//back button
adb shell input keyevent 4
//home button
adb shell input keyevent 3
//Search button
adb shell input keyevent 187
//Stop current running app
adb shell am force-stop com.cas.myapp
//com.cas.myapp is app name
//Start activity, adb shell am start -n ｛包(package)名｝/｛包名｝.{活动(activity)名称}
adb shell am start -n com.android.settings/com.android.settings.Settings.NetworkDashboardActivity
//Check running activity:
//check all actvities
adb shell dumpsys activity activities
adb shell dumpsys activity com.source.S1_BDO.BDO activities
//Display app infor: like version infor, permission infor
adb shell dumpsys package [pkgName]
//only display TAG1 infor and above msg and TAG2 Debug and above level msg
adb logcat TAG1:I TAG2:D *:S