Android模拟器开发和调试应用肯定比使用真机方便
模拟器源码下载
Android 模拟器源码的下载与 Android AOSP 源码库的下载过程类似。
模拟器的分支：在 https://android.googlesource.com/platform/manifest/+refs 可以看到所有可以指定的分支，包括 Android 分支和模拟器分支，其中模拟器分支主要有如下这些：
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| emu-1.4-release
emu-1.5-release
emu-2.0-release
emu-2.2-release
emu-2.3-release
emu-2.4-arc
emu-2.4-release
emu-2.5-release
emu-2.6-release
emu-2.7-release
emu-2.8-release
emu-29.0-release
emu-3.0-release
emu-3.1-release
emu-gn-dev
emu-master-dev
emu-master-qemu
emu-master-qemu-release
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下载最新模拟器代码：
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| $ repo init -u https://android.googlesource.com/platform/manifest -b emu-master-dev
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在国内可以使用清华源更快下载:
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| repo init -u https://aosp.tuna.tsinghua.edu.cn/platform/manifest -b emu-master-dev
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编译
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| cd external/qemu/android/
./rebuild.sh --no-tests
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--no-tests: 告诉编译系统，编译完成之后不要执行测试程序，以节省时间，提高效率
Android Hardware OpenGLES emulation design overview
path: external/qemu/android/android-emugl/DESIGN
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| _________ __________ __________
| | | | | |
|EMULATION| |EMULATION | |EMULATION | GUEST
| EGL | | GLES 1.1 | | GLES 2.0 | SYSTEM
|_________| |__________| |__________| LIBRARIES
^ ^ ^
| | |
- - | - - - - - - - - - | - - - - - - - - - | - - - - -
| | |
____v____________________v____________________v____ GUEST
| | KERNEL
| QEMU PIPE |
|___________________________________________________|
^
|
- - - - - - - - - - - -|- - - - - - - - - - - - - - - -
|
| PROTOCOL BYTE STREAM
_____v_____
| |
| EMULATOR |
|___________|
^
| UNMODIFIED PROTOCOL BYTE STREAM
_____v_____
| |
| RENDERER |
|___________|
^ ^ ^
| | |
+-----------------+ | +-----------------+
| | |
____v____ ___v______ ____v_____
| | | | | |
|TRANSLATOR |TRANSLATOR| |TRANSLATOR| HOST
| EGL | | GLES 1.1 | | GLES 2.0 | TRANSLATOR
|_________| |__________| |__________| LIBRARIES
^ ^ ^
| | |
- - | - - - - - - - - - | - - - - - - - - - | - - - - -
| | |
____v____ ____v_____ _____v____ HOST
| | | | | | SYSTEM
| GLX | | GL 2.0 | | GL 2.0 | LIBRARIES
|_________| |__________| |__________|
(NOTE: 'GLX' is for Linux only, replace 'AGL' on OS X, and 'WGL' on Windows).
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