Android: return to main activity problems

In my main activity I have a menu and when a menu option is selected an Intent is created and a new activity is started. When that acti开发者_Python百科vity completes the process should return back to the main activity and all its previous states according to the ActivityLifeCycle.

I notice that when it returns back to the main activity, nothing is accessable and the screen dims. I can only get back to what I expect when I press the menu softkey.

Has anyone experienced this issue before? Feedback would be appreciated! Code sample below:

@Override
protected void onResume(){          
    super.onResume();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.main_menu, menu);
    return true;
}    

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle item selection
    switch (item.getItemId()) {
    case R.id.menu_settings: 
        return true;            
    case R.id.menu_decks:
        Intent launchDecks = new Intent(this, stackDecks.class);
        startActivity(launchDecks);             
        return true;        
    case R.id.menu_exit:  
        this.onDestroy();
        this.finish();
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}   

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The code in the first post is actually correct(I have something very similar). There is a great chance the error is in the menu.xml res file, even though it inflates without any problems. Check it is fully consistent in both places, and has the same items. I finally solved it after hours of experimenting.

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You seemed to be confused with the use of super.

super.m() is used to call a superclass method.

If you inherit the method with no override then super.m() = this.m() See your super.onDestroy

It s absoluetly useless to override a method m() just to call super.m() See your onResume

Sometimes it is usefull to call a super clas method, it allows you to benefit from this code in a subclass. For instance here onCreateMenuOptions is overriden and your subclass can benefit from some imitialisation code for a menu.

Regards, Stéphane