title: sharedpreferences doesn't save data
body: <p>i want to save data in the first activity and use it in the second activity, on the first activity i used this:</p>
  
  <pre><code>android.content.SharedPreferences someData;
  public static String filename = "mySharedString";
  someData = getSharedPreferences(filename, 0);
  android.content.SharedPreferences.Editor editor = someData.edit();
  editor.putString("HostIP", "192.168.1.101");
  </code></pre>
  
  <p>in the second activity i used this</p>
  
  <pre><code>android.content.SharedPreferences someData;
  TextView Message;
  public static String filename = "mySharedString";
  String HostIP;
  someData = getSharedPreferences(filename, 0);
  HostIP = someData.getString("HostIP", "0");
  phoneNumber.setText(HostIP);
  </code></pre>
  
  <p>but the results prints on phonenumber is <code>0</code> not <code>192.168.1.101</code></p>