Question

I am a beginner in android programming, now i am working on an android application which displays the data in a sort order by default and also provides a search facility. For this i have written an activity called search that will search the contents and displays in a listview. My problem is when i rotate the device the onCreate method of the Activity class is called even after overridding the onConfigurationChanged method. I had also done the following changes in the manifest file to invoke the onConfigurationChanged method.

<activity
    android:name=".Search"
    android:configChanges="orientation|keyboardHidden"
    android:screenOrientation="sensor" >
</activity>

My Search Activity is as follows :

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  System.out.println("HERE AT ONCREATE");
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    System.out.println("HERE AT ON CONFIGURATION CHANGED");
    if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
        setContentView(R.layout.search_port);
    } else if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
        setContentView(R.layout.search_land);
    }
}

So the output while rotating the device will be :

1. HERE AT ON CONFIGURATION CHANGED

2. HERE AT ONCREATE

I dont want to get the onCreate() method called while rotating the device. Please help me to solve this issue. I am using Android 2.2 SDK with Samsung Galaxy Tab (7 inch display).

Answer 1

What you’re trying to accomplish with the above code can be done much more simply.

If you change your layout files name to be both the same: search_layout.xml and place them in your project this way :

<project>/res/layout/search_layout.xml       // Portrait Layout
<project>/res/layout-land/search_layout.xml  // Landscape Layout

And then modify your Activity this way :

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    Log.i("Search Activity", "onCreate() was called.");
}

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    Log.i("Search Activity", "onConfigurationChanged was called.");
}

That’s how I have it setup in my Activity and the onCreate() method is only called once.