1.抓取btsnoop log
使能开发者模式。设置，关于，版本号，连续点击
adb root
adb shell
setprop persist.bluetooth.btsnooppath /data/misc/bluetooth/logs/btsnoop_hci.cfa
setprop persist.bluetooth.btsnoopenable true
setprop persist.bluetooth.btsnooplogmode full
重启
抓 btsnoop 之前，先关蓝牙，然后再打开
测试，复现问题
复现到后，把 btsnoop 文件及时 pull 出来，否则重新开关蓝牙，会删掉之前的 btsnoop
同时，导出此过程 logcat
adb pull /data/misc/bluetooth/logs/btsnoop_hci.cfa ./btsnoop_hci.cfa
adb logcat -d > logcat
setprop persist.bluetooth.btsnoopenable true
setprop persist.bluetooth.btsnooplogmode full
setprop persist.bluetooth.btsnoopdefaultmode full
setprop persist.bluetooth.btsnoopsize 0xfffffff
setprop persist.bluetooth.btsnooppath /data/misc/bluetooth/logs/btsnoop_hci.log