Avoid Webview's to crash when the activity is gone

gistfile1.java

mv.setWebChromeClient(new WebChromeClient() {
	@Override
	public boolean onCreateWindow(WebView view, boolean isDialog, boolean isUserGesture, Message resultMsg) {
		if (getActivity()==null || !view.getWindowToken().isBinderAlive()) {
			TouiteurLog.d(false, "pretend we will create a window but it's not possible anymore");
		return true;
	}
	return super.onCreateWindow(view, isDialog, isUserGesture, resultMsg);
}

@Override
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
	if (getActivity()==null || !view.getWindowToken().isBinderAlive()) {
		TouiteurLog.d(false, "pretend we will create a JsAlert but it's not possible anymore msg:"+message);
		return true;
	}
	return super.onJsAlert(view, url, message, result);
}

@Override
public boolean onJsConfirm(WebView view, String url, String message, JsResult result) {
	if (getActivity()==null || !view.getWindowToken().isBinderAlive()) {
		TouiteurLog.d(false, "pretend we will create a JsConfirm but it's not possible anymore msg:"+message);
		return true;
	}
	return super.onJsConfirm(view, url, message, result);
}

@Override
public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, JsPromptResult result) {
	if (getActivity()==null || !view.getWindowToken().isBinderAlive()) {
		TouiteurLog.d(false, "pretend we will create a JsPrompt but it's not possible anymore msg:"+message);
		return true;
	}
	return super.onJsPrompt(view, url, message, defaultValue, result);
}

@Override
public boolean onJsBeforeUnload(WebView view, String url, String message, JsResult result) {
	if (getActivity()==null || !view.getWindowToken().isBinderAlive()) {
		TouiteurLog.d(false, "pretend we will run a JsBeforeUnload but it's not possible anymore msg:"+message);
			return true;
		}
		return super.onJsBeforeUnload(view, url, message, result);
	}
});