Android实现原理_第3页-阿里云

Android帧缓冲区（Frame Buffer）硬件抽象层（HAL）模块Gralloc的实现原理分析（10）

7. 图形缓冲区的注销过程图形缓冲区使用完成之后，就需要从当前进程中注销。前面提到，注销图形缓冲区是由Gralloc模块中的函数gralloc_unregister_buffer来实现的，这...

Android控件TextView的实现原理分析

在前面一个系列的文章中，我们以窗口为单位，分析了WindowManagerService服务的实现。同时，在再前面一个系列的文章中，我们又分析了窗口的组成。简单来说，窗口就是由一系列的视图按照一定的布局组织起来的。实际上，每一个视图都是一个控件，这些控制可以将自己的UI绘制在...

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Android系统的智能指针（轻量级指针、强指针和弱指针）的实现原理分析（4）

回到外层的if语句中，如果目标对象的生命周期是受弱引用计数控制的，就执行下面语句： impl->mBase->onLastWeakRef(id); if ((impl->mFlags&OBJECT_LIFETIME_...

Android帧缓冲区（Frame Buffer）硬件抽象层（HAL）模块Gralloc的实现原理分析（2）

函数load也是实现在文件hardware/libhardware/hardware.c文件中，如下所示： static int load(const char *id, &...

Android帧缓冲区（Frame Buffer）硬件抽象层（HAL）模块Gralloc的实现原理分析（3）

结构体gralloc_module_t定义在文件hardware/libhardware/include/hardware/gralloc.h中，它主要是定义了四个用来操作图形缓冲区的成员函数，如下所示： typedef struct gralloc_m...

Android帧缓冲区（Frame Buffer）硬件抽象层（HAL）模块Gralloc的实现原理分析（11）

为了完整性起见，最后我们再简要分析函数gralloc_lock和gralloc_unlock的实现，以便可以了解一个图形缓冲区的锁定和解锁操作是如何实现的。函数gralloc_lock实现在文件hardwa...

Android视图SurfaceView的实现原理分析

在Android系统中，有一种特殊的视图，称为SurfaceView，它拥有独立的绘图表面，即它不与其宿主窗口共享同一个绘图表面。由于拥有独立的绘图表面，因此SurfaceView的UI就可以在一个独立的线程中进行行绘制。又由于不占用主线程资源，SurfaceView一方面可...

Android中悬浮窗口的实现原理和示例代码

调用WindowManager，并设置WindowManager.LayoutParams的相关属性，通过WindowManager的addView方法创建View，这样产生出来的View根据WindowManager.LayoutParams属性不同，效果也就不同了。比如创建系统顶级窗口，实现悬浮...

android SurfaceView绘制实现原理解析

在Android系统中，有一种特殊的视图，称为SurfaceView，它拥有独立的绘图表面，即它不与其宿主窗口共享同一个绘图表面。由于拥有独立的绘图表面，因此SurfaceView的UI就可以在一个独立的线程中进行绘制。又由于不会占用主线程资源，SurfaceView一方面可以实现复杂而高效的UI，...

Android XListView实现原理讲解及分析

转载自：http://blog.csdn.net/zhaokaiqiang1992/article/details/42392731 XListview是一个非常受欢迎的下拉刷新控件，但是已经停止维护了。之前写过一篇XListview的使用介绍，用起来非常简单，这两天放假无聊，研究了下XListvi...

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更新时间 2024-04-30 00:02:10

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