onDestroy gets called each time the screen goes on

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If you want to stop the destroy/create issue that is the default in android because of an orientation change and lock in one orientation then you need to add code and xml

In your activites code (notes about the xml)

    // When an android device changes orientation usually the activity is destroyed and recreated with a new 
    // orientation layout. This method, along with a setting in the the manifest for this activity
    // tells the OS to let us handle it instead.
    //
    // This increases performance and gives us greater control over activity creation and destruction for simple 
    // activities. 
    // 
    // Must place this into the AndroidManifest.xml file for this activity in order for this to work properly 
    //   android:configChanges="keyboardHidden|orientation"
    //   optionally 
    //   android:screenOrientation="landscape"
    @Override
    public void onConfigurationChanged(Configuration newConfig) 
    {
        super.onConfigurationChanged(newConfig);
    }

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