Android life cycle (iii)

The life cycle of an Android application is more clear than the explanation.

Create a demo with the following code:

public class Mainactivity extends Activity {private static final String TAG = "Android_life"; @Overrideprotected void Oncre Ate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); LOG.I (TAG, "onctreate ()"); Setcontentview (R.layout.activity_main);} protected void OnStart () {Super.onstart (); LOG.I (TAG, "OnStart ()");} protected void Onresume () {super.onresume (); LOG.I (TAG, "Onresume ()");} protected void OnPause () {super.onpause (); LOG.I (TAG, "OnPause ()");} protected void OnDestroy () {Super.ondestroy (); LOG.I (TAG, "OnDestroy ()");}

The effect of running the program is as follows:

1) The first time you run the program, you can find the log information as follows: "Note time"

03-10 20:38:11.531:i/android_life (4635): Onctreate ()
03-10 20:38:11.641:i/android_life (4635): OnStart ()
03-10 20:38:11.641:i/android_life (4635): Onresume ()

2) Turn off the phone screen

03-10 20:38:11.531:i/android_life (4635): Onctreate ()
03-10 20:38:11.641:i/android_life (4635): OnStart ()
03-10 20:38:11.641:i/android_life (4635): Onresume ()
03-10 20:38:29.451:i/android_life (4635): OnPause ()

3) Activate the phone screen

03-10 20:38:11.531:i/android_life (4635): Onctreate ()
03-10 20:38:11.641:i/android_life (4635): OnStart ()
03-10 20:38:11.641:i/android_life (4635): Onresume ()
03-10 20:38:29.451:i/android_life (4635): OnPause ()
03-10 20:53:51.631:i/android_life (4635): OnStart ()
03-10 20:53:51.731:i/android_life (4635): Onresume ()

4) exit the application and you can see the log

03-10 20:57:51.161:i/android_life (5779): OnDestroy ()

Android life cycle (iii)