title: Timestamp to string date
body: <p>I don't know how to transform timestamp to date.
  I have:</p>
  
  <pre><code>public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
      TextView czas = (TextView)findViewById(R.id.textView1);
      String S = "1350574775";
      czas.setText(getDate(S));        
  }
  
  
  
  private String getDate(String timeStampStr){
     try{
         DateFormat sdf = new SimpleDateFormat("MM/dd/yyyy");
         Date netDate = (new Date(Long.parseLong(timeStampStr)));
         return sdf.format(netDate);
     } catch (Exception ignored) {
      return "xx";
     }
  } 
  </code></pre>
  
  <p>And answer is: 01/16/1970, but it is wrong.</p>