插页式广告不会让应用启动

Question

我遇到了一个问题：我正在尝试在我的应用程序中添加插页式广告，我认为这很容易，因为我已经有了传统的广告并且效果很好，但是出了点问题..

这是我的代码 (in_app_billing_system):

 import com.google.android.gms.ads.AdListener;
 import com.google.android.gms.ads.AdRequest;
 import com.google.android.gms.ads.AdSize;
 import com.google.android.gms.ads.AdView;
 import com.google.android.gms.ads.InterstitialAd;
 ...
 ...
 ...
 mInterstitialAd = new InterstitialAd(this);
 mInterstitialAd.setAdUnitId("ca-app-pub-3940256099942544/1033173712");
 AdRequest adRequestI = new AdRequest.Builder().addTestDevice("bla bla bla").build();
 mInterstitialAd.loadAd(adRequestI);

这是我的错误：

08-07 10:03:00.495 13565-13565/? E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: ****, PID: 13565 java.lang.RuntimeException: Unable to start activity ComponentInfo{*****.ActMain}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2237) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2286) at android.app.ActivityThread.access0(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1246) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:212) at android.app.ActivityThread.main(ActivityThread.java:5135) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:877) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.NullPointerException at android.content.ContextWrapper.getPackageManager(ContextWrapper.java:94) at com.google.android.gms.common.GooglePlayServicesUtil.isGooglePlayServicesAvailable(Unknown Source) at com.google.android.gms.ads.internal.util.client.zza.zzP(Unknown Source) at com.google.android.gms.ads.internal.client.zze.zzb(Unknown Source) at com.google.android.gms.ads.internal.client.zzz.zzL(Unknown Source) at com.google.android.gms.ads.internal.client.zzz.zza(Unknown Source) at com.google.android.gms.ads.InterstitialAd.loadAd(Unknown Source) at ****.InAppBillingSystem.(InAppBillingSystem.java:46) at ****.ActMain.onCreate(ActMain.java:59) at android.app.Activity.performCreate(Activity.java:5231) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2201) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2286) at android.app.ActivityThread.access0(ActivityThread.java:144) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1246) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:212) at android.app.ActivityThread.main(ActivityThread.java:5135) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:877) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:693) at dalvik.system.NativeStart.main(Native Method)

我尝试使用 here 中的原始 Google 代码，但结果是一样的。

Main 中第 59 行的代码 Activity:

  //INSTALL APP
    if (IS_FIRST_START) tablesInit();

    if (loadFromPref("registered", "").equals("yes")) {
        is_purchased = true;
    } else {
        is_purchased = false;
 **59:    in_app_billing_system = new InAppBillingSystem(this);**
    }

我没用过这种广告，是不是我漏掉了什么？

P.S。不要与名称混淆 "in_app_billing_system" 它是过去的名字，现在我没有应用程序内有广告。

Answer 1

这是由于行：

mInterstitialAd = new InterstitialAd(this);

而不是我应该使用的：

mInterstitialAd = new InterstitialAd(myActivity);

问题已解决

插页式广告不会让应用启动

interstitial won't let app launch

android

interstitial

google-play-services