title: Android - Logout from twitter with twitter4j
body: <p><code>twitter4j</code> works fine for Login and share .
  But I am unable to logout from it.
  For logout i am clearing preference, but each time it 
  display last user as logged in. Below is my code for logout,</p>
  
  <pre><code>SharedPreferences mSharedPreferences =getSharedPreferences( "Twitter-Credentials",MODE_WORLD_WRITEABLE); 
  Editor e = mSharedPreferences.edit();
  e.remove(PREF_KEY_OAUTH_TOKEN);
  e.remove(PREF_KEY_OAUTH_SECRET);
  e.remove(PREF_KEY_TWITTER_LOGIN); 
  e.commit();
  </code></pre>
  
  <p>How to solve this problem?</p>