我成功地在我的应用程序中实现了AdMob中间广告，但唯一的问题是它们不可点击。

下面是我的AdMob.java类：

import android.app.Activity;

import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.InterstitialAd;

public class Admob extends AdListener{

    private Activity ctx;

    //Admob
    private InterstitialAd interstitial;
    private AdRequest adRequest;

    private String unitId;

    public static boolean fromAdmob = false;

    public Admob(Activity ctx, String unitId)
    {
        this.ctx    = ctx;
        this.unitId = unitId;

        try{
            this.interstitial = new InterstitialAd(this.ctx);
            interstitial.setAdUnitId(unitId);

            interstitial.setAdListener(this);
            adRequest = new AdRequest.Builder().build();
        }
        catch (Exception e){
            e.printStackTrace();
        }
    }

    public void loadAd()
    {
        try{
            interstitial.loadAd(adRequest);
        }
        catch (Exception e){
            e.printStackTrace();
        }
    }

    @Override
    public void onAdLoaded() {
        try{
            fromAdmob = true;
            interstitial.show();
        }
        catch (Exception e){
            e.printStackTrace();
        }
    }

    @Override
    public void onAdFailedToLoad(int errorCode)
    {

    }

    @Override
    public void onAdClosed() {
        fromAdmob = false;
    }

}

和MainPageActivity.java文件：

public class MainPageActivity extends Activity implements IGameListener, IEventDelegate{

    //Tags
    private static final String TAG = "bubblesMainPage";

    //Context
    public static Activity instance;

    //Media
    private MediaPlayer mp;

    //Ads
    private Admob admob;

    //TapSDK
    private Tap tap;

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

        overridePendingTransition(R.anim.fade_in, R.anim.fade_out);

        tr
            Tap.establish(this);
            tap = new Tap(this, "xxxx");
        }
        catch (Exception e){
            e.printStackTrace();
        }


        //Admob
        this.admob = new Admob(this, "ADMOB_ID");

        //Context
        instance = this;

        //Media
        mp = MediaPlayer.create(getApplicationContext(), R.raw.background_music);
        mp.setLooping(true);


      //Set activity properties
        try {
            requestWindowFeature(Window.FEATURE_NO_TITLE);

            getWindow().setFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON, WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        } catch (Exception e) {
            e.printStackTrace();
        }

        //Intents & Listeners
        final Intent gamePlayActivity = new Intent(this, BubbleShooterActivity.class);
        BubbleShooterActivity.listener = this;


        //Animations
        Animation scaleUpAnim = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.scale_up);
        findViewById(R.id.play_button).startAnimation(scaleUpAnim);

        //UI Events
        findViewById(R.id.play_button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                new Thread(new Runnable() {
                    @Override
                    public void run() {
                        try {
                            startActivity(gamePlayActivity);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }).start();


            }
        });

        findViewById(R.id.more_games_button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                tap.showMoreGamesWithViewControllerAndAppID((IEventDelegate)instance);

            }
        });

    }

    /*
    Game methods - start
     */

    @Override
    public void onGameStart() {
        Log.i(TAG, "onGameStart");
    }

    @Override
    public void onLevelFailed() {

        //Level failed window
        try{
            Intent i = new Intent(this, LostActivity.class);
            startActivity(i);
        }
        catch (Exception e){
            e.printStackTrace();
        }

        Log.i(TAG, "onLevelFailed");
    }

    @Override
    public void onLevelUp() {
        Log.i(TAG, "onLevelUp");

        if(admob != null){
            runOnUiThread(new Runnable() {
                @Override
                public void run() {

                    try{
                        admob.loadAd();
                    }
                    catch (Exception e){
                        e.printStackTrace();
                    }

                    try{
                        Intent i = new Intent(instance, WonActivity.class);
                        startActivity(i);
                    }
                    catch (Exception e){
                        e.printStackTrace();
                    }
                }
            });
        }

    }

    @Override
    public void onGameEnd() {
        Log.i(TAG, "onGameEnd");
    }

    /*
    TapSDK methods - start
     */
    @Override
    public void viewDidAppear() {
        Log.i(TAG, "TapSDK: viewDidAppear");
    }

    @Override
    public void viewDidDisappear() {
        Log.i(TAG, "TapSDK: viewDidDisappear");
    }

    @Override
    public void viewConnectFail(String s) {
        Log.i(TAG, "TapSDK: viewConnectFail " + s);
    }

    @Override
    public void conversion() {
        Log.i(TAG, "TapSDK: conversion");
    }

    @Override
    public void onOfferComplete(int score) {
        Log.i(TAG, "TapSDK: onOfferComplete " + score);
    }

    /*
    Activity methods start
     */

    @Override
    public void onBackPressed() {

        Log.i(TAG, "onBackPressed");

        try{
            Intent exitScreen = new Intent(this, ExitActivity.class);
            startActivity(exitScreen);
        }
        catch (Exception e){
            e.printStackTrace();
            Log.e(TAG, "onBackPressed: " + e.getMessage());
        }

    }

    @Override
    protected void onStart() {
        super.onStart();

        // Monitor launch times and interval from installation
        RateThisApp.onStart(this);
        // If the criteria is satisfied, "Rate this app" dialog will be shown
        RateThisApp.showRateDialogIfNeeded(this);
    }

    @Override
    protected void onResume()
    {
        super.onResume();

        if(tap != null)
            tap.onResume();

        mp.seekTo(0);
        mp.start();
    }

    @Override
    protected void onPause()
    {
        if(tap != null)
            tap.onPause();

        mp.pause();

        super.onPause();
    }

    @Override
    protected void onDestroy()
    {
        mp.stop();
        mp = null;

        if(tap != null)
            tap.onDestroy();

        super.onDestroy();
    }


}

我不知道当用户升级并按下播放按钮（这将引导他进入下一个级别）时，该如何显示间隙广告。当他按下home键时，间隙广告就会出现，这会把他带到MainActivity屏幕上。

有人能帮我把广告点击一下吗？另外，有什么建议，如何添加的间隙广告后，每一个完成的关卡？当某人完成一个关卡并按下播放按钮时，会出现一个间隙广告，当该广告关闭时，他应该可以播放下一个关卡。

我真的很感谢你的帮助！