title: Android: method call expected error
body: <p>I've searched internet for that error and have not found right answer. I've got error saying "method call expected" on <code>mPrefsKeys</code> in <code>bindPreferenceSummaryToValue(findPreference(mPrefsKeys(i)))</code></p>
  
  <pre><code>public final static String [] mPrefsKeys = new String[]{"username", "devicename"}
  bindPreferenceSummaryToValue(findPreference(mPrefsKeys(i)))
  
  public Preference findPreference(CharSequence key) {
      if (mPreferenceManager == null) {
          return null;
      }
      return mPreferenceManager.findPreference(key);
  }
  </code></pre>
  
  <p>What that error means?</p>