Question

我一直试图弄清楚如何将广告添加到我的项目中好几天。我希望你们能告诉我该怎么做。我试图在第一轮后广告（玩家第一次去世）后关闭广告;它会让他们再次玩。

没有广告出现，我收到的错误如下：

09-02 17:14:53.825: W/dalvikvm(635): threadid=11: thread exiting with uncaught exception     (group=0x40a13300)
09-02 17:14:53.835: E/AndroidRuntime(635): FATAL EXCEPTION: GLThread 75
09-02 17:14:53.835: E/AndroidRuntime(635): java.lang.NullPointerException
09-02 17:14:53.835: E/AndroidRuntime(635):  at     com.JrodManU.LaserJumper.android.Ad.loadAd(Ad.java:45)
09-02 17:14:53.835: E/AndroidRuntime(635):  at     com.JrodManU.LaserJumper.android.AndroidLauncher.loadAd(AndroidLauncher.java:26)
09-02 17:14:53.835: E/AndroidRuntime(635):  at   com.JrodManU.LaserJumper.LaserJumper.loadAd(LaserJumper.java:36)
09-02 17:14:53.835: E/AndroidRuntime(635):  at com.JrodManU.LaserJumper.screens.InGameScreen.    <init>(InGameScreen.java:51)
09-02 17:14:53.835: E/AndroidRuntime(635):  at     com.JrodManU.LaserJumper.LaserJumper.create(LaserJumper.java:15)
09-02 17:14:53.835: E/AndroidRuntime(635):  at     com.badlogic.gdx.backends.android.AndroidGraphics.onSurfaceChanged(AndroidGraphics.java:236)
09-02 17:14:53.835: E/AndroidRuntime(635):  at     android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1505)
09-02 17:14:53.835: E/AndroidRuntime(635):  at     android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240)

我的课程：

AndroidLauncher

package com.JrodManU.LaserJumper.android;

import android.os.Bundle;

import com.badlogic.gdx.backends.android.AndroidApplication;
import com.badlogic.gdx.backends.android.AndroidApplicationConfiguration;
import com.JrodManU.LaserJumper.GameEventListener;
import com.JrodManU.LaserJumper.LaserJumper;

public class AndroidLauncher extends AndroidApplication implements GameEventListener {
    Ad ad = new Ad();
    @Override
    protected void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();
        initialize(new LaserJumper(this), config);
    }

    @Override
    public void showAd() {
        ad.showAd();
    }

    @Override
    public void loadAd() {
        ad.loadAd();
    }

    @Override
    public boolean isShowing() {
        return ad.isShowing();
    }

    @Override
    public boolean isLoaded() {
        return ad.isLoaded();
    }
}

InGameScreen（屏幕类）

package com.JrodManU.LaserJumper.screens;

import com.JrodManU.LaserJumper.LaserJumper;

public class InGameScreen implements Screen {
    LaserJumper game;
    boolean firstTime;

    public InGameScreen(LaserJumper game) {
        this.game = game;
        game.loadAd();
        firstTime = true;
    }

    @Override
    public void render(float delta) {
        generalUpdate();
    }

    private void generalUpdate() {
        if(playerDied) {
            if(firstTime && game.isLoaded()) {
                System.out.println("hi");
                game.showAd();
                firstTime = false;
                while(game.isShowing()) {
                    //Waiting for the ad to go away..
                }
        }
    }

package com.JrodManU.LaserJumper.android;

import com.JrodManU.LaserJumper.GameEventListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.InterstitialAd;
import com.google.android.gms.ads.AdListener;

import android.app.Activity;
import android.os.Bundle;

public class Ad extends Activity implements GameEventListener{
    private InterstitialAd mInterstitialAd;
    public static boolean showing;
    public static boolean loaded;    

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mInterstitialAd = new InterstitialAd(this);
        mInterstitialAd.setAdUnitId("*****");
        AdRequest.Builder adRequestBuilder = new AdRequest.Builder();
        adRequestBuilder.addTestDevice(AdRequest.DEVICE_ID_EMULATOR);
        mInterstitialAd.setAdListener(new AdListener() {
            @Override
            public void onAdClosed() {
                showing = false;
            }

            @Override
            public void onAdLoaded() {
                loaded = true;
            }
        });
    }

    public void showAd() {
        if (mInterstitialAd.isLoaded()) {
            mInterstitialAd.show();
            showing = true;
        }
    }

    public void loadAd() {
        AdRequest.Builder adRequestBuilder = new AdRequest.Builder();
        mInterstitialAd.loadAd(adRequestBuilder.build());
    }

    public boolean isShowing() {
        if(showing) {
            return true;
        } else {
            return false;
        }
    }

    public boolean isLoaded() {
        if(loaded) {
            return true;
        } else {
            return false;
        }
    }
}

LaserJumper（主要类）

package com.JrodManU.LaserJumper;

import com.JrodManU.LaserJumper.screens.*;
import com.badlogic.gdx.Game;

public class LaserJumper extends Game{
    InGameScreen inGameScreen;
    public Preferences preferences;
    public GameEventListener gameEventListener;
    @Override
    public void create() {
        inGameScreen = new InGameScreen(this);
        setScreen(inGameScreen);
    }

    public void changeToInGame() {
        inGameScreen = new InGameScreen(this);
        setScreen(inGameScreen);
    }

    public LaserJumper(GameEventListener listener) {
        gameEventListener = listener;
    }

    public void showAd() {
        gameEventListener.showAd();
    }

    public void loadAd() {
        gameEventListener.loadAd();
    }

    public boolean isShowing() {
        return gameEventListener.isShowing();
    }

    public boolean isLoaded() {
        return gameEventListener.isLoaded();
    }
}

最后，接口GameEventListener

package com.JrodManU.LaserJumper;

public interface GameEventListener {
    public void showAd();
    public void loadAd();
    public boolean isShowing();
    public boolean isLoaded();
}

Answer 1

您的插页式广告位于单独的活动Ad中，然后您直接将其实例化为Ad ad = new Ad();

你永远不应该像那样实例化Android活动（他们使用Intents启动活动的方式），因为活动必须服从Activity lifecycle，Android将通过活动生命周期方法调用。

结果是Ad Activity的onCreate（）方法没有被调用，你的InterstitialAd从未被实例化，后来导致了NPE。

解决方案提案：

请勿为插页式广告制作额外的活动。根本没有必要。而是在AndroidLauncher中移动插页式广告初始化。
使用处理程序管理广告的展示/隐藏。这里描述：libgdx admob wiki。（该教程指的是遗留的admob，但与新admob的差异很小，我仍然认为它是最好的教程）它的工作方式与普通横幅相同。

我做错了什么，如何添加插页式广告

1 个答案: