【Android】getScaledTouchSlop与setCompoundDrawables 函数的说明

时间:12-12-24 栏目:android学习笔记作者:魔豆先生评论:0 点击: 8,082 次

本文标签： getScaledTouchSlop , setCompoundDrawables , setCompoundDrawablesWithIntrinsicBounds

一、关于ViewConfiguration.getScaledTouchSlop函数的功能

ViewConfiguration.getScaledTouchSlop () 作用：是一个距离，表示滑动的时候，手的移动要大于这个距离才开始移动控件。

二、setCompoundDrawables 与 setCompoundDrawablesWithIntrinsicBounds 差别

public void setCompoundDrawables (Drawable left, Drawable top, Drawable right, Drawable bottom)
Since: API Level 1

Sets the Drawables (if any) to appear to the left of, above, to the right of, and below the text. Use null if you do not want a Drawable there. The Drawables must already have had setBounds(Rect) called.

public void setCompoundDrawablesWithIntrinsicBounds (Drawable left, Drawable top, Drawable right, Drawable bottom)
Since: API Level 1

Sets the Drawables (if any) to appear to the left of, above, to the right of, and below the text. Use null if you do not want a Drawable there. The Drawables' bounds will be set to their intrinsic bounds.

翻译：

做了一个测试，大概推出这样的结论：

1、setCompoundDrawables 画的drawable的宽高是按drawable.setBound()设置的宽高，所以才有The Drawables must already have had setBounds(Rect) called.这句话之说。

2、setCompoundDrawablesWithIntrinsicBounds是画的drawable的宽高是按drawable固定的宽高，即通过getIntrinsicWidth()与getIntrinsicHeight()获得，所以才有The Drawables' bounds will be set to their intrinsic bounds.这句话之说！