转载
https://www.jianshu.com/p/afbee500083b
结构
TextView继承自View
public class TextView extends View implements OnPreDrawListener
Button, CheckedTextView, Chronometer, DigitalClock, EditText
间接子类
AutoCompleteTextView, CheckBox, CompoundButton, ExtractEditText,MultiAutoCompleteTextView, RadioButton, ToggleButton
属性
