The folder is not created in the internal memory on android 10

Question

My code with all necessary permissions does not create a folder on android 10 (Writes: "Failed to create folder"). What could be causing this? Help me please - don't really understand the error in my code.

Activity (if you need the rest of the code, I can throw it off):

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button btn = (Button) findViewById(R.id.btn);

    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (hasPermissions()){
                 makeFolder();
            }
            else {
                 method for requesting permission to work with files from the user();
            }
        });
    }

private void makeFolder(){
    File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath(),"Folder");

    if (!file.exists()){
        Boolean ff = file.mkdir();
        if (ff){
             Toast.makeText(MainActivity.this, "Folder created successfully", Toast.LENGTH_SHORT).show();
        }
        else {
             Toast.makeText(MainActivity.this, "Failed to create folder", Toast.LENGTH_SHORT).show();
        }

    }
    else {
        Toast.makeText(MainActivity.this, "Folder already exist", Toast.LENGTH_SHORT).show();
    }
}

Manifest:

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

Answer 1

Let's make it simple. This is the method call to create the folder:

makeFolder ( getFolderPath() );

The method to get the folder path:

public String getFolderPath()
    {
        String path = new File(Environment.getExternalStorageDirectory() + "/New Folder").getPath();
        return path;
    }

Now the main method that creates the folder:

private void makeFolder(String folderPath)
    {
        File file = new File(folderPath);
        if (!file.exists()) {
            file.mkdir();
    Log.i("Folder path: " , " " + folderPath );
        } else {
Log.e("Folder not created" , "Already exists!")
    }
    }

Answer 2

Replace file.mkdir() with file.mkdirs() and this should solve your problem.