IconicsTextView's setText() shows the invalid icons on Lenovel TAB2.

![from](https://user-images.githubusercontent.com/14036928/28655789-a0072fc0-72d0-11e7-9c05-a20c657cd86d.png)
![to](https://user-images.githubusercontent.com/14036928/28655790-a007d3ee-72d0-11e7-84f3-dc60c432c00f.png)

Precondition:
1: use google material design,
2: Lenovel tablet OS Android 5.0.1.
Reproduce steps:
1: set the data source which contains a list of strings using the template of "{gmd-icon-name}" to the dapter, and the adapter contains the item IconicsTextView,
2: show the ListView.
Results:
the icons switch quickly to invalid.
Note:
1: please read the from.png and to.png.
2: here is the source code: https://github.com/annawang1/Lenovel