如何在第二个标签中整合插页式广告？

Question

我创建了一个包含2个标签和Ad Mob的应用，我的问题是如何在第2个标签中集成插页式广告？ ，表示按照Google AdMob policy限制每个用户操作后放置插页式广告，但是当我从第一个标签向第二个标签滑动时我想要添加全屏广告，并且当我从第二个标签滑动到第一个标签时限制广告标签。我怎样才能做到这一点？ 通过示例和更正指导我！以下是我当前的活动。

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boolean firstResume = true;

	private ViewPager viewPager;
	private FBTabsAdapter mAdapter;
	private ActionBar actionBar;
	Handler handler1 = new Handler();
	private Context context;
	private int i = 0;
	private boolean exitAds = false;
	// private Fragment _fragment;

	// Tab titles
	private String[] tabs = { "TAB 1", " TAB 2" };

	@Override
	protected void onResume() {
		super.onResume();
		if (!firstResume) {

		} else {
			firstResume = false;
		}
	}

	@Override
	public void onTabReselected(Tab tab, FragmentTransaction ft) {
	}

	@Override
	public void onTabSelected(Tab tab, FragmentTransaction ft) {
		// on tab selected
		// show respected fragment view
		viewPager.setCurrentItem(tab.getPosition());
		if (tab.getPosition() == 1) {
			Log.e("UPDATED", "DOWNLOADS SELECTED");
			final DownloadsFragment fragment = ((DownloadsFragment) getSupportFragmentManager()
					.findFragmentByTag("android:switcher:" + R.id.pager + ":1"));
			fragment.updateDownloads();

			// if (i == 0) {
			// i++;
			// } else if (i > 0) {
			// }

		} // else
			// displayInterstitial();
	}

	@Override
	public void onTabUnselected(Tab tab, FragmentTransaction ft) {
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

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TABS ADAPTER

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package xxxxxx.xxxxxxxxxxx.xxxxxxxxx.com;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;


public class ABTabsAdapter extends FragmentPagerAdapter {
    public ABTabsAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int index) {

        switch (index) {
            case 0:
                // Top Rated fragment activity
                return new TAB1Fragment();
            case 1:
                // fragment activity
                return new TAB2Fragment();
        }

        return null;
    }

    @Override
    public int getCount() {
        // get item count - equal to number of tabs
        return 2;
    }
    
}

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