Android: NoClassDefFoundError android.os.AsyncTask

Question

Since a couple of weeks, I\'m seeing more and more crashes of my app with the following exception

Fatal Exception: java.lang.NoClassDefFoundError android.os.AsyncTas

Answer 1

Same issue here. I see them for 95% of the cases on android 4.0.3 devices. remaining 5% for 2.3 devices

Errors are randomly occurring from different parts of the code. Some examples:

   java.lang.NoClassDefFoundError: android/os/AsyncTask
   at android.webkit.WebView.setupPackageListener(WebView.java:1305)
   at android.webkit.WebView.(WebView.java:1176)
   at android.webkit.WebView.(WebView.java:1136)

and

   java.lang.NoClassDefFoundError: android/os/AsyncTask
   at android.webkit.WebView.setupPackageListener(WebView.java:1354)
   at android.webkit.WebView.access$10900(WebView.java:363)
   at android.webkit.WebView$PrivateHandler.handleMessage(WebView.java:10411)

and

   java.lang.NoClassDefFoundError: android.os.AsyncTask
   at android.webkit.WebView.setupPackageListener(WebView.java:1385)
   at android.webkit.WebView.(WebView.java:1192)
   at android.webkit.WebView.(WebView.java:1150)
   at android.webkit.WebView.(WebView.java:1135)
   at android.webkit.WebView.(WebView.java:1106)
   at android.webkit.WebView.(WebView.java:1093)
   at com.google.android.gms.ads.internal.util.g.f(SourceFile:400)
   at com.google.android.gms.ads.internal.util.g.a(SourceFile:385)

it is completely unclear why these errors are happening. usually i dont see anything in the stacktrace pointing to my code.