I have one site and the site is responsive. I used WebView to create an app for my site. Everything is OK but when play videos of my site Full-Screen button is disabled, how I can solve this problem thanks
and my activity code
public class MainActivity extends AppCompatActivity {
private WebView webView;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    webView=(WebView)findViewById(R.id.webView);
    webView.setWebViewClient(new WebViewClient());
    webView.getSettings().setJavaScriptEnabled(true);
    if (savedInstanceState == null)
    {
        webView.loadUrl(url);
    }
}
@Override
protected void onSaveInstanceState(Bundle outState )
{
    super.onSaveInstanceState(outState);
    webView.saveState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState)
{
    super.onRestoreInstanceState(savedInstanceState);
    webView.restoreState(savedInstanceState);
}
}