@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // setContentView(R.layout.activity_main); LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); // inflate your activity layout here! View contentView = inflater.inflate(R.layout.folder_list_activity_main, null, false); mDrawerLayout.addView(contentView, 0); androidOpenDbHelperObj = new NoteshareDatabaseHelper(context); sqliteDatabase = androidOpenDbHelperObj.getWritableDatabase(); DataManager.sharedDataManager().setSelectedIndex(-1); initlizeUIElement(contentView); // getDeafultNote(); getallNotes(); // getAllFolder(); }