Android Question Null pointer exception on webview

[focus330]

I have an app published that crashes few times with this code;

java.lang.NullPointerException
    at android.webkit.WebViewClassic$PrivateHandler.handleMessage(WebViewClassic.java:12985)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:176)
    at android.app.ActivityThread.main(ActivityThread.java:5365)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
    at dalvik.system.NativeStart.main(Native Method)

I use webview in a simple mode, that is I display an HTML page loaded with this code:

    Dim s As String
    s = "file://" & File.DirInternalCache & "/advert.htm"
    If File.Exists (File.DirInternalCache,"advert.htm") = True Then
        WebView1.LoadURL(s)  
    End If

The error occurs sometimes with 4.1 4.2 and 4.3 Android versions. Other versions seem to run correctly.

Note that in the activity there are only two buttons and nothink more.

Can someone help me ? Thanks

 

[LucaMs]

http://stackoverflow.com/questions/...ava-android-webkit-webviewprivatehandler-hand

http://stackoverflow.com/questions/...android-webkit-webviewclassic-setbaselayerweb

https://www.b4x.com/android/forum/t...nullpointerexception-at-android-webkit.48340/

 

[focus330]

Thanks. I'll read and hope .. Then I'll give a return.

 

[focus330]

Here another link
https://groups.google.com/forum/#!category-topic/google-admob-ads-sdk/QvUhH5ZGIHQ

The problem seems not to be caused by the app code but seems a problem using admob, Only In 4.1 4.2 and 4.3