Code example for PreferenceManager

     */ 
    public Preference findPreference(CharSequence key) {
        if (mPreferenceManager == null) {
            return null; 
        } 
        return mPreferenceManager.findPreference(key);
    } 
 
    /** 
     * Posts a message to bind the preferences to the list view. 
     * <p/> 
     * Binding late is preferred as any custom preference types created in 
     * {@link #onCreate(Bundle)} are able to have their views recycled. 
     */ 
    private void postBindPreferences() { 
        if (mHandler.hasMessages(MSG_BIND_PREFERENCES)) return;
        mHandler.obtainMessage(MSG_BIND_PREFERENCES).sendToTarget();
    } 
 
    private void bindPreferences() {