Question

hi all i hav a lil problem.
actually i have two layouts layout-port and layout-land.
and 2 screens. both screens are in both modes of layout.
1) First Screen is Login Password Screen
2) Second Screen is ListView Screen

Now whenever i rotate my cell phone. it recreates the onCreate() method. and then change the layout as per required.

Now due to that recalling of onCreate() my list data is regenerated. How to overcome this problem. Please Tell me..

i even tried writing the following code in the menifest file

android:configChanges="orientation|keyboard|keyboardHidden"

This code works in a sense that it does not recall the onCreate() method but now the problem is that, it also does not change the layout automatically.
Mean if i m in portrait then rotate it to landscape it will not change the Layout mode.
Please guide what can i do with it.

Thanks a bunch in advance

Answer 1

Save some value in onRetainNonConfigurationInstance method
so you can check getLastNonConfigurationInstance() is null, If null only do your list data generate code

i.e in you onCreate do like this

final Object data = getLastNonConfigurationInstance();

    // The activity is starting for the first time
    if (data == null) {
        //code to generate list data 
    } else {
        // The activity was destroyed/created automatically

    }

Refer this Faster Screen Orientation Change,