问更新安卓系统中的ArrayAdapter

EN

public void update(List<MyEntity> entities) {
    for (MyEntity entity : entities) {
        int position = this.getPosition(entity);
        if (position >= 0) {
            final MyEntity outdateEntity = this.getItem(position);
            this.insert(entity, position);
            this.remove(outdateEntity);
        } else {
            this.insert(entity, 0);         
        }
    }
}

public int getPosition(MyEntity updatedEntity) {
    for (int i = 0; i < this.getCount(); i++) {
        if (this.getItem(i).getId() == updatedEntity.getId()) {
            return i;
        }
    }
    return -1;
}