49 lines
727 B
Markdown
49 lines
727 B
Markdown
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# Linux 内核层
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底层驱动，如显卡驱动、音频驱动、蓝牙驱动
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# 系统运行库层
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C/C++库为Android系统提供特性支持
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- 数据库 SQLite
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- 3D绘图 OpenGL|ES
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- 浏览器内核 Webkit
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Java 运行库
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- Dalvik 虚拟机
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- 针对手机内存、CPU做优化
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- 移动设备定制化的Java虚拟机
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# 应用框架层
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提供构建应用程序的各种API，来封装对底层 内核 与 库的使用
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API定义了应用框架
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- ActivityManager
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- WindowManager
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- ResourceManager
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- ViewSystem
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- NotificationManager
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# 应用层
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## 组件
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### Activity
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前端界面
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### Service
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后台服务
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### BroadcastReceiver
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接收广播消息，应用通信
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### ContentProvider
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程序之间共享数据
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