java.lang.IllegalStateException: Calling View methods on another thread than the UI thread

Question

When trying to open a webview on my nexus 4 now with Android 4.4 (Kit kat) I'll getting this error message:

Calling View methods on another thread than the UI thread.; 
java.lang.IllegalStateException: Calling View methods on another thread than the UI thread.
com.android.webview.chromium.WebViewChromium.createThreadException(WebViewChromium.java:268)

Since i update to Android 4.4 my Nexus 4.

Answer 1

just check migrating web view of 4.4 google added and changed some things in it here

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        // Code for WebView goes here
    }
});


// This code is BAD and will block the UI thread
webView.loadUrl("javascript:fn()");
while(result == null) {
  Thread.sleep(100);
}

Answer 2

what's your code like? you can try

 runOnUiThread(new Runnable() {
        @Override
        public void run() {

            // TODO Your code
        }
    });

Answer 3

If runOnUiThread is not available for whatever reason, you can also use the following code to bypass this error (say you are wanting access to a View without needing to display it):

Handler handler = new Handler(Looper.getMainLooper());
try
{
    handler.post(
        new Runnable()
        {
            @Override
            public void run()
            {
                DesiredMethod(); // Where this method runs the code you're needing
            }
        }
    );
} catch (Exception e)
{
    e.printStackTrace();
}