How to query the current active APPs through the adb shell command on Android

Using following codes to detect the current active APPs

adb shell dumpsys activity top | grep ACTIVITY

The We get following outputs :

ACTIVITY com.sina.weibo/.SplashActivity 444fac6 pid=1485
ACTIVITY com.hunantv.imgo.activity/.SplashActivity 834500c pid=19354
ACTIVITY com.coloros.calculator/com.android.calculator2.Calculator 14ea6d8 pid=21857

Listed above are the active APPs.