在源代码目录下执行命令编译
. build/envsetup.sh
mmm development/tools/idegen/
. development/tools/idegen/idegen.sh完成以上之后，会发现在源码根目录下出现了两个新的文件
1. android.iml (记录项目所包含的module、依赖关系、SDK版本等等，类似一个XML文件)
2. android.ipr (工程的具体配置，代码以及依赖的lib等信息，类似于Visual Studio的sln文件)
修改文件权限
sudo chmod 777 android.iml
sudo chmod 777 android.ipr修改android.iml文件，排除掉不需要导入的目录，第一次导入快一些
<excludeFolder url="file://$MODULE_DIR$/.repo" />
<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://$MODULE_DIR$/compatibility" />
<excludeFolder url="file://$MODULE_DIR$/dalvik" />
<excludeFolder url="file://$MODULE_DIR$/developers" />
<excludeFolder url="file://$MODULE_DIR$/developers/samples" />
<excludeFolder url="file://$MODULE_DIR$/development" />
<excludeFolder url="file://$MODULE_DIR$/device/google" />
<excludeFolder url="file://$MODULE_DIR$/device/sample" />
<excludeFolder url="file://$MODULE_DIR$/docs" />
<excludeFolder url="file://$MODULE_DIR$/external" />
<excludeFolder url="file://$MODULE_DIR$/flashing-files" />
<excludeFolder url="file://$MODULE_DIR$/frameworks/base/docs" />
<excludeFolder url="file://$MODULE_DIR$/kernel" />
<excludeFolder url="file://$MODULE_DIR$/libcore" />
<excludeFolder url="file://$MODULE_DIR$/libnativehelper" />
<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://$MODULE_DIR$/prebuilts" />
<excludeFolder url="file://$MODULE_DIR$/shortcut-fe" />
<excludeFolder url="file://$MODULE_DIR$/test" />
<excludeFolder url="file://$MODULE_DIR$/toolchain" />
<excludeFolder url="file://$MODULE_DIR$/tools" />
用Android studio打开android.ipr打开源码工程
配置sdk版本，我的源码是7.1.1的
选择刚配置的android25，应用即可。
这样点击AMS的时候，是直接跳到AMS源代码里，而不是jar里的class