Adapter(17)notifyDataSetChanged与notifyDataSetInvalidated区别

在代码中：

public abstract class BaseAdapter implements ListAdapter, SpinnerAdapter {
    private final DataSetObservable mDataSetObservable = new DataSetObservable();

    ...  
    /**
     * Notifies the attached observers that the underlying data has been changed
     * and any View reflecting the data set should refresh itself.
     */
    public void notifyDataSetChanged() {
        mDataSetObservable.notifyChanged();
    }

    /**
     * Notifies the attached observers that the underlying data is no longer valid
     * or available. Once invoked this adapter is no longer valid and should
     * not report further data set changes.
     */
    public void notifyDataSetInvalidated() {
        mDataSetObservable.notifyInvalidated();
    }
    ...
}

 

notifyDataSetChanged ：　　

　　通知它的观察者它监控的数据集数据有变化(如更新，添加，删除)，要该数据对应的view更新。

notifyDataSetInvalidated：　

　　通知它的观察者它监控的数据集不在有效，不在可用，一但调用这个方法之后，adapter就不在可用了，更不要在之后调用notifyDataSetChanged()；