App crash on clicking select box in webview

Question

I am using a webview in my application. Webview is created using application context . App crashes on clicking any select box

04-10 14:19:14.502: E/AndroidRuntime(12628): Uncaught handler: thread main exiting due to uncaught exception
04-10 14:19:14.542: E/AndroidRuntime(12628): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.view.ViewRoot.setView(ViewRoot.java:476)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.app.Dialog.show(Dialog.java:239)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.webkit.WebView$InvokeListBox.run(WebView.java:9509)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.os.Handler.handleCallback(Handler.java:609)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.os.Handler.dispatchMessage(Handler.java:92)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.os.Looper.loop(Looper.java:123)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at android.app.ActivityThread.main(ActivityThread.java:4595)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at java.lang.reflect.Method.invokeNative(Native Method)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at java.lang.reflect.Method.invoke(Method.java:521)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-10 14:19:14.542: E/AndroidRuntime(12628):    at dalvik.system.NativeStart.main(Native Method)

I am well aware that this question has been asked already many times, but I am yet to find any working solution. This problem will get solved if I use activity context but I have to use application context due to some other concerns. For other alerts and dialogs I have handled them by overriding onJsAlert() in webchromeclient, but I am not able to find how I can intercept this in my webview and create my own selector dialog.

Any kind of suggestions/help is much appreciated.

Adding a dummy sample of my webview implementation

class MyWebView extends WebView
{

 MyWebView(Context context)
 {

    super(context.getApplicationContext());
    setWebChromeClient(myWebChromeClient);
    setWebViewClient(myWebViewClient);
 }
}

Answer 1

This is because you pass the application context instead of an activity context when you create the WebView. To show a select box in Android from the WebView, the WebView uses the context given to it in its constructor and opens a native single choice selector. To show this selector dialog it needs an Activity context and not an Application's one. Change the line:

super(context.getApplicationContext());

With this line:

super(context);

You also need to make sure you use the web view in the activity from which you created it (there is no sense in using it on a different activity). If you need the web view in a different activity, just create one using the designated activity's context.