Android studio读Android源码

1. 配置

进到Android源码目录：
source build/envsetup.sh
lunch sdk_phone_x86
mmm development/tools/idegen/
sh ./development/tools/idegen/idegen.sh

2. 替换android.iml，加快index速度

<?xml version="1.0" encoding="UTF-8"?>
<module version="4" relativePaths="true" type="JAVA_MODULE">
  <component name="ModuleRootManager" />
  <component name="NewModuleRootManager" inherit-compiler-output="true">
    <exclude-output />
    <content url="file://$MODULE_DIR$">
      <!--sourceFolder标签表示需要索引的代码目录-->
      <sourceFolder url="file://$MODULE_DIR$/frameworks/base/core/java" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/gen" isTestSource="false" generated="true" />
      <!--excludeFolder标签表示这个目录下所有内容都不索引-->
      <excludeFolder url="file://$MODULE_DIR$/.repo" />
      <excludeFolder url="file://$MODULE_DIR$/abi" />
      <excludeFolder url="file://$MODULE_DIR$/art" />
      <excludeFolder url="file://$MODULE_DIR$/bionic" />
      <excludeFolder url="file://$MODULE_DIR$/bootable" />
      <excludeFolder url="file://$MODULE_DIR$/build" />
      <excludeFolder url="file://$MODULE_DIR$/cts" />
      <excludeFolder url="file://$MODULE_DIR$/dalvik" />
      <excludeFolder url="file://$MODULE_DIR$/developers" />
      <excludeFolder url="file://$MODULE_DIR$/development" />
      <excludeFolder url="file://$MODULE_DIR$/device" />
      <excludeFolder url="file://$MODULE_DIR$/docs" />
      <excludeFolder url="file://$MODULE_DIR$/external" />
      <excludeFolder url="file://$MODULE_DIR$/external/bluetooth" />
      <excludeFolder url="file://$MODULE_DIR$/external/chromium" />
      <excludeFolder url="file://$MODULE_DIR$/external/emma" />
      <excludeFolder url="file://$MODULE_DIR$/external/icu4c" />
      <excludeFolder url="file://$MODULE_DIR$/external/jdiff" />
      <excludeFolder url="file://$MODULE_DIR$/external/webkit" />
      <excludeFolder url="file://$MODULE_DIR$/frameworks/base/docs" />
      <excludeFolder url="file://$MODULE_DIR$/frameworks/base/tests" />
      <excludeFolder url="file://$MODULE_DIR$/frameworks/base/tools" />
      <excludeFolder url="file://$MODULE_DIR$/hardware" />
      <excludeFolder url="file://$MODULE_DIR$/libcore" />
      <excludeFolder url="file://$MODULE_DIR$/libnativehelper" />
      <excludeFolder url="file://$MODULE_DIR$/ndk" />
      <excludeFolder url="file://$MODULE_DIR$/out" />
      <excludeFolder url="file://$MODULE_DIR$/pdk" />
      <excludeFolder url="file://$MODULE_DIR$/platform_testing" />
      <excludeFolder url="file://$MODULE_DIR$/prebuilt" />
      <excludeFolder url="file://$MODULE_DIR$/sdk" />
      <excludeFolder url="file://$MODULE_DIR$/tools" />
      <excludeFolder url="file://$MODULE_DIR$/vendor" />
      <excludeFolder url="file://$MODULE_DIR$/toolchain" />
      <excludeFolder url="file://$MODULE_DIR$/system" />
      <excludeFolder url="file://$MODULE_DIR$/prebuilts" />
    </content>
    
    <orderEntry type="sourceFolder" forTests="false" />
    <orderEntry type="inheritedJdk" />
    <orderEntryProperties />
  </component>
</module>

3. 打开Androidstudio，导入android.ipr文件

File -> Open，然后打开android.ipr文件就可以了

4. 修改JDK + SDK

由于我用的Android 10的源码，所以需要修改JDK和SDK，然后debug的时候才会识别emulator设备
(1)File -> Settings -> Android SDK -> SDK Platforms -> 添加Andorid 10的sdk
（2）File -> Project Structure -> SDKs -> + -> 选择添加Android 29也就是10的sdk
（3）File -> Project Structure -> Project -> Project SDK -> 选择10的

5. 打开emulator

emulator -verbose -show-kernel

6. 打开debug模式

选择emulator就可以对system_process进行debug了