title: How to check if a file exists?
body: <p>I'm trying to make a method that write a txt plain file on the external memory.. </p>
  
  <p>And it works! .. but i want to insert the Date of creation on the footer of the file thorugh the file.exists() method.</p>
  
  <p>If exists doesn't insert date and if not exists insert the date..</p>
  
  <p>My code is this..</p>
  
  <pre><code>File idea=new File(dir,titulo+".txt");
              FileWriter writer=new FileWriter(idea);
              if (!(idea.exists())){
                  texto.append("\n\n\tCreada :"+new Fecha().toString());
              }
  </code></pre>
  
  <p>Supposing that dir is my path..</p>
  
  <pre><code>    File dir =new File(Environment.getExternalStorageDirectory(),"/CMI");
  </code></pre>
  
  <p>and titulo is a parameter that the metod get when is called .. and contains the filename.</p>
  
  <p>(Fecha it's my Date class that returns a Date as String)</p>