I have found a bug, when it is all Chinese sentence and more then one line, the textsize would be divided to min size.
It is because:
https://github.com/AndroidDeveloperLB/AutoFitTextView/blob/master/AutoFitTextViewLibrary/src/com/lb/auto_fit_textview/AutoResizeTextView.java#L89

in Chinese sentence, words was not linked by or -
so the method isValidWordWrap return false everytime in Chinese sentence, and then the sizebecome smaller and smaller(；′⌒`)