Webview ZoomButtonsController

方法一：

On a Xoom I found that if one waits for the zoom control to fade out before calling WebView.destroy() a crash no longer occurs. So I've overwritten WebView.destroy() to post a message to a Handler to call WebView.destroy() after a few seconds. From WebView source we see the fade-out interval is:

// The time that the Zoom Controls are visible before fading awayprivate static final long ZOOM_CONTROLS_TIMEOUT =        ViewConfiguration.getZoomControlsTimeout();

So I used ViewConfiguration.getZoomControlsTimeout() + 1000L as the delay before calling WebView's destroy method. So far no crashes.

long timeout = ViewConfiguration.getZoomControlsTimeout();    new Timer().schedule(new TimerTask() {        @Override        public void run() {            webview.destroy();        }    }, timeout);

方法二：

If you only want to have pinch zoom working with your webview and you can live without the zoom buttons, you can do this to your webview:

webView.getSettings().setBuiltInZoomControls(true); // will give pinch zoomwebView.getSettings().setDisplayZoomControls(false); // but won't display the zoom buttons

adding

webView.getSettings().setBuiltInZoomControls(true);

in onDestroy / onDestroyView did not help on 3.x.

方法三：

Put this line in onDestroy works for me:

webView.setVisibility(View.GONE);