Mr.Alright—使用AndroidStudio断点调试安卓源码

我为甚要用AS来调试安卓源码呢？来自尼克杨的疑问

当然是因为爽啦！之前都是开发app，后面接触到了修改系统源码，App调试的时候可以断点调试，省去了一部分加log的麻烦，所以希望源码也可以这样，于是有了下面方案。

1.首先你要有系统源码，还要有linux的环境，至于源码的下载，linux的安装配置，大家先问下度娘

2.上面的环境配置好之后，执行

source build/envsetup.sh

初始化了一些函数，接着执行

make idegen -j32

执行完这个，会生成idegen.jar ，接着执行

sh ./development/tools/idegen/idegen.sh

执行完这个就会生成，AS需要的一些文件 android.ipr、android.iml

android.ipr：通常是保存工程编译器配置，入口，相关LIBRARIES等配置

android.iml：主要描述了modules的路径，依赖关系等

3.到这里，双击android.ipr 就可以用AS打开项目了，但是如果真的要直接打开，AS会加载的非常慢，毕竟安卓源码是非常庞大的，所以需要对android.iml处理，只添加我们需要的目录即可，下面简单介绍下android.iml的标签，之后会上传一份模板

关于<sourceFolder>标签：

通需要的文件添加到这里面，其他的删除，如package、framework
<sourceFolder url="file://$MODULE_DIR$/packages" isTestSource="false" />
<sourceFolder url="file://$MODULE_DIR$/frameworks" isTestSource="false" />

关于<excludeFolder>标签：

exclude顾名思义就是不包含的意思，不需要的添加到这里面，如vendor、external

<excludeFolder url="file://$MODULE_DIR$/vendor" />

<excludeFolder url="file://$MODULE_DIR$/external" />

关于<orderEntry>标签：

保留这两个就可以了

<orderEntry type="sourceFolder" forTests="false" />

<orderEntry type="jdk" jdkName="Android API 24 Platform" jdkType="Android SDK" />

android.iml
<?xml version="1.0" encoding="UTF-8"?>
<module version="4" relativePaths="true" type="JAVA_MODULE">
  <component name="FacetManager">
    <facet type="android" name="Android">
      <configuration />
    </facet>
  </component>
  <component name="ModuleRootManager" />
  <component name="NewModuleRootManager" inherit-compiler-output="true">
    <exclude-output />
    <content url="file://$MODULE_DIR$">
      <sourceFolder url="file://$MODULE_DIR$/packages/apps/Launcher3" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/packages/wallpapers/LivePicker" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/vendor/mediatek/proprietary/packages/apps/SystemUI" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/frameworks/base/services" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/frameworks/base/core/java" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/frameworks/base/core/res" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/frameworks/base/packages/SystemUI" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/frameworks/libs/systemui" isTestSource="false" />
      <sourceFolder url="file://$MODULE_DIR$/gen" isTestSource="false" generated="true" />
      <excludeFolder url="file://$MODULE_DIR$/.repo" />
      <excludeFolder url="file://$MODULE_DIR$/FeatrueTableSpec" />
      <excludeFolder url="file://$MODULE_DIR$/abi" />
      <excludeFolder url="file://$MODULE_DIR$/apps" />
      <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://$MODULE_DIR$/ccu_tool" />
      <excludeFolder url="file://$MODULE_DIR$/compatibility" />
      <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://$MODULE_DIR$/frameworks" />
      <excludeFolder url="file://$MODULE_DIR$/hardware" />
      <excludeFolder url="file://$MODULE_DIR$/kernel" />
      <excludeFolder url="file://$MODULE_DIR$/kernel-3.18" />
      <excludeFolder url="file://$MODULE_DIR$/kernel-4.4" />
      <excludeFolder url="file://$MODULE_DIR$/kernel-4.19" />
      <excludeFolder url="file://$MODULE_DIR$/kernel-4.19-lc" />
      <excludeFolder url="file://$MODULE_DIR$/kernel-4.14" />
      <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://$MODULE_DIR$/packages" />
      <excludeFolder url="file://$MODULE_DIR$/pdk" />
      <excludeFolder url="file://$MODULE_DIR$/phoenix" />
      <excludeFolder url="file://$MODULE_DIR$/platform_testing" />
      <excludeFolder url="file://$MODULE_DIR$/prebuilt" />
      <excludeFolder url="file://$MODULE_DIR$/prebuilts" />
      <excludeFolder url="file://$MODULE_DIR$/res" />
      <excludeFolder url="file://$MODULE_DIR$/sdk" />
      <excludeFolder url="file://$MODULE_DIR$/system" />
      <excludeFolder url="file://$MODULE_DIR$/test" />
      <excludeFolder url="file://$MODULE_DIR$/toolchain" />
      <excludeFolder url="file://$MODULE_DIR$/tools" />
      <excludeFolder url="file://$MODULE_DIR$/trusty" />
      <excludeFolder url="file://$MODULE_DIR$/vendor" />
    </content>
    <orderEntry type="sourceFolder" forTests="false" />
    <orderEntry type="jdk" jdkName="Android API 30 Platform" jdkType="Android SDK" />
  </component>
</module>

这样AS的只会去索引你添加的sourceFolder ，其他的都不添加，就会快了很多

4.该文件在AS安装目录下面，bin文件夹下
64位的修改studio64.exe.vmoptions、32位的修改studio.exe.vmoptions
-Xms1024m 修改这个，表示的是分配给studio的内存大小
-Xmx1280m

5.打开AS，选择open exist...,选择刚生成的android.ipr
这时候会快很多，因为好多索引我们都去除了，如果需要，再添加回来就是了
等待漫长的indexing...

6.添加一个安卓app，选择要调试的进程即可

8.最终效果如下图，比如我调试的是系统的launcher3