Implementing an interstitial AD

InterstitialActivity
callback: loadInterstitial
Disable button
Set text to “Loading Interstitial”
Property: mShowButton
callback: showInterstitial (empty)
set to disable in onCreate

interstitial_ad_unit_id

<LinearLayout
	xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/linearLayout"
	android:orientation="vertical"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<Button
		android:id="@+id/loadButton"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="Load Interstitial"
		android:onClick="loadInterstitial"/>
	<Button
		android:id="@+id/showButton"
		android:layout_width="fill_parent"
		android:layout_height="wrap_content"
		android:text="Interstitial Not Ready"
		android:onClick="showInterstitial" />
</LinearLayout>	

public class InterstitialActivity extends Activity {
	private Button mShowButton;

	@Override
	public void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_interstitial);

		mShowButton = (Button) findViewById(R.id.showButton);
		mShowButton.setEnabled(false);
	}

	public void loadInterstitial(View unusedView){
		mShowButton.setEnabled(false);
		mShowButton.setText("Loading Interstitial");
	}

	public void showInterstitial(view unusedView){
	}
}