Android Java : How To Create Folder Inside Android Devices?

I was developing an app and needed to create a folder inside SD card when button is onClick. I have no idea how to do it. Anyone can help ? Please. @Override protected void onCreat

Solution 1:

3 step:

1. To get sd card is mounted at /sdcard or any other location by using this way:

   Environment.getExternalStorageDirectory();
   

2. You have to take uses-permission entry in the AndroidManifest.xml file:

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

3. If directory already exists, then mkdir return false. Try creatinng new directory if it not exist:

   Filefolder=newFile(Environment.getExternalStorageDirectory() + "/map");
   booleansuccess=true;
   if (!folder.exists()) {
       success = folder.mkdir();
   }
   if (success) {
       // Do something on success
   } else {
       // Do something else on failure 
   }
   

Solution 2:

Try this code

Filedir=newFile( "dir_name");
  dir.mkdirs();

Solution 3:

Try this..

Filef2=newFile(Environment.getExternalStorageDirectory().toString()+"/Folder");   
f2.mkdirs(); 

And also you have to add write permission in Manifest

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

Solution 4:

// create a File object for the parent directoryFilenameofDirectory=newFile("/sdcard/Wallpaper/");
// have the object build the directory structure, if needed.
nameofDirectory.mkdirs();
// create a File object for the output fileFileoutputFile=newFile(nameofDirectory, filename);
// now attach the OutputStream to the file object, instead of a String representationFileOutputStreamfos=newFileOutputStream(outputFile);

don't forget to put permission in android manifest