Question

从18 sep开始，我的应用中遇到了很多崩溃，仅使用4.2.2中的Google Play服务广告。有报告：

java.lang.NullPointerException
   at android.webkit.WebSettingsClassic.getDefaultUserAgentForLocale(WebSettingsClassic.java:453)
   at android.webkit.WebViewClassic$Factory.getDefaultUserAgent(WebViewClassic.java:1503)
   at android.webkit.WebSettings.getDefaultUserAgent(WebSettings.java:1280)
   at com.google.android.gms.ads.internal.util.g.a(SourceFile:348)
   at com.google.android.gms.ads.internal.n.e.a(SourceFile:275)
   at com.google.android.gms.ads.internal.b.<init>(SourceFile:296)
   at com.google.android.gms.ads.internal.b.<init>(SourceFile:277)
   at com.google.android.gms.ads.AdManagerCreatorImpl.a(SourceFile:36)
   at com.google.android.gms.ads.internal.client.o.onTransact(SourceFile:66)
   at android.os.Binder.transact(Binder.java:310)
   at com.google.android.gms.internal.ar$a$a.a()
   at com.google.android.gms.internal.ah.b()
   at com.google.android.gms.internal.ah.a()
   at com.google.android.gms.internal.au.aM()
   at com.google.android.gms.internal.au.a()
   at com.google.android.gms.ads.doubleclick.PublisherAdView.loadAd()
   at ...

在尝试加载新广告时，您可以看到错误提示。有错误的人知道怎么解决吗？

There is a Google Groups thread但谷歌没有说什么。唯一的时态解决方案是在Android 4.2.2中避免加载广告。

时间解决方案

Kenfoo发布基于处理异常的时态解决方案，并在一段时间（5天）内停用广告：

// Setup your default error handler
static Thread.UncaughtExceptionHandler defaultExceptionHandler = null;
Context context = your context

final Thread.UncaughtExceptionHandler defaultHandler =  Thread.getDefaultUncaughtExceptionHandler();
defaultExceptionHandler = new Thread.UncaughtExceptionHandler() {
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        for (int nest=0;nest<10 && ex!=null;nest++, ex=ex.getCause()) {
            StackTraceElement[] stelist = ex.getStackTrace();
            for (StackTraceElement ste : stelist) {
                if (ste.getClassName().contains("com.google.android.gms.ads")) {
                    // Save the last time google play ads crashed.
                    // Next time our app starts, we won't activate ads if it happened
                    // within the last N days.
                    SharedPreferences prefs = Settings.getPreferences(context);
                    SharedPreferences.Editor editor = prefs.edit();
                    editor.putLong("admob_crash_time", System.currentTimeMillis());
                    editor.commit();
                    break;
                }
            }
        }
        if (defaultHandler != null) {
            defaultHandler.uncaughtException(thread, ex);
        }
    }
};
Thread.setDefaultUncaughtExceptionHandler(defaultExceptionHandler);

然后在您的初始化广告的活动启动中：

Context context = your activity or context;
ViewGroup myadframelayout = your frame or parent layout holding the ad;

SharedPreferences prefs = Settings.getPreferences(context);
long lastAdmobCrashTime = prefs.getLong(admob_crash_time, 0);
long timeSinceLastCrash = System.currentTimeMillis() - lastAdmobCrashTime;
// Last crash >= 5 days ago. Try Admob...
if (timeSinceLastCrash >= 5*24*60*60*1000) {
    try {
        adView = new AdView(context);
        adView.setAdUnitId("YOUR ADMOB AD ID");
        adView.setAdSize(AdSize.SMART_BANNER);
        adView.loadAd(new AdRequest.Builder().build());
        myadframelayout.addView(adView);
    } catch (Throwable t) {
        // No revenue from this guy for today... :(
    }
} else {
    // Don't run admob. Do whatever you like here.
    adView = null;
}

在你的onResume，onPause，等等，如果adView为null则不做任何事情。

我会尝试这个补丁同时谷歌没有解决它。此外，谷歌最终做出了回应，并表示将在几天内推出修复程序。 86％的碰撞属于阿尔卡特One Touch 7041X和7041D。

Google Play服务中的DFP广告管理系统会在4.2.2中导致NullPointerException

0 个答案: