onCreate() von Activity 1 wird nach jedem startActivityForResult() neu aufgerufen

public class MainActivity extends Activity implements OnClickListener {
 ...
 ActionBar actionBar;
 boolean iCheckNewState = true;  [COLOR=seagreen]//Hieran sehe ich, dass onCreate()[/COLOR] [COLOR=seagreen]immer neu durchlaufen wird[/COLOR]
 boolean iFileIsSelected = false;
 ...
 
 @Override
 [B]protected void onCreate(Bundle savedInstanceState)[/B] {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main_activity);
 
 [COLOR=seagreen] //Hier zeigt es immer true, obwohl ich die globale Variable auf false ändere[/COLOR]
[COLOR=seagreen] //Trotz erneutem Durchlauf der onCreate() sollte es hier doch false zeigen... oder?[/COLOR]
  Toast.makeText(this, "" + iCheckNewState, 1000).show();   
 
  if (iCheckNewState == true) {
   actionBar = getActionBar();
   actionBar.setCustomView(R.layout.actionbar);
   actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM | ActionBar.DISPLAY_SHOW_HOME);
 
   iCheckNewState = false;
  }
 
  ...
 }
 
 @Override
 [B]public void onClick(View v)[/B] {
  switch (v.getId()) {
  case R.id.buOK:
   [COLOR=seagreen]//Aufruf der Activity 2[/COLOR]
   Intent intent = new Intent(MainActivity.this, SelectFile.class);
   startActivityForResult(intent, 0);
   break;
  case R.id.buStart:  [COLOR=seagreen]//<-- Der deaktivierte Button der ActionBar[/COLOR]
   if (iFileIsSelected == true) {
    [COLOR=seagreen]//TODO[/COLOR]
   } else {
    Toast.makeText(this, "Öffnen sie zuerst eine Datei!", 1000).show();
   }
  }
  ...
 }
 
 @Override
 [B]protected void onActivityResult(int requestCode, int resultCode, Intent data[/B]) {
  super.onActivityResult(requestCode, resultCode, data);
 
  if (resultCode == RESULT_OK && requestCode == 0) {
   ...
   iFileIsSelected = true;   [COLOR=seagreen]//Aktivieren den Button der ActionBar[/COLOR]
  }
 }
}

public class SelectFile extends Activity implements OnClickListener {
 private Intent iIntent;
 ...
 
 @Override
 [B]protected void onCreate(Bundle savedInstanceState)[/B] {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.select_file);
 
  iIntent = getIntent();
  ...
 }
 
 ...
 
 @Override
 [B]public void onClick(View v)[/B] {
  switch (v.getId()) {
  case R.id.selected:
 [COLOR=seagreen] //Daten zurück an Activity 1 geben[/COLOR]
   iIntent.putExtra("fileData", products);
   setResult(RESULT_OK, iIntent);
   finish();
   break;
  }
 }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="[URL]http://schemas.android.com/apk/res/android[/URL]"
    package="de.test"
    android:versionCode="1"
    android:versionName="1.0" >
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_USER_DICTIONARY" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_USER_DICTIONARY" />
    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="16" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/appicon"
        android:label="@string/app_name"
        android:screenOrientation="landscape"
        android:theme="@android:style/Theme.Holo.Light.DarkActionBar" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="landscape" >
            <intent-filter android:label="@string/app_name" >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name=".SelectFile"
            android:label="@string/app_name"
            android:screenOrientation="landscape" >
            <intent-filter>
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
        </activity>
    </application>
</manifest>