使用ViewPager时出现间隙广告问题

Question

我想在我的viewPager中添加间隙广告，但一旦间隙广告关闭（或打开时），我就遇到了容器“消失”（或被销毁）的问题。一旦滑动，就会自动调用@Override方法“public void destructionitem（ViewGroup container，int position，Object Object）”，并调用间隙ad，但是，视图不会像未调用间隙ad时那样再次膨胀。

我的类扩展了PagerAdapter，我的一般设置如下：

@Override
public boolean isViewFromObject(View view, Object object) {
    // TODO Auto-generated method stub
    return view == ((RelativeLayout) object);
}

@Override
public Object instantiateItem(final ViewGroup container, final int position) {

    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    //instantiate TextViews, Buttons, ect (code not posted)

    ((ViewPager) container)
            .setOnPageChangeListener(new OnPageChangeListener() {
                @Override
                public void onPageSelected(int position) {
                    // the maximum position value is 130
                    // I want to display an interstitial ad every 7th position

                    if (position % 7 == 0) {
                        displayInterstitial();
                    }

                }

                @Override
                public void onPageScrollStateChanged(int state) {
                    // TODO Auto-generated method stub
                }

                @Override
                public void onPageScrolled(int position,
                        float positionOffset, int positionOffsetPixels) {
                    // TODO Auto-generated method stub
                }
            });



    if (interstitialLoad == false && isConnection == false) {
        if (NetworkUtils.isConnected(context) == true
                && NetworkUtils.isNetworkActive(context) == true) {
            isConnection = true;

            // create an ad
            interstitialAd = new InterstitialAd(context);
            interstitialAd.setAdUnitId(AD_UNIT_ID_INT);

            // request interstitial ads
            AdRequest adRequestInterstitial = new AdRequest.Builder()
                    .build();

            // begin loading interstitial
            interstitialAd.loadAd(adRequestInterstitial);
        }
    }

    if (isConnection = true) {
        // Set the AdListener.
        interstitialAd.setAdListener(new AdListener() {
            @Override
            public void onAdClosed() {
                // do nothing
            }

            @Override
            public void onAdLoaded() {
                if (interstitialLoad == false) {
                    interstitialLoad = true;
                }
            }

            @Override
            public void onAdFailedToLoad(int errorCode) {
                String message = String.format("onAdFailedToLoad (%s)",
                        getErrorReason(errorCode));
                Log.e(TAG, message);
            }
        });
    }

    // add fragments to container (ViewPager)
    ((ViewPager) container).addView(itemView);
    return itemView;

}

/** Gets a string error reason from an error code. */
private String getErrorReason(int errorCode) {
    String errorReason = "";
    switch (errorCode) {
    case AdRequest.ERROR_CODE_INTERNAL_ERROR:
        errorReason = "Internal error";
        break;
    case AdRequest.ERROR_CODE_INVALID_REQUEST:
        errorReason = "Invalid request";
        break;
    case AdRequest.ERROR_CODE_NETWORK_ERROR:
        errorReason = "Network Error";
        break;
    case AdRequest.ERROR_CODE_NO_FILL:
        errorReason = "No fill";
        break;
    }
    return errorReason;
}

// invoke displayInterstitial() when ready to display an interstitial
private void displayInterstitial() {
    if (interstitialLoad == true && interstitialAd.isLoaded()) {
        Log.e(TAG, "displayInterstitial()");
        interstitialAd.show();
    }
}

@Override
public void restoreState(Parcelable state, ClassLoader loader) {
    // TODO Auto-generated method stub
    super.restoreState(state, loader);
}

@Override
public Parcelable saveState() {
    // TODO Auto-generated method stub
    return super.saveState();
}

@Override
public void destroyItem(ViewGroup container, int position, Object object) {
    ((ViewPager) container).removeView((RelativeLayout) object);

}

这是事情发生的顺序（假设我们在位置6（pg 6））：

1） 当我滑动到第7页时，首先会自动调用@Override destroyItem（ViewGroup container，int position，Object Object）方法。

2） 然后自动调用@Override onPageSelected（int position）方法，并显式调用displayInterstitual（）方法。

3）从displayInterstiular（）方法内部，显示间隙广告。此时，自动调用@Overder方法saveState（）。

4） 作为“最终用户”，我单击“X”或按设备后退按钮关闭显示的广告。

5） 整个视图（或/和容器）将消失。我所期望的行为是调用@Override方法restoreState（），然后我仍然可以看到我的容器及其视图。

我怎样才能让一切都从间隙被调用和关闭之前停止的地方恢复过来？有人对如何解决这个问题有任何想法吗？提前感谢！

Answer 1

谢谢你的回答，丹和我想出了一个解决办法。我的问题是，在第一个广告显示并销毁后，我需要重新加载一个新广告。因此，我基本上在AdListener中重新实例化，我的冲突得到了解决。每7次滑动，无限显示广告单位。干杯

if (isConnection == true) {
            // Set the AdListener.
            interstitialAd.setAdListener(new AdListener() {
                @Override
                public void onAdClosed() {
                    // do nothing
                    Log.i(TAG, "onAdClosed()");     
                    LayoutInflater inflater = (LayoutInflater) context
                            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

                    int layoutColorId = ElementStructure.arrayLayoutColor.get(position);

                    if (layoutColorId == 1) {
                        itemView = inflater.inflate(R.layout.frame_learn_a, container,
                                false);
                    } else if (layoutColorId == 2) {
                        itemView = inflater.inflate(R.layout.frame_learn_b, container,
                                false);
                    } else if (layoutColorId == 3) {
                        itemView = inflater.inflate(R.layout.frame_learn_c, container,
                                false);
                    } else if (layoutColorId == 4) {
                        itemView = inflater.inflate(R.layout.frame_learn_d, container,
                                false);
                    }

                    // reload interstitial ad
                    if (NetworkUtils.isConnected(context) == true
                            && NetworkUtils.isNetworkActive(context) == true) {
                        Log.i(TAG, "Internet connection detected :: reload interstitial");
                        if (isConnection == false) {
                            isConnection = !isConnection;
                        }

                        // create an ad
                        interstitialAd = new InterstitialAd(context);
                        interstitialAd.setAdUnitId(AD_UNIT_ID_INT);

                        // request interstitial ads
                        AdRequest adRequestInterstitial = new AdRequest.Builder()
                                .build();

                        // begin loading interstitial
                        interstitialAd.loadAd(adRequestInterstitial);
                    }
                }

                @Override
                public void onAdLoaded() {
                    if (interstitialLoad == false) {
                        Log.e(TAG, "onAdLoaded (interstitial)");
                        interstitialLoad = !interstitialLoad;
                    }
                }

                @Override
                public void onAdFailedToLoad(int errorCode) {
                    String message = String.format("onAdFailedToLoad (%s)",
                            getErrorReason(errorCode));
                    Log.e(TAG, message);
                }
            });
        }

Answer 2

可能与你的问题无关但是

if (isConnection = true) {

应该是：

if (isConnection == true) {