Handle screen rotation without losing data - Android

Question

I'm becoming crazy figuring out what is the best way to handle screen rotation. I read hundreds of questions/answers here but I'm really confused.

How can I save myClass data before the activity is re-created so I can keep everything for redrawing activity without another useless initialization?

Is there a cleaner and better way than parcelable?

I need to handle rotation because I want to change layout in Landscape mode.

public class MtgoLifecounterActivity extends Activity {      MyClass myClass;      // Called when the activity is first created     @Override     public void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.main);          If ( ?? first run...myClass == null ? ) {             myClass = new MyClass();         } else {             // do other stuff but I need myClass istance with all values.         }         // I want that this is called only first time.          // then in case of rotation of screen, i want to restore the other instance of myClass which         // is full of data.     } 

Answer 1

In Activity Tag of Manifest you should have to mention

<activity         android:name="com.example.ListActivity"         android:label="@string/app_name"          android:configChanges="keyboardHidden|orientation"> 

If you are using Android 2.3(API level 13 ) and above use

<activity         android:name="com.example.Activity"         android:label="@string/app_name"          android:configChanges="keyboardHidden|orientation|screenSize"> 

It should have to work.

It will work only with activity tag and not with application tag