Life cycle of android--activities

Original: http://blog.csdn.net/w709835509/article/details/7655240

1 Importandroid.app.Activity;2 ImportAndroid.os.Bundle;3 4  Public classMainactivityextendsActivity {5     //Initialize operations here, such as interface loading and event binding6 @Override7      Public voidonCreate (Bundle savedinstancestate) {8         Super. OnCreate (savedinstancestate);9         if(Savedinstancestate! =NULL) {Ten             //Recovering temporary data OneString TempData = savedinstancestate.getstring ("Key"); A             // ... -         } -     } the  -     //Save temporary data here - @Override -      Public void onsaveinstancestate(Bundle outstate) { +         Super. Onsaveinstancestate (outstate); -         //The active a->b,a is in a stopped state and may be reclaimed by the system, at which point the back key still returns to a, but the OnCreate method of a is called instead of Onrestart, and the temporary data will no longer exist, such as interface data +         //with this parameter of bundle, temporary data can be saved, various put ...; When a is created, it is possible to remove the data from the bundle and perform related operations, such as: AString TempData = "This is temp data"; atOutstate.putstring ("Key", tempdata); -     } -  -     //Restart call, changed from stop state to run state - @Override -      Public voidOnrestart () { in         Super. Onrestart (); -         //when you know that the activity in this process is already visible, load the change to     } +  -     //called when the visible lifetime begins the @Override *      Public voidOnStart () { $         Super. OnStart ();Panax Notoginseng     } -  the     //the activity is ready to interact with the user--at the top of the stack. + @Override A      Public voidOnresume () { the         Super. Onresume (); +         //It is said that any paused UI updates, threads, or processes needed to recover the activity, but suspend them when inactive -     } $  $     //Activity is still visible when the activity is paused, such as when a dialog box pops up and the activity is paused - @Override -      Public void onPause() { the         //It is said that when an activity is not active in the foreground, the UI updates, threads, or CPU-intensive processes that do not need to be updated are suspended.  -         Super. OnPause ();Wuyi         //that is, release the CPU resources, save the key data, but the action must be fast, otherwise affect the new stack top activity the     } -  Wu     //activity is completely invisible - @Override About      Public void onStop() { $         //It is said that when the process is not visible, the remaining UI updates, threads, or processes that are not needed are suspended, all edits are saved, or -         //status changes because the process may be destroyed (thus releasing resources for other processes) -         Super. OnStop (); -     } A  +     //called at the end of the full lifetime the @Override -      Public voidOnDestroy () { $         //empty all resources, including ending threads, shutting down database connections, and so on.  the         Super. OnDestroy (); the     } the  the}

Life cycle of android--activities