WebView Rendering Issue in Android KitKat

android webview chromium android-4.4-kitkat
gnuanu picture gnuanu · Dec 19, 2013 · Viewed 37.5k times · Source

I've been working on an application which have a WebView in which a static page get loaded from the assets (Also using JavaScript). This WebView is not working in KitKat, it remains blank. I am aware of the change in rendering engine (webkit to chromium) which happened in WebView in kitkat and tried the steps for migrating, which is given in Android Developers page. But it didn't help.

In logcat I am getting an error which is thrown from the Chromium source.

W/AwContents﹕ nativeOnDraw failed; clearing to background color.

Please suggest a workaround.

Answer

georgiecasey picture georgiecasey · Feb 26, 2014

In my case, in Android 4.4, I was getting a black background no matter I set what and this error message in my LogCat: nativeOnDraw failed; clearing to background color.

From Googling, it seems to be because hardware accelerated canvas rendering is not supported in Chromium WebView. I added this line to the WebView to turn off hardware accelerated canvas and now it works.

mWebview.setLayerType(View.LAYER_TYPE_SOFTWARE, null);

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