2.3.0

fixbug #425

2.2.9

rm com.android.support.constraint:constraint-layout

2.2.4

fixbug #416

2.2.3

fix #373

2.2.2

fixbug #354

2.2.1

fix bug

2.2.0

rm android:allowBackup="false"

2.1.9

android:allowBackup="false" to ensure security。

2.1.8

Add getLevel() method in IExpandable interface.

2.1.7

add addData(T data) methods