Android print information

The general printing method of Java is system. Out. println (""); the result is also displayed on the IDE console. HoweverAndroidPlatform, system. Out. println (""); you cannot see the printed message. Because the printing method provided by Android is log. V, this object needs to be imported
Import Android. util. log; then you can use it. The location where you can view the results is not in the IDE console Panel. In the logcat panel provided by Android, you can select the debug mode in the upper right corner of the IDE to view the logcat panel.

 Import android. app. activity; import android. OS. bundle; import android. util. log; import android. widget. textview; public class learnmain extends activity {/** called when the activity is first created. * // @ override public void oncreate (bundle savedinstancestate) {super. oncreate (savedinstancestate); // setcontentview (R. layout. main); textview TV = new textview (this); TV. settext ("tset"); setcontentview (TV); log. V ("test", "content") ;}