code: def init_widget(self):
          
          super(AndroidTextView, self).init_widget()
          d = self.declaration
          w = self.widget
          if d.input_type:
              self.set_input_type(d.input_type)
              w.addTextChangedListener(w.getId())
              w.onTextChanged.connect(self.on_text_changed)
docs: Initialize the underlying widget.