Toast.makeText(MainActivity.this, "Make Dir", Toast.LENGTH_SHORT).show();
}
Try adding
FPath.mkdirs();
(See http://developer.android.com/reference/java/io/File.html)
and then just save the file as needed to that path, Android OS will create all the directories needed.
You don't need to do the exists checks, just set that flag and save.
(Also see : How to create directory automatically on SD card
I found some another thing too :
I had the same problem recently, and i tryed abow solutions and they did not work...
i did this to solve my problem :
I added this permission to my project manifests file :
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
(plus READ and WRITE permissions) and my app just worked correctly.
try {
String filename = "SampleFile.txt";
String filepath = "MyFileStorage";
FileInputStream fis = new FileInputStream(myExternalFile);
DataInputStream in = new DataInputStream(fis);
BufferedReader br =
new BufferedReader(new InputStreamReader(in));
String strLine;
while ((strLine = br.readLine()) != null) {
myData = myData + strLine;
}
in.close();
} catch (IOException e) {
e.printStackTrace();
}
inputText.setText(myData);
response.setText("SampleFile.txt data retrieved from External Storage...");
}
});
if (!isExternalStorageAvailable() || isExternalStorageReadOnly()) {
saveButton.setEnabled(false);
}
else {
myExternalFile = new File(getExternalFilesDir(filepath), filename);
}
I am programming a notepad android app but I am having difficulties with my Open button. How do i implement it so that when I click on it, a dialog box comes up with the .txt files saved in the folder I created on the SD card? Also, how do i load the chosen file to my current activity?
Thank You
Try the Following,
File f = new File(Environment.getExternalStorageDirectory() +"/"+ dirname);
if(f.isDirectory())
{
ArrayList<String> files= new ArrayList<String>();
File file = new File(Environment.getExternalStorageDirectory() +"/"+ dirname+"/");
File fileList[] = file.listFiles();
for(int i=0;i<fileList.length;i++)
{
files.add(filelist[i].getAbsolutePath());
//here you can get all files.
}
}