appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_HOME_AS_UP);
// Initialize the database handler. `this` specifies the context. The two `null`s do not specify the database name or a `CursorFactory`. The `0` is to specify a database version, but that is set instead using a constant in `BookmarksDatabaseHelper`.
appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_HOME_AS_UP);
// Initialize the database handler. `this` specifies the context. The two `null`s do not specify the database name or a `CursorFactory`. The `0` is to specify a database version, but that is set instead using a constant in `BookmarksDatabaseHelper`.