# 在 Android 中实现插页式广告

> 在 Android 应用程序中实现插页式广告。加载广告内容，通过 Java 代码展示广告，并使用监听器来管理广告事件。

要使用 `UnityAds` API 来展示全屏插页式广告，请执行以下操作：

1. [初始化](/grow/ads/android-sdk/initialize-sdk.md) SDK。
2. 使用 [`load`](/grow/ads/android-sdk/android-api.md#load) API 为指定的[广告单元](/grow/dashboard/ad-units.md)加载广告。
3. 广告加载后，可使用 [`show`](/grow/ads/android-sdk/android-api.md#show) API 来展示广告。

## 插页式广告示例##interstitial-ad-example

在此示例中，只要 Unity Ads 已成功初始化，就可以在游戏中希望展示插页式广告的任何位置调用 `DisplayInterstitialAd`。

> **Note:**
>
> Unity Ads 需要访问当前正在运行的 Activity，所以下面的示例使用 `getApplicationContext()`。
> 由于这可能不适合所有实现，因此可能需要进行一些定制（具体取决于集成情况）。

1. **Java**

   ```java
     import android.app.Activity;
     import android.os.Bundle;
     import android.util.Log;

     import androidx.appcompat.app.AppCompatActivity;

     import com.unity3d.ads.IUnityAdsLoadListener;
     import com.unity3d.ads.IUnityAdsShowListener;
     import com.unity3d.ads.UnityAdsShowOptions;
     import com.unity3d.ads.example.R;

     import com.unity3d.ads.IUnityAdsInitializationListener;
     import com.unity3d.ads.UnityAds;

     public class ShowInterstitialAd extends AppCompatActivity implements IUnityAdsInitializationListener  {

     private String unityGameID = "1234567";
     private Boolean testMode = true;
     private String adUnitId = "video";

     private IUnityAdsLoadListener loadListener = new IUnityAdsLoadListener() {
        @Override
        public void onUnityAdsAdLoaded(String placementId) {
           UnityAds.show((Activity)getApplicationContext(), adUnitId, new UnityAdsShowOptions(), showListener);
        }

        @Override
        public void onUnityAdsFailedToLoad(String placementId, UnityAds.UnityAdsLoadError error, String message) {
           Log.e("UnityAdsExample", "Unity Ads failed to load ad for " + placementId + " with error: [" + error + "] " + message);
        }
     };

     private IUnityAdsShowListener showListener = new IUnityAdsShowListener() {
        @Override
        public void onUnityAdsShowFailure(String placementId, UnityAds.UnityAdsShowError error, String message) {
           Log.e("UnityAdsExample", "Unity Ads failed to show ad for " + placementId + " with error: [" + error + "] " + message);
        }

        @Override
        public void onUnityAdsShowStart(String placementId) {
           Log.v("UnityAdsExample", "onUnityAdsShowStart: " + placementId);
        }

        @Override
        public void onUnityAdsShowClick(String placementId) {
           Log.v("UnityAdsExample", "onUnityAdsShowClick: " + placementId);
        }

        @Override
        public void onUnityAdsShowComplete(String placementId, UnityAds.UnityAdsShowCompletionState state) {
           Log.v("UnityAdsExample", "onUnityAdsShowComplete: " + placementId);
        }
     };

     @Override
     protected void onCreate (Bundle savedInstanceState) {
        super.onCreate (savedInstanceState);
        setContentView (R.layout.activity_main);
        // Initialize the SDK:
        UnityAds.initialize(getApplicationContext(), unityGameID, testMode, this);
     }

     @Override
     public void onInitializationComplete() {
        DisplayInterstitialAd();
     }

     @Override
     public void onInitializationFailed(UnityAds.UnityAdsInitializationError error, String message) {
        Log.e("UnityAdsExample", "Unity Ads initialization failed with error: [" + error + "] " + message);
     }

     // Implement a function to load an interstitial ad.The ad will start to show after the ad has been loaded.
     public void DisplayInterstitialAd () {
        UnityAds.load(adUnitId, loadListener);
     }
     }
   ```

**后续步骤**：请参阅关于[在 Android 中实现奖励广告](/grow/ads/android-sdk/rewarded-ads.md)的文档以改进您的实现。