activity-lifecycle

问题 I have 2 activities (A and B) and they have 2 buttons to switch between. A oncreate B oncreate A oncreate A onresume what I wanted to do is after sending intent from B to A oncreate should not be called but at this point it does. To overcome that I found FLAG_ACTIVITY_REORDER_TO_FRONT (from here) and thought it could called only onresume but it didn't. 回答1: FLAG_ACTIVITY_REORDER_TO_FRONT does exactly what you think it should do. However, if you start ActivityA and then ActivityA starts

问题 I have 2 activities (A and B) and they have 2 buttons to switch between. A oncreate B oncreate A oncreate A onresume what I wanted to do is after sending intent from B to A oncreate should not be called but at this point it does. To overcome that I found FLAG_ACTIVITY_REORDER_TO_FRONT (from here) and thought it could called only onresume but it didn't. 回答1: FLAG_ACTIVITY_REORDER_TO_FRONT does exactly what you think it should do. However, if you start ActivityA and then ActivityA starts

问题 I have 2 activities (A and B) and they have 2 buttons to switch between. A oncreate B oncreate A oncreate A onresume what I wanted to do is after sending intent from B to A oncreate should not be called but at this point it does. To overcome that I found FLAG_ACTIVITY_REORDER_TO_FRONT (from here) and thought it could called only onresume but it didn't. 回答1: FLAG_ACTIVITY_REORDER_TO_FRONT does exactly what you think it should do. However, if you start ActivityA and then ActivityA starts

问题 I register receiver in onResume() and unregister it in onPause() method. I can strange error in my Crashlytics reports: Fatal Exception: java.lang.RuntimeException Unable to pause activity {package-here}: java.lang.IllegalArgumentException: Receiver not registered: Caused by java.lang.IllegalArgumentException Receiver not registered: It happened 3 times (3 users) on 20k installs. Is it possible that onPause() gets called if onResume() hasn't been called before? I thought it isn't. 回答1: If it

问题 I register receiver in onResume() and unregister it in onPause() method. I can strange error in my Crashlytics reports: Fatal Exception: java.lang.RuntimeException Unable to pause activity {package-here}: java.lang.IllegalArgumentException: Receiver not registered: Caused by java.lang.IllegalArgumentException Receiver not registered: It happened 3 times (3 users) on 20k installs. Is it possible that onPause() gets called if onResume() hasn't been called before? I thought it isn't. 回答1: If it

问题 We are using Robospice 1.4.12 with okhttp. Everything is working fine except getting the results from a request when user taps home button and then comes back to the activity. Example: we fire a request and then press home button and we wait for request to finish, when we come back to the activity the listener never gets notified. If we come back before the request finishes everything works ok. Orientation changes are working fine. We are using LruCacheObjectPersister for in memory cache. Now

问题 I have three activity: - SplashActivity - MainActivity - PlayerActivity Of course the app starts with SplashActivity, then it starts MainActivity and closes. MainActivity in some moment starts PlayerActivity and goes to backstack. (MainActivity is alive but is onStop) Then I need open MainActivity and set PlayerActivity to background (PlayerActivity is alive but is onStop). Then I need open PlayerActivity again and set MainActivity to background. So PlayerActivity and MainActivity often gets

问题 I have three activity: - SplashActivity - MainActivity - PlayerActivity Of course the app starts with SplashActivity, then it starts MainActivity and closes. MainActivity in some moment starts PlayerActivity and goes to backstack. (MainActivity is alive but is onStop) Then I need open MainActivity and set PlayerActivity to background (PlayerActivity is alive but is onStop). Then I need open PlayerActivity again and set MainActivity to background. So PlayerActivity and MainActivity often gets

问题 I have alway used onCreate method inside my Activity lifecycle to start or restore from a saved state, but recently found that there is another onCreate method which contains a PersistableBundle : @Override public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) { super.onCreate(savedInstanceState, persistentState); } I only found that it has been added since Android 21. Could anyone please give a complete information about this method, when it calls and the usage?

问题 I have alway used onCreate method inside my Activity lifecycle to start or restore from a saved state, but recently found that there is another onCreate method which contains a PersistableBundle : @Override public void onCreate(Bundle savedInstanceState, PersistableBundle persistentState) { super.onCreate(savedInstanceState, persistentState); } I only found that it has been added since Android 21. Could anyone please give a complete information about this method, when it calls and the usage?