ObjectAnimator

1、所控制的对象必须有get***方法

2、所控制的对象必须有set***方法

如

TextView m_textView = (TextView)findViewById(R.id.id_textview);

ObjectAnimator objectAnimator = (ObjectAnimator)ofFloat(m_textView,"alpha",0f,1f);

objectAnimator.setDuration(3000);

objectAnimator.start();

或者：

TextView m_textView = (TextView)findViewById(R.id.id_textview);

ObjectAnimator objectAnimator = (ObjectAnimator)ofFloat(m_textView,"textSize",20f,100f);

objectAnimator.setDuration(3000);

objectAnimator.start();