how to implement log in and log out in android code example

Example 1: android studio log usage

Log.e(String, String); //(error)
Log.w(String, String); //(warning)
Log.i(String, String); //(information)
Log.d(String, String); //(debug)
Log.v(String, String); //(verbose)

Example 2: making Log in android

Log.i("The place or function from where log is made","The log text to show");