ADMOB-java.lang.IllegalStateException：必须在主 UI 线程上调用 isLoaded

Question

我是 android 新手，它是我的 AndroidLauncherjava 文件用于内部代码

       @Override public void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        RelativeLayout layout = new RelativeLayout(this);
        AndroidApplicationConfiguration config = new AndroidApplicationConfiguration();


        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);

        // Create the libgdx View
        View gameView = initializeForView(new MyGdxGame(this),config);


        AdView adView = new AdView(this);
        adView.setAdUnitId("ca-app-pub-6916351754834612/9855033027");
        adView.setAdSize(AdSize.BANNER);
        adView.loadAd(new AdRequest.Builder()
        .build()); 

        layout.addView(gameView);

        // Add the AdMob view
        RelativeLayout.LayoutParams adParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        adParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
        adParams.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
        adView.setLayoutParams(adParams);
        adView.setBackgroundColor(Color.BLACK);

        layout.addView(adView, adParams);


       iAd = new InterstitialAd(this);
        iAd.setAdUnitId(AD_UNIT_ID);
        loadInterstitial();
        iAd.setAdListener(new AdListener() {
            @Override
            public void onAdLoaded() {
                }

            @Override
            public void onAdFailedToLoad(int errorCode) {

            }
        });
        setContentView(layout);
       }

    public void loadInterstitial() {
        /*AdRequest adRequest = new AdRequest.Builder()
        .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
        .addTestDevice("0FD328B10106BD9B2BE832163D43D085")
        .build();*/
        AdRequest adRequest = new AdRequest.Builder().build();
        iAd.loadAd(adRequest);

        //iAd.loadAd(adRequest);
    }

    public void showInterstitial() {
        if (iAd.isLoaded()) {
            iAd.show();
        } else {
            //Log.d(TAG, "Interstitial ad is not loaded yet");
        }
    }

这是我的插页式广告代码；我得到了。java.lang.IllegalStateException: isLoaded must be called on the main UI thread在这里检查了一些解决方案，无法修复。我知道 iAd 没有加载。任何人都可以帮助我，我哪里出错了。先感谢您

Answer 1

您没有显示showInterstitial()正在调用的位置，其中包含对isLoaded!
请检查您的堆栈跟踪以获取更多线索。

我会盲目地说您是showInterstitial从事件侦听器或其他（Gdx？）后台线程调用的。如果是这种情况，您有两个选择：

做到showInterstitial()万无一失

public void showInterstitial() {
    if(Looper.myLooper() != Looper.getMainLooper()) {
        runOnUiThread(new Runnable() {
            @Override public void run() {
                doShowInterstitial();
            }
        });
    } else {
        doShowInterstitial();
    }
}
private void doShowInterstitial() {
    if (iAd.isLoaded()) {
        iAd.show();
    } else {
        //Log.d(TAG, "Interstitial ad is not loaded yet");
    }
}

让调用代码更智能

void myMethodCallingShowInterstitial() {
    ... doing my other background stuff ...
    // replace showInterstitial(); with below:
    activityReference.runOnUiThread(new Runnable() {
        @Override public void run() {
            activityReference.showInterstitial();
        }
    });
    ... doing my other background stuff ...
}

在上述两种情况下，您在之后所做的任何事情都runOnUiThread不能依赖于插页式广告的显示！如果您不小心实现了两者，这不是问题，因为万无一失的方法不会将其再次发布到 UI。

作为替代方案，runOnUiThread您可以使用 a Handler，有关更多信息，请参阅官方文档。