onAttachedToWindow () 和 onDetachedFromWindow ()
来源:互联网 发布:debian ubuntu 内存 编辑:程序博客网 时间:2024/05/18 02:47
protected void onAttachedToWindow()
This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called beforeonDraw(android.graphics.Canvas)
, however it may be called any time before the first onDraw -- including before or afteronMeasure(int, int)
.See Also
onDetachedFromWindow()
如果你在自己的view中Override了这个方法。那么我们最关注的是它什么时候调用?
从开发文档中我们可以看出,onAttachedToWindow是在第一次onDraw前调用的。也就是我们写的View在没有绘制出来时调用的,但只会调用一次。
比如,我们写状态栏中的时钟的View,在onAttachedToWindow这方法中做初始化工作,比如注册一些广播等等……
与onAttachedToWindow 相反的则是这个方法:
protected void onDetachedFromWindow()
Since: API Level 1
This is called when the view is detached from a window. At this point it no longer has a surface for drawing.
See Also
onAttachedToWindow()
开发文档就简单的两句。也就是我们销毁View的时候。我们写的这个View不再显示。
这时我们就在这个方法做一些收尾工作,如:取消广播注册等等。
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow () 和 onDetachedFromWindow ()
- onAttachedToWindow和onDetachedFromWindow
- onAttachedToWindow和onDetachedFromWindow?
- Android重写view时onAttachedToWindow () 和 onDetachedFromWindow ()
- Android重写view时onAttachedToWindow () 和 onDetachedFromWindow ()
- Android重写view时onAttachedToWindow () 和 onDetachedFromWindow ()
- Android重写view时onAttachedToWindow () 和 onDetachedFromWindow ()
- Android重写view时onAttachedToWindow () 和 onDetachedFromWindow ()
- Android重写view时onAttachedToWindow () 和 onDetachedFromWindow ()
- Android重写view时onAttachedToWindow () 和 onDetachedFromWindow () .
- 2.JSTL国际化:资源文件
- POJ 2777(涂点问线)
- KVM 网络 资料整理(网上收集)(这个真的很好)
- 使用hash直接登陆windows
- 提供 云上有价值的服务
- onAttachedToWindow () 和 onDetachedFromWindow ()
- 设计模式--观察者模式(行为类模式)
- VC++多线程编程实例讲解(入门)
- Android源码二次开发+ubantu11.10配置Android 开发环境
- 利用inf文件添加shift后门
- cannot convert parameter 1 from 'std::string' to 'const char *'
- UIImageView
- SAS接口完全互连指南(SATA到MINI SAS发展履历)
- pkm的linq to Entities学习1