root模拟器
$ adb devices
List of devices attached
emulator-5554 device
$ adb root
adbd is already running as root
$ adb shell
generic_x86:/ #
Device File Explorer
使用Device File Explorer查看系统文件：(可以使用Android Studio右上角搜索“Device File Explorer”)
使用systrace查看系统方法调用
官方文档：https://developer.android.com/studio/command-line/systrace
$ cd Library/Android/sdk/platform-tools/systrace/
$ python systrace.py -l
gfx - Graphics
input - Input
view - View System
webview - WebView
wm - Window Manager
am - Activity Manager
sm - Sync Manager
audio - Audio
video - Video
camera - Camera
hal - Hardware Modules
app - Application
res - Resource Loading
dalvik - Dalvik VM
rs - RenderScript
bionic - Bionic C Library
power - Power Management
pm - Package Manager
ss - System Server
database - Database
network - Network
adb - ADB
pdx - PDX services
sched - CPU Scheduling
irq - IRQ Events
i2c - I2C Events
freq - CPU Frequency
idle - CPU Idle
disk - Disk I/O
sync - Synchronization
workq - Kernel Workqueues
memreclaim - Kernel Memory Reclaim
binder_driver - Binder Kernel driver
binder_lock - Binder global lock trace
pagecache - Page cache
执行下面的操作之后，紧接着执行adb install：
$ python systrace.py -t 5 pm
Starting tracing (5 seconds)
Tracing completed. Collecting output...
Outputting Systrace results...
Tracing complete, writing results
Wrote trace HTML file: file:///Users/mengweiping/Library/Android/sdk/platform-tools/systrace/trace.html
$ adb install /Volumes/TOSHIBA_EXT/Github/androidsky/ApkInstallDetail/app/release/app-release.apk
Success
查看trace.html
QQ20180610-143711@2x.png
跟踪系统启动
方法同上，时间改为60，当模拟器刚出现开机界面即执行命令。可以看到系统启动过程中扫描文件夹操作：
scan_dirs.png
查看系统log
例如跟踪apk安装流程，执行adb install命令的同时，可以使用PackageManager过滤查看log：
06-10 14:38:20.781 1706-1742/system_process D/PackageManager: Ephemeral installer not found with new action; try old one
06-10 14:38:20.781 1706-1742/system_process D/PackageManager: Clear ephemeral installer activity
06-10 14:38:25.092 1706-1742/system_process I/PackageManager.DexOptimizer: Running dexopt (dexoptNeeded=1) on: /data/app/com.example.mwp.apkinstalldetail-F3r-1fYdjGaTIuwy2x5NLA==/base.apk pkg=com.example.mwp.apkinstalldetail isa=x86 dexoptFlags=boot_complete,public target-filter=quicken oatDir=/data/app/com.example.mwp.apkinstalldetail-F3r-1fYdjGaTIuwy2x5NLA==/oat sharedLibraries=PCL[]
06-10 14:38:25.559 1706-1742/system_process D/PackageManager: Ephemeral installer not found with new action; try old one
06-10 14:38:25.559 1706-1742/system_process D/PackageManager: Clear ephemeral installer activity
查看进程列表
$ adb shell ps
查看service列表
$ adb shell service list
dumpsys
https://developer.android.com/studio/command-line/dumpsys
例如 查看Activity
$ adb shell dumpsys activity
