Write text file by Java

        String msg="My name is emon";
        String directory_path = Environment.getExternalStorageDirectory().getPath();

        File file = new File(directory_path,"/Android"); //"/Android" is the folder name

        if(!file.exists()){
            file.mkdir();
        }
        if (!file.exists()) {
            file.createNewFile();
        }

        if (file.exists()) {
            try{
                FileWriter writer = new FileWriter(new File( file,"file.txt"));
                writer.append(msg);
                writer.flush();
                writer.close();
                Toast.makeText(this,"File is created",Toast.LENGTH_LONG).show();

            }catch (Exception e){
                e.printStackTrace();
                Toast.makeText(this,"File is not created "+e.getMessage(),Toast.LENGTH_LONG).show();

            }

        }