Question

I have a little problem to detect when the application is finished. I need to do some actions onDestroy like save the parameters into the database and make a final connection to the server.

The problem is that if I put the code in onDestroy its is called when the orientation changes for example. Putting

android:configChanges="orientation|keyboardHidden"

in the manifest for that activity the landscape/portrait layouts don’t swap. And adding

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    setContentView(R.layout.main);
}

Changes the layouts but the buttons and labels do not get the onClickListeners and the text labels correctly. How can I solve that? Thanks

Answer 1

The problem is that your layout items aren’t initialized again because you’re initializing them in your onCreate() function, and then you’re disrupting them with a new layout in onConfigurationChanged().

One option is to move the initialization to a new function that gets called from both onCreate() and onConfigurationChanged().

Another option is to use the android:onclick="" (and related) attributes in your layout.

The option I would choose is different though. I would allow Android to manage orientation (and to call onDestroy()) and in onDestroy() I would install an Alarm for, say, 10 seconds (which I imagine is plenty of time to have onCreate() called again). In onCreate() I would cancel the alarm. When the alarm fires, I would perform my save actions.