1 手機要有root權限

2 下載tcpdump

android模擬器上linux里面有的會自帶。

3 adb push c:\wherever_you_put\tcpdump /data/local/tcpdump

4 adb shell chmod 6755 /data/local/tcpdump

5 adb shell, su獲得root權限

6 cd /data/local

7 ./tcpdump -i any -p -s 0 -w /sdcard/capture.pcap

命令參數：

        # "-i any": listen on any network interface

　　# "-p": disable promiscuous mode (doesn't work anyway)

　　# "-s 0": capture the entire packet

　　# "-w": write packets to a file (rather than printing to stdout)

　　... do whatever you want to capture, then ^C to stop it ...

8 adb pull /sdcard/capture.pcap d:/

9 在電腦上用wireshark打開capture.pcap即可分析log

Execute the following if you would like to watch packets go by rather than capturing them to a file (-n skips DNS lookups. -s 0 captures the entire packet rather than just the header):

adb shell tcpdump -n -s 0   

Typical tcpdump options apply. For example, if you want to see HTTP traffic:

只監聽http

adb shell tcpdump -X -n -s 0 port 80

根據以上的信息，寫一個bat去執行（tcpdump文件必須在當前目錄里）。

開始tcpdump

adb push tcpdump /data/local/tcpdump
adb shell chmod 6755 /data/local/tcpdump
adb shell rm -r /sdcard/capture.pcap
adb shell  /data/local/tcpdump -i any -p -s 0 -w /sdcard/capture.pcap
pause

下載tcpdump文件到電腦

 adb pull /sdcard/capture.pcap capture.pcap 

問題：有些機器root后通過adb shell 后，默認不是root用戶，需要輸入 su才能切換到root，這樣在執行批處理會有問題，解決方法如下

adb shell "su -c 'sleep 1'"
adb start-server
adb push tcpdump /data/local/tcpdump 

因沒有root權限導致的問題

adb shell su -c "/data/local/tmp/tcpdump -i any -p -s 0 -w /sdcard/netCapture.pcap"