Android how to find the package name and activity of the installed APK app

Http://www.51testing.com/html/01/610901-864955.html

Workaround:
A. In the case of source code, find Androidmanifest.xml, find the Android.intent.category.LAUNCHER keyword and you'll find the activity you need.
The package name is seen here; <manifest xmlns:android= "Http://schemas.android.com/apk/res/android"
Package= "Com.chnMicro.MFExchange"
Typically in the next line of XML definitions, searching for "package" will find
B. No source code situation , link good phone --cmd input adb logcat>d:log.txt--run tested App--ctrl+c stop, go to D disk open log File Search " Launcherappinfo "will be able to find activity later.

Android how to find the package name and activity of the installed APK app