This method is called when the entire data set has changed, init datas

This method is called when the entire data becomes invalid, setListener

set Content-ItemView longClick listener

set Content-ItemView click listener

set Index-ItemView longClick listener

display Center OverlayView

display Material Design OverlayView

List<T> -> List<Indexable<T>

不想显示哪个就传null @param index IndexBar的字母索引 @param indexTitle IndexTitle @param datas 数据源

get OverlayView

get RecyclerView

Invokes {@link DataObserver#onChanged} on each observer. Called when the contents of the data set have changed. The recipient will obtain the new con

Notifies the attached observers that the underlying data has been changed and any View reflecting the data set should refresh itself.

Invokes {@link DataObserver#onInited()} on each observer. Called when the data set is no longer valid and cannot be queried again, such as when the d

Invokes {@link DataObserver#onSetListener(int)} on each observer. Called when the data set is no longer valid and cannot be queried again, such as whe

This method is called when the entire data set has changed, refresh UI

This method is called when the entire data set has changed, refresh UI