If yes, then how? Does Logcat also log events like starting time of application on its own, or the application has to use something like Log.v(App_name,message) at the start of the application?
exactly Sashi : aLogCat is basical, but if you want your own reader, there is a special permission for this : Read_logs.
The least you can see is an entry from the ActivityManager : looking like this approx.
- Timestamp - INFO/ActivityManager(7703): Starting: Intent {act=android.intent.action.MAIN
cat= [android.intent.category.LAUNCHER]cmp=com.lemonde.androidapp/.SplashActivity
bnds=[5,553][115,671] } from pid 7786
and here is an interesting tutorial
Good luck !
There are a few applications in the market that will let you view the logcat on the phone. One example is aLogCat. Also, I'm pretty sure that it does log a message when the application gets loaded (certainly for the activity being started.
来源：https://stackoverflow.com/questions/6376889/can-i-see-the-logcat-on-the-android-phone-itself-without-connecting-it-to-the-c