Webview plugins are no longer supported. Is there another way to display flash?

Question

I am making my flash game into an Android app with the following code. It works just fine but the compiler gives the error

The method setPluginState(WebSettings.PluginState) from the type WebSettings is deprecated

Here is the code.

webview.getSettings().setJavaScriptEnabled(true);

webview.getSettings().setPluginState(PluginState.ON);

webview.loadUrl("file:///android_asset/myflashgame.swf");

This code works but it wont for long.

Is there another way to make an app of my flash game? I tried converting the .swf file to html5 with Google Swiffy but the game became very slow and laggy. Is there another way?